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/*
* Copyright 2013, 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
/* Vector Transform */
__device void svm_node_vector_transform(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
uint itype, ifrom, ito;
uint vector_in, vector_out;
decode_node_uchar4(node.y, &itype, &ifrom, &ito, NULL);
decode_node_uchar4(node.z, &vector_in, &vector_out, NULL, NULL);
float3 in = stack_load_float3(stack, vector_in);
NodeVectorTransformType type = (NodeVectorTransformType)itype;
NodeVectorTransformConvertSpace from = (NodeVectorTransformConvertSpace)ifrom;
NodeVectorTransformConvertSpace to = (NodeVectorTransformConvertSpace)ito;
Transform tfm;
bool is_object = (sd->object != ~0);
bool is_direction = (type == NODE_VECTOR_TRANSFORM_TYPE_VECTOR || type == NODE_VECTOR_TRANSFORM_TYPE_NORMAL);
/* From world */
if(from == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_WORLD) {
if(to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_CAMERA) {
tfm = kernel_data.cam.worldtocamera;
if(is_direction)
in = transform_direction(&tfm, in);
else
in = transform_point(&tfm, in);
}
else if (to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_OBJECT && is_object) {
if(is_direction)
object_inverse_dir_transform(kg, sd, &in);
else
object_inverse_position_transform(kg, sd, &in);
}
}
/* From camera */
else if (from == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_CAMERA) {
if(to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_WORLD || to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_OBJECT) {
tfm = kernel_data.cam.cameratoworld;
if(is_direction)
in = transform_direction(&tfm, in);
else
in = transform_point(&tfm, in);
}
if(to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_OBJECT && is_object) {
if(is_direction)
object_inverse_dir_transform(kg, sd, &in);
else
object_inverse_position_transform(kg, sd, &in);
}
}
/* From object */
else if(from == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_OBJECT) {
if((to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_WORLD || to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_CAMERA) && is_object) {
if(is_direction)
object_dir_transform(kg, sd, &in);
else
object_position_transform(kg, sd, &in);
}
if(to == NODE_VECTOR_TRANSFORM_CONVERT_SPACE_CAMERA) {
tfm = kernel_data.cam.worldtocamera;
if(is_direction)
in = transform_direction(&tfm, in);
else
in = transform_point(&tfm, in);
}
}
/* Normalize Normal */
if(type == NODE_VECTOR_TRANSFORM_TYPE_NORMAL)
in = normalize(in);
/* Output */
if(stack_valid(vector_out)) {
stack_store_float3(stack, vector_out, in);
}
}
CCL_NAMESPACE_END
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