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REVIEWED: Shaders formating to follow raylib code conventions

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Ray
2025-08-11 20:22:31 +02:00
parent 8dae39fbda
commit 9b598f6bcf
62 changed files with 797 additions and 797 deletions
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178
examples/shaders/resources/shaders/glsl100/hybrid_raymarch.fs
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@ -1,9 +1,9 @@
#version 100
#version 100
#extension GL_EXT_frag_depth : enable //Extension required for writing depth
#extension GL_OES_standard_derivatives : enable //Extension used for fwidth()
precision mediump float; // Precision required for OpenGL ES2 (WebGL)
// Input vertex attributes (from vertex shader)
varying vec2 fragTexCoord;
varying vec4 fragColor;
@ -19,21 +19,22 @@ uniform vec2 screenCenter;
#define ZERO 0
// https://learnopengl.com/Advanced-OpenGL/Depth-testing
float CalcDepth(in vec3 rd, in float Idist){
// SRC: https://learnopengl.com/Advanced-OpenGL/Depth-testing
float CalcDepth(in vec3 rd, in float Idist)
{
float local_z = dot(normalize(camDir),rd)*Idist;
return (1.0/(local_z) - 1.0/0.01)/(1.0/1000.0 -1.0/0.01);
}
// https://iquilezles.org/articles/distfunctions/
float sdHorseshoe( in vec3 p, in vec2 c, in float r, in float le, vec2 w )
// SRC: https://iquilezles.org/articles/distfunctions/
float sdHorseshoe(in vec3 p, in vec2 c, in float r, in float le, vec2 w)
{
p.x = abs(p.x);
float l = length(p.xy);
p.xy = mat2(-c.x, c.y,
c.y, c.x)*p.xy;
p.xy = vec2((p.y>0.0 || p.x>0.0)?p.x:l*sign(-c.x),
(p.x>0.0)?p.y:l );
(p.x>0.0)?p.y:l);
p.xy = vec2(p.x,abs(p.y-r))-vec2(le,0.0);
vec2 q = vec2(length(max(p.xy,0.0)) + min(0.0,max(p.x,p.y)),p.z);
@ -44,67 +45,70 @@ float sdHorseshoe( in vec3 p, in vec2 c, in float r, in float le, vec2 w )
// r = sphere's radius
// h = cutting's plane's position
// t = thickness
float sdSixWayCutHollowSphere( vec3 p, float r, float h, float t )
float sdSixWayCutHollowSphere(vec3 p, float r, float h, float t)
{
// Six way symetry Transformation
vec3 ap = abs(p);
if(ap.x < max(ap.y, ap.z)){
if(ap.y < ap.z) ap.xz = ap.zx;
if (ap.x < max(ap.y, ap.z)){
if (ap.y < ap.z) ap.xz = ap.zx;
else ap.xy = ap.yx;
}
vec2 q = vec2( length(ap.yz), ap.x );
vec2 q = vec2(length(ap.yz), ap.x);
float w = sqrt(r*r-h*h);
return ((h*q.x<w*q.y) ? length(q-vec2(w,h)) :
abs(length(q)-r) ) - t;
return ((h*q.x<w*q.y) ? length(q-vec2(w,h)) : abs(length(q)-r)) - t;
}
