diff options
Diffstat (limited to 'intern/cycles/kernel/kernel_triangle.h')
| -rw-r--r-- | intern/cycles/kernel/kernel_triangle.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/intern/cycles/kernel/kernel_triangle.h b/intern/cycles/kernel/kernel_triangle.h index 7eaf54d14bf..1b3956c1dd4 100644 --- a/intern/cycles/kernel/kernel_triangle.h +++ b/intern/cycles/kernel/kernel_triangle.h @@ -179,5 +179,68 @@ __device float3 triangle_attribute_float3(KernelGlobals *kg, const ShaderData *s } } +/* motion */ + +__device int triangle_find_attribute(KernelGlobals *kg, ShaderData *sd, uint id) +{ + /* find attribute by unique id */ + uint attr_offset = sd->object*kernel_data.bvh.attributes_map_stride; + uint4 attr_map = kernel_tex_fetch(__attributes_map, attr_offset); + + while(attr_map.x != id) + attr_map = kernel_tex_fetch(__attributes_map, ++attr_offset); + + /* return result */ + return (attr_map.y == ATTR_ELEMENT_NONE)? ATTR_STD_NOT_FOUND: attr_map.z; +} + +__device float4 triangle_motion_vector(KernelGlobals *kg, ShaderData *sd) +{ + float3 motion_pre = sd->P, motion_post = sd->P; + + /* deformation motion */ + int offset_pre = triangle_find_attribute(kg, sd, ATTR_STD_MOTION_PRE); + int offset_post = triangle_find_attribute(kg, sd, ATTR_STD_MOTION_POST); + + if(offset_pre != ATTR_STD_NOT_FOUND) + motion_pre = triangle_attribute_float3(kg, sd, ATTR_ELEMENT_VERTEX, offset_pre, NULL, NULL); + if(offset_post != ATTR_STD_NOT_FOUND) + motion_post = triangle_attribute_float3(kg, sd, ATTR_ELEMENT_VERTEX, offset_post, NULL, NULL); + + /* object motion. note that depending on the mesh having motion vectors, this + transformation was set match the world/object space of motion_pre/post */ + Transform tfm; + + tfm = object_fetch_transform(kg, sd->object, TIME_INVALID, OBJECT_TRANSFORM_MOTION_PRE); + motion_pre = transform_point(&tfm, motion_pre); + + tfm = object_fetch_transform(kg, sd->object, TIME_INVALID, OBJECT_TRANSFORM_MOTION_POST); + motion_post = transform_point(&tfm, motion_post); + + /* camera motion */ + tfm = kernel_data.cam.worldtoraster; + float3 P = transform_perspective(&tfm, sd->P); + + tfm = kernel_data.cam.motion.pre; + motion_pre = transform_perspective(&tfm, motion_pre) - P; + + tfm = kernel_data.cam.motion.post; + motion_post = P - transform_perspective(&tfm, motion_post); + + return make_float4(motion_pre.x, motion_pre.y, motion_post.x, motion_post.y); +} + +__device float3 triangle_uv(KernelGlobals *kg, ShaderData *sd) +{ + int offset_uv = triangle_find_attribute(kg, sd, ATTR_STD_UV); + + if(offset_uv == ATTR_STD_NOT_FOUND) + return make_float3(0.0f, 0.0f, 0.0f); + + float3 uv = triangle_attribute_float3(kg, sd, ATTR_ELEMENT_CORNER, offset_uv, NULL, NULL); + uv.z = 1.0f; + return uv; +} + CCL_NAMESPACE_END |