mirror of
https://github.com/raysan5/raygui.git
synced 2025-12-25 10:22:33 -05:00
Added a new example: animation curves (#268)
* A somewhat advanced example with custom curve controls. * Name update * typos * comments
This commit is contained in:
Pierre Jaffuer
GitHub
@ -354,7 +354,8 @@ EXAMPLES = \
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portable_window/portable_window \
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scroll_panel/scroll_panel \
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style_selector/style_selector \
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custom_sliders/custom_sliders
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custom_sliders/custom_sliders \
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animation_curve/animation_curve
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CURRENT_MAKEFILE = $(lastword $(MAKEFILE_LIST))
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480
examples/animation_curve/animation_curve.c
Normal file
480
examples/animation_curve/animation_curve.c
Normal file
@ -0,0 +1,480 @@
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/*******************************************************************************************
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*
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* Animation curves - An example demo for animation curves
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*
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* DEPENDENCIES:
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* raylib 4.0 - Windowing/input management and drawing.
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* raygui 3.0 - Immediate-mode GUI controls.
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*
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* COMPILATION (Windows - MinGW):
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* gcc -o $(NAME_PART).exe $(FILE_NAME) -I../../src -lraylib -lopengl32 -lgdi32 -std=c99
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*
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* LICENSE: zlib/libpng
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*
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* Copyright (c) 2023 Pierre Jaffuer (@smallcluster)
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*
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**********************************************************************************************/
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#include "raylib.h"
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#define RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT 24
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#define RAYGUI_IMPLEMENTATION
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#include "../../src/raygui.h"
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// raygui embedded styles
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#include "../style_selector/styles/style_cyber.h" // raygui style: cyber
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#include "../style_selector/styles/style_jungle.h" // raygui style: jungle
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#include "../style_selector/styles/style_lavanda.h" // raygui style: lavanda
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#include "../style_selector/styles/style_dark.h" // raygui style: dark
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#include "../style_selector/styles/style_bluish.h" // raygui style: bluish
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#include "../style_selector/styles/style_terminal.h" // raygui style: terminal
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#undef RAYGUI_IMPLEMENTATION // Avoid including raygui implementation again
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#define GUI_CURVE_EDIT_IMPLEMENTATION
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#include "gui_curve_edit.h"
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//------------------------------------------------------------------------------------
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// Helper function
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//------------------------------------------------------------------------------------
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void LoadDefaults(GuiCurveEditState curves[]);
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main()
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{
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// Initialization
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//---------------------------------------------------------------------------------------
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const int screenWidth = 800;
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const int screenHeight = 540;
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InitWindow(screenWidth, screenHeight, "Animation curves");
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SetTargetFPS(60);
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// Gui style
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GuiLoadStyleDefault();
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int visualStyleActive = 0;
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int prevVisualStyleActive = 0;
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float fontSize = GuiGetStyle(DEFAULT, TEXT_SIZE);
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const float margin = 8;
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// Gui states
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Vector2 scrollOffset = (Vector2) {0,0};
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Rectangle contentRect = (Rectangle) {0,0,0,0};
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bool moveSlider = false;
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bool sectionActive[5] = {false};
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sectionActive[0] = true;
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const char* sectionNames[5] = {"X Position", "Y Position", "Width", "Height", "Rotation"};
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bool editValueBox[5][4] = {false};
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char* valTextBox[5][4][20];
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bool playAnimation = true;
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bool showHelp = true;
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Rectangle settingsRect = (Rectangle) {screenWidth-screenWidth/3, 0, screenWidth/3, screenHeight};
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// Animation curves
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// 0 -> Ball X position
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// 1 -> Ball Y position
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// 2 -> Ball Width
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// 3 -> Ball Height
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// 4 -> Ball rotation
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GuiCurveEditState curves[5];
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LoadDefaults(curves);
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// Animation time
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float time = 0.f;
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float animationTime = 4.f;
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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if(playAnimation)
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time += GetFrameTime();
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// Reset timer
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if(time > animationTime)
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time = 0;
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// Ball animation
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const float t = time / animationTime;
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Vector2 ballPos = (Vector2) {EvalGuiCurve(&curves[0], t), EvalGuiCurve(&curves[1], t)};
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Vector2 ballSize = (Vector2) {EvalGuiCurve(&curves[2], t), EvalGuiCurve(&curves[3], t)};
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float ballRotation = EvalGuiCurve(&curves[4], t);
