forked from bartvdbraak/blender
62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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CCL_NAMESPACE_BEGIN
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/* Checker */
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__device_noinline float svm_checker(float3 p, float scale)
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{
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p *= scale;
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/* avoid precision issues on unit coordinates */
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p.x = (p.x + 0.00001f)*0.9999f;
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p.y = (p.y + 0.00001f)*0.9999f;
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p.z = (p.z + 0.00001f)*0.9999f;
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int xi = (int)fabsf(floorf(p.x));
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int yi = (int)fabsf(floorf(p.y));
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int zi = (int)fabsf(floorf(p.z));
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return ((xi % 2 == yi % 2) == (zi % 2))? 1.0f: 0.0f;
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}
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__device void svm_node_tex_checker(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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uint co_offset, color1_offset, color2_offset, scale_offset;
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uint color_offset, fac_offset;
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decode_node_uchar4(node.y, &co_offset, &color1_offset, &color2_offset, &scale_offset);
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decode_node_uchar4(node.z, &color_offset, &fac_offset, NULL, NULL);
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float3 co = stack_load_float3(stack, co_offset);
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float3 color1 = stack_load_float3(stack, color1_offset);
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float3 color2 = stack_load_float3(stack, color2_offset);
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float scale = stack_load_float_default(stack, scale_offset, node.w);
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float f = svm_checker(co, scale);
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if(stack_valid(color_offset))
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stack_store_float3(stack, color_offset, (f == 1.0f)? color1: color2);
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if(stack_valid(fac_offset))
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stack_store_float(stack, fac_offset, f);
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}
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CCL_NAMESPACE_END
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