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99f5993088
blender/intern/cycles/kernel/geom/geom_object.h
Brecht Van Lommel 99f5993088 Cycles code refactor: improve vertex motion attribute storage and export. 
This now supports multiple steps and subframe sampling of motion.

There is one difference for object and camera transform motion blur. It still
only supports two steps there, but the transforms are now sampled at subframe
times instead of the previous and next frame and then interpolated/extrapolated.
This will give different render results in some cases but it's more accurate.

Part of the code is from the summer of code project by Gavin Howard, but it has
been significantly rewritten and extended.
2014-03-29 13:03:46 +01:00

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/*
* 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
enum ObjectTransform {
OBJECT_TRANSFORM = 0,
OBJECT_TRANSFORM_MOTION_PRE = 0,
OBJECT_INVERSE_TRANSFORM = 4,
OBJECT_TRANSFORM_MOTION_POST = 4,
OBJECT_PROPERTIES = 8,
OBJECT_DUPLI = 9
};
enum ObjectVectorTransform {
OBJECT_VECTOR_MOTION_PRE = 0,
OBJECT_VECTOR_MOTION_POST = 3
};
ccl_device_inline Transform object_fetch_transform(KernelGlobals *kg, int object, enum ObjectTransform type)
{
int offset = object*OBJECT_SIZE + (int)type;
Transform tfm;
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 = make_float4(0.0f, 0.0f, 0.0f, 1.0f);
return tfm;
}
ccl_device_inline Transform object_fetch_vector_transform(KernelGlobals *kg, int object, enum ObjectVectorTransform type)
{
int offset = object*OBJECT_VECTOR_SIZE + (int)type;
Transform tfm;
tfm.x = kernel_tex_fetch(__objects_vector, offset + 0);
tfm.y = kernel_tex_fetch(__objects_vector, offset + 1);
tfm.z = kernel_tex_fetch(__objects_vector, offset + 2);
tfm.w = make_float4(0.0f, 0.0f, 0.0f, 1.0f);
return tfm;
}
#ifdef __OBJECT_MOTION__
ccl_device_inline Transform object_fetch_transform_motion(KernelGlobals *kg, int object, float time)
{
DecompMotionTransform motion;
int offset = object*OBJECT_SIZE + (int)OBJECT_TRANSFORM_MOTION_PRE;
motion.mid.x = kernel_tex_fetch(__objects, offset + 0);
motion.mid.y = kernel_tex_fetch(__objects, offset + 1);
motion.mid.z = kernel_tex_fetch(__objects, offset + 2);
motion.mid.w = kernel_tex_fetch(__objects, offset + 3);
motion.pre_x = kernel_tex_fetch(__objects, offset + 4);
motion.pre_y = kernel_tex_fetch(__objects, offset + 5);
motion.post_x = kernel_tex_fetch(__objects, offset + 6);
motion.post_y = kernel_tex_fetch(__objects, offset + 7);
Transform tfm;
transform_motion_interpolate(&tfm, &motion, time);
return tfm;
}
ccl_device_inline Transform object_fetch_transform_motion_test(KernelGlobals *kg, int object, float time, Transform *itfm)
{
int object_flag = kernel_tex_fetch(__object_flag, object);
if(object_flag & SD_OBJECT_MOTION) {
/* if we do motion blur */
Transform tfm = object_fetch_transform_motion(kg, object, time);
if(itfm)
*itfm = transform_quick_inverse(tfm);
return tfm;
}
else {
Transform tfm = object_fetch_transform(kg, object, OBJECT_TRANSFORM);
if(itfm)
*itfm = object_fetch_transform(kg, object, OBJECT_INVERSE_TRANSFORM);
return tfm;
}
}
#endif
ccl_device_inline void object_position_transform(KernelGlobals *kg, ShaderData *sd, float3 *P)
{
#ifdef __OBJECT_MOTION__
*P = transform_point(&sd->ob_tfm, *P);
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_TRANSFORM);
*P = transform_point(&tfm, *P);
#endif
}