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// Update style
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if(visualStyleActive != prevVisualStyleActive){
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switch (visualStyleActive)
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{
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case 0: GuiLoadStyleDefault(); break;
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case 1: GuiLoadStyleJungle(); break;
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case 2: GuiLoadStyleLavanda(); break;
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case 3: GuiLoadStyleDark(); break;
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case 4: GuiLoadStyleBluish(); break;
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case 5: GuiLoadStyleCyber(); break;
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case 6: GuiLoadStyleTerminal(); break;
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default: break;
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}
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fontSize = GuiGetStyle(DEFAULT, TEXT_SIZE);
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prevVisualStyleActive = visualStyleActive;
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}
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// Update settings panel rect
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Rectangle sliderRect = (Rectangle) {settingsRect.x-4, settingsRect.y, 4, settingsRect.height};
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if(CheckCollisionPointRec(GetMousePosition(), sliderRect) && IsMouseButtonPressed(MOUSE_BUTTON_LEFT)){
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moveSlider = true;
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}
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if(IsMouseButtonUp(MOUSE_BUTTON_LEFT)){
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moveSlider = false;
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}
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if(moveSlider){
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settingsRect.x = GetMouseX();
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// Minimum-Maximum size
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if(settingsRect.x > screenWidth-4)
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settingsRect.x = screenWidth-4;
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else if(settingsRect.x < 4) // width of the slider
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settingsRect.x = 4;
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settingsRect.width = screenWidth-settingsRect.x;
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}
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(GetColor( GuiGetStyle(DEFAULT, BACKGROUND_COLOR)));
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// Scene
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//----------------------------------------------------------------------------------
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// sky
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DrawRectangle(curves[0].start, curves[1].end, curves[0].end-curves[0].start, curves[1].start-curves[1].end, BLUE);
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// ground
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DrawRectangle(curves[0].start, curves[1].start, curves[0].end-curves[0].start, 32, DARKGREEN);
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BeginScissorMode(curves[0].start, curves[1].end, curves[0].end-curves[0].start, curves[1].start-curves[1].end+32);
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// Draw ball
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DrawRectanglePro((Rectangle){ballPos.x, ballPos.y, ballSize.x, ballSize.y}, (Vector2){ballSize.x/2.f,ballSize.y/2.f}, ballRotation, PINK);
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// Local origin
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DrawLine(ballPos.x, ballPos.y, ballPos.x + cosf(ballRotation*DEG2RAD)*ballSize.x, ballPos.y +sinf(ballRotation*DEG2RAD)*ballSize.y, RED);
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DrawLine(ballPos.x, ballPos.y, ballPos.x + cosf((ballRotation+90)*DEG2RAD)*ballSize.x, ballPos.y +sinf((ballRotation+90)*DEG2RAD)*ballSize.y, GREEN);
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EndScissorMode();
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// Bounds
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DrawRectangleLines(curves[0].start, curves[1].end, curves[0].end-curves[0].start, curves[1].start-curves[1].end+32, GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL)));
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// GUI
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//----------------------------------------------------------------------------------
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// Help window
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if(showHelp){
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if(GuiWindowBox((Rectangle) {margin, margin, settingsRect.x-2*margin, curves[1].end-2*margin}, "help")){
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showHelp = false;
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}
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Rectangle helpTextRect = (Rectangle) {2*margin, 2*margin+RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT, settingsRect.x-4-4*margin, 0};
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GuiLabel((Rectangle) {helpTextRect.x, helpTextRect.y+helpTextRect.height, helpTextRect.width, fontSize}, "Curve widget controls:");
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helpTextRect.height += fontSize+margin;
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GuiLabel((Rectangle) {helpTextRect.x, helpTextRect.y+helpTextRect.height, helpTextRect.width, fontSize}, "- Left click to move/add point or move tangents");
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helpTextRect.height += fontSize+margin/2;
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GuiLabel((Rectangle) {helpTextRect.x, helpTextRect.y+helpTextRect.height, helpTextRect.width, fontSize}, "- While moving a tangent, hold SHIFT to disable tangent symetry");
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helpTextRect.height += fontSize+margin/2;
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GuiLabel((Rectangle) {helpTextRect.x, helpTextRect.y+helpTextRect.height, helpTextRect.width, fontSize}, "- Right click to remove a point");
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helpTextRect.height += fontSize+margin/2;
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DrawRectangleGradientV(margin, margin+curves[1].end-2*margin, settingsRect.x-2*margin, 12, (Color){0,0,0,100}, BLANK);
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}
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// Settings panel
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GuiScrollPanel(settingsRect, "Settings", contentRect, &scrollOffset);
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// Clip rendering
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BeginScissorMode(settingsRect.x, settingsRect.y+RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT, settingsRect.width, settingsRect.height);
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// Rebuild the content Rect
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contentRect = (Rectangle) {settingsRect.x+margin, RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT+margin, settingsRect.width-2*margin-GuiGetStyle(LISTVIEW, SCROLLBAR_WIDTH), 0};
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// Help button
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if(GuiButton((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, 1.5*fontSize}, GuiIconText(showHelp ? ICON_EYE_ON : ICON_EYE_OFF, "Curve controls help"))){
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showHelp = !showHelp;
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}
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contentRect.height += 1.5*fontSize + margin;
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// Animation Time slider
