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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
enum ObjectTransform {
OBJECT_TRANSFORM = 0,
OBJECT_INVERSE_TRANSFORM = 4,
OBJECT_NORMAL_TRANSFORM = 8,
OBJECT_PROPERTIES = 12
};
__device_inline Transform object_fetch_transform(KernelGlobals *kg, int object, enum ObjectTransform type)
{
Transform tfm;
int offset = object*OBJECT_SIZE + (int)type;
tfm.x = kernel_tex_fetch(__objects, offset + 0);
tfm.y = kernel_tex_fetch(__objects, offset + 1);
tfm.z = kernel_tex_fetch(__objects, offset + 2);
tfm.w = kernel_tex_fetch(__objects, offset + 3);
return tfm;
}
__device_inline void object_position_transform(KernelGlobals *kg, int object, float3 *P)
{
Transform tfm = object_fetch_transform(kg, object, OBJECT_TRANSFORM);
*P = transform(&tfm, *P);
}
__device_inline void object_normal_transform(KernelGlobals *kg, int object, float3 *N)
{
Transform tfm = object_fetch_transform(kg, object, OBJECT_NORMAL_TRANSFORM);
*N = normalize(transform_direction(&tfm, *N));
}
__device_inline void object_dir_transform(KernelGlobals *kg, int object, float3 *D)
{
Transform tfm = object_fetch_transform(kg, object, OBJECT_TRANSFORM);
*D = transform_direction(&tfm, *D);
}
__device_inline float object_surface_area(KernelGlobals *kg, int object)
{
int offset = object*OBJECT_SIZE + OBJECT_PROPERTIES;
float4 f = kernel_tex_fetch(__objects, offset);
return f.x;
}
CCL_NAMESPACE_END
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