#version 410 core
uniform float fGlobalTime; // in seconds
uniform vec2 v2Resolution; // viewport resolution (in pixels)
uniform sampler1D texFFT; // towards 0.0 is bass / lower freq, towards 1.0 is higher / treble freq
uniform sampler1D texFFTSmoothed; // this one has longer falloff and less harsh transients
uniform sampler1D texFFTIntegrated; // this is continually increasing
uniform sampler2D texChecker;
uniform sampler2D texNoise;
uniform sampler2D texParty;
uniform sampler2D texTex1;
uniform sampler2D texTex2;
uniform sampler2D texTex3;
uniform sampler2D texTex4;
uniform sampler2D texUm;
layout(location = 0) out vec4 out_color; // out_color must be written in order to see anything
vec4 plas( vec2 v, float time )
{
float c = 0.5 + sin( v.x * 10.0 ) + cos( sin( time + v.y ) * 20.0 );
return vec4( sin(c * 0.2 + cos(time)), c * 0.15, cos( c * 0.1 + time / .4 ) * .25, 1.0 );
}
vec4 mat(vec3 p){
return vec4(1);
}
//vec3 normal(vec3 p ){}
float sphere(vec3 p , float l){
return length(p)-l;
}
float scene(vec3 p){
float c = 1;
return sphere(mod(p,c) - (c/2),.1);
}
vec4 trace(vec3 ro, vec3 rd){
float d = 0;
vec3 p = ro;
for (int i = 0; i < 32; i++){
d = scene(p);
p += d * rd;
if (d < 0.01){
return mat(p);
}
}
return vec4(0);
}
void main(void)
{
vec2 uv = vec2(gl_FragCoord.x / v2Resolution.x, gl_FragCoord.y / v2Resolution.y);
uv -= 0.5;
uv /= vec2(v2Resolution.y / v2Resolution.x, 1);
float FOV = 1;
vec3 ro = vec3(sin(fGlobalTime),0,fGlobalTime);
vec3 lookat = vec3(0,0,fGlobalTime + 100);
vec3 forward = normalize(lookat - ro);
vec3 right = normalize(vec3(forward.z,0,forward.y));
vec3 up = normalize(cross(right,forward));
//vec3 rd = normalize(forward* uv.x + FOV + right *uv.y *FOV *up);
// vec3 rd = normalize(right + FOV * uv.x + forward * FOV *uv.y *up);
vec3 rd = normalize(right+FOV *uv.x *forward+FOV * uv.y *up);
vec2 m;
m.x = atan(uv.x / uv.y) / 3.14;
m.y = 1 / length(uv) * .2;
float d = m.y;
float f = texture( texFFT, d ).r * 100;
m.x += sin( fGlobalTime ) * 0.1;
m.y += fGlobalTime * 0.25;
vec4 t = plas( m * 3.14, fGlobalTime ) / d;
t = clamp( t, 0.0, 1.0 );
out_color = (f + t) * trace(ro,rd);
}