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animationTime = GuiSlider((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width/2, fontSize}, NULL, TextFormat("Animation Time: %.2fs", animationTime), animationTime, 1, 8);
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contentRect.height += fontSize + margin;
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// Load default curves
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if(GuiButton((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, 1.5*fontSize}, "Load default")){
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LoadDefaults(curves);
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animationTime = 4.f;
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time = 0.f;
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}
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contentRect.height += 1.5*fontSize + margin;
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// Styles
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GuiLabel((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, fontSize}, "Style:");
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contentRect.height += fontSize;
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visualStyleActive = GuiComboBox((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, 1.5*fontSize}, "default;Jungle;Lavanda;Dark;Bluish;Cyber;Terminal", visualStyleActive);
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contentRect.height += 1.5*fontSize + margin;
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// Draw curves with their controls
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//----------------------------------------------------------------------------------
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for(int i=0; i < 5; i++){
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// Collapsing section
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Rectangle headerRect = (Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, 1.5*fontSize};
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GuiStatusBar(headerRect, NULL);
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if(GuiLabelButton(headerRect, GuiIconText(sectionActive[i] ? ICON_ARROW_DOWN_FILL : ICON_ARROW_RIGHT_FILL, sectionNames[i]))){
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sectionActive[i] = !sectionActive[i];
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}
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contentRect.height += 1.5*fontSize + margin;
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// Skip this section
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if(!sectionActive[i])
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continue;
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// Draw curve control
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Rectangle curveRect = (Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, fontSize*12};
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EndScissorMode(); // Stop clipping from setting rect
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// Curves can leaks from control boundary... scissor it !
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BeginScissorMode(curveRect.x, curveRect.y, curveRect.width, curveRect.height);
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GuiCurveEdit(&curves[i],curveRect);
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EndScissorMode();
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// Resume clipping from setting rect
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BeginScissorMode(settingsRect.x, settingsRect.y+RAYGUI_WINDOWBOX_STATUSBAR_HEIGHT, settingsRect.width, settingsRect.height);
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contentRect.height += fontSize*12 + margin;
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// Draw selected point controls
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GuiCurveEditPoint* p = &(curves[i].points[curves[i].selectedIndex]);
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p->leftLinear = GuiCheckBox((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, 1.5*fontSize, 1.5*fontSize}, "Left Linear", p->leftLinear);
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p->rightLinear = GuiCheckBox((Rectangle){contentRect.x+contentRect.width/2, contentRect.y+contentRect.height+scrollOffset.y, 1.5*fontSize, 1.5*fontSize}, "Right Linear", p->rightLinear);
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contentRect.height += 1.5*fontSize + margin;
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// Positions
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GuiLabel((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, fontSize}, "Position");
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contentRect.height += fontSize;
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if(!editValueBox[i][0]){
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// transform x position to string
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gcvt(p->position.x, 6, valTextBox[i][0]);
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}
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if(!editValueBox[i][1]){
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// transform y position to string
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gcvt(curves[i].start + (curves[i].end-curves[i].start) * p->position.y, 6, valTextBox[i][1]);
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}
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// X pos
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if(GuiTextBox((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width/2-margin, 1.5*fontSize}, valTextBox[i][0], 20, editValueBox[i][0])){
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editValueBox[i][0] = !editValueBox[i][0];
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// input ended
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if(!editValueBox[i][0]){
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// Try to convert text to float and assign it to the point
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char * endPtr;
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double value = strtod( (char *) valTextBox[i][0], &endPtr);
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if ( endPtr != (char *) valTextBox[i][0] ) {
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p->position.x = value < 0 ? 0 : value > 1 ? 1 : value;
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}
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}
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}
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// Y pos
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if(GuiTextBox((Rectangle){contentRect.x+contentRect.width/2, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width/2, 1.5*fontSize}, valTextBox[i][1], 20, editValueBox[i][1])){
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editValueBox[i][1] = !editValueBox[i][1];
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// input ended
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if(!editValueBox[i][1]){
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// Try to convert text to float and assign it to the point
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char * endPtr;
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double value = strtod( (char *)valTextBox[i][1], &endPtr);
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if ( endPtr != (char *) valTextBox[i][1] ) {
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float normalizedVal = (value-curves[i].start) / (curves[i].end-curves[i].start);
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p->position.y = normalizedVal < 0 ? 0 : normalizedVal > 1 ? 1 : normalizedVal;
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}
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}
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}
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contentRect.height += 1.5*fontSize + margin;
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// Tangents
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GuiLabel((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width, fontSize}, "Tangents");
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contentRect.height += fontSize;
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if(!editValueBox[i][2]){