// https://iquilezles.org/articles/boxfunctions
vec2 iBox( in vec3 ro, in vec3 rd, in vec3 rad )
// SRC: https://iquilezles.org/articles/boxfunctions
vec2 iBox(in vec3 ro, in vec3 rd, in vec3 rad)
{
vec3 m = 1.0/rd;
vec3 n = m*ro;
vec3 k = abs(m)*rad;
vec3 t1 = -n - k;
vec3 t2 = -n + k;
return vec2( max( max( t1.x, t1.y ), t1.z ),
min( min( t2.x, t2.y ), t2.z ) );
return vec2(max(max(t1.x, t1.y), t1.z),
min(min(t2.x, t2.y), t2.z));
}
vec2 opU( vec2 d1, vec2 d2 )
vec2 opU(vec2 d1, vec2 d2)
{
return (d1.x<d2.x) ? d1 : d2;
return (d1.x<d2.x) ? d1 : d2;
}
vec2 map( in vec3 pos ){
vec2 res = vec2( sdHorseshoe( pos-vec3(-1.0,0.08, 1.0), vec2(cos(1.3),sin(1.3)), 0.2, 0.3, vec2(0.03,0.5) ), 11.5 ) ;
res = opU(res, vec2( sdSixWayCutHollowSphere( pos-vec3(0.0, 1.0, 0.0), 4.0, 3.5, 0.5 ), 4.5 )) ;
vec2 map(in vec3 pos)
{
vec2 res = vec2(sdHorseshoe(pos-vec3(-1.0,0.08, 1.0), vec2(cos(1.3),sin(1.3)), 0.2, 0.3, vec2(0.03,0.5)), 11.5) ;
res = opU(res, vec2(sdSixWayCutHollowSphere(pos-vec3(0.0, 1.0, 0.0), 4.0, 3.5, 0.5), 4.5)) ;
return res;
}
// https://www.shadertoy.com/view/Xds3zN
vec2 raycast( in vec3 ro, in vec3 rd ){
// SRC: https://www.shadertoy.com/view/Xds3zN
vec2 raycast(in vec3 ro, in vec3 rd)
{
vec2 res = vec2(-1.0,-1.0);
float tmin = 1.0;
float tmax = 20.0;
// raytrace floor plane
// Raytrace floor plane
float tp1 = (-ro.y)/rd.y;
if( tp1>0.0 )
if (tp1>0.0)
{
tmax = min( tmax, tp1 );
res = vec2( tp1, 1.0 );
tmax = min(tmax, tp1);
res = vec2(tp1, 1.0);
}
float t = tmin;
for( int i=0; i<70 ; i++ )
for (int i=0; i<70 ; i++)
{
if(t>tmax) break;
vec2 h = map( ro+rd*t );
if( abs(h.x)<(0.0001*t) )
if (t>tmax) break;
vec2 h = map(ro+rd*t);
if (abs(h.x) < (0.0001*t))
{
res = vec2(t,h.y);
break;
@ -117,54 +121,54 @@ vec2 raycast( in vec3 ro, in vec3 rd ){
// https://iquilezles.org/articles/rmshadows
float calcSoftshadow( in vec3 ro, in vec3 rd, in float mint, in float tmax )
float calcSoftshadow(in vec3 ro, in vec3 rd, in float mint, in float tmax)
{
// bounding volume
float tp = (0.8-ro.y)/rd.y; if( tp>0.0 ) tmax = min( tmax, tp );
float tp = (0.8-ro.y)/rd.y; if (tp>0.0) tmax = min(tmax, tp);
float res = 1.0;
float t = mint;
for( int i=ZERO; i<24; i++ )
for (int i=ZERO; i<24; i++)
{
float h = map( ro + rd*t ).x;
float h = map(ro + rd*t).x;
float s = clamp(8.0*h/t,0.0,1.0);
res = min( res, s );
t += clamp( h, 0.01, 0.2 );
if( res<0.004 || t>tmax ) break;
res = min(res, s);
t += clamp(h, 0.01, 0.2);
if (res<0.004 || t>tmax) break;
}
res = clamp( res, 0.0, 1.0 );
res = clamp(res, 0.0, 1.0);