ccl_device_inline void object_inverse_position_transform(KernelGlobals *kg, ShaderData *sd, float3 *P)
{
#ifdef __OBJECT_MOTION__
*P = transform_point(&sd->ob_itfm, *P);
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_INVERSE_TRANSFORM);
*P = transform_point(&tfm, *P);
#endif
}
ccl_device_inline void object_inverse_normal_transform(KernelGlobals *kg, ShaderData *sd, float3 *N)
{
#ifdef __OBJECT_MOTION__
*N = normalize(transform_direction_transposed(&sd->ob_tfm, *N));
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_TRANSFORM);
*N = normalize(transform_direction_transposed(&tfm, *N));
#endif
}
ccl_device_inline void object_normal_transform(KernelGlobals *kg, ShaderData *sd, float3 *N)
{
#ifdef __OBJECT_MOTION__
*N = normalize(transform_direction_transposed(&sd->ob_itfm, *N));
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_INVERSE_TRANSFORM);
*N = normalize(transform_direction_transposed(&tfm, *N));
#endif
}
ccl_device_inline void object_dir_transform(KernelGlobals *kg, ShaderData *sd, float3 *D)
{
#ifdef __OBJECT_MOTION__
*D = transform_direction(&sd->ob_tfm, *D);
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_TRANSFORM);
*D = transform_direction(&tfm, *D);
#endif
}
ccl_device_inline void object_inverse_dir_transform(KernelGlobals *kg, ShaderData *sd, float3 *D)
{
#ifdef __OBJECT_MOTION__
*D = transform_direction(&sd->ob_itfm, *D);
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_INVERSE_TRANSFORM);
*D = transform_direction(&tfm, *D);
#endif
}
ccl_device_inline float3 object_location(KernelGlobals *kg, ShaderData *sd)
{
if(sd->object == ~0)
return make_float3(0.0f, 0.0f, 0.0f);
#ifdef __OBJECT_MOTION__
return make_float3(sd->ob_tfm.x.w, sd->ob_tfm.y.w, sd->ob_tfm.z.w);
#else
Transform tfm = object_fetch_transform(kg, sd->object, OBJECT_TRANSFORM);
return make_float3(tfm.x.w, tfm.y.w, tfm.z.w);
#endif
}
ccl_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_device_inline float object_pass_id(KernelGlobals *kg, int object)
{
if(object == ~0)
return 0.0f;
int offset = object*OBJECT_SIZE + OBJECT_PROPERTIES;
float4 f = kernel_tex_fetch(__objects, offset);
return f.y;
}
ccl_device_inline float object_random_number(KernelGlobals *kg, int object)
{
if(object == ~0)
return 0.0f;
int offset = object*OBJECT_SIZE + OBJECT_PROPERTIES;
float4 f = kernel_tex_fetch(__objects, offset);
return f.z;
}
ccl_device_inline uint object_particle_id(KernelGlobals *kg, int object)
{
if(object == ~0)
return 0.0f;
int offset = object*OBJECT_SIZE + OBJECT_PROPERTIES;
float4 f = kernel_tex_fetch(__objects, offset);
return __float_as_uint(f.w);
}
ccl_device_inline float3 object_dupli_generated(KernelGlobals *kg, int object)
{
if(object == ~0)
return make_float3(0.0f, 0.0f, 0.0f);
int offset = object*OBJECT_SIZE + OBJECT_DUPLI;
float4 f = kernel_tex_fetch(__objects, offset);
return make_float3(f.x, f.y, f.z);
}
ccl_device_inline float3 object_dupli_uv(KernelGlobals *kg, int object)
{
if(object == ~0)
return make_float3(0.0f, 0.0f, 0.0f);
int offset = object*OBJECT_SIZE + OBJECT_DUPLI;
float4 f = kernel_tex_fetch(__objects, offset + 1);
return make_float3(f.x, f.y, 0.0f);
}
ccl_device_inline void object_motion_info(KernelGlobals *kg, int object, int *numsteps, int *numverts, int *numkeys)
{
int offset = object*OBJECT_SIZE + OBJECT_DUPLI;
if(numkeys) {
float4 f = kernel_tex_fetch(__objects, offset);
*numkeys = __float_as_int(f.w);
}
float4 f = kernel_tex_fetch(__objects, offset + 1);
if(numsteps)
*numsteps = __float_as_int(f.z);