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// transform left tangent to string
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gcvt(p->tangents.x, 6, valTextBox[i][2]);
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}
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if(!editValueBox[i][3]){
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// transform right tangent to string
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gcvt(p->tangents.y, 6, valTextBox[i][3]);
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}
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// Left tan
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if(GuiTextBox((Rectangle){contentRect.x, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width/2-margin, 1.5*fontSize}, valTextBox[i][2], 20, editValueBox[i][2])){
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editValueBox[i][2] = !editValueBox[i][2];
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// input ended
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if(!editValueBox[i][2]){
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// Try to convert text to float and assign it to the point
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char * endPtr;
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double value = strtod( (char *) valTextBox[i][2], &endPtr);
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if ( endPtr != (char *) valTextBox[i][2] ) {
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p->tangents.x = value;
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}
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}
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}
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// Right tan
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if(GuiTextBox((Rectangle){contentRect.x+contentRect.width/2, contentRect.y+contentRect.height+scrollOffset.y, contentRect.width/2, 1.5*fontSize}, valTextBox[i][3], 20, editValueBox[i][3])){
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editValueBox[i][3] = !editValueBox[i][3];
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// input ended
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if(!editValueBox[i][3]){
|
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// Try to convert text to float and assign it to the point
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char * endPtr;
|
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double value = strtod( (char *) valTextBox[i][3], &endPtr);
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if ( endPtr != (char *) valTextBox[i][3] ) {
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p->tangents.y = value;
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}
|
||||
}
|
||||
}
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contentRect.height += 1.5*fontSize + margin;
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||||
|
||||
}
|
||||
contentRect.height += margin;
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||||
EndScissorMode();
|
||||
|
||||
// Settings panel shadow
|
||||
DrawRectangleGradientH(settingsRect.x-12, 0, 12, settingsRect.height, BLANK, (Color){0,0,0,100});
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|
||||
// Slider
|
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if(moveSlider){
|
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DrawRectangle(sliderRect.x, sliderRect.y, sliderRect.width, sliderRect.height, GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_PRESSED)));
|
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}else if(CheckCollisionPointRec(GetMousePosition(), sliderRect)){
|
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DrawRectangle(sliderRect.x, sliderRect.y, sliderRect.width, sliderRect.height, GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_FOCUSED)));
|
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}
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||||
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||||
// Draw Time controls
|
||||
//----------------------------------------------------------------------------------
|
||||
Rectangle timeLineRect = (Rectangle) {0, screenHeight-4*fontSize, settingsRect.x, 4*fontSize};
|
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GuiPanel((Rectangle) { timeLineRect.x, timeLineRect.y, timeLineRect.width, 2*fontSize}, NULL);
|
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GuiLabel((Rectangle) { timeLineRect.x, timeLineRect.y, timeLineRect.width, 2*fontSize}, TextFormat("Normalized Time: %.3f", time / animationTime));
|
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if(GuiButton((Rectangle) { timeLineRect.x+timeLineRect.width/2-2*fontSize-margin/4, timeLineRect.y, 2*fontSize, 2*fontSize}, GuiIconText(playAnimation ? ICON_PLAYER_PAUSE : ICON_PLAYER_PLAY, ""))){
|
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playAnimation = !playAnimation;
|
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}
|
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if(GuiButton((Rectangle) { timeLineRect.x+timeLineRect.width/2+margin/4, timeLineRect.y, 2*fontSize, 2*fontSize}, GuiIconText(ICON_PLAYER_STOP, ""))){
|
||||
playAnimation = false;
|
||||
time = 0;
|
||||
}
|
||||
time = animationTime * GuiSlider((Rectangle){timeLineRect.x, timeLineRect.y+2*fontSize, timeLineRect.width, timeLineRect.height-2*fontSize}, NULL, NULL, time / animationTime, 0, 1);
|
||||
|
||||
// Time panel shadow
|
||||
DrawRectangleGradientV(timeLineRect.x, timeLineRect.y-12, timeLineRect.width, 12, BLANK, (Color){0,0,0,100});
|
||||
|
||||
|
||||
EndDrawing();
|
||||
//----------------------------------------------------------------------------------
|
||||
}
|
||||
|
||||
CloseWindow(); // Close window and OpenGL context
|
||||
//--------------------------------------------------------------------------------------
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void LoadDefaults(GuiCurveEditState curves[]){
|
||||
// X pos
|
||||
curves[0].start = 28;
|
||||
curves[0].end = 506;
|
||||
curves[0].numPoints = 4;
|
||||
curves[0].selectedIndex = 0;
|
||||
curves[0].editLeftTangent = false;
|
||||
curves[0].editRightTangent = false;
|
||||
curves[0].points[0].position =(Vector2) {0.000000, 0.000000}; curves[0].points[0].tangents = (Vector2) {0.000000, 1.515101}; curves[0].points[0].leftLinear = 1;curves[0].points[0].rightLinear = 1;
|
||||
curves[0].points[1].position =(Vector2) {0.422414, 0.640000}; curves[0].points[1].tangents = (Vector2) {-2.824348, -4.494999};curves[0].points[1].leftLinear = 0;curves[0].points[1].rightLinear = 0;
|
||||
curves[0].points[2].position =(Vector2) {0.732759, 0.210000}; curves[0].points[2].tangents = (Vector2) {0.000000, 2.956133}; curves[0].points[2].leftLinear = 0;curves[0].points[2].rightLinear = 1;
|
||||
curves[0].points[3].position =(Vector2) {1.000000, 1.000000}; curves[0].points[3].tangents = (Vector2) {2.956133, 0.000000}; curves[0].points[3].leftLinear = 1;curves[0].points[3].rightLinear = 1;
|
||||
|
||||
// Y pos
|
||||
curves[1].start = 405;
|
||||
curves[1].end = 135;
|
||||
curves[1].numPoints = 7;
|
||||
curves[1].selectedIndex = 0;
|
||||
curves[1].editLeftTangent = false;
|
||||
curves[1].editRightTangent = false;
|
||||
curves[1].points[0].position = (Vector2) {0.000000, 1.000000};curves[1].points[0].tangents = (Vector2) { 0.000000 , 0.000000};curves[1].points[0].leftLinear = 0;curves[1].points[0].rightLinear = 0;
|
||||
curves[1].points[1].position = (Vector2) {0.140000, 0.000000};curves[1].points[1].tangents = (Vector2) {-10.000000 ,10.000000};curves[1].points[1].leftLinear = 0;curves[1].points[1].rightLinear = 0;
|
||||
curves[1].points[2].position = (Vector2) {0.450000, 0.000000};curves[1].points[2].tangents = (Vector2) {-10.000000 ,10.000000};curves[1].points[2].leftLinear = 0;curves[1].points[2].rightLinear = 0;
|
||||
curves[1].points[3].position = (Vector2) {0.670000, 0.000000};curves[1].points[3].tangents = (Vector2) {-10.000000 ,10.000000};curves[1].points[3].leftLinear = 0;curves[1].points[3].rightLinear = 0;
|
||||
curves[1].points[4].position = (Vector2) {0.830000, 0.000000};curves[1].points[4].tangents = (Vector2) {-10.000000 ,10.000000};curves[1].points[4].leftLinear = 0;curves[1].points[4].rightLinear = 0;
|
||||
curves[1].points[5].position = (Vector2) {0.940000, 0.000000};curves[1].points[5].tangents = (Vector2) {-10.000000 ,10.000000};curves[1].points[5].leftLinear = 0;curves[1].points[5].rightLinear = 0;
|
||||
