float rand_seed = 0; uint hash( uint x ) { x += ( x << 10u ); x ^= ( x >> 6u ); x += ( x << 3u ); x ^= ( x >> 11u ); x += ( x << 15u ); return x; } uint hash( uvec2 v ) { return hash( v.x ^ hash(v.y) ); } uint hash( uvec3 v ) { return hash( v.x ^ hash(v.y) ^ hash(v.z) ); } uint hash( uvec4 v ) { return hash( v.x ^ hash(v.y) ^ hash(v.z) ^ hash(v.w) ); } float floatConstruct( uint m ) { const uint ieeeMantissa = 0x007FFFFFu; const uint ieeeOne = 0x3F800000u; m &= ieeeMantissa; m |= ieeeOne; float f = uintBitsToFloat( m ); return f - 1.0; } float randombis( float x ) { return floatConstruct(hash(floatBitsToUint(x))); } float randombis( vec2 v ) { return floatConstruct(hash(floatBitsToUint(v))); } float randombis( vec3 v ) { return floatConstruct(hash(floatBitsToUint(v))); } float randombis( vec4 v ) { return floatConstruct(hash(floatBitsToUint(v))); } float random(vec2 uv, float time) { if (rand_seed == 0) rand_seed = time; rand_seed *= 2; return randombis(vec3(uv.xy, time * rand_seed)); } vec3 randomVec3(vec2 uv, float time) { return (vec3((random(uv, time) - 0.5) * 2, (random(uv, time) - 0.5) * 2, (random(uv, time) - 0.5) * 2)); }