blender/intern/cycles/kernel/svm/svm_camera.h

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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
__device void svm_node_camera(KernelGlobals *kg, ShaderData *sd, float *stack, uint out_vector, uint out_zdepth, uint out_distance)
{
float distance;
float zdepth;
float3 vector;
Transform tfm = kernel_data.cam.worldtocamera;
vector = transform(&tfm, sd->P);
zdepth = vector.z;
distance = len(vector);
if (stack_valid(out_vector))
stack_store_float3(stack, out_vector, normalize(vector));
if (stack_valid(out_zdepth))
stack_store_float(stack, out_zdepth, zdepth);
if (stack_valid(out_distance))
stack_store_float(stack, out_distance, distance);
}
CCL_NAMESPACE_END