curves[1].points[6].position = (Vector2) {1.000000, 0.000000};curves[1].points[6].tangents = (Vector2) {-10.000000 , 0.000000};curves[1].points[6].leftLinear = 0;curves[1].points[6].rightLinear = 0;
|
||||
|
||||
// X size
|
||||
curves[2].start = 1;
|
||||
curves[2].end = 64;
|
||||
curves[2].numPoints = 16;
|
||||
curves[2].selectedIndex = 0;
|
||||
curves[2].editLeftTangent = false;
|
||||
curves[2].editRightTangent = false;
|
||||
curves[2].points[0].position = (Vector2) {0.000000, 0.492063}; curves[2].points[0].tangents = (Vector2) {0,0}; curves[2].points[0].leftLinear = 0; curves[2].points[0].rightLinear = 0;
|
||||
curves[2].points[1].position = (Vector2) {0.130000, 0.492063}; curves[2].points[1].tangents = (Vector2) {0,0}; curves[2].points[1].leftLinear = 0; curves[2].points[1].rightLinear = 0;
|
||||
curves[2].points[2].position = (Vector2) {0.140000, 0.746032}; curves[2].points[2].tangents = (Vector2) {0,0}; curves[2].points[2].leftLinear = 0; curves[2].points[2].rightLinear = 0;
|
||||
curves[2].points[3].position = (Vector2) {0.150000, 0.492063}; curves[2].points[3].tangents = (Vector2) {0,0}; curves[2].points[3].leftLinear = 0; curves[2].points[3].rightLinear = 0;
|
||||
curves[2].points[4].position = (Vector2) {0.440000, 0.490000}; curves[2].points[4].tangents = (Vector2) {0,0}; curves[2].points[4].leftLinear = 0; curves[2].points[4].rightLinear = 0;
|
||||
curves[2].points[5].position = (Vector2) {0.450000, 0.682540}; curves[2].points[5].tangents = (Vector2) {0,0}; curves[2].points[5].leftLinear = 0; curves[2].points[5].rightLinear = 0;
|
||||
curves[2].points[6].position = (Vector2) {0.460000, 0.480000}; curves[2].points[6].tangents = (Vector2) {0,0}; curves[2].points[6].leftLinear = 0; curves[2].points[6].rightLinear = 0;
|
||||
curves[2].points[7].position = (Vector2) {0.660000, 0.492063}; curves[2].points[7].tangents = (Vector2) {0,0}; curves[2].points[7].leftLinear = 0; curves[2].points[7].rightLinear = 0;
|
||||
curves[2].points[8].position = (Vector2) {0.670000, 0.619048}; curves[2].points[8].tangents = (Vector2) {0,0}; curves[2].points[8].leftLinear = 0; curves[2].points[8].rightLinear = 0;
|
||||
curves[2].points[9].position = (Vector2) {0.680000, 0.492063}; curves[2].points[9].tangents = (Vector2) {0,0}; curves[2].points[9].leftLinear = 0; curves[2].points[9].rightLinear = 0;
|
||||
curves[2].points[10].position = (Vector2) {0.820000, 0.492063}; curves[2].points[10].tangents = (Vector2) {0,0}; curves[2].points[10].leftLinear = 0; curves[2].points[10].rightLinear = 0;
|
||||
curves[2].points[11].position = (Vector2) {0.830000, 0.619048}; curves[2].points[11].tangents = (Vector2) {0,0}; curves[2].points[11].leftLinear = 0; curves[2].points[11].rightLinear = 0;
|
||||
curves[2].points[12].position = (Vector2) {0.840000, 0.492063}; curves[2].points[12].tangents = (Vector2) {0,0}; curves[2].points[12].leftLinear = 0; curves[2].points[12].rightLinear = 0;
|
||||
curves[2].points[13].position = (Vector2) {0.930000, 0.492063}; curves[2].points[13].tangents = (Vector2) {0,0}; curves[2].points[13].leftLinear = 0; curves[2].points[13].rightLinear = 0;
|
||||
curves[2].points[14].position = (Vector2) {0.940000, 0.619048}; curves[2].points[14].tangents = (Vector2) {0,0}; curves[2].points[14].leftLinear = 0; curves[2].points[14].rightLinear = 0;
|
||||
curves[2].points[15].position = (Vector2) {0.950000, 0.492063}; curves[2].points[15].tangents = (Vector2) {0,0}; curves[2].points[15].leftLinear = 0; curves[2].points[15].rightLinear = 0;
|
||||
|
||||
// Y Size
|
||||
curves[3].start = 1;
|
||||
curves[3].end = 64;
|
||||
curves[3].numPoints = 16;
|
||||
curves[3].selectedIndex = 0;
|
||||
curves[3].editLeftTangent = false;
|
||||
curves[3].editRightTangent = false;
|
||||
curves[3].points[0].position = (Vector2) {0.000000, 0.492063};curves[3].points[0].tangents = (Vector2) {0,0};curves[3].points[0].leftLinear = 0;curves[3].points[0].rightLinear = 0;
|
||||
curves[3].points[1].position = (Vector2) {0.130000, 0.492063};curves[3].points[1].tangents = (Vector2) {0,0};curves[3].points[1].leftLinear = 0;curves[3].points[1].rightLinear = 0;
|
||||
curves[3].points[2].position = (Vector2) {0.140000, 0.238095};curves[3].points[2].tangents = (Vector2) {0,0};curves[3].points[2].leftLinear = 0;curves[3].points[2].rightLinear = 0;
|
||||
curves[3].points[3].position = (Vector2) {0.150000, 0.492063};curves[3].points[3].tangents = (Vector2) {0,0};curves[3].points[3].leftLinear = 0;curves[3].points[3].rightLinear = 0;
|
||||
curves[3].points[4].position = (Vector2) {0.440000, 0.492063};curves[3].points[4].tangents = (Vector2) {0,0};curves[3].points[4].leftLinear = 0;curves[3].points[4].rightLinear = 0;
|
||||
curves[3].points[5].position = (Vector2) {0.450000, 0.301587};curves[3].points[5].tangents = (Vector2) {0,0};curves[3].points[5].leftLinear = 0;curves[3].points[5].rightLinear = 0;
|
||||
curves[3].points[6].position = (Vector2) {0.460000, 0.492063};curves[3].points[6].tangents = (Vector2) {0,0};curves[3].points[6].leftLinear = 0;curves[3].points[6].rightLinear = 0;
|
||||
curves[3].points[7].position = (Vector2) {0.660000, 0.492063};curves[3].points[7].tangents = (Vector2) {0,0};curves[3].points[7].leftLinear = 0;curves[3].points[7].rightLinear = 0;
|
||||
curves[3].points[8].position = (Vector2) {0.670000, 0.365079};curves[3].points[8].tangents = (Vector2) {0,0};curves[3].points[8].leftLinear = 0;curves[3].points[8].rightLinear = 0;
|
||||
curves[3].points[9].position = (Vector2) {0.680000, 0.492063};curves[3].points[9].tangents = (Vector2) {0,0};curves[3].points[9].leftLinear = 0;curves[3].points[9].rightLinear = 0;
|
||||
curves[3].points[10].position = (Vector2) {0.820000, 0.492063};curves[3].points[10].tangents = (Vector2) {0,0};curves[3].points[10].leftLinear = 0;curves[3].points[10].rightLinear = 0;
|
||||
curves[3].points[11].position = (Vector2) {0.830000, 0.365079};curves[3].points[11].tangents = (Vector2) {0,0};curves[3].points[11].leftLinear = 0;curves[3].points[11].rightLinear = 0;
|
||||
curves[3].points[12].position = (Vector2) {0.840000, 0.492063};curves[3].points[12].tangents = (Vector2) {0,0};curves[3].points[12].leftLinear = 0;curves[3].points[12].rightLinear = 0;
|
||||
curves[3].points[13].position = (Vector2) {0.930000, 0.492063};curves[3].points[13].tangents = (Vector2) {0,0};curves[3].points[13].leftLinear = 0;curves[3].points[13].rightLinear = 0;
|
||||
curves[3].points[14].position = (Vector2) {0.940000, 0.365079};curves[3].points[14].tangents = (Vector2) {0,0};curves[3].points[14].leftLinear = 0;curves[3].points[14].rightLinear = 0;
|
||||
curves[3].points[15].position = (Vector2) {0.950000, 0.507937};curves[3].points[15].tangents = (Vector2) {0,0};curves[3].points[15].leftLinear = 0;curves[3].points[15].rightLinear = 0;
|
||||
|
||||
// Rotation
|
||||
|
||||
curves[4].start = -360;
|
||||
curves[4].end = 360;
|
||||
curves[4].numPoints = 9;
|
||||
curves[4].selectedIndex = 0;
|
||||
curves[4].editLeftTangent = false;
|
||||
curves[4].editRightTangent = false;
|
||||
curves[4].points[0].position = (Vector2) {0.140000, 0.500000};curves[4].points[0].tangents = (Vector2) {0,0};curves[4].points[0].leftLinear = 0;curves[4].points[0].rightLinear = 0;
|
||||
curves[4].points[1].position = (Vector2) {0.450000, 0.500000};curves[4].points[1].tangents = (Vector2) {0,0};curves[4].points[1].leftLinear = 0;curves[4].points[1].rightLinear = 0;
|
||||
curves[4].points[2].position = (Vector2) {0.670000, 0.500000};curves[4].points[2].tangents = (Vector2) {0,0};curves[4].points[2].leftLinear = 0;curves[4].points[2].rightLinear = 0;
|
||||
curves[4].points[3].position = (Vector2) {0.830000, 0.500000};curves[4].points[3].tangents = (Vector2) {0,0};curves[4].points[3].leftLinear = 0;curves[4].points[3].rightLinear = 0;
|
||||
curves[4].points[4].position = (Vector2) {0.940000, 0.500000};curves[4].points[4].tangents = (Vector2) {0,0};curves[4].points[4].leftLinear = 0;curves[4].points[4].rightLinear = 0;
|
||||
curves[4].points[5].position = (Vector2) {1.000000, 0.500000};curves[4].points[5].tangents = (Vector2) {0,0};curves[4].points[5].leftLinear = 0;curves[4].points[5].rightLinear = 0;
|
||||
curves[4].points[6].position = (Vector2) {0.000000, 0.472222};curves[4].points[6].tangents = (Vector2) {0,0};curves[4].points[6].leftLinear = 0;curves[4].points[6].rightLinear = 0;
|
||||
curves[4].points[7].position = (Vector2) {0.302752, 0.527778};curves[4].points[7].tangents = (Vector2) {0,0};curves[4].points[7].leftLinear = 0;curves[4].points[7].rightLinear = 0;
|
