mirror of https://github.com/axmolengine/axmol.git
43 lines
1.2 KiB
GLSL
43 lines
1.2 KiB
GLSL
// Shader from http://www.iquilezles.org/apps/shadertoy/
|
|
|
|
#ifdef GL_ES
|
|
precision highp float;
|
|
#endif
|
|
|
|
uniform vec2 center;
|
|
uniform vec2 resolution;
|
|
uniform vec4 u_Time;
|
|
uniform vec2 u_screenSize;
|
|
|
|
void main(void)
|
|
{
|
|
#ifdef METAL
|
|
vec2 fragCoord = vec2(gl_FragCoord.x, u_screenSize.y - gl_FragCoord.y);
|
|
#else
|
|
vec2 fragCoord = gl_FragCoord.xy;
|
|
#endif
|
|
vec2 p = 2.0 * (fragCoord - center.xy) / resolution.xy;
|
|
float a = u_Time[1]*40.0;
|
|
float d,e,f,g=1.0/40.0,h,i,r,q;
|
|
e=400.0*(p.x*0.5+0.5);
|
|
f=400.0*(p.y*0.5+0.5);
|
|
i=200.0+sin(e*g+a/150.0)*20.0;
|
|
d=200.0+cos(f*g/2.0)*18.0+cos(e*g)*7.0;
|
|
r=sqrt(pow(i-e,2.0)+pow(d-f,2.0));
|
|
q=f/r;
|
|
e=(r*cos(q))-a/2.0;f=(r*sin(q))-a/2.0;
|
|
d=sin(e*g)*176.0+sin(e*g)*164.0+r;
|
|
h=((f+d)+a/2.0)*g;
|
|
i=cos(h+r*p.x/1.3)*(e+e+a)+cos(q*g*6.0)*(r+h/3.0);
|
|
h=sin(f*g)*144.0-sin(e*g)*212.0*p.x;
|
|
h=(h+(f-e)*q+sin(r-(a+h)/7.0)*10.0+i/4.0)*g;
|
|
i+=cos(h*2.3*sin(a/350.0-q))*184.0*sin(q-(r*4.3+a/12.0)*g)+tan(r*g+h)*184.0*cos(r*g+h);
|
|
i=mod(i/5.6,256.0)/64.0;
|
|
if(i<0.0) i+=4.0;
|
|
if(i>=2.0) i=4.0-i;
|
|
d=r/350.0;
|
|
d+=sin(d*d*8.0)*0.52;
|
|
f=(sin(a*g)+1.0)/2.0;
|
|
gl_FragColor=vec4(vec3(f*i/1.6,i/2.0+d/13.0,i)*d*p.x+vec3(i/1.3+d/8.0,i/2.0+d/18.0,i)*d*(1.0-p.x),1.0);
|
|
}
|