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// ----- Vertex Shader -----
#version 410 core
layout(location = 0) in vec3 position;
uniform mat4 projection;
uniform mat4 model;
void main(){
gl_Position = projection * model * vec4(position,1);
}
// ----- Fragment Shader -----
#version 410 core
uniform vec2 resolution;
uniform float time;
out vec3 color;
#define ACCURACY 1000
#define LIMIT 1000
vec2 cmult(vec2 z1,vec2 z2){
return(vec2(z1.x*z2.x-z1.y*z2.y,z1.x*z2.y+z1.y*z2.x));
}
vec2 IsDiverging(vec2 coord){
vec2 z=vec2(coord.x,coord.y);
int i;
for(i=0;i<ACCURACY;i++){
z=cmult(z,z)+vec2(-0.3,0.5);
if(length(z) > LIMIT)
break;
}
return(z);
}
void main()
{
vec2 coord=gl_FragCoord.xy/resolution.xy;
coord-=0.5;
coord/=(time/10);
float d=length(IsDiverging(coord));
color=vec3(LIMIT/(d*2),0,0);
}
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