||||
curves[4].points[8].position = (Vector2) {0.577982, 0.472222};curves[4].points[8].tangents = (Vector2) {0,0};curves[4].points[8].leftLinear = 0;curves[4].points[8].rightLinear = 0;
|
||||
}
|
||||
|
||||
|
||||
517
examples/animation_curve/gui_curve_edit.h
Normal file
517
examples/animation_curve/gui_curve_edit.h
Normal file
@ -0,0 +1,517 @@
|
||||
/*******************************************************************************************
|
||||
*
|
||||
* CurveEdit v1.0 - A cubic Hermite editor for making animation curves
|
||||
*
|
||||
* MODULE USAGE:
|
||||
* #define GUI_CURVE_EDIT_IMPLEMENTATION
|
||||
* #include "gui_curve_edit.h"
|
||||
*
|
||||
* INIT: GuiCurveEditState state = InitCurveEdit();
|
||||
* EVALUATE: float y = state.start + (state.end-state.start) * EvalGuiCurve(&state, t); // 0 <= t <= 1
|
||||
* DRAW: BeginScissorMode(bounds.x,bounds.y,bounds.width,bounds.height);
|
||||
* GuiCurveEdit(&state, bounds, pointSize);
|
||||
* EndScissorMode();
|
||||
*
|
||||
* NOTE: See 'Module Structures Declaration' section for more informations.
|
||||
*
|
||||
* NOTE: This module uses functions of the stdlib:
|
||||
* - qsort
|
||||
*
|
||||
* NOTE: Built-in interactions:
|
||||
* - Left click to move/add point or move tangents
|
||||
* - While moving a tangent, hold (left/right) SHIFT to disable tangent symetry
|
||||
* - Right click to remove a point
|
||||
*
|
||||
*
|
||||
* LICENSE: zlib/libpng
|
||||
*
|
||||
* Copyright (c) 2023 Pierre Jaffuer (@smallcluster)
|
||||
*
|
||||
* This software is provided "as-is", without any express or implied warranty. In no event
|
||||
* will the authors be held liable for any damages arising from the use of this software.
|
||||
*
|
||||
* Permission is granted to anyone to use this software for any purpose, including commercial
|
||||
* applications, and to alter it and redistribute it freely, subject to the following restrictions:
|
||||
*
|
||||
* 1. The origin of this software must not be misrepresented; you must not claim that you
|
||||
* wrote the original software. If you use this software in a product, an acknowledgment
|
||||
* in the product documentation would be appreciated but is not required.
|
||||
*
|
||||
* 2. Altered source versions must be plainly marked as such, and must not be misrepresented
|
||||
* as being the original software.
|
||||
*
|
||||
* 3. This notice may not be removed or altered from any source distribution.
|
||||
*
|
||||
**********************************************************************************************/
|
||||
|
||||
#include "raylib.h"
|
||||
|
||||
#ifndef GUI_CURVE_EDIT_H
|
||||
#define GUI_CURVE_EDIT_H
|
||||
|
||||
|
||||
#ifndef GUI_CURVE_EDIT_MAX_POINTS
|
||||
#define GUI_CURVE_EDIT_MAX_POINTS 30
|
||||
#endif
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Module Structures Declaration
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
typedef struct {
|
||||
Vector2 position = (Vector2) {0,0}; // In normalized space [0.f, 1.f]
|
||||
Vector2 tangents = (Vector2) {0,0}; // The derivatives (left/right) of the 1D curve
|
||||
// Let the curve editor calculate tangents to linearize part of the curve
|
||||
bool leftLinear = false;
|
||||
bool rightLinear = false;
|
||||
} GuiCurveEditPoint;
|
||||
|
||||
typedef struct {
|
||||
float start = 0; // Value at y = 0
|
||||
float end = 1; // Value at y = 1
|
||||
// Always valid (unless you manualy change state's point array)
|
||||
int selectedIndex = -1; // -1 before Init
|
||||
// Unsorted array with at least one point (constant curve)
|
||||
GuiCurveEditPoint points[GUI_CURVE_EDIT_MAX_POINTS];
|
||||
int numPoints = 0;
|
||||
|
||||
// private part
|
||||
bool editLeftTangent = false;
|
||||
bool editRightTangent = false;
|
||||
Vector2 mouseOffset = (Vector2) {0,0};
|
||||
} GuiCurveEditState;
|
||||
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" { // Prevents name mangling of functions
|
||||
#endif
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Module Functions Declaration
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
// Initialize state
|
||||
GuiCurveEditState InitGuiCurveEdit();
|
||||
// Draw and update curve control
|
||||
void GuiCurveEdit(GuiCurveEditState *state, Rectangle bounds);
|
||||
|
||||
// 1D Interpolation
|
||||
// Returns the normalized y value of the curve at x = t
|
||||
// t must be normalized [0.f, 1.f]
|
||||
float EvalGuiCurve(GuiCurveEditState *state, float t);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif // GUI_CURVE_EDIT_H
|
||||
|
||||
/***********************************************************************************
|
||||
*
|
||||
* GUI_CURVE_EDIT IMPLEMENTATION
|
||||
*
|
||||
************************************************************************************/
|
||||
#if defined(GUI_CURVE_EDIT_IMPLEMENTATION)
|
||||
|
||||
#include "../../src/raygui.h" // Change this to fit your project
|
||||
|
||||
#include "stdlib.h" // Required for qsort
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// Module Functions Definition
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
GuiCurveEditState InitGuiCurveEdit()
|
||||
{
|
||||
GuiCurveEditState state;
|
||||
|
||||
state.start = 0;
|
||||
state.end = 1;
|
||||
state.selectedIndex = 0;
|
||||
state.editLeftTangent = false;
|
||||
state.editRightTangent = false;
|
||||
state.mouseOffset = (Vector2) {0.f,0.f};
|
||||
|
||||
// At least one point (AVG by default)
|
||||
state.numPoints = 1;
|
||||
state.points[0].position = (Vector2) {0.5f,0.5f};
|
||||
state.points[0].tangents = (Vector2) {0.f,0.f};
|
||||
state.points[0].leftLinear = false;
|
||||
state.points[0].rightLinear = false;
|
||||
|
||||
return state;
|
||||
}
|
||||
|
||||
int CompareGuiCurveEditPointPtr (const void * a, const void * b)
|
||||
{
|
||||
float fa = (*(GuiCurveEditPoint**)a)->position.x;
|
||||
float fb = (*(GuiCurveEditPoint**)b)->position.x;
|
||||
return (fa > fb) - (fa < fb);
|
||||
}
|
||||
|
||||
float EvalGuiCurve(GuiCurveEditState *state, float t){
|
||||
|
||||
// Sort points
|
||||
GuiCurveEditPoint* sortedPoints[GUI_CURVE_EDIT_MAX_POINTS];
|
||||
for(int i=0; i < state->numPoints; i++){
|
||||
sortedPoints[i] = &state->points[i];
|
||||
}
|
||||
qsort(sortedPoints, state->numPoints, sizeof(GuiCurveEditPoint*), CompareGuiCurveEditPointPtr);
|
||||
|
||||
if(state->numPoints == 0)
|
||||
return state->start;
|
||||
|
||||
// Constants part on edges
|
||||
if(t <= sortedPoints[0]->position.x)
|
||||
return state->start + (state->end-state->start) * sortedPoints[0]->position.y;
|
||||
if(t >= sortedPoints[state->numPoints-1]->position.x)
|
||||
return state->start + (state->end-state->start) * sortedPoints[state->numPoints-1]->position.y;
|
||||
|
||||
// Find curve portion
|
||||
for(int i=0; i < state->numPoints-1; i++){
|
||||
const GuiCurveEditPoint* p1 = sortedPoints[i];
|
||||
const GuiCurveEditPoint* p2 = sortedPoints[i+1];
|
||||
// Skip this range
|
||||
if(!(t >= p1->position.x && t < p2->position.x) || p1->position.x == p2->position.x)
|
||||
continue;
|
||||
float scale = (p2->position.x-p1->position.x);
|
||||
float T = (t-p1->position.x)/scale;
|
||||
float startTangent = scale * p1->tangents.y;
|
||||
float endTangent = scale * p2->tangents.x;
|
||||
float T2 = T*T;
|
||||
float T3 = T*T*T;
|
||||
return state->start + (state->end-state->start) * ((2*T3-3*T2+1)*p1->position.y+(T3-2*T2+T)*startTangent+(3*T2-2*T3)*p2->position.y+(T3-T2)*endTangent);
|
||||
}
|
||||
|
||||
return state->start;
|
||||
}
|
||||
|
||||
void GuiCurveEdit(GuiCurveEditState *state, Rectangle bounds){
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// CONST
|
||||
//----------------------------------------------------------------------------------
|
||||
const float pointSize = 10;
|
||||
const float fontSize = GuiGetStyle(DEFAULT, TEXT_SIZE);
|
||||
const float handleLength = pointSize*2.5;
|
||||
const float handleSize = pointSize/1.5f;
|
||||
|
||||
const Rectangle innerBounds = (Rectangle){bounds.x+fontSize, bounds.y+fontSize, bounds.width-2*fontSize, bounds.height-2*fontSize};
|
||||
const Vector2 mouse = GetMousePosition();
|
||||
const Vector2 mouseLocal = (Vector2) {(mouse.x-innerBounds.x)/innerBounds.width, (innerBounds.y+innerBounds.height-mouse.y)/innerBounds.height};
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// UPDATE STATE
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
// Find first point under mouse (-1 if not found)
|
||||
int hoveredPointIndex = -1;
|
||||
