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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
/* Marble */
__device_noinline float svm_marble(float3 p, float size, NodeMarbleType type, NodeWaveType wave, NodeNoiseBasis basis, int hard, float turb, int depth)
{
float x = p.x;
float y = p.y;
float z = p.z;
float n = 5.0f * (x + y + z);
float mi = n + turb * noise_turbulence(p/size, basis, depth, hard);
mi = noise_wave(wave, mi);
if(type == NODE_MARBLE_SHARP)
mi = sqrt(mi);
else if(type == NODE_MARBLE_SHARPER)
mi = sqrt(sqrt(mi));
return mi;
}
__device void svm_node_tex_marble(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
{
uint4 node2 = read_node(kg, offset);
uint type, wave, basis, hard;
uint depth;
uint size_offset, turbulence_offset, co_offset, fac_offset;
decode_node_uchar4(node.y, &type, &wave, &basis, &hard);
decode_node_uchar4(node.z, &depth, NULL, NULL, NULL);
decode_node_uchar4(node.w, &size_offset, &turbulence_offset, &co_offset, &fac_offset);
float3 co = stack_load_float3(stack, co_offset);
float size = stack_load_float_default(stack, size_offset, node2.x);
float turbulence = stack_load_float_default(stack, turbulence_offset, node2.y);
size = nonzerof(size, 1e-5f);
float f = svm_marble(co, size, (NodeMarbleType)type, (NodeWaveType)wave,
(NodeNoiseBasis)basis, hard, turbulence, depth);
stack_store_float(stack, fac_offset, f);
}
CCL_NAMESPACE_END
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