forked from bartvdbraak/blender
345 lines
8.9 KiB
C
345 lines
8.9 KiB
C
/*
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* Copyright 2011, Blender Foundation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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CCL_NAMESPACE_BEGIN
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/* Texture Coordinate Node */
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__device_inline float3 svm_background_position(KernelGlobals *kg, float3 P)
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{
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Transform cameratoworld = kernel_data.cam.cameratoworld;
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float3 camP = make_float3(cameratoworld.x.w, cameratoworld.y.w, cameratoworld.z.w);
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return camP + P;
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}
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__device_inline float3 svm_world_to_ndc(KernelGlobals *kg, ShaderData *sd, float3 P)
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{
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if(kernel_data.cam.type != CAMERA_PANORAMA) {
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if(sd->object == ~0)
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P = svm_background_position(kg, P);
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Transform tfm = kernel_data.cam.worldtondc;
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return transform_perspective(&tfm, P);
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}
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else {
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Transform tfm = kernel_data.cam.worldtocamera;
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if(sd->object != ~0)
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P = normalize(transform_point(&tfm, P));
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else
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P = normalize(transform_direction(&tfm, P));
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float2 uv = direction_to_panorama(kg, P);
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return make_float3(uv.x, uv.y, 0.0f);
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}
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}
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__device void svm_node_tex_coord(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
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{
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float3 data;
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switch(type) {
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case NODE_TEXCO_OBJECT: {
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if(sd->object != ~0) {
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data = sd->P;
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object_inverse_position_transform(kg, sd, &data);
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}
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else
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data = sd->P;
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break;
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}
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case NODE_TEXCO_NORMAL: {
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if(sd->object != ~0) {
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data = sd->N;
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object_inverse_normal_transform(kg, sd, &data);
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}
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else
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data = sd->N;
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break;
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}
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case NODE_TEXCO_CAMERA: {
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Transform tfm = kernel_data.cam.worldtocamera;
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if(sd->object != ~0)
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data = transform_point(&tfm, sd->P);
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else
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data = transform_point(&tfm, svm_background_position(kg, sd->P));
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break;
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}
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case NODE_TEXCO_WINDOW: {
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data = svm_world_to_ndc(kg, sd, sd->P);
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data.z = 0.0f;
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break;
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}
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case NODE_TEXCO_REFLECTION: {
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if(sd->object != ~0)
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data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
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else
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data = sd->I;
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break;
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}
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case NODE_TEXCO_DUPLI_GENERATED: {
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data = object_dupli_generated(kg, sd->object);
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break;
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}
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case NODE_TEXCO_DUPLI_UV: {
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data = object_dupli_uv(kg, sd->object);
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break;
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}
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}
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stack_store_float3(stack, out_offset, data);
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}
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__device void svm_node_tex_coord_bump_dx(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
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{
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#ifdef __RAY_DIFFERENTIALS__
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float3 data;
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switch(type) {
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case NODE_TEXCO_OBJECT: {
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if(sd->object != ~0) {
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data = sd->P + sd->dP.dx;
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object_inverse_position_transform(kg, sd, &data);
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}
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else
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data = sd->P + sd->dP.dx;
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break;
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}
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case NODE_TEXCO_NORMAL: {
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if(sd->object != ~0) {
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data = sd->N;
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object_inverse_normal_transform(kg, sd, &data);
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}
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else
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data = sd->N;
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break;
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}
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case NODE_TEXCO_CAMERA: {
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Transform tfm = kernel_data.cam.worldtocamera;
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if(sd->object != ~0)
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data = transform_point(&tfm, sd->P + sd->dP.dx);
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else
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data = transform_point(&tfm, svm_background_position(kg, sd->P + sd->dP.dx));
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break;
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}
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case NODE_TEXCO_WINDOW: {
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data = svm_world_to_ndc(kg, sd, sd->P + sd->dP.dx);
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data.z = 0.0f;
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break;
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}
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case NODE_TEXCO_REFLECTION: {
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if(sd->object != ~0)
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data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
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else
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data = sd->I;
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break;
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}
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case NODE_TEXCO_DUPLI_GENERATED: {
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data = object_dupli_generated(kg, sd->object);
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break;
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}
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case NODE_TEXCO_DUPLI_UV: {
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data = object_dupli_uv(kg, sd->object);
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break;
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}
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}
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stack_store_float3(stack, out_offset, data);
