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blender/intern/cycles/kernel/geom/geom_attribute.h

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Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
CCL_NAMESPACE_BEGIN
/* Attributes
*
* We support an arbitrary number of attributes on various mesh elements.
* On vertices, triangles, curve keys, curves, meshes and volume grids.
* Most of the code for attribute reading is in the primitive files.
*
* Lookup of attributes is different between OSL and SVM, as OSL is ustring
* based while for SVM we use integer ids. */
/* Find attribute based on ID */
ccl_device_inline int find_attribute(KernelGlobals *kg, const ShaderData *sd, uint id, AttributeElement *elem)
{
if(sd->object == PRIM_NONE)
return (int)ATTR_STD_NOT_FOUND;
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
/* for SVM, find attribute by unique id */
uint attr_offset = sd->object*kernel_data.bvh.attributes_map_stride;
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
#ifdef __HAIR__
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
attr_offset = (sd->type & PRIMITIVE_ALL_CURVE)? attr_offset + ATTR_PRIM_CURVE: attr_offset;
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
#endif
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
uint4 attr_map = kernel_tex_fetch(__attributes_map, attr_offset);
while(attr_map.x != id) {
attr_offset += ATTR_PRIM_TYPES;
attr_map = kernel_tex_fetch(__attributes_map, attr_offset);
}
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
*elem = (AttributeElement)attr_map.y;
if(sd->prim == PRIM_NONE && (AttributeElement)attr_map.y != ATTR_ELEMENT_MESH)
return ATTR_STD_NOT_FOUND;
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
/* return result */
return (attr_map.y == ATTR_ELEMENT_NONE) ? (int)ATTR_STD_NOT_FOUND : (int)attr_map.z;
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
}
Cycles code internals: add support for mesh voxel grid attributes. These are internally stored as a 3D image textures, but accessible like e.g. UV coordinates though the attribute node and getattribute(). This is convenient for rendering e.g. smoke objects where data like density is really a property of the mesh, and it avoids having to specify the smoke object in a texture node, instead the material will work with any smoke domain.
2014-03-29 12:03:48 +00:00
/* Transform matrix attribute on meshes */
Cycles code refactor: move more code to geom folder, add some comments.
2014-03-29 12:03:48 +00:00
ccl_device Transform primitive_attribute_matrix(KernelGlobals *kg, const ShaderData *sd, int offset)
{
Transform tfm;
tfm.x = kernel_tex_fetch(__attributes_float3, offset + 0);
tfm.y = kernel_tex_fetch(__attributes_float3, offset + 1);
tfm.z = kernel_tex_fetch(__attributes_float3, offset + 2);
tfm.w = kernel_tex_fetch(__attributes_float3, offset + 3);
return tfm;
}
CCL_NAMESPACE_END
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