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Diffstat (limited to 'intern/cycles/kernel/svm/svm_texture.h')
| -rw-r--r-- | intern/cycles/kernel/svm/svm_texture.h | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_texture.h b/intern/cycles/kernel/svm/svm_texture.h new file mode 100644 index 00000000000..82797018d74 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_texture.h @@ -0,0 +1,259 @@ +/* + * Copyright 2011, Blender Foundation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +CCL_NAMESPACE_BEGIN + +/* Voronoi Distances */ + +__device float voronoi_distance(NodeDistanceMetric distance_metric, float3 d, float e) +{ + if(distance_metric == NODE_VORONOI_DISTANCE_SQUARED) + return dot(d, d); + if(distance_metric == NODE_VORONOI_ACTUAL_DISTANCE) + return len(d); + if(distance_metric == NODE_VORONOI_MANHATTAN) + return fabsf(d.x) + fabsf(d.y) + fabsf(d.z); + if(distance_metric == NODE_VORONOI_CHEBYCHEV) + return fmaxf(fabsf(d.x), fmaxf(fabsf(d.y), fabsf(d.z))); + if(distance_metric == NODE_VORONOI_MINKOVSKY_H) + return sqrtf(fabsf(d.x)) + sqrtf(fabsf(d.y)) + sqrtf(fabsf(d.y)); + if(distance_metric == NODE_VORONOI_MINKOVSKY_4) + return sqrtf(sqrtf(dot(d*d, d*d))); + if(distance_metric == NODE_VORONOI_MINKOVSKY) + return powf(powf(fabsf(d.x), e) + powf(fabsf(d.y), e) + powf(fabsf(d.z), e), 1.0f/e); + + return 0.0f; +} + +/* Voronoi / Worley like */ + +__device_noinline void voronoi(float3 p, NodeDistanceMetric distance_metric, float e, float da[4], float3 pa[4]) +{ + /* returns distances in da and point coords in pa */ + int xx, yy, zz, xi, yi, zi; + + xi = (int)floorf(p.x); + yi = (int)floorf(p.y); + zi = (int)floorf(p.z); + + da[0] = 1e10f; + da[1] = 1e10f; + da[2] = 1e10f; + da[3] = 1e10f; + + pa[0] = make_float3(0.0f, 0.0f, 0.0f); + pa[1] = make_float3(0.0f, 0.0f, 0.0f); + pa[2] = make_float3(0.0f, 0.0f, 0.0f); + pa[3] = make_float3(0.0f, 0.0f, 0.0f); + + for(xx = xi-1; xx <= xi+1; xx++) { + for(yy = yi-1; yy <= yi+1; yy++) { + for(zz = zi-1; zz <= zi+1; zz++) { + float3 ip = make_float3((float)xx, (float)yy, (float)zz); + float3 vp = cellnoise_color(ip); + float3 pd = p - (vp + ip); + float d = voronoi_distance(distance_metric, pd, e); + + vp += ip; + + if(d < da[0]) { + da[3] = da[2]; + da[2] = da[1]; + da[1] = da[0]; + da[0] = d; + + pa[3] = pa[2]; + pa[2] = pa[1]; + pa[1] = pa[0]; + pa[0] = vp; + } + else if(d < da[1]) { + da[3] = da[2]; + da[2] = da[1]; + da[1] = d; + + pa[3] = pa[2]; + pa[2] = pa[1]; + pa[1] = vp; + } + else if(d < da[2]) { + da[3] = da[2]; + da[2] = d; + + pa[3] = pa[2]; + pa[2] = vp; + } + else if(d < da[3]) { + da[3] = d; + pa[3] = vp; + } + } + } + } +} + +__device float voronoi_Fn(float3 p, int n) +{ + float da[4]; + float3 pa[4]; + + voronoi(p, NODE_VORONOI_DISTANCE_SQUARED, 0, da, pa); + + return da[n]; +} + +__device float voronoi_FnFn(float3 p, int n1, int n2) +{ + float da[4]; + float3 pa[4]; + + voronoi(p, NODE_VORONOI_DISTANCE_SQUARED, 0, da, pa); + + return da[n2] - da[n1]; +} + +__device float voronoi_F1(float3 p) { return voronoi_Fn(p, 0); } +__device float voronoi_F2(float3 p) { return voronoi_Fn(p, 1); } +__device float voronoi_F3(float3 p) { return voronoi_Fn(p, 2); } +__device float voronoi_F4(float3 p) { return voronoi_Fn(p, 3); } +__device float voronoi_F1F2(float3 p) { return voronoi_FnFn(p, 0, 1); } + +__device float voronoi_Cr(float3 p) +{ + /* crackle type pattern, just a scale/clamp of F2-F1 */ + float t = 10.0f*voronoi_F1F2(p); + return (t > 1.0f)? 