forked from bartvdbraak/blender
5ff132182d
This inconsistency drove me totally crazy, it's really confusing when it's inconsistent especially when you work on both Cycles and Blender sides. Shouldn;t cause merge PITA, it's whitespace changes only, Git should be able to merge it nicely.
317 lines
7.6 KiB
C
317 lines
7.6 KiB
C
/*
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* Copyright 2011-2013 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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CCL_NAMESPACE_BEGIN
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/* Voronoi Distances */
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#if 0
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ccl_device float voronoi_distance(NodeDistanceMetric distance_metric, float3 d, float e)
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{
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#if 0
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if(distance_metric == NODE_VORONOI_DISTANCE_SQUARED)
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#endif
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return dot(d, d);
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#if 0
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if(distance_metric == NODE_VORONOI_ACTUAL_DISTANCE)
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return len(d);
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if(distance_metric == NODE_VORONOI_MANHATTAN)
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return fabsf(d.x) + fabsf(d.y) + fabsf(d.z);
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if(distance_metric == NODE_VORONOI_CHEBYCHEV)
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return fmaxf(fabsf(d.x), fmaxf(fabsf(d.y), fabsf(d.z)));
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if(distance_metric == NODE_VORONOI_MINKOVSKY_H)
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return sqrtf(fabsf(d.x)) + sqrtf(fabsf(d.y)) + sqrtf(fabsf(d.y));
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if(distance_metric == NODE_VORONOI_MINKOVSKY_4)
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return sqrtf(sqrtf(dot(d*d, d*d)));
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if(distance_metric == NODE_VORONOI_MINKOVSKY)
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return powf(powf(fabsf(d.x), e) + powf(fabsf(d.y), e) + powf(fabsf(d.z), e), 1.0f/e);
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return 0.0f;
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#endif
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}
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/* Voronoi / Worley like */
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ccl_device_inline float4 voronoi_Fn(float3 p, float e, int n1, int n2)
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{
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float da[4];
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float3 pa[4];
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NodeDistanceMetric distance_metric = NODE_VORONOI_DISTANCE_SQUARED;
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/* returns distances in da and point coords in pa */
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int xx, yy, zz, xi, yi, zi;
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xi = floor_to_int(p.x);
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yi = floor_to_int(p.y);
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zi = floor_to_int(p.z);
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da[0] = 1e10f;
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da[1] = 1e10f;
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da[2] = 1e10f;
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da[3] = 1e10f;
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pa[0] = make_float3(0.0f, 0.0f, 0.0f);
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pa[1] = make_float3(0.0f, 0.0f, 0.0f);
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pa[2] = make_float3(0.0f, 0.0f, 0.0f);
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pa[3] = make_float3(0.0f, 0.0f, 0.0f);
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for(xx = xi-1; xx <= xi+1; xx++) {
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for(yy = yi-1; yy <= yi+1; yy++) {
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for(zz = zi-1; zz <= zi+1; zz++) {
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float3 ip = make_float3((float)xx, (float)yy, (float)zz);
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float3 vp = cellnoise_color(ip);
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float3 pd = p - (vp + ip);
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float d = voronoi_distance(distance_metric, pd, e);
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vp += ip;
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if(d < da[0]) {
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da[3] = da[2];
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da[2] = da[1];
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da[1] = da[0];
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da[0] = d;
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pa[3] = pa[2];
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pa[2] = pa[1];
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pa[1] = pa[0];
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pa[0] = vp;
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}
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else if(d < da[1]) {
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da[3] = da[2];
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da[2] = da[1];
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da[1] = d;
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pa[3] = pa[2];
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pa[2] = pa[1];
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pa[1] = vp;
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}
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else if(d < da[2]) {
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da[3] = da[2];
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da[2] = d;
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pa[3] = pa[2];
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pa[2] = vp;
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}
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else if(d < da[3]) {
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da[3] = d;
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pa[3] = vp;
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}
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}
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}
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}
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float4 result = make_float4(pa[n1].x, pa[n1].y, pa[n1].z, da[n1]);
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if(n2 != -1)
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result = make_float4(pa[n2].x, pa[n2].y, pa[n2].z, da[n2]) - result;
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return result;
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}
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#endif
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ccl_device float voronoi_F1_distance(float3 p)
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{
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/* returns squared distance in da */
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float da = 1e10f;
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#ifndef __KERNEL_SSE2__
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int ix = floor_to_int(p.x), iy = floor_to_int(p.y), iz = floor_to_int(p.z);
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for(int xx = -1; xx <= 1; xx++) {
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for(int yy = -1; yy <= 1; yy++) {
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for(int zz = -1; zz <= 1; zz++) {
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float3 ip = make_float3(ix + xx, iy + yy, iz + zz);
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float3 vp = ip + cellnoise_color(ip);
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float d = len_squared(p - vp);
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da = min(d, da);
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}
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}
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}
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#else
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ssef vec_p = load4f(p);
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ssei xyzi = quick_floor_sse(vec_p);
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for(int xx = -1; xx <= 1; xx++) {
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for(int yy = -1; yy <= 1; yy++) {
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for(int zz = -1; zz <= 1; zz++) {
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ssef ip = ssef(xyzi + ssei(xx, yy, zz, 0));
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ssef vp = ip + cellnoise_color(ip);
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float d = len_squared<1, 1, 1, 0>(vec_p - vp);
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da = min(d, da);
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}
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}
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}
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#endif
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return da;
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}
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ccl_device float3 voronoi_F1_color(float3 p)
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{
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/* returns color of the nearest point */
