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Diffstat (limited to 'intern/cycles/kernel/svm/svm_noise.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_noise.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_noise.h b/intern/cycles/kernel/svm/svm_noise.h new file mode 100644 index 00000000000..28ad028ad0e --- /dev/null +++ b/intern/cycles/kernel/svm/svm_noise.h @@ -0,0 +1,213 @@ +/* + * Adapted from Open Shading Language with this license: + * + * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al. + * All Rights Reserved. + * + * Modifications Copyright 2011, Blender Foundation. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * * Neither the name of Sony Pictures Imageworks nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +CCL_NAMESPACE_BEGIN + +__device int quick_floor(float x) +{ + return (int)x - ((x < 0) ? 1 : 0); +} + +__device float bits_to_01(uint bits) +{ + return bits * (1.0f/(float)0xFFFFFFFF); +} + +__device uint hash(uint kx, uint ky, uint kz) +{ + // define some handy macros +#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k)))) +#define final(a,b,c) \ +{ \ + c ^= b; c -= rot(b,14); \ + a ^= c; a -= rot(c,11); \ + b ^= a; b -= rot(a,25); \ + c ^= b; c -= rot(b,16); \ + a ^= c; a -= rot(c,4); \ + b ^= a; b -= rot(a,14); \ + c ^= b; c -= rot(b,24); \ +} + // now hash the data! + uint a, b, c, len = 3; + a = b = c = 0xdeadbeef + (len << 2) + 13; + + c += kz; + b += ky; + a += kx; + final(a, b, c); + + return c; + // macros not needed anymore +#undef rot +#undef final +} + +__device int imod(int a, int b) +{ + a %= b; + return a < 0 ? a + b : a; +} + +__device uint phash(int kx, int ky, int kz, int3 p) +{ + return hash(imod(kx, p.x), imod(ky, p.y), imod(kz, p.z)); +} + +__device float floorfrac(float x, int* i) +{ + *i = quick_floor(x); + return x - *i; +} + +__device float fade(float t) +{ + return t * t * t * (t * (t * 6.0f - 15.0f) + 10.0f); +} + +__device float nerp(float t, float a, float b) +{ + return (1.0f - t) * a + t * b; +} + +__device float grad(int hash, float x, float y, float z) +{ + // use vectors pointing to the edges of the cube + int h = hash & 15; + float u = h<8 ? x : y; + float v = h<4 ? y : h==12||h==14 ? x : z; + return ((h&1) ? -u : u) + ((h&2) ? -v : v); +} + +__device float scale3(float result) +{ + return 0.9820f * result; +} + +__device_noinline float perlin(float x, float y, float z) +{ + int X; float fx = floorfrac(x, &X); + int Y; float fy = floorfrac(y, &Y); + int Z; float fz = floorfrac(z, &Z); + + float u = fade(fx); + float v = fade(fy); + float w = fade(fz); + + float result; + + result = nerp (w, nerp (v, nerp (u, grad (hash (X , Y , Z ), fx , fy , fz ), + grad (hash (X+1, Y , Z ), fx-1.0f, fy , fz )), + nerp (u, grad (hash (X , Y+1, Z ), fx , fy-1.0f, fz ), + grad (hash (X+1, Y+1, Z ), fx-1.0f, fy-1.0f, fz ))), + nerp (v, nerp (u, grad (hash (X , Y , Z+1), fx , fy , fz-1.0f ), + grad (hash (X+1, Y , Z+1), fx-1.0f, fy , fz-1.0f )), + nerp (u, grad (hash (X , Y+1, Z+1), fx , fy-1.0f, fz-1.0f ), + grad (hash (X+1, Y+1, Z+1), fx-1.0f, fy-1.0f, fz-1.0f )))); + return scale3(result); +} + +__device_noinline float perlin_periodic(float x, float y, float z, float3 pperiod) +{ + int X; float fx = floorfrac(x, &X); + int Y; float fy = floorfrac(y, &Y); + int Z; float fz = floorfrac(z, &Z); + + int3 p; + + p.x = max(quick_floor(pperiod.x), 1); + p.y = max(quick_floor(pperiod.y), 1); + p.z = max(quick_floor(pperiod.z), 1); + + float u = fade(fx); + float v = fade(fy); + float w = fade(fz); + + float result; + + result = nerp (w, nerp (v, nerp (u, grad (phash (X , Y , Z , p), fx , fy , fz ), + grad (phash (X+1, Y , Z , p), fx-1.0f, fy , fz )), + nerp (u, grad (phash (X , Y+1, Z , p), fx , fy-1.0f, fz ), + grad (phash (X+1, Y+1, Z , p), fx-1.0f, fy-1.0f, fz ))), + nerp (v, nerp (u, grad (phash (X , Y , Z+1, p), fx , fy , fz-1.0f ), + grad (phash (X+1, Y , Z+1, p), fx-1.0f, fy , fz-1.0f )), + nerp (u, grad (phash (X , Y+1, Z+1, p), fx , fy-1.0f, fz-1.0f ), + grad (phash (X+1, Y+1, Z+1, p), fx-1.0f, fy-1.0f, fz-1.0f )))); + return scale3(result); +} + +/* perlin noise in range 0..1 */ +__device float noise(float3 p) +{ + float r = perlin(p.x, p.y, p.z); + return 0.5f*r + 0.5f; +} + +/* perlin noise in range -1..1 */ +__device float snoise(float3 p) +{ + return perlin(p.x, p.y, p.z); +} + +/* cell noise */ +__device_noinline float cellnoise(float3 p) +{ + uint ix = quick_floor(p.x); + uint iy = quick_floor(p.y); + uint iz = quick_floor(p.z); + + return bits_to_01(hash(ix, iy, iz)); +} + +__device float3 cellnoise_color(float3 p) +{ + float r = cellnoise(p); + float g = cellnoise(make_float3(p.y, p.x, p.z)); + float b = cellnoise(make_float3(p.y, p.z, p.x)); + + return make_float3(r, g, b); +} + +/* periodic perlin noise in range 0..1 */ +__device float pnoise(float3 p, float3 pperiod) +{ + float r = perlin_periodic(p.x, p.y, p.z, pperiod); + return 0.5f*r + 0.5f; +} + +/* periodic perlin noise in range -1..1 */ +__device float psnoise(float3 p, float3 pperiod) +{ + return perlin_periodic(p.x, p.y, p.z, pperiod); +} + +CCL_NAMESPACE_END + |