diff options
Diffstat (limited to 'intern/cycles/kernel/svm/svm_voronoi.h')
-rw-r--r-- | intern/cycles/kernel/svm/svm_voronoi.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/intern/cycles/kernel/svm/svm_voronoi.h b/intern/cycles/kernel/svm/svm_voronoi.h new file mode 100644 index 00000000000..df37b8faca8 --- /dev/null +++ b/intern/cycles/kernel/svm/svm_voronoi.h @@ -0,0 +1,105 @@ +/* + * 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 */ + +__device float svm_voronoi(NodeDistanceMetric distance_metric, NodeVoronoiColoring coloring, + float weight1, float weight2, float weight3, float weight4, + float exponent, float intensity, float size, float3 p, float3 *color) +{ + float aw1 = fabsf(weight1); + float aw2 = fabsf(weight2); + float aw3 = fabsf(weight3); + float aw4 = fabsf(weight4); + float sc = (aw1 + aw2 + aw3 + aw4); + + if(sc != 0.0f) + sc = intensity/sc; + + /* compute distance and point coordinate of 4 nearest neighbours */ + float da[4]; + float3 pa[4]; + + voronoi(p/size, distance_metric, exponent, da, pa); + + /* Scalar output */ + float fac = sc * fabsf(weight1*da[0] + weight2*da[1] + weight3*da[2] + weight4*da[3]); + + /* colored output */ + if(coloring == NODE_VORONOI_INTENSITY) { + *color = make_float3(fac, fac, fac); + } + else { + *color = aw1*cellnoise_color(pa[0]); + *color += aw2*cellnoise_color(pa[1]); + *color += aw3*cellnoise_color(pa[2]); + *color += aw4*cellnoise_color(pa[3]); + + if(coloring != NODE_VORONOI_POSITION) { + float t1 = min((da[1] - da[0])*10.0f, 1.0f); + + if(coloring == NODE_VORONOI_POSITION_OUTLINE_INTENSITY) + *color *= t1*fac; + else if(coloring == NODE_VORONOI_POSITION_OUTLINE) + *color *= t1*sc; + } + else { + *color *= sc; + } + } + + return fac; +} + +__device void svm_node_tex_voronoi(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset) +{ + uint4 node2 = read_node(kg, offset); + uint4 node3 = read_node(kg, offset); + + uint distance_metric, coloring, exponent_offset; + uint size_offset, co_offset, fac_offset, color_offset; + uint weight1_offset, weight2_offset, weight3_offset, weight4_offset; + + decode_node_uchar4(node.y, &distance_metric, &coloring, &exponent_offset, NULL); + decode_node_uchar4(node.z, &size_offset, &co_offset, &fac_offset, &color_offset); + decode_node_uchar4(node.w, &weight1_offset, &weight2_offset, &weight3_offset, &weight4_offset); + + float3 co = stack_load_float3(stack, co_offset); + float weight1 = stack_load_float_default(stack, weight1_offset, node2.x); + float weight2 = stack_load_float_default(stack, weight2_offset, node2.y); + float weight3 = stack_load_float_default(stack, weight3_offset, node2.z); + float weight4 = stack_load_float_default(stack, weight4_offset, node2.w); + float exponent = stack_load_float_default(stack, exponent_offset, node3.x); + float size = stack_load_float_default(stack, size_offset, node3.y); + + exponent = fmaxf(exponent, 1e-5f); + size = nonzerof(size, 1e-5f); + + float3 color; + float f = svm_voronoi((NodeDistanceMetric)distance_metric, + (NodeVoronoiColoring)coloring, + weight1, weight2, weight3, weight4, exponent, 1.0f, size, co, &color); + + if(stack_valid(fac_offset)) stack_store_float(stack, fac_offset, f); + if(stack_valid(color_offset)) stack_store_float3(stack, color_offset, color); +} + +CCL_NAMESPACE_END + |