blender/intern/cycles/kernel/svm/svm_tex_coord.h
Brecht Van Lommel c53b20b683 Cycles: window texture coordinates now work with orthographic cameras, this
was an old issue since the first version.
2013-06-08 10:51:33 +00:00

325 lines
8.8 KiB
C

/*
* 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
/* Texture Coordinate Node */
__device void svm_node_tex_coord(KernelGlobals *kg, ShaderData *sd, int path_flag, float *stack, uint type, uint out_offset)
{
float3 data;
switch(type) {
case NODE_TEXCO_OBJECT: {
if(sd->object != ~0) {
data = sd->P;
object_inverse_position_transform(kg, sd, &data);
}
else
data = sd->P;
break;
}
case NODE_TEXCO_NORMAL: {
if(sd->object != ~0) {
data = sd->N;
object_inverse_normal_transform(kg, sd, &data);
}
else
data = sd->N;
break;
}
case NODE_TEXCO_CAMERA: {
Transform tfm = kernel_data.cam.worldtocamera;
if(sd->object != ~0)
data = transform_point(&tfm, sd->P);
else
data = transform_point(&tfm, sd->P + camera_position(kg));
break;
}
case NODE_TEXCO_WINDOW: {
if((path_flag & PATH_RAY_CAMERA) && sd->object == ~0 && kernel_data.cam.type == CAMERA_ORTHOGRAPHIC)
data = camera_world_to_ndc(kg, sd, sd->ray_P);
else
data = camera_world_to_ndc(kg, sd, sd->P);
data.z = 0.0f;
break;
}
case NODE_TEXCO_REFLECTION: {
if(sd->object != ~0)
data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
else
data = sd->I;
break;
}
case NODE_TEXCO_DUPLI_GENERATED: {
data = object_dupli_generated(kg, sd->object);
break;
}
case NODE_TEXCO_DUPLI_UV: {
data = object_dupli_uv(kg, sd->object);
break;
}
}
stack_store_float3(stack, out_offset, data);
}
__device void svm_node_tex_coord_bump_dx(KernelGlobals *kg, ShaderData *sd, int path_flag, float *stack, uint type, uint out_offset)
{
#ifdef __RAY_DIFFERENTIALS__
float3 data;
switch(type) {
case NODE_TEXCO_OBJECT: {
if(sd->object != ~0) {
data = sd->P + sd->dP.dx;
object_inverse_position_transform(kg, sd, &data);
}
else
data = sd->P + sd->dP.dx;
break;
}
case NODE_TEXCO_NORMAL: {
if(sd->object != ~0) {
data = sd->N;
object_inverse_normal_transform(kg, sd, &data);
}
else
data = sd->N;
break;
}
case NODE_TEXCO_CAMERA: {
Transform tfm = kernel_data.cam.worldtocamera;
if(sd->object != ~0)
data = transform_point(&tfm, sd->P + sd->dP.dx);
else
data = transform_point(&tfm, sd->P + sd->dP.dx + camera_position(kg));
break;
}
case NODE_TEXCO_WINDOW: {
if((path_flag & PATH_RAY_CAMERA) && sd->object == ~0 && kernel_data.cam.type == CAMERA_ORTHOGRAPHIC)
data = camera_world_to_ndc(kg, sd, sd->ray_P + sd->ray_dP.dx);
else
data = camera_world_to_ndc(kg, sd, sd->P + sd->dP.dx);
data.z = 0.0f;
break;
}
case NODE_TEXCO_REFLECTION: {
if(sd->object != ~0)
data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
else
data = sd->I;
break;
}
case NODE_TEXCO_DUPLI_GENERATED: {
data = object_dupli_generated(kg, sd->object);
break;
}
case NODE_TEXCO_DUPLI_UV: {
data = object_dupli_uv(kg, sd->object);
break;
}
}
stack_store_float3(stack, out_offset, data);
#else
svm_node_tex_coord(kg, sd, stack, type, out_offset);
#endif
}
__device void svm_node_tex_coord_bump_dy(KernelGlobals *kg, ShaderData *sd, int path_flag, float *stack, uint type, uint out_offset)
{
#ifdef __RAY_DIFFERENTIALS__
float3 data;
switch(type) {
case NODE_TEXCO_OBJECT: {
if(sd->object != ~0) {
data = sd->P + sd->dP.dy;
object_inverse_position_transform(kg, sd, &data);
}
else
data = sd->P + sd->dP.dy;
break;
}
case NODE_TEXCO_NORMAL: {
if(sd->object != ~0) {
data = sd->N;
object_inverse_normal_transform(kg, sd, &data);
}
else
data = sd->N;
break;
}
case NODE_TEXCO_CAMERA: {
Transform tfm = kernel_data.cam.worldtocamera;
if(sd->object != ~0)
data = transform_point(&tfm, sd->P + sd->dP.dy);
else
data = transform_point(&tfm, sd->P + sd->dP.dy + camera_position(kg));
break;
}
case NODE_TEXCO_WINDOW: {
if((path_flag & PATH_RAY_CAMERA) && sd->object == ~0 && kernel_data.cam.type == CAMERA_ORTHOGRAPHIC)
data = camera_world_to_ndc(kg, sd, sd->ray_P + sd->ray_dP.dy);
else
