blender/intern/cycles/kernel/geom/geom_primitive.h
Sergey Sharybin d06b1a5d8b Cycles: Missed some changes in the previous hair motion blur fix
So now cases when object has both hair motion blur and deformation motion blur
vector pass is all correct.

We could get rid of the flag in the future, still need to look deeper into all
the areas trying to find a more clear solution.
2014-11-19 02:42:22 +05:00

235 lines
7.1 KiB
C

/*
* 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
*/
/* Primitive Utilities
*
* Generic functions to look up mesh, curve and volume primitive attributes for
* shading and render passes. */
CCL_NAMESPACE_BEGIN
/* Generic primitive attribute reading functions */
ccl_device float primitive_attribute_float(KernelGlobals *kg, const ShaderData *sd, AttributeElement elem, int offset, float *dx, float *dy)
{
if(sd->type & PRIMITIVE_ALL_TRIANGLE) {
return triangle_attribute_float(kg, sd, elem, offset, dx, dy);
}
#ifdef __HAIR__
else if(sd->type & PRIMITIVE_ALL_CURVE) {
return curve_attribute_float(kg, sd, elem, offset, dx, dy);
}
#endif
#ifdef __VOLUME__
else if(sd->object != OBJECT_NONE && elem == ATTR_ELEMENT_VOXEL) {
return volume_attribute_float(kg, sd, elem, offset, dx, dy);
}
#endif
else {
if(dx) *dx = 0.0f;
if(dy) *dy = 0.0f;
return 0.0f;
}
}
ccl_device float3 primitive_attribute_float3(KernelGlobals *kg, const ShaderData *sd, AttributeElement elem, int offset, float3 *dx, float3 *dy)
{
if(sd->type & PRIMITIVE_ALL_TRIANGLE) {
return triangle_attribute_float3(kg, sd, elem, offset, dx, dy);
}
#ifdef __HAIR__
else if(sd->type & PRIMITIVE_ALL_CURVE) {
return curve_attribute_float3(kg, sd, elem, offset, dx, dy);
}
#endif
#ifdef __VOLUME__
else if(sd->object != OBJECT_NONE && elem == ATTR_ELEMENT_VOXEL) {
return volume_attribute_float3(kg, sd, elem, offset, dx, dy);
}
#endif
else {
if(dx) *dx = make_float3(0.0f, 0.0f, 0.0f);
if(dy) *dy = make_float3(0.0f, 0.0f, 0.0f);
return make_float3(0.0f, 0.0f, 0.0f);
}
}
/* Default UV coordinate */
ccl_device float3 primitive_uv(KernelGlobals *kg, ShaderData *sd)
{
AttributeElement elem_uv;
int offset_uv = find_attribute(kg, sd, ATTR_STD_UV, &elem_uv);
if(offset_uv == ATTR_STD_NOT_FOUND)
return make_float3(0.0f, 0.0f, 0.0f);
float3 uv = primitive_attribute_float3(kg, sd, elem_uv, offset_uv, NULL, NULL);
uv.z = 1.0f;
return uv;
}
/* Ptex coordinates */
ccl_device bool primitive_ptex(KernelGlobals *kg, ShaderData *sd, float2 *uv, int *face_id)
{
/* storing ptex data as attributes is not memory efficient but simple for tests */
AttributeElement elem_face_id, elem_uv;
int offset_face_id = find_attribute(kg, sd, ATTR_STD_PTEX_FACE_ID, &elem_face_id);
int offset_uv = find_attribute(kg, sd, ATTR_STD_PTEX_UV, &elem_uv);
if(offset_face_id == ATTR_STD_NOT_FOUND || offset_uv == ATTR_STD_NOT_FOUND)
return false;
float3 uv3 = primitive_attribute_float3(kg, sd, elem_uv, offset_uv, NULL, NULL);
float face_id_f = primitive_attribute_float(kg, sd, elem_face_id, offset_face_id, NULL, NULL);
*uv = make_float2(uv3.x, uv3.y);
*face_id = (int)face_id_f;
return true;
}
/* Surface tangent */
ccl_device float3 primitive_tangent(KernelGlobals *kg, ShaderData *sd)
{
#ifdef __HAIR__
if(sd->type & PRIMITIVE_ALL_CURVE)
#ifdef __DPDU__
return normalize(sd->dPdu);
#else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
#endif
/* try to create spherical tangent from generated coordinates */
AttributeElement attr_elem;
