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/*
* 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
/* Clouds */
__device_inline void svm_clouds(NodeNoiseBasis basis, int hard, int depth, float size, float3 p, float *fac, float3 *color)
{
p /= size;
*fac = noise_turbulence(p, basis, depth, hard);
*color = make_float3(*fac,
noise_turbulence(make_float3(p.y, p.x, p.z), basis, depth, hard),
noise_turbulence(make_float3(p.y, p.z, p.x), basis, depth, hard));
}
__device void svm_node_tex_clouds(ShaderData *sd, float *stack, uint4 node)
{
uint basis, hard, depth;
uint size_offset, co_offset, fac_offset, color_offset;
decode_node_uchar4(node.y, &basis, &hard, &depth, NULL);
decode_node_uchar4(node.z, &size_offset, &co_offset, &fac_offset, &color_offset);
float3 co = stack_load_float3(stack, co_offset);
float size = stack_load_float_default(stack, size_offset, node.w);
size = nonzerof(size, 1e-5f);
float3 color;
float f;
svm_clouds((NodeNoiseBasis)basis, hard, depth, size, co, &f, &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
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