if(numverts)
*numverts = __float_as_int(f.w);
}
ccl_device int shader_pass_id(KernelGlobals *kg, ShaderData *sd)
{
return kernel_tex_fetch(__shader_flag, (sd->shader & SHADER_MASK)*2 + 1);
}
ccl_device_inline float particle_index(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 0);
return f.x;
}
ccl_device float particle_age(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 0);
return f.y;
}
ccl_device float particle_lifetime(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 0);
return f.z;
}
ccl_device float particle_size(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 0);
return f.w;
}
ccl_device float4 particle_rotation(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 1);
return f;
}
ccl_device float3 particle_location(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f = kernel_tex_fetch(__particles, offset + 2);
return make_float3(f.x, f.y, f.z);
}
ccl_device float3 particle_velocity(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f2 = kernel_tex_fetch(__particles, offset + 2);
float4 f3 = kernel_tex_fetch(__particles, offset + 3);
return make_float3(f2.w, f3.x, f3.y);
}
ccl_device float3 particle_angular_velocity(KernelGlobals *kg, int particle)
{
int offset = particle*PARTICLE_SIZE;
float4 f3 = kernel_tex_fetch(__particles, offset + 3);
float4 f4 = kernel_tex_fetch(__particles, offset + 4);
return make_float3(f3.z, f3.w, f4.x);
}
/* BVH */
ccl_device_inline float3 bvh_inverse_direction(float3 dir)
{
/* avoid divide by zero (ooeps = exp2f(-80.0f)) */
float ooeps = 0.00000000000000000000000082718061255302767487140869206996285356581211090087890625f;
float3 idir;
idir.x = 1.0f/((fabsf(dir.x) > ooeps)? dir.x: copysignf(ooeps, dir.x));
idir.y = 1.0f/((fabsf(dir.y) > ooeps)? dir.y: copysignf(ooeps, dir.y));
idir.z = 1.0f/((fabsf(dir.z) > ooeps)? dir.z: copysignf(ooeps, dir.z));
return idir;
}
ccl_device_inline void bvh_instance_push(KernelGlobals *kg, int object, const Ray *ray, float3 *P, float3 *idir, float *t, const float tmax)
{
Transform tfm = object_fetch_transform(kg, object, OBJECT_INVERSE_TRANSFORM);
*P = transform_point(&tfm, ray->P);
float3 dir = transform_direction(&tfm, ray->D);
float len;
dir = normalize_len(dir, &len);
*idir = bvh_inverse_direction(dir);
if(*t != FLT_MAX)
*t *= len;
}
ccl_device_inline void bvh_instance_pop(KernelGlobals *kg, int object, const Ray *ray, float3 *P, float3 *idir, float *t, const float tmax)
{
if(*t != FLT_MAX) {
Transform tfm = object_fetch_transform(kg, object, OBJECT_TRANSFORM);
*t *= len(transform_direction(&tfm, 1.0f/(*idir)));
}
*P = ray->P;
*idir = bvh_inverse_direction(ray->D);
}
#ifdef __OBJECT_MOTION__
ccl_device_inline void bvh_instance_motion_push(KernelGlobals *kg, int object, const Ray *ray, float3 *P, float3 *idir, float *t, Transform *tfm, const float tmax)
{
Transform itfm;
*tfm = object_fetch_transform_motion_test(kg, object, ray->time, &itfm);
*P = transform_point(&itfm, ray->P);
float3 dir = transform_direction(&itfm, ray->D);
float len;
dir = normalize_len(dir, &len);
*idir = bvh_inverse_direction(dir);
if(*t != FLT_MAX)
*t *= len;
}
ccl_device_inline void bvh_instance_motion_pop(KernelGlobals *kg, int object, const Ray *ray, float3 *P, float3 *idir, float *t, Transform *tfm, const float tmax)
{
if(*t != FLT_MAX)
*t *= len(transform_direction(tfm, 1.0f/(*idir)));
*P = ray->P;
*idir = bvh_inverse_direction(ray->D);
}
#endif
CCL_NAMESPACE_END
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