for(int i=0; i < state->numPoints; i++){
|
||||
const GuiCurveEditPoint* p = &state->points[i];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
const Rectangle pointRect = (Rectangle) {screenPos.x-pointSize/2.f, screenPos.y-pointSize/2.f, pointSize, pointSize};
|
||||
if(CheckCollisionPointRec(mouse, pointRect)){
|
||||
hoveredPointIndex = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
// Unselect tangents
|
||||
if(IsMouseButtonReleased(MOUSE_BUTTON_LEFT)){
|
||||
state->editLeftTangent = false;
|
||||
state->editRightTangent = false;
|
||||
}
|
||||
|
||||
// Select a tangent if possible
|
||||
if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT) && state->selectedIndex != -1 && CheckCollisionPointRec(mouse, bounds)){
|
||||
const GuiCurveEditPoint* p = &state->points[state->selectedIndex];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
|
||||
// Left control
|
||||
Vector2 target = (Vector2) {(p->position.x-1)*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-(p->position.y-p->tangents.x)*innerBounds.height};
|
||||
Vector2 dir = (Vector2) {target.x-screenPos.x, target.y-screenPos.y};
|
||||
float d = sqrt(dir.x*dir.x+dir.y*dir.y);
|
||||
Vector2 control = (Vector2) {screenPos.x+dir.x/d*handleLength, screenPos.y+dir.y/d*handleLength};
|
||||
Rectangle controlRect = (Rectangle) {control.x-handleSize/2.f, control.y-handleSize/2.f, handleSize, handleSize};
|
||||
|
||||
// Edit left tangent
|
||||
if(CheckCollisionPointRec(mouse, controlRect)){
|
||||
state->editLeftTangent = true;
|
||||
}
|
||||
|
||||
// Right control
|
||||
target = (Vector2) {(p->position.x+1)*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-(p->position.y+p->tangents.y)*innerBounds.height};
|
||||
dir = (Vector2) {target.x-screenPos.x, target.y-screenPos.y};
|
||||
d = sqrt(dir.x*dir.x+dir.y*dir.y);
|
||||
control = (Vector2) {screenPos.x+dir.x/d*handleLength, screenPos.y+dir.y/d*handleLength};
|
||||
controlRect = (Rectangle) {control.x-handleSize/2.f, control.y-handleSize/2.f, handleSize, handleSize};
|
||||
// Edit right tangent
|
||||
if(CheckCollisionPointRec(mouse, controlRect)){
|
||||
state->editRightTangent = true;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
// Move tangents
|
||||
if(IsMouseButtonDown(MOUSE_BUTTON_LEFT) && state->editRightTangent){
|
||||
// editRightTangent == true implies selectedIndex != -1
|
||||
GuiCurveEditPoint* p = &state->points[state->selectedIndex];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
const Vector2 dir = (Vector2){mouseLocal.x-p->position.x, mouseLocal.y-p->position.y};
|
||||
// Calculate right tangent slope
|
||||
p->tangents.y = dir.x < 0.001f ? dir.y/0.001f : dir.y/dir.x;
|
||||
p->rightLinear = false; // Stop right linearization update
|
||||
|
||||
// Tangents are symetric by default unless SHIFT is pressed
|
||||
if(!(IsKeyDown(KEY_LEFT_SHIFT) || IsKeyDown(KEY_RIGHT_SHIFT))){
|
||||
p->tangents.x = p->tangents.y;
|
||||
p->leftLinear = false; // Stop left linearization update
|
||||
}
|
||||
|
||||
} else if(IsMouseButtonDown(MOUSE_BUTTON_LEFT) && state->editLeftTangent){
|
||||
// editLeftTangent == true implies selectedIndex != -1
|
||||
GuiCurveEditPoint* p = &state->points[state->selectedIndex];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
const Vector2 dir = (Vector2){mouseLocal.x-p->position.x, mouseLocal.y-p->position.y};
|
||||
// Calculate left tangent slope
|
||||
p->tangents.x = dir.x > -0.001f ? dir.y/(-0.001f) : dir.y/dir.x;
|
||||
p->leftLinear = false; // Stop left linearization update
|
||||
|
||||
// Tangents are symetric by default unless SHIFT is pressed
|
||||
if(!(IsKeyDown(KEY_LEFT_SHIFT) || IsKeyDown(KEY_RIGHT_SHIFT))){
|
||||
p->tangents.y = p->tangents.x;
|
||||
p->rightLinear = false; // Stop right linearization update
|
||||
}
|
||||
}
|
||||
// Select a point
|
||||
else if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT) && hoveredPointIndex != -1 CheckCollisionPointRec(mouse, bounds)){
|
||||
state->selectedIndex = hoveredPointIndex;
|
||||
const GuiCurveEditPoint* p = &state->points[state->selectedIndex];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
state->mouseOffset = (Vector2) {p->position.x - mouseLocal.x, p->position.y - mouseLocal.y};
|
||||
}
|
||||
// Remove a point (check against bounds)
|
||||
else if(IsMouseButtonPressed(MOUSE_BUTTON_RIGHT) && hoveredPointIndex != -1 && CheckCollisionPointRec(mouse, bounds) && state->numPoints > 1){
|
||||
// Deselect everything
|
||||
state->selectedIndex = 0; // select first point by default
|
||||
state->editLeftTangent = false;
|
||||
state->editRightTangent = false;
|
||||
|
||||
// Remove point
|
||||
state->numPoints -= 1;
|
||||
for(int i=hoveredPointIndex; i < state->numPoints; i++ ){
|
||||
state->points[i] = state->points[i+1];
|
||||
}
|
||||
|
||||
// Add a point (check against innerBounds)
|
||||
} else if(IsMouseButtonPressed(MOUSE_BUTTON_LEFT) && CheckCollisionPointRec(mouse, innerBounds) && state->numPoints < GUI_CURVE_EDIT_MAX_POINTS){
|
||||
state->editLeftTangent = false;
|
||||
state->editRightTangent = false;
|
||||
|
||||
// Create new point
|
||||
GuiCurveEditPoint p;
|
||||
p.tangents = (Vector2) {0.f, 0.f};
|
||||
p.position = mouseLocal;
|
||||
p.leftLinear = false;
|
||||
p.rightLinear = false;
|
||||
// Append point
|
||||
state->points[state->numPoints] = p;
|
||||
state->selectedIndex = state->numPoints; // select new point
|
||||
state->numPoints += 1;
|
||||
// Point is add on mouse pos
|
||||
state->mouseOffset = (Vector2) {0,0};
|
||||
|
||||
// Move selected point
|
||||
} else if(state->selectedIndex != -1 && IsMouseButtonDown(MOUSE_BUTTON_LEFT) && CheckCollisionPointRec(mouse, bounds) ){
|
||||
GuiCurveEditPoint* p = &state->points[state->selectedIndex];
|
||||
|
||||
// use mouse offset on click to prevent point teleporting to mouse
|
||||
const Vector2 newLocalPos = (Vector2){mouseLocal.x + state->mouseOffset.x, mouseLocal.y + state->mouseOffset.y};
|
||||
|
||||
// Clamp to innerbounds
|
||||
p->position.x = newLocalPos.x < 0 ? 0 : newLocalPos.x > 1 ? 1 : newLocalPos.x;
|
||||
p->position.y = newLocalPos.y < 0 ? 0 : newLocalPos.y > 1 ? 1 : newLocalPos.y;
|
||||
}
|
||||
|
||||
// Sort points
|
||||
GuiCurveEditPoint* sortedPoints[GUI_CURVE_EDIT_MAX_POINTS];
|
||||
for(int i=0; i < state->numPoints; i++){
|
||||
sortedPoints[i] = &state->points[i];
|
||||
}
|
||||
qsort(sortedPoints, state->numPoints, sizeof(GuiCurveEditPoint*), CompareGuiCurveEditPointPtr);
|
||||
|
||||
|
||||
// Update linear tangents
|
||||
for(int i=0; i < state->numPoints; i++){
|
||||
GuiCurveEditPoint* p = sortedPoints[i];
|
||||
// Left tangent
|
||||
if(i > 0 && p->leftLinear){
|
||||
const GuiCurveEditPoint* p2 = sortedPoints[i-1];
|
||||
Vector2 dir = (Vector2) {p2->position.x-p->position.x, p2->position.y-p->position.y};
|
||||
p->tangents.x = dir.x == 0 ? 0 : dir.y/dir.x;
|
||||
}
|
||||
// Right tangent
|
||||
if(i < state->numPoints-1 && p->rightLinear){
|
||||
const GuiCurveEditPoint* p2 = sortedPoints[i+1];
|
||||
Vector2 dir = (Vector2) {p2->position.x-p->position.x, p2->position.y-p->position.y};
|
||||
p->tangents.y = dir.x == 0 ? 0 : dir.y/dir.x;
|
||||
}
|
||||
}
|
||||
|
||||
//----------------------------------------------------------------------------------
|
||||
// DRAWING
|
||||
//----------------------------------------------------------------------------------
|
||||
|
||||
// Draw bg
|
||||
DrawRectangle(bounds.x, bounds.y, bounds.width, bounds.height, GetColor(GuiGetStyle(DEFAULT, BACKGROUND_COLOR)));
|
||||
|
||||
// Draw grid
|
||||
// H lines
|
||||
const Color lineColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
DrawLine(bounds.x, innerBounds.y, bounds.x+bounds.width, innerBounds.y, lineColor); // end
|
||||
DrawLine(bounds.x, innerBounds.y+innerBounds.height/2, bounds.x+bounds.width, innerBounds.y+innerBounds.height/2, lineColor); // avg
|
||||
DrawLine(bounds.x, innerBounds.y+innerBounds.height, bounds.x+bounds.width, innerBounds.y+innerBounds.height, lineColor); // start
|
||||
|
||||
// V lines
|
||||
DrawLine(innerBounds.x, bounds.y, innerBounds.x, bounds.y+bounds.height, lineColor); // 0
|
||||
DrawLine(innerBounds.x+innerBounds.width/4, bounds.y, innerBounds.x+innerBounds.width/4, bounds.y+bounds.height, lineColor); // 0.25
|
||||
DrawLine(innerBounds.x+innerBounds.width/2, bounds.y, innerBounds.x+innerBounds.width/2, bounds.y+bounds.height, lineColor); // 0.5
|
||||
DrawLine(innerBounds.x+3*innerBounds.width/4, bounds.y, innerBounds.x+3*innerBounds.width/4, bounds.y+bounds.height, lineColor); // 0.75