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float da = 1e10f;
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#ifndef __KERNEL_SSE2__
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float3 pa;
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int ix = floor_to_int(p.x), iy = floor_to_int(p.y), iz = floor_to_int(p.z);
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for(int xx = -1; xx <= 1; xx++) {
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for(int yy = -1; yy <= 1; yy++) {
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for(int zz = -1; zz <= 1; zz++) {
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float3 ip = make_float3(ix + xx, iy + yy, iz + zz);
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float3 vp = ip + cellnoise_color(ip);
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float d = len_squared(p - vp);
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if(d < da) {
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da = d;
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pa = vp;
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}
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}
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}
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}
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return cellnoise_color(pa);
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#else
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ssef pa, vec_p = load4f(p);
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ssei xyzi = quick_floor_sse(vec_p);
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for(int xx = -1; xx <= 1; xx++) {
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for(int yy = -1; yy <= 1; yy++) {
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for(int zz = -1; zz <= 1; zz++) {
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ssef ip = ssef(xyzi + ssei(xx, yy, zz, 0));
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ssef vp = ip + cellnoise_color(ip);
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float d = len_squared<1, 1, 1, 0>(vec_p - vp);
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if(d < da) {
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da = d;
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pa = vp;
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}
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}
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}
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}
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ssef color = cellnoise_color(pa);
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return (float3 &)color;
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#endif
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}
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#if 0
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ccl_device float voronoi_F1(float3 p) { return voronoi_Fn(p, 0.0f, 0, -1).w; }
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ccl_device float voronoi_F2(float3 p) { return voronoi_Fn(p, 0.0f, 1, -1).w; }
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ccl_device float voronoi_F3(float3 p) { return voronoi_Fn(p, 0.0f, 2, -1).w; }
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ccl_device float voronoi_F4(float3 p) { return voronoi_Fn(p, 0.0f, 3, -1).w; }
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ccl_device float voronoi_F1F2(float3 p) { return voronoi_Fn(p, 0.0f, 0, 1).w; }
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ccl_device float voronoi_Cr(float3 p)
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{
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/* crackle type pattern, just a scale/clamp of F2-F1 */
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float t = 10.0f*voronoi_F1F2(p);
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return (t > 1.0f)? 1.0f: t;
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}
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ccl_device float voronoi_F1S(float3 p) { return 2.0f*voronoi_F1(p) - 1.0f; }
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ccl_device float voronoi_F2S(float3 p) { return 2.0f*voronoi_F2(p) - 1.0f; }
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ccl_device float voronoi_F3S(float3 p) { return 2.0f*voronoi_F3(p) - 1.0f; }
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ccl_device float voronoi_F4S(float3 p) { return 2.0f*voronoi_F4(p) - 1.0f; }
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ccl_device float voronoi_F1F2S(float3 p) { return 2.0f*voronoi_F1F2(p) - 1.0f; }
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ccl_device float voronoi_CrS(float3 p) { return 2.0f*voronoi_Cr(p) - 1.0f; }
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#endif
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/* Noise Bases */
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ccl_device float noise_basis(float3 p, NodeNoiseBasis basis)
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{
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/* Only Perlin enabled for now, others break CUDA compile by making kernel
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* too big, with compile using > 4GB, due to everything being inlined. */
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#if 0
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if(basis == NODE_NOISE_PERLIN)
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#endif
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return noise(p);
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#if 0
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if(basis == NODE_NOISE_VORONOI_F1)
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return voronoi_F1S(p);
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if(basis == NODE_NOISE_VORONOI_F2)
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return voronoi_F2S(p);
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if(basis == NODE_NOISE_VORONOI_F3)
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return voronoi_F3S(p);
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if(basis == NODE_NOISE_VORONOI_F4)
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return voronoi_F4S(p);
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if(basis == NODE_NOISE_VORONOI_F2_F1)
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return voronoi_F1F2S(p);
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if(basis == NODE_NOISE_VORONOI_CRACKLE)
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return voronoi_CrS(p);
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if(basis == NODE_NOISE_CELL_NOISE)
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return cellnoise(p);
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return 0.0f;
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#endif
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}
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/* Soft/Hard Noise */
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ccl_device float noise_basis_hard(float3 p, NodeNoiseBasis basis, int hard)
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{
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float t = noise_basis(p, basis);
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return (hard)? fabsf(2.0f*t - 1.0f): t;
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}
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/* Turbulence */
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ccl_device_noinline float noise_turbulence(float3 p, NodeNoiseBasis basis, float octaves, int hard)
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{
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float fscale = 1.0f;
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float amp = 1.0f;
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float sum = 0.0f;
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int i, n;
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octaves = clamp(octaves, 0.0f, 16.0f);
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n = float_to_int(octaves);
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for(i = 0; i <= n; i++) {
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float t = noise_basis(fscale*p, basis);
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if(hard)
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t = fabsf(2.0f*t - 1.0f);
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sum += t*amp;
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amp *= 0.5f;
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fscale *= 2.0f;
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}
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float rmd = octaves - floorf(octaves);
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if(rmd != 0.0f) {
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float t = noise_basis(fscale*p, basis);
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if(hard)
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t = fabsf(2.0f*t - 1.0f);
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float sum2 = sum + t*amp;
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sum *= ((float)(1 << n)/(float)((1 << (n+1)) - 1));
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sum2 *= ((float)(1 << (n+1))/(float)((1 << (n+2)) - 1));
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return (1.0f - rmd)*sum + rmd*sum2;
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}
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else {
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sum *= ((float)(1 << n)/(float)((1 << (n+1)) - 1));
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return sum;
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}
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}
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CCL_NAMESPACE_END
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