forked from bartvdbraak/blender
b9ce231060
More information in this post: http://code.blender.org/ Thanks to all contributes for giving their permission!
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/*
|
|
* Copyright 2011-2013 Blender Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License
|
|
*/
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
/* Voronoi */
|
|
|
|
__device_noinline float4 svm_voronoi(NodeVoronoiColoring coloring, float scale, float3 p)
|
|
{
|
|
/* compute distance and point coordinate of 4 nearest neighbours */
|
|
float4 dpa0 = voronoi_Fn(p*scale, 1.0f, 0, -1);
|
|
|
|
/* output */
|
|
float fac;
|
|
float3 color;
|
|
|
|
if(coloring == NODE_VORONOI_INTENSITY) {
|
|
fac = fabsf(dpa0.w);
|
|
color = make_float3(fac, fac, fac);
|
|
}
|
|
else {
|
|
color = cellnoise_color(float4_to_float3(dpa0));
|
|
fac = average(color);
|
|
}
|
|
|
|
return make_float4(color.x, color.y, color.z, fac);
|
|
}
|
|
|
|
__device void svm_node_tex_voronoi(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
|
|
{
|
|
uint coloring = node.y;
|
|
uint scale_offset, co_offset, fac_offset, color_offset;
|
|
|
|
decode_node_uchar4(node.z, &scale_offset, &co_offset, &fac_offset, &color_offset);
|
|
|
|
float3 co = stack_load_float3(stack, co_offset);
|
|
float scale = stack_load_float_default(stack, scale_offset, node.w);
|
|
|
|
float4 result = svm_voronoi((NodeVoronoiColoring)coloring, scale, co);
|
|
float3 color = make_float3(result.x, result.y, result.z);
|
|
float f = result.w;
|
|
|
|
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
|
|
|