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Reviewed example

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Ray
2025-10-17 17:09:55 +02:00
parent 7995f8d1b3
commit cd0d693a56
2 changed files with 12 additions and 16 deletions
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2
examples/examples_list.txt
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@ -79,7 +79,7 @@ shapes;shapes_vector_angle;★★☆☆;1.0;5.0;2023;2025;"Ramon Santamaria";@ra
shapes;shapes_pie_chart;★★★☆;5.5;5.6;2025;2025;"Gideon Serfontein";@GideonSerf
shapes;shapes_kaleidoscope;★★☆☆;5.5;5.6;2025;2025;"Hugo ARNAL";@hugoarnal
shapes;shapes_clock_of_clocks;★★☆☆;5.5;5.6-dev;2025;2025;"JP Mortiboys";@themushroompirates
shapes;shapes_mouse_trail;★☆☆☆;5.6;5.6-dev;2024;2024;"[Balamurugan R]";@[Bala050814]
shapes;shapes_mouse_trail;★☆☆☆;5.6;5.6-dev;2025;2025;"Balamurugan R";@Bala050814
shapes;shapes_simple_particles;★★☆☆;5.6;5.6;2025;2025;"Jordi Santonja";@JordSant
shapes;shapes_starfield_effect;★★☆☆;5.5;5.6-dev;2025;2025;"JP Mortiboys";@themushroompirates
textures;textures_logo_raylib;★☆☆☆;1.0;1.0;2014;2025;"Ramon Santamaria";@raysan5

26
examples/shapes/shapes_mouse_trail.c
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@ -6,16 +6,17 @@
*
* Example originally created with raylib 5.6
*
* Example contributed by [Balamurugan R] (@[Bala050814]]) and reviewed by [Ray] (@raysan5)
* Example contributed by Balamurugan R (@Bala050814]) and reviewed by Ramon Santamaria (@raysan5)
*
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
* BSD-like license that allows static linking with closed source software
*
* Copyright (c) 2024 [Balamurugan R] (@[Bala050814])
* Copyright (c) 2025 Balamurugan R (@Bala050814)
*
********************************************************************************************/
#include "raylib.h"
#include "raymath.h"
// Define the maximum number of positions to store in the trail
@ -46,14 +47,14 @@ int main(void)
//----------------------------------------------------------------------------------
Vector2 mousePosition = GetMousePosition();
// 1. Shift all existing positions backward by one slot in the array
// The last element (the oldest position) is dropped.
// Shift all existing positions backward by one slot in the array
// The last element (the oldest position) is dropped
for (int i = MAX_TRAIL_LENGTH - 1; i > 0; i--)
{
trailPositions[i] = trailPositions[i - 1];
}
// 2. Store the new, current mouse position at the start of the array (Index 0)
// Store the new, current mouse position at the start of the array (Index 0)
trailPositions[0] = mousePosition;
//----------------------------------------------------------------------------------
@ -61,24 +62,23 @@ int main(void)
//----------------------------------------------------------------------------------
BeginDrawing();
// Use BLACK for a darker background to make the colored trail pop
ClearBackground(BLACK);
// 3. Draw the trail by looping through the history array
// Draw the trail by looping through the history array
for (int i = 0; i < MAX_TRAIL_LENGTH; i++)
{
// Ensure we skip drawing if the array hasn't been fully filled on startup
if (trailPositions[i].x != 0.0f || trailPositions[i].y != 0.0f)
if ((trailPositions[i].x != 0.0f) || (trailPositions[i].y != 0.0f))
{
// Calculate relative trail strength (ratio is near 1.0 for new, near 0.0 for old)
float ratio = (float)(MAX_TRAIL_LENGTH - i) / MAX_TRAIL_LENGTH;
// Fade effect: oldest positions are more transparent
// Fade (color, alpha) - alpha is 0.5 to 1.0 based on ratio
Color trailColor = Fade(SKYBLUE, ratio * 0.5f + 0.5f);
Color trailColor = Fade(SKYBLUE, ratio*0.5f + 0.5f);
// Size effect: oldest positions are smaller
float trailRadius = 15.0f * ratio;
float trailRadius = 15.0f*ratio;
DrawCircleV(trailPositions[i], trailRadius, trailColor);
}
@ -87,8 +87,7 @@ int main(void)
// Draw a distinct white circle for the current mouse position (Index 0)
DrawCircleV(mousePosition, 15.0f, WHITE);
DrawText("Move the mouse to see the trail effect!",
10, screenHeight - 30, 20, LIGHTGRAY);
DrawText("Move the mouse to see the trail effect!", 10, screenHeight - 30, 20, LIGHTGRAY);
EndDrawing();
//----------------------------------------------------------------------------------
@ -96,9 +95,6 @@ int main(void)
// De-Initialization
//--------------------------------------------------------------------------------------
// No resources loaded, nothing to unload.
CloseWindow(); // Close window and OpenGL context
//--------------------------------------------------------------------------------------