1.0f: t; +} + +__device float voronoi_F1S(float3 p) { return 2.0f*voronoi_F1(p) - 1.0f; } +__device float voronoi_F2S(float3 p) { return 2.0f*voronoi_F2(p) - 1.0f; } +__device float voronoi_F3S(float3 p) { return 2.0f*voronoi_F3(p) - 1.0f; } +__device float voronoi_F4S(float3 p) { return 2.0f*voronoi_F4(p) - 1.0f; } +__device float voronoi_F1F2S(float3 p) { return 2.0f*voronoi_F1F2(p) - 1.0f; } +__device float voronoi_CrS(float3 p) { return 2.0f*voronoi_Cr(p) - 1.0f; } + +/* Noise Bases */ + +__device float noise_basis(float3 p, NodeNoiseBasis basis) +{ + /* Only Perlin enabled for now, others break CUDA compile by making kernel + too big, with compile using > 4GB, due to everything being inlined. */ + +#if 0 + if(basis == NODE_NOISE_PERLIN) +#endif + return noise(p); +#if 0 + if(basis == NODE_NOISE_VORONOI_F1) + return voronoi_F1S(p); + if(basis == NODE_NOISE_VORONOI_F2) + return voronoi_F2S(p); + if(basis == NODE_NOISE_VORONOI_F3) + return voronoi_F3S(p); + if(basis == NODE_NOISE_VORONOI_F4) + return voronoi_F4S(p); + if(basis == NODE_NOISE_VORONOI_F2_F1) + return voronoi_F1F2S(p); + if(basis == NODE_NOISE_VORONOI_CRACKLE) + return voronoi_CrS(p); + if(basis == NODE_NOISE_CELL_NOISE) + return cellnoise(p); + + return 0.0f; +#endif +} + +/* Soft/Hard Noise */ + +__device float noise_basis_hard(float3 p, NodeNoiseBasis basis, int hard) +{ + float t = noise_basis(p, basis); + return (hard)? fabsf(2.0f*t - 1.0f): t; +} + +/* Waves */ + +__device float noise_wave(NodeWaveType wave, float a) +{ + if(wave == NODE_WAVE_SINE) { + return 0.5f + 0.5f*sin(a); + } + else if(wave == NODE_WAVE_SAW) { + float b = 2.0f*M_PI_F; + int n = (int)(a / b); + a -= n*b; + if(a < 0.0f) a += b; + + return a / b; + } + else if(wave == NODE_WAVE_TRI) { + float b = 2.0f*M_PI_F; + float rmax = 1.0f; + + return rmax - 2.0f*fabsf(floorf((a*(1.0f/b))+0.5f) - (a*(1.0f/b))); + } + + return 0.0f; +} + +/* Turbulence */ + +__device_noinline float noise_turbulence(float3 p, NodeNoiseBasis basis, float octaves, int hard) +{ + float fscale = 1.0f; + float amp = 1.0f; + float sum = 0.0f; + int i, n; + + octaves = clamp(octaves, 0.0f, 16.0f); + n= (int)octaves; + + for(i = 0; i <= n; i++) { + float t = noise_basis(fscale*p, basis); + + if(hard) + t = fabsf(2.0f*t - 1.0f); + + sum += t*amp; + amp *= 0.5f; + fscale *= 2.0f; + } + + float rmd = octaves - floor(octaves); + + if(rmd != 0.0f) { + float t = noise_basis(fscale*p, basis); + + if(hard) + t = fabsf(2.0f*t - 1.0f); + + float sum2 = sum + t*amp; + + sum *= ((float)(1 << n)/(float)((1 << (n+1)) - 1)); + sum2 *= ((float)(1 << (n+1))/(float)((1 << (n+2)) - 1)); + + return (1.0f - rmd)*sum + rmd*sum2; + } + else { + sum *= ((float)(1 << n)/(float)((1 << (n+1)) - 1)); + return sum; + } +} + +CCL_NAMESPACE_END + |