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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
/* Attribute Node */
__device void svm_node_attr_init(KernelGlobals *kg, ShaderData *sd,
uint4 node, NodeAttributeType *type,
NodeAttributeType *mesh_type, AttributeElement *elem, int *offset, uint *out_offset)
{
if(sd->object != ~0) {
/* find attribute by unique id */
uint id = node.y;
uint attr_offset = sd->object*kernel_data.bvh.attributes_map_stride;
uint4 attr_map = kernel_tex_fetch(__attributes_map, attr_offset);
while(attr_map.x != id)
attr_map = kernel_tex_fetch(__attributes_map, ++attr_offset);
/* return result */
*elem = (AttributeElement)attr_map.y;
*offset = as_int(attr_map.z);
*mesh_type = (NodeAttributeType)attr_map.w;
}
else {
/* background */
*elem = ATTR_ELEMENT_NONE;
*offset = 0;
*mesh_type = (NodeAttributeType)node.w;
}
*out_offset = node.z;
*type = (NodeAttributeType)node.w;
}
__device void svm_node_attr(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
NodeAttributeType type, mesh_type;
AttributeElement elem;
uint out_offset;
int offset;
svm_node_attr_init(kg, sd, node, &type, &mesh_type, &elem, &offset, &out_offset);
#ifdef __HAIR__
if (sd->curve_seg != ~0) {
/*currently strand attributes aren't enabled - only exports stored uvs*/
if(type == NODE_ATTR_FLOAT)
stack_store_float(stack, out_offset, 0.0f);
else {
float4 sd2 = kernel_tex_fetch(__tri_woop, sd->prim*3+2);
float3 uv = make_float3(sd2.z,sd2.w,0.0f);
stack_store_float3(stack, out_offset, uv);
}
}
else
{
#endif
/* fetch and store attribute */
if(type == NODE_ATTR_FLOAT) {
if(mesh_type == NODE_ATTR_FLOAT) {
float f = triangle_attribute_float(kg, sd, elem, offset, NULL, NULL);
stack_store_float(stack, out_offset, f);
}
else {
float3 f = triangle_attribute_float3(kg, sd, elem, offset, NULL, NULL);
stack_store_float(stack, out_offset, average(f));
}
}
else {
if(mesh_type == NODE_ATTR_FLOAT3) {
float3 f = triangle_attribute_float3(kg, sd, elem, offset, NULL, NULL);
stack_store_float3(stack, out_offset, f);
}
else {
float f = triangle_attribute_float(kg, sd, elem, offset, NULL, NULL);
stack_store_float3(stack, out_offset, make_float3(f, f, f));
}
}
#ifdef __HAIR__
}
#endif
}
__device void svm_node_attr_bump_dx(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
NodeAttributeType type, mesh_type;
AttributeElement elem;
uint out_offset;
int offset;
svm_node_attr_init(kg, sd, node, &type, &mesh_type, &elem, &offset, &out_offset);
/* fetch and store attribute */
#ifdef __HAIR__
if (sd->curve_seg != ~0) {
/*currently strand attributes aren't enabled*/
if(type == NODE_ATTR_FLOAT)
stack_store_float(stack, out_offset, 0.0f);
else
stack_store_float3(stack, out_offset, make_float3(0.0f, 0.0f, 0.0f));
}
else {
#endif
if(type == NODE_ATTR_FLOAT) {
if(mesh_type == NODE_ATTR_FLOAT) {
float dx;
float f = triangle_attribute_float(kg, sd, elem, offset, &dx, NULL);
stack_store_float(stack, out_offset, f+dx);
}
else {
float3 dx;
float3 f = triangle_attribute_float3(kg, sd, elem, offset, &dx, NULL);
stack_store_float(stack, out_offset, average(f+dx));
}
}
else {
if(mesh_type == NODE_ATTR_FLOAT3) {
float3 dx;
float3 f = triangle_attribute_float3(kg, sd, elem, offset, &dx, NULL);
stack_store_float3(stack, out_offset, f+dx);
}
else {
float dx;
float f = triangle_attribute_float(kg, sd, elem, offset, &dx, NULL);
stack_store_float3(stack, out_offset, make_float3(f+dx, f+dx, f+dx));
}
}
#ifdef __HAIR__
}
#endif
}
__device void svm_node_attr_bump_dy(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
NodeAttributeType type, mesh_type;
AttributeElement elem;
uint out_offset;
int offset;
svm_node_attr_init(kg, sd, node, &type, &mesh_type, &elem, &offset, &out_offset);
/* fetch and store attribute */
#ifdef __HAIR__
if (sd->curve_seg != ~0) {
/*currently strand attributes aren't enabled*/
if(type == NODE_ATTR_FLOAT)
stack_store_float(stack, out_offset, 0.0f);
else
stack_store_float3(stack, out_offset, make_float3(0.0f, 0.0f, 0.0f));
}
else {
#endif
if(type == NODE_ATTR_FLOAT) {
if(mesh_type == NODE_ATTR_FLOAT) {
float dy;
float f = triangle_attribute_float(kg, sd, elem, offset, NULL, &dy);
stack_store_float(stack, out_offset, f+dy);
}
else {
float3 dy;
float3 f = triangle_attribute_float3(kg, sd, elem, offset, NULL, &dy);
stack_store_float(stack, out_offset, average(f+dy));
}
}
else {
if(mesh_type == NODE_ATTR_FLOAT3) {
float3 dy;
float3 f = triangle_attribute_float3(kg, sd, elem, offset, NULL, &dy);
stack_store_float3(stack, out_offset, f+dy);
}
else {
float dy;
float f = triangle_attribute_float(kg, sd, elem, offset, NULL, &dy);
stack_store_float3(stack, out_offset, make_float3(f+dy, f+dy, f+dy));
}
}
#ifdef __HAIR__
}
#endif
}
CCL_NAMESPACE_END
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