forked from bartvdbraak/blender
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
|
|
* 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
|
|
|
|
/* Checker */
|
|
|
|
__device_noinline float svm_checker(float3 p, float scale)
|
|
{
|
|
p *= scale;
|
|
|
|
/* avoid precision issues on unit coordinates */
|
|
p.x = (p.x + 0.00001f)*0.9999f;
|
|
p.y = (p.y + 0.00001f)*0.9999f;
|
|
p.z = (p.z + 0.00001f)*0.9999f;
|
|
|
|
int xi = (int)fabsf(floorf(p.x));
|
|
int yi = (int)fabsf(floorf(p.y));
|
|
int zi = (int)fabsf(floorf(p.z));
|
|
|
|
return ((xi % 2 == yi % 2) == (zi % 2))? 1.0f: 0.0f;
|
|
}
|
|
|
|
__device void svm_node_tex_checker(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node, int *offset)
|
|
{
|
|
uint co_offset, color1_offset, color2_offset, scale_offset;
|
|
uint color_offset, fac_offset;
|
|
|
|
decode_node_uchar4(node.y, &co_offset, &color1_offset, &color2_offset, &scale_offset);
|
|
decode_node_uchar4(node.z, &color_offset, &fac_offset, NULL, NULL);
|
|
|
|
float3 co = stack_load_float3(stack, co_offset);
|
|
float3 color1 = stack_load_float3(stack, color1_offset);
|
|
float3 color2 = stack_load_float3(stack, color2_offset);
|
|
float scale = stack_load_float_default(stack, scale_offset, node.w);
|
|
|
|
float f = svm_checker(co, scale);
|
|
|
|
if(stack_valid(color_offset))
|
|
stack_store_float3(stack, color_offset, (f == 1.0f)? color1: color2);
|
|
if(stack_valid(fac_offset))
|
|
stack_store_float(stack, fac_offset, f);
|
|
}
|
|
|
|
CCL_NAMESPACE_END
|
|
|