|
||||
DrawLine(innerBounds.x+innerBounds.width, bounds.y, innerBounds.x+innerBounds.width, bounds.y+bounds.height, lineColor); // 1
|
||||
|
||||
Font font = GuiGetFont();
|
||||
// V labels
|
||||
DrawTextEx(font, "0", (Vector2) {innerBounds.x, bounds.y+bounds.height-fontSize}, fontSize,GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, "0.25", (Vector2) {innerBounds.x+innerBounds.width/4.f, bounds.y+bounds.height-fontSize}, fontSize,GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, "0.5", (Vector2) {innerBounds.x+innerBounds.width/2.f, bounds.y+bounds.height-fontSize}, fontSize,GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, "0.75", (Vector2) {innerBounds.x+3.f*innerBounds.width/4.f, bounds.y+bounds.height-fontSize}, fontSize,GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, "1", (Vector2) {innerBounds.x+innerBounds.width, bounds.y+bounds.height-fontSize}, fontSize,GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
|
||||
// H labels
|
||||
DrawTextEx(font, TextFormat("%.2f", state->start), (Vector2) {innerBounds.x, innerBounds.y-fontSize+innerBounds.height}, fontSize, GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, TextFormat("%.2f", state->start + (state->end-state->start)/2.f), (Vector2) {innerBounds.x, innerBounds.y-fontSize+innerBounds.height/2.f}, fontSize, GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
DrawTextEx(font, TextFormat("%.2f", state->end), (Vector2) {innerBounds.x, innerBounds.y}, fontSize, GuiGetStyle(DEFAULT, TEXT_SPACING), lineColor);
|
||||
|
||||
// Draw contours
|
||||
if(CheckCollisionPointRec(mouse, bounds))
|
||||
DrawRectangleLines(bounds.x, bounds.y, bounds.width, bounds.height, GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_FOCUSED)));
|
||||
else
|
||||
DrawRectangleLines(bounds.x, bounds.y, bounds.width, bounds.height, GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL)));
|
||||
|
||||
// Draw points
|
||||
for(int i=0; i < state->numPoints; i++){
|
||||
|
||||
const GuiCurveEditPoint* p = sortedPoints[i];
|
||||
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
const Rectangle pointRect = (Rectangle) {screenPos.x-pointSize/2.f, screenPos.y-pointSize/2.f, pointSize, pointSize};
|
||||
|
||||
Color pointColor;
|
||||
Color pointBorderColor;
|
||||
|
||||
// Draw point
|
||||
if(&state->points[state->selectedIndex] == p){
|
||||
|
||||
// Draw left handle
|
||||
if(i > 0){
|
||||
const Vector2 target = (Vector2) {(p->position.x-1)*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-(p->position.y-p->tangents.x)*innerBounds.height};
|
||||
const Vector2 dir = (Vector2) {target.x-screenPos.x, target.y-screenPos.y};
|
||||
const float d = sqrt(dir.x*dir.x+dir.y*dir.y);
|
||||
const Vector2 control = (Vector2) {screenPos.x+dir.x/d*handleLength, screenPos.y+dir.y/d*handleLength};
|
||||
const Rectangle controlRect = (Rectangle) {control.x-handleSize/2.f, control.y-handleSize/2.f, handleSize, handleSize};
|
||||
|
||||
Color controlColor;
|
||||
Color controlBorderColor;
|
||||
if(state->editLeftTangent){
|
||||
controlColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_PRESSED));
|
||||
controlBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
} else if(CheckCollisionPointRec(mouse, controlRect)){
|
||||
controlColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_FOCUSED));
|
||||
controlBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
}else{
|
||||
controlColor = GetColor(GuiGetStyle(BUTTON, BASE_COLOR_NORMAL));
|
||||
controlBorderColor = GetColor(GuiGetStyle(BUTTON, BORDER_COLOR_NORMAL));
|
||||
}
|
||||
DrawLine(screenPos.x,screenPos.y, control.x, control.y, controlColor);
|
||||
DrawRectangle(controlRect.x, controlRect.y, controlRect.width, controlRect.height, controlColor);
|
||||
DrawRectangleLines(controlRect.x, controlRect.y, controlRect.width, controlRect.height, controlColor);
|
||||
}
|
||||
// Draw right handle
|
||||
if(i < state->numPoints-1){
|
||||
const Vector2 target = (Vector2) {(p->position.x+1)*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-(p->position.y+p->tangents.y)*innerBounds.height};
|
||||
const Vector2 dir = (Vector2) {target.x-screenPos.x, target.y-screenPos.y};
|
||||
const float d = sqrt(dir.x*dir.x+dir.y*dir.y);
|
||||
const Vector2 control = (Vector2) {screenPos.x+dir.x/d*handleLength, screenPos.y+dir.y/d*handleLength};
|
||||
const Rectangle controlRect = (Rectangle) {control.x-handleSize/2.f, control.y-handleSize/2.f, handleSize, handleSize};
|
||||
|
||||
Color controlColor;
|
||||
Color controlBorderColor;
|
||||
if(state->editRightTangent){
|
||||
controlColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_PRESSED));
|
||||
controlBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
} else if(CheckCollisionPointRec(mouse, controlRect)){
|
||||
controlColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_FOCUSED));
|
||||
controlBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
}else{
|
||||
controlColor = GetColor(GuiGetStyle(BUTTON, BASE_COLOR_NORMAL));
|
||||
controlBorderColor = GetColor(GuiGetStyle(BUTTON, BORDER_COLOR_NORMAL));
|
||||
}
|
||||
DrawLine(screenPos.x,screenPos.y, control.x, control.y, controlColor);
|
||||
DrawRectangle(controlRect.x, controlRect.y, controlRect.width, controlRect.height, controlColor);
|
||||
DrawRectangleLines(controlRect.x, controlRect.y, controlRect.width, controlRect.height, controlColor);
|
||||
}
|
||||
|
||||
pointColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_PRESSED));
|
||||
pointBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
|
||||
} else if(&state->points[hoveredPointIndex] == p) {
|
||||
pointColor = GetColor(GuiGetStyle(DEFAULT, BASE_COLOR_FOCUSED));
|
||||
pointBorderColor = GetColor(GuiGetStyle(DEFAULT, BORDER_COLOR_NORMAL));
|
||||
} else {
|
||||
pointColor = GetColor(GuiGetStyle(BUTTON, BASE_COLOR_NORMAL));
|
||||
pointBorderColor = GetColor(GuiGetStyle(BUTTON, BORDER_COLOR_NORMAL));
|
||||
}
|
||||
|
||||
DrawRectangle(pointRect.x, pointRect.y, pointRect.width, pointRect.height, pointColor);
|
||||
DrawRectangleLines(pointRect.x, pointRect.y, pointRect.width, pointRect.height, pointBorderColor);
|
||||
|
||||
}
|
||||
|
||||
// Draw curve
|
||||
Color curveColor = GetColor(GuiGetStyle(LABEL, TEXT_COLOR_FOCUSED));
|
||||
if(state->numPoints == 1){
|
||||
const GuiCurveEditPoint* p = sortedPoints[0];
|
||||
const Vector2 screenPos = (Vector2){p->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p->position.y*innerBounds.height};
|
||||
DrawLine(innerBounds.x, screenPos.y, innerBounds.x+innerBounds.width, screenPos.y, curveColor);
|
||||
}else {
|
||||
for(int i=0; i < state->numPoints-1; i++){
|
||||
const GuiCurveEditPoint* p1 = sortedPoints[i];
|
||||
const GuiCurveEditPoint* p2 = sortedPoints[i+1];
|
||||
const Vector2 screenPos1 = (Vector2){p1->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p1->position.y*innerBounds.height};
|
||||
const Vector2 screenPos2 = (Vector2){p2->position.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-p2->position.y*innerBounds.height};
|
||||
// Constant on edge
|
||||
if(screenPos1.x > innerBounds.x && i == 0){
|
||||
DrawLine(innerBounds.x, screenPos1.y, screenPos1.x, screenPos1.y, curveColor);
|
||||
}
|
||||
if(screenPos2.x < innerBounds.x+innerBounds.width && i == (state->numPoints-2)){
|
||||
DrawLine(screenPos2.x, screenPos2.y, innerBounds.x+innerBounds.width, screenPos2.y, curveColor);
|
||||
}
|
||||
// Draw cubic Hermite curve
|
||||
const float scale = (p2->position.x-p1->position.x)/3.f;
|
||||
const Vector2 offset1 = (Vector2) {scale, scale*p1->tangents.y};
|
||||
// negative endTangent => top part => need to invert value to calculate offset
|
||||
const Vector2 offset2 = (Vector2) {-scale, -scale*p2->tangents.x};
|
||||
|
||||
const Vector2 c1 = (Vector2) {p1->position.x+offset1.x, p1->position.y+offset1.y};
|
||||
const Vector2 c2 = (Vector2) {p2->position.x+offset2.x, p2->position.y+offset2.y};
|
||||
|
||||
const Vector2 screenC1 = (Vector2) {c1.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-c1.y*innerBounds.height};
|
||||
const Vector2 screenC2 = (Vector2) {c2.x*innerBounds.width+innerBounds.x, innerBounds.y+innerBounds.height-c2.y*innerBounds.height};
|
||||
|
||||
DrawLineBezierCubic(screenPos1, screenPos2, screenC1, screenC2, 1, curveColor);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif // GUI_CURVE_EDIT_IMPLEMENTATION
|
||||
|
||||
Reference in New Issue
Block a user