return res*res*(3.0-2.0*res);
}
// https://iquilezles.org/articles/normalsSDF
vec3 calcNormal( in vec3 pos )
vec3 calcNormal(in vec3 pos)
{
vec2 e = vec2(1.0,-1.0)*0.5773*0.0005;
return normalize( e.xyy*map( pos + e.xyy ).x +
e.yyx*map( pos + e.yyx ).x +
e.yxy*map( pos + e.yxy ).x +
e.xxx*map( pos + e.xxx ).x );
return normalize(e.xyy*map(pos + e.xyy).x +
e.yyx*map(pos + e.yyx).x +
e.yxy*map(pos + e.yxy).x +
e.xxx*map(pos + e.xxx).x);
}
// https://iquilezles.org/articles/nvscene2008/rwwtt.pdf
float calcAO( in vec3 pos, in vec3 nor )
float calcAO(in vec3 pos, in vec3 nor)
{
float occ = 0.0;
float occ = 0.0;
float sca = 1.0;
for( int i=ZERO; i<5; i++ )
for (int i=ZERO; i<5; i++)
{
float h = 0.01 + 0.12*float(i)/4.0;
float d = map( pos + h*nor ).x;
float d = map(pos + h*nor).x;
occ += (h-d)*sca;
sca *= 0.95;
if( occ>0.35 ) break;
if (occ>0.35) break;
}
return clamp( 1.0 - 3.0*occ, 0.0, 1.0 ) * (0.5+0.5*nor.y);
return clamp(1.0 - 3.0*occ, 0.0, 1.0)*(0.5+0.5*nor.y);
}
// https://iquilezles.org/articles/checkerfiltering
float checkersGradBox( in vec2 p )
float checkersGradBox(in vec2 p)
{
// filter kernel
vec2 w = fwidth(p) + 0.001;
@ -175,7 +179,7 @@ float checkersGradBox( in vec2 p )
}
// https://www.shadertoy.com/view/tdS3DG
vec4 render( in vec3 ro, in vec3 rd)
vec4 render(in vec3 ro, in vec3 rd)
{
// background
vec3 col = vec3(0.7, 0.7, 0.9) - max(rd.y,0.0)*0.3;
@ -183,37 +187,37 @@ vec4 render( in vec3 ro, in vec3 rd)
// raycast scene
vec2 res = raycast(ro,rd);
float t = res.x;
float m = res.y;
if( m>-0.5 )
float m = res.y;
if (m>-0.5)
{
vec3 pos = ro + t*rd;
vec3 nor = (m<1.5) ? vec3(0.0,1.0,0.0) : calcNormal( pos );
vec3 ref = reflect( rd, nor );
vec3 nor = (m<1.5) ? vec3(0.0,1.0,0.0) : calcNormal(pos);
vec3 ref = reflect(rd, nor);
// material
col = 0.2 + 0.2*sin( m*2.0 + vec3(0.0,1.0,2.0) );
col = 0.2 + 0.2*sin(m*2.0 + vec3(0.0,1.0,2.0));
float ks = 1.0;
if( m<1.5 )
if (m<1.5)
{
float f = checkersGradBox( 3.0*pos.xz);
float f = checkersGradBox(3.0*pos.xz);
col = 0.15 + f*vec3(0.05);
ks = 0.4;
}
// lighting
float occ = calcAO( pos, nor );
float occ = calcAO(pos, nor);
vec3 lin = vec3(0.0);
vec3 lin = vec3(0.0);
// sun
{
vec3 lig = normalize( vec3(-0.5, 0.4, -0.6) );
vec3 hal = normalize( lig-rd );
float dif = clamp( dot( nor, lig ), 0.0, 1.0 );
//if( dif>0.0001 )
dif *= calcSoftshadow( pos, lig, 0.02, 2.5 );
float spe = pow( clamp( dot( nor, hal ), 0.0, 1.0 ),16.0);
vec3 lig = normalize(vec3(-0.5, 0.4, -0.6));
vec3 hal = normalize(lig-rd);
