float rand(float n){return fract(sin(n) * 43758.5453123);}
float noise(float p){
float fl = floor(p);
float fc = fract(p);
return mix(rand(fl), rand(fl + 1.0), fc);
}
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#ifndef __QUATERNION_INCLUDED__ | |
#define __QUATERNION_INCLUDED__ | |
#define QUATERNION_IDENTITY float4(0, 0, 0, 1) | |
#ifndef PI | |
#define PI 3.14159265359f | |
#endif | |
// Quaternion multiplication |