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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
/* Geometry Node */
__device void svm_node_geometry(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
{
float3 data;
switch(type) {
case NODE_GEOM_P: data = sd->P; break;
case NODE_GEOM_N: data = sd->N; break;
#ifdef __DPDU__
case NODE_GEOM_T: {
/* try to create spherical tangent from generated coordinates */
int attr_offset = (sd->object != ~0)? find_attribute(kg, sd, ATTR_STD_GENERATED): ATTR_STD_NOT_FOUND;
if(attr_offset != ATTR_STD_NOT_FOUND) {
data = triangle_attribute_float3(kg, sd, ATTR_ELEMENT_VERTEX, attr_offset, NULL, NULL);
data = make_float3(-(data.y - 0.5f), (data.x - 0.5f), 0.0f);
object_normal_transform(kg, sd, &data);
data = cross(sd->N, normalize(cross(data, sd->N)));;
}
else {
/* otherwise use surface derivatives */
data = normalize(sd->dPdu);
}
break;
}
#endif
case NODE_GEOM_I: data = sd->I; break;
case NODE_GEOM_Ng: data = sd->Ng; break;
#ifdef __UV__
case NODE_GEOM_uv: data = make_float3(sd->u, sd->v, 0.0f); break;
#endif
}
stack_store_float3(stack, out_offset, data);
}
__device void svm_node_geometry_bump_dx(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
{
#ifdef __RAY_DIFFERENTIALS__
float3 data;
switch(type) {
case NODE_GEOM_P: data = sd->P + sd->dP.dx; break;
case NODE_GEOM_uv: data = make_float3(sd->u + sd->du.dx, sd->v + sd->dv.dx, 0.0f); break;
default: svm_node_geometry(kg, sd, stack, type, out_offset); return;
}
stack_store_float3(stack, out_offset, data);
#else
svm_node_geometry(kg, sd, stack, type, out_offset);
#endif
}
__device void svm_node_geometry_bump_dy(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
{
#ifdef __RAY_DIFFERENTIALS__
float3 data;
switch(type) {
case NODE_GEOM_P: data = sd->P + sd->dP.dy; break;
case NODE_GEOM_uv: data = make_float3(sd->u + sd->du.dy, sd->v + sd->dv.dy, 0.0f); break;
default: svm_node_geometry(kg, sd, stack, type, out_offset); return;
}
stack_store_float3(stack, out_offset, data);
#else
svm_node_geometry(kg, sd, stack, type, out_offset);
#endif
}
/* Object Info */
__device void svm_node_object_info(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
{
float data;
switch(type) {
case NODE_INFO_OB_LOCATION: {
stack_store_float3(stack, out_offset, object_location(kg, sd));
return;
}
case NODE_INFO_OB_INDEX: data = object_pass_id(kg, sd->object); break;
case NODE_INFO_MAT_INDEX: data = shader_pass_id(kg, sd); break;
case NODE_INFO_OB_RANDOM: data = object_random_number(kg, sd->object); break;
default: data = 0.0f; break;
}
stack_store_float(stack, out_offset, data);
}
/* Particle Info */
__device void svm_node_particle_info(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
{
switch(type) {
case NODE_INFO_PAR_INDEX: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float(stack, out_offset, particle_index(kg, particle_id));
break;
}
case NODE_INFO_PAR_AGE: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float(stack, out_offset, particle_age(kg, particle_id));
break;
}
case NODE_INFO_PAR_LIFETIME: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float(stack, out_offset, particle_lifetime(kg, particle_id));
break;
}
case NODE_INFO_PAR_LOCATION: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float3(stack, out_offset, particle_location(kg, particle_id));
break;
}
#if 0 /* XXX float4 currently not supported in SVM stack */
case NODE_INFO_PAR_ROTATION: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float4(stack, out_offset, particle_rotation(kg, particle_id));
break;
}
#endif
case NODE_INFO_PAR_SIZE: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float(stack, out_offset, particle_size(kg, particle_id));
break;
}
case NODE_INFO_PAR_VELOCITY: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float3(stack, out_offset, particle_velocity(kg, particle_id));
break;
}
case NODE_INFO_PAR_ANGULAR_VELOCITY: {
uint particle_id = object_particle_id(kg, sd->object);
stack_store_float3(stack, out_offset, particle_angular_velocity(kg, particle_id));
break;
}
}
}
CCL_NAMESPACE_END
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