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hashes.glsl
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hashes.glsl
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// Hash Functions take from:
// https://www.shadertoy.com/view/ttc3zr
//
// murmurHashNM() takes M unsigned integers and returns N hash values.
// The returned values are unsigned integers between 0 and 2^32 - 1.
//
// hashNM() takes M floating point numbers and returns N hash values.
// The returned values are floating point numbers between 0.0 and 1.0.
//------------------------------------------------------------------------------
uint murmurHash11(uint src) {
const uint M = 0x5bd1e995u;
uint h = 1190494759u;
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 1 output, 1 input
float hash11(float src) {
uint h = murmurHash11(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uint murmurHash12(uvec2 src) {
const uint M = 0x5bd1e995u;
uint h = 1190494759u;
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 1 output, 2 inputs
float hash12(vec2 src) {
uint h = murmurHash12(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uint murmurHash13(uvec3 src) {
const uint M = 0x5bd1e995u;
uint h = 1190494759u;
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 1 output, 3 inputs
float hash13(vec3 src) {
uint h = murmurHash13(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uint murmurHash14(uvec4 src) {
const uint M = 0x5bd1e995u;
uint h = 1190494759u;
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z; h *= M; h ^= src.w;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 1 output, 4 inputs
float hash14(vec4 src) {
uint h = murmurHash14(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec2 murmurHash21(uint src) {
const uint M = 0x5bd1e995u;
uvec2 h = uvec2(1190494759u, 2147483647u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 2 outputs, 1 input
vec2 hash21(float src) {
uvec2 h = murmurHash21(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec2 murmurHash22(uvec2 src) {
const uint M = 0x5bd1e995u;
uvec2 h = uvec2(1190494759u, 2147483647u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 2 outputs, 2 inputs
vec2 hash22(vec2 src) {
uvec2 h = murmurHash22(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec2 murmurHash23(uvec3 src) {
const uint M = 0x5bd1e995u;
uvec2 h = uvec2(1190494759u, 2147483647u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 2 outputs, 3 inputs
vec2 hash23(vec3 src) {
uvec2 h = murmurHash23(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec2 murmurHash24(uvec4 src) {
const uint M = 0x5bd1e995u;
uvec2 h = uvec2(1190494759u, 2147483647u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z; h *= M; h ^= src.w;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 2 outputs, 4 inputs
vec2 hash24(vec4 src) {
uvec2 h = murmurHash24(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec3 murmurHash31(uint src) {
const uint M = 0x5bd1e995u;
uvec3 h = uvec3(1190494759u, 2147483647u, 3559788179u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 3 outputs, 1 input
vec3 hash31(float src) {
uvec3 h = murmurHash31(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec3 murmurHash32(uvec2 src) {
const uint M = 0x5bd1e995u;
uvec3 h = uvec3(1190494759u, 2147483647u, 3559788179u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 3 outputs, 2 inputs
vec3 hash32(vec2 src) {
uvec3 h = murmurHash32(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec3 murmurHash33(uvec3 src) {
const uint M = 0x5bd1e995u;
uvec3 h = uvec3(1190494759u, 2147483647u, 3559788179u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 3 outputs, 3 inputs
vec3 hash33(vec3 src) {
uvec3 h = murmurHash33(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec3 murmurHash34(uvec4 src) {
const uint M = 0x5bd1e995u;
uvec3 h = uvec3(1190494759u, 2147483647u, 3559788179u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z; h *= M; h ^= src.w;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 3 outputs, 4 inputs
vec3 hash34(vec4 src) {
uvec3 h = murmurHash34(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec4 murmurHash41(uint src) {
const uint M = 0x5bd1e995u;
uvec4 h = uvec4(1190494759u, 2147483647u, 3559788179u, 179424673u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 4 outputs, 1 input
vec4 hash41(float src) {
uvec4 h = murmurHash41(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec4 murmurHash42(uvec2 src) {
const uint M = 0x5bd1e995u;
uvec4 h = uvec4(1190494759u, 2147483647u, 3559788179u, 179424673u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 4 outputs, 2 inputs
vec4 hash42(vec2 src) {
uvec4 h = murmurHash42(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec4 murmurHash43(uvec3 src) {
const uint M = 0x5bd1e995u;
uvec4 h = uvec4(1190494759u, 2147483647u, 3559788179u, 179424673u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 4 outputs, 3 inputs
vec4 hash43(vec3 src) {
uvec4 h = murmurHash43(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}
//------------------------------------------------------------------------------
uvec4 murmurHash44(uvec4 src) {
const uint M = 0x5bd1e995u;
uvec4 h = uvec4(1190494759u, 2147483647u, 3559788179u, 179424673u);
src *= M; src ^= src>>24u; src *= M;
h *= M; h ^= src.x; h *= M; h ^= src.y; h *= M; h ^= src.z; h *= M; h ^= src.w;
h ^= h>>13u; h *= M; h ^= h>>15u;
return h;
}
// 4 outputs, 4 inputs
vec4 hash44(vec4 src) {
uvec4 h = murmurHash44(floatBitsToUint(src));
return uintBitsToFloat(h & 0x007fffffu | 0x3f800000u) - 1.0;
}