int attr_offset = find_attribute(kg, sd, ATTR_STD_GENERATED, &attr_elem);
if(attr_offset != ATTR_STD_NOT_FOUND) {
float3 data = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
data = make_float3(-(data.y - 0.5f), (data.x - 0.5f), 0.0f);
object_normal_transform(kg, sd, &data);
return cross(sd->N, normalize(cross(data, sd->N)));
}
else {
/* otherwise use surface derivatives */
#ifdef __DPDU__
return normalize(sd->dPdu);
#else
return make_float3(0.0f, 0.0f, 0.0f);
#endif
}
}
/* Motion vector for motion pass */
ccl_device float4 primitive_motion_vector(KernelGlobals *kg, ShaderData *sd)
{
/* center position */
float3 center;
#ifdef __HAIR__
bool is_curve_primitive = sd->type & PRIMITIVE_ALL_CURVE;
if(is_curve_primitive) {
center = curve_motion_center_location(kg, sd);
if(!(sd->flag & SD_TRANSFORM_APPLIED))
object_position_transform(kg, sd, &center);
}
else
#endif
center = sd->P;
float3 motion_pre = center, motion_post = center;
/* deformation motion */
AttributeElement elem;
int offset = find_attribute(kg, sd, ATTR_STD_MOTION_VERTEX_POSITION, &elem);
if(offset != ATTR_STD_NOT_FOUND) {
/* get motion info */
int numverts, numkeys;
object_motion_info(kg, sd->object, NULL, &numverts, &numkeys);
/* lookup attributes */
int offset_next = (sd->type & PRIMITIVE_ALL_TRIANGLE)? offset + numverts: offset + numkeys;
motion_pre = primitive_attribute_float3(kg, sd, elem, offset, NULL, NULL);
motion_post = primitive_attribute_float3(kg, sd, elem, offset_next, NULL, NULL);
#ifdef __HAIR__
if(is_curve_primitive && (sd->flag & SD_OBJECT_HAS_VERTEX_MOTION) == 0) {
object_position_transform(kg, sd, &motion_pre);
object_position_transform(kg, sd, &motion_post);
}
#endif
}
/* 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_vector_transform(kg, sd->object, OBJECT_VECTOR_MOTION_PRE);
motion_pre = transform_point(&tfm, motion_pre);
tfm = object_fetch_vector_transform(kg, sd->object, OBJECT_VECTOR_MOTION_POST);
motion_post = transform_point(&tfm, motion_post);
float3 motion_center;
/* camera motion, for perspective/orthographic motion.pre/post will be a
* world-to-raster matrix, for panorama it's world-to-camera */
if (kernel_data.cam.type != CAMERA_PANORAMA) {
tfm = kernel_data.cam.worldtoraster;
motion_center = transform_perspective(&tfm, center);
tfm = kernel_data.cam.motion.pre;
motion_pre = transform_perspective(&tfm, motion_pre);
tfm = kernel_data.cam.motion.post;
motion_post = transform_perspective(&tfm, motion_post);
}
else {
tfm = kernel_data.cam.worldtocamera;
motion_center = normalize(transform_point(&tfm, center));
motion_center = float2_to_float3(direction_to_panorama(kg, motion_center));
motion_center.x *= kernel_data.cam.width;
motion_center.y *= kernel_data.cam.height;
tfm = kernel_data.cam.motion.pre;
motion_pre = normalize(transform_point(&tfm, motion_pre));
motion_pre = float2_to_float3(direction_to_panorama(kg, motion_pre));
motion_pre.x *= kernel_data.cam.width;
motion_pre.y *= kernel_data.cam.height;
tfm = kernel_data.cam.motion.post;
motion_post = normalize(transform_point(&tfm, motion_post));
motion_post = float2_to_float3(direction_to_panorama(kg, motion_post));
motion_post.x *= kernel_data.cam.width;
motion_post.y *= kernel_data.cam.height;
}
motion_pre = motion_pre - motion_center;
motion_post = motion_center - motion_post;
return make_float4(motion_pre.x, motion_pre.y, motion_post.x, motion_post.y);
}
CCL_NAMESPACE_END