data = camera_world_to_ndc(kg, sd, sd->P + sd->dP.dy);
data.z = 0.0f;
break;
}
case NODE_TEXCO_REFLECTION: {
if(sd->object != ~0)
data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
else
data = sd->I;
break;
}
case NODE_TEXCO_DUPLI_GENERATED: {
data = object_dupli_generated(kg, sd->object);
break;
}
case NODE_TEXCO_DUPLI_UV: {
data = object_dupli_uv(kg, sd->object);
break;
}
}
stack_store_float3(stack, out_offset, data);
#else
svm_node_tex_coord(kg, sd, stack, type, out_offset);
#endif
}
__device void svm_node_normal_map(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
uint color_offset, strength_offset, normal_offset, space;
decode_node_uchar4(node.y, &color_offset, &strength_offset, &normal_offset, &space);
float3 color = stack_load_float3(stack, color_offset);
color = 2.0f*make_float3(color.x - 0.5f, color.y - 0.5f, color.z - 0.5f);
float3 N;
if(space == NODE_NORMAL_MAP_TANGENT) {
/* tangent space */
if(sd->object == ~0) {
stack_store_float3(stack, normal_offset, make_float3(0.0f, 0.0f, 0.0f));
return;
}
/* first try to get tangent attribute */
AttributeElement attr_elem, attr_sign_elem, attr_normal_elem;
int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
int attr_sign_offset = find_attribute(kg, sd, node.w, &attr_sign_elem);
int attr_normal_offset = find_attribute(kg, sd, ATTR_STD_VERTEX_NORMAL, &attr_normal_elem);
if(attr_offset == ATTR_STD_NOT_FOUND || attr_sign_offset == ATTR_STD_NOT_FOUND || attr_normal_offset == ATTR_STD_NOT_FOUND) {
stack_store_float3(stack, normal_offset, make_float3(0.0f, 0.0f, 0.0f));
return;
}
/* get _unnormalized_ interpolated normal and tangent */
float3 tangent = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
float sign = primitive_attribute_float(kg, sd, attr_sign_elem, attr_sign_offset, NULL, NULL);
float3 normal;
if(sd->shader & SHADER_SMOOTH_NORMAL)
normal = primitive_attribute_float3(kg, sd, attr_normal_elem, attr_normal_offset, NULL, NULL);
else
normal = sd->N;
/* apply normal map */
float3 B = sign * cross(normal, tangent);
N = normalize(color.x * tangent + color.y * B + color.z * normal);
/* transform to world space */
object_normal_transform(kg, sd, &N);
}
else {
/* strange blender convention */
if(space == NODE_NORMAL_MAP_BLENDER_OBJECT || space == NODE_NORMAL_MAP_BLENDER_WORLD) {
color.y = -color.y;
color.z = -color.z;
}
/* object, world space */
N = color;
if(space == NODE_NORMAL_MAP_OBJECT || space == NODE_NORMAL_MAP_BLENDER_OBJECT)
object_normal_transform(kg, sd, &N);
else
N = normalize(N);
}
float strength = stack_load_float(stack, strength_offset);
if(strength != 1.0f) {
strength = max(strength, 0.0f);
N = normalize(sd->N + (N - sd->N)*strength);
}
stack_store_float3(stack, normal_offset, N);
}
__device void svm_node_tangent(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
{
uint tangent_offset, direction_type, axis;
decode_node_uchar4(node.y, &tangent_offset, &direction_type, &axis, NULL);
float3 tangent;
if(direction_type == NODE_TANGENT_UVMAP) {
/* UV map */
AttributeElement attr_elem;
int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
if(attr_offset == ATTR_STD_NOT_FOUND)
tangent = make_float3(0.0f, 0.0f, 0.0f);
else
tangent = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
}
else {
/* radial */
AttributeElement attr_elem;
int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
float3 generated;
if(attr_offset == ATTR_STD_NOT_FOUND)
generated = sd->P;
else
generated = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
if(axis == NODE_TANGENT_AXIS_X)
tangent = make_float3(0.0f, -(generated.z - 0.5f), (generated.y - 0.5f));
else if(axis == NODE_TANGENT_AXIS_Y)
tangent = make_float3(-(generated.z - 0.5f), 0.0f, (generated.x - 0.5f));
else
tangent = make_float3(-(generated.y - 0.5f), (generated.x - 0.5f), 0.0f);
}
object_normal_transform(kg, sd, &tangent);
tangent = cross(sd->N, normalize(cross(tangent, sd->N)));
stack_store_float3(stack, tangent_offset, tangent);
}
CCL_NAMESPACE_END