float dif = clamp(dot(nor, lig), 0.0, 1.0);
//if (dif>0.0001)
dif *= calcSoftshadow(pos, lig, 0.02, 2.5);
float spe = pow(clamp(dot(nor, hal), 0.0, 1.0),16.0);
spe *= dif;
spe *= 0.04+0.96*pow(clamp(1.0-dot(hal,lig),0.0,1.0),5.0);
//spe *= 0.04+0.96*pow(clamp(1.0-sqrt(0.5*(1.0-dot(rd,lig))),0.0,1.0),5.0);
@ -222,35 +226,35 @@ vec4 render( in vec3 ro, in vec3 rd)
}
// sky
{
float dif = sqrt(clamp( 0.5+0.5*nor.y, 0.0, 1.0 ));
float dif = sqrt(clamp(0.5+0.5*nor.y, 0.0, 1.0));
dif *= occ;
float spe = smoothstep( -0.2, 0.2, ref.y );
float spe = smoothstep(-0.2, 0.2, ref.y);
spe *= dif;
spe *= 0.04+0.96*pow(clamp(1.0+dot(nor,rd),0.0,1.0), 5.0 );
//if( spe>0.001 )
spe *= calcSoftshadow( pos, ref, 0.02, 2.5 );
spe *= 0.04+0.96*pow(clamp(1.0+dot(nor,rd),0.0,1.0), 5.0);
//if (spe>0.001)
spe *= calcSoftshadow(pos, ref, 0.02, 2.5);
lin += col*0.60*dif*vec3(0.40,0.60,1.15);
lin += 2.00*spe*vec3(0.40,0.60,1.30)*ks;
}
// back
{
float dif = clamp( dot( nor, normalize(vec3(0.5,0.0,0.6))), 0.0, 1.0 )*clamp( 1.0-pos.y,0.0,1.0);
float dif = clamp(dot(nor, normalize(vec3(0.5,0.0,0.6))), 0.0, 1.0)*clamp(1.0-pos.y,0.0,1.0);
dif *= occ;
lin += col*0.55*dif*vec3(0.25,0.25,0.25);
lin += col*0.55*dif*vec3(0.25,0.25,0.25);
}
// sss
{
float dif = pow(clamp(1.0+dot(nor,rd),0.0,1.0),2.0);
dif *= occ;
lin += col*0.25*dif*vec3(1.00,1.00,1.00);
lin += col*0.25*dif*vec3(1.00,1.00,1.00);
}
col = lin;
col = lin;
col = mix( col, vec3(0.7,0.7,0.9), 1.0-exp( -0.0001*t*t*t ) );
col = mix(col, vec3(0.7,0.7,0.9), 1.0-exp(-0.0001*t*t*t));
}
return vec4(vec3( clamp(col,0.0,1.0) ),t);
return vec4(vec3(clamp(col,0.0,1.0)),t);
}
vec3 CalcRayDir(vec2 nCoord){
@ -261,11 +265,11 @@ vec3 CalcRayDir(vec2 nCoord){
mat3 setCamera()
{
vec3 cw = normalize(camDir);
vec3 cp = vec3(0.0, 1.0 ,0.0);
vec3 cu = normalize( cross(cw,cp) );
vec3 cv = ( cross(cu,cw) );
return mat3( cu, cv, cw );
vec3 cw = normalize(camDir);
vec3 cp = vec3(0.0, 1.0 ,0.0);
vec3 cu = normalize(cross(cw,cp));
vec3 cv = (cross(cu,cw));
return mat3(cu, cv, cw);
}
void main()
@ -275,14 +279,14 @@ void main()
// focal length
float fl = length(camDir);
vec3 rd = ca * normalize( vec3(nCoord,fl) );
vec3 rd = ca*normalize(vec3(nCoord,fl));
vec3 color = vec3(nCoord/2.0 + 0.5, 0.0);
float depth = gl_FragCoord.z;
{
vec4 res = render( camPos - vec3(0.0, 0.0, 0.0) , rd );
vec4 res = render(camPos - vec3(0.0, 0.0, 0.0) , rd);
color = res.xyz;
depth = CalcDepth(rd,res.w);
}
gl_FragColor = vec4(color , 1.0);
gl_FragDepthEXT = depth;
gl_FragDepthEXT = depth;
}