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Update mudlord-emeraldenvy4.slang

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rz5 2016-09-28 22:12:43 +01:00 committed by GitHub
parent 91a3e4d8d9
commit 0edde43422
1 changed files with 72 additions and 63 deletions
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19
procedural/mudlord-emeraldenvy4.slang
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@ -13,6 +13,7 @@ layout(location = 0) in vec4 Position;
layout(location = 1) in vec2 TexCoord; layout(location = 1) in vec2 TexCoord;
layout(location = 0) out vec2 vTexCoord; layout(location = 0) out vec2 vTexCoord;
const vec2 madd = vec2(0.5, 0.5); const vec2 madd = vec2(0.5, 0.5);
void main() void main()
{ {
gl_Position = global.MVP * Position; gl_Position = global.MVP * Position;
@ -39,7 +40,6 @@ vec2 rotate(vec2 k,float t)
return vec2(cos(t)*k.x-sin(t)*k.y, sin(t)*k.x+cos(t)*k.y); return vec2(cos(t)*k.x-sin(t)*k.y, sin(t)*k.x+cos(t)*k.y);
} }
float scene(vec3 p) float scene(vec3 p)
{ {
float ball_p = 0.25; float ball_p = 0.25;
@ -51,26 +51,30 @@ float scene(vec3 p)
float pipe_w = pipe_p*0.42;//-0.00375*sync; float pipe_w = pipe_p*0.42;//-0.00375*sync;
float pipe_y = length(max(abs(mod(p.xy,pipe_p)-pipe_p*0.5)-pipe_w,0.0)); float pipe_y = length(max(abs(mod(p.xy,pipe_p)-pipe_p*0.5)-pipe_w,0.0));
float pipe_z = length(max(abs(mod(p.xz,pipe_p)-pipe_p*0.5)-pipe_w,0.0)); float pipe_z = length(max(abs(mod(p.xz,pipe_p)-pipe_p*0.5)-pipe_w,0.0));
return max(max(ball,-hole),max(pipe_y,max(pipe_y,pipe_z))); return max(max(ball,-hole),max(pipe_y,max(pipe_y,pipe_z)));
} }
vec3 getNormal(vec3 pos) vec3 getNormal(vec3 pos)
{ vec3 e = vec3(0.0,0.0001,0.0); {
return normalize(vec3( scene(pos+e.yxx)-scene(pos-e.yxx),scene(pos+e.xyx)-scene(pos-e.xyx),scene(pos+e.xxy)-scene(pos-e.xxy) ) ); vec3 e = vec3(0.0, 0.0001, 0.0);
return normalize(vec3(scene(pos+e.yxx) - scene(pos-e.yxx),
scene(pos+e.xyx) - scene(pos-e.xyx),
scene(pos+e.xxy) - scene(pos-e.xxy)));
} }
float render_scene(vec3 ray_origin, vec3 ray_dir,float t) float render_scene(vec3 ray_origin, vec3 ray_dir,float t)
{ {
const int ray_n=96; const int ray_n=96;
for(int i = 0; i<ray_n; i++) for(int i = 0; i<ray_n; i++)
{ {
float k = scene(ray_origin+ray_dir*t); float k = scene(ray_origin+ray_dir*t);
t += k*fade; t += k*fade;
} }
return t; return t;
} }
void main(void) void main(void)
{ {
vec2 FragCoord = vTexCoord.xy*global.OutputSize.xy; vec2 FragCoord = vTexCoord.xy*global.OutputSize.xy;
@ -78,6 +82,7 @@ void main(void)
vec2 position = (FragCoord.xy/resolution.xy); vec2 position = (FragCoord.xy/resolution.xy);
vec2 p = -1.0+2.0*position; vec2 p = -1.0+2.0*position;
//set up camera //set up camera
float speed = time*0.5; float speed = time*0.5;
vec3 dir = normalize(vec3(p*vec2(1.0,1.0),1.)); vec3 dir = normalize(vec3(p*vec2(1.0,1.0),1.));
@ -85,13 +90,16 @@ void main(void)
dir.zx = rotate(dir.zx,PI*1.0*cos(speed*0.25)); // rotation y dir.zx = rotate(dir.zx,PI*1.0*cos(speed*0.25)); // rotation y
dir.xy = rotate(dir.xy,-speed*0.5); // rotation z dir.xy = rotate(dir.xy,-speed*0.5); // rotation z
vec3 ray = vec3(ground_x,ground_y,ground_z); vec3 ray = vec3(ground_x,ground_y,ground_z);
//the raymarch //the raymarch
float t = 0.0; float t = 0.0;
t = render_scene(ray,dir,t); t = render_scene(ray,dir,t);
vec3 hit = ray + dir*t; vec3 hit = ray + dir*t;
t += hit.x; t += hit.x;
//get normal for reflection //get normal for reflection
vec3 n = getNormal(hit); vec3 n = getNormal(hit);
//render reflection //render reflection
dir = reflect(dir, n); dir = reflect(dir, n);
dir = normalize(refract(dir, n, .82)); dir = normalize(refract(dir, n, .82));
@ -99,5 +107,6 @@ void main(void)
float c = (n.x*1.0 + n.y+n.z)*0.5; float c = (n.x*1.0 + n.y+n.z)*0.5;
vec3 color = vec3(0., c*t*0.125*p.x + t*0.1, c*t*0.); vec3 color = vec3(0., c*t*0.125*p.x + t*0.1, c*t*0.);
color *= 2.412; color *= 2.412;
FragColor = vec4(color, 1.0); FragColor = vec4(color, 1.0);
} }