You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
31 lines
648 B
31 lines
648 B
#version 330 core
|
|
out vec4 pixColor;
|
|
|
|
uniform int iterationCount;
|
|
uniform float divergeThreshold;
|
|
|
|
in vec2 complexPos;
|
|
|
|
vec2 mul(in vec2 a, in vec2 b) {
|
|
return vec2(a.x * b.x - a.y * b.y, a.y * b.x + a.x * b.y);
|
|
}
|
|
|
|
vec3 getColor(in float value){
|
|
vec3 red = vec3(0.5, 0, 0);
|
|
vec3 blue = vec3(0, 0, 0.5);
|
|
return value * red + (1 - value) * blue;
|
|
}
|
|
|
|
void main(){
|
|
|
|
vec2 z;
|
|
float stepsNeeded = 0;
|
|
while (stepsNeeded < iterationCount && length(z) < divergeThreshold){
|
|
z = mul(z, z) + complexPos;
|
|
++stepsNeeded;
|
|
}
|
|
|
|
float value = stepsNeeded / iterationCount;
|
|
pixColor = vec4(getColor(value), 1);
|
|
}
|
|
|
|
|