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#else
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svm_node_tex_coord(kg, sd, stack, type, out_offset);
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#endif
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}
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__device void svm_node_tex_coord_bump_dy(KernelGlobals *kg, ShaderData *sd, float *stack, uint type, uint out_offset)
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{
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#ifdef __RAY_DIFFERENTIALS__
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float3 data;
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switch(type) {
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case NODE_TEXCO_OBJECT: {
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if(sd->object != ~0) {
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data = sd->P + sd->dP.dy;
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object_inverse_position_transform(kg, sd, &data);
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}
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else
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data = sd->P + sd->dP.dy;
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break;
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}
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case NODE_TEXCO_NORMAL: {
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if(sd->object != ~0) {
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data = sd->N;
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object_inverse_normal_transform(kg, sd, &data);
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}
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else
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data = sd->N;
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break;
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}
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case NODE_TEXCO_CAMERA: {
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Transform tfm = kernel_data.cam.worldtocamera;
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if(sd->object != ~0)
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data = transform_point(&tfm, sd->P + sd->dP.dy);
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else
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data = transform_point(&tfm, svm_background_position(kg, sd->P + sd->dP.dy));
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break;
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}
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case NODE_TEXCO_WINDOW: {
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data = svm_world_to_ndc(kg, sd, sd->P + sd->dP.dy);
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data.z = 0.0f;
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break;
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}
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case NODE_TEXCO_REFLECTION: {
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if(sd->object != ~0)
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data = 2.0f*dot(sd->N, sd->I)*sd->N - sd->I;
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else
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data = sd->I;
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break;
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}
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case NODE_TEXCO_DUPLI_GENERATED: {
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data = object_dupli_generated(kg, sd->object);
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break;
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}
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case NODE_TEXCO_DUPLI_UV: {
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data = object_dupli_uv(kg, sd->object);
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break;
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}
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}
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stack_store_float3(stack, out_offset, data);
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#else
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svm_node_tex_coord(kg, sd, stack, type, out_offset);
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#endif
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}
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__device void svm_node_normal_map(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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uint color_offset, strength_offset, normal_offset, space;
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decode_node_uchar4(node.y, &color_offset, &strength_offset, &normal_offset, &space);
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float3 color = stack_load_float3(stack, color_offset);
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color = 2.0f*make_float3(color.x - 0.5f, color.y - 0.5f, color.z - 0.5f);
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float3 N;
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if(space == NODE_NORMAL_MAP_TANGENT) {
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/* tangent space */
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if(sd->object == ~0) {
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stack_store_float3(stack, normal_offset, make_float3(0.0f, 0.0f, 0.0f));
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return;
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}
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/* first try to get tangent attribute */
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AttributeElement attr_elem, attr_sign_elem, attr_normal_elem;
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int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
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int attr_sign_offset = find_attribute(kg, sd, node.w, &attr_sign_elem);
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int attr_normal_offset = find_attribute(kg, sd, ATTR_STD_VERTEX_NORMAL, &attr_normal_elem);
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if(attr_offset == ATTR_STD_NOT_FOUND || attr_sign_offset == ATTR_STD_NOT_FOUND || attr_normal_offset == ATTR_STD_NOT_FOUND) {
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stack_store_float3(stack, normal_offset, make_float3(0.0f, 0.0f, 0.0f));
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return;
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}
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/* get _unnormalized_ interpolated normal and tangent */
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float3 tangent = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
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float sign = primitive_attribute_float(kg, sd, attr_sign_elem, attr_sign_offset, NULL, NULL);
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float3 normal;
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if(sd->shader & SHADER_SMOOTH_NORMAL)
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normal = primitive_attribute_float3(kg, sd, attr_normal_elem, attr_normal_offset, NULL, NULL);
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else
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normal = sd->N;
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/* apply normal map */
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float3 B = sign * cross(normal, tangent);
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N = normalize(color.x * tangent + color.y * B + color.z * normal);
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/* transform to world space */
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object_normal_transform(kg, sd, &N);
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}
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else {
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/* strange blender convention */
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color.y = -color.y;
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color.z = -color.z;
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/* object, world space */
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N = color;
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if(space == NODE_NORMAL_MAP_OBJECT)
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object_normal_transform(kg, sd, &N);
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else
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N = normalize(N);
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}
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float strength = stack_load_float(stack, strength_offset);
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if(strength != 1.0f) {
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strength = max(strength, 0.0f);
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N = normalize(sd->N + (N - sd->N)*strength);
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}
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stack_store_float3(stack, normal_offset, N);
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}
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__device void svm_node_tangent(KernelGlobals *kg, ShaderData *sd, float *stack, uint4 node)
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{
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uint tangent_offset, direction_type, axis;
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decode_node_uchar4(node.y, &tangent_offset, &direction_type, &axis, NULL);
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float3 tangent;
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if(direction_type == NODE_TANGENT_UVMAP) {
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/* UV map */
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AttributeElement