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/*
* 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
ccl_device float average_fac(float3 v)
{
return (fabsf(v.x) + fabsf(v.y) + fabsf(v.z))/3.0f;
}
ccl_device void svm_vector_math(float *Fac, float3 *Vector, NodeVectorMath type, float3 Vector1, float3 Vector2)
{
if(type == NODE_VECTOR_MATH_ADD) {
*Vector = Vector1 + Vector2;
*Fac = average_fac(*Vector);
}
else if(type == NODE_VECTOR_MATH_SUBTRACT) {
*Vector = Vector1 - Vector2;
*Fac = average_fac(*Vector);
}
else if(type == NODE_VECTOR_MATH_AVERAGE) {
*Fac = len(Vector1 + Vector2);
*Vector = normalize(Vector1 + Vector2);
}
else if(type == NODE_VECTOR_MATH_DOT_PRODUCT) {
*Fac = dot(Vector1, Vector2);
*Vector = make_float3(0.0f, 0.0f, 0.0f);
}
else if(type == NODE_VECTOR_MATH_CROSS_PRODUCT) {
float3 c = cross(Vector1, Vector2);
*Fac = len(c);
*Vector = normalize(c);
}
else if(type == NODE_VECTOR_MATH_NORMALIZE) {
*Fac = len(Vector1);
*Vector = normalize(Vector1);
}
else {
*Fac = 0.0f;
*Vector = make_float3(0.0f, 0.0f, 0.0f);
}
}
/* Nodes */
ccl_device void svm_node_math(KernelGlobals *kg, ShaderData *sd, float *stack, uint itype, uint f1_offset, uint f2_offset, int *offset)
{
NodeMath type = (NodeMath)itype;
float f1 = stack_load_float(stack, f1_offset);
float f2 = stack_load_float(stack, f2_offset);
float f = svm_math(type, f1, f2);
uint4 node1 = read_node(kg, offset);
stack_store_float(stack, node1.y, f);
}
ccl_device void svm_node_vector_math(KernelGlobals *kg, ShaderData *sd, float *stack, uint itype, uint v1_offset, uint v2_offset, int *offset)
{
NodeVectorMath type = (NodeVectorMath)itype;
float3 v1 = stack_load_float3(stack, v1_offset);
float3 v2 = stack_load_float3(stack, v2_offset);
float f;
float3 v;
svm_vector_math(&f, &v, type, v1, v2);
uint4 node1 = read_node(kg, offset);
if(stack_valid(node1.y)) stack_store_float(stack, node1.y, f);
if(stack_valid(node1.z)) stack_store_float3(stack, node1.z, v);
}
CCL_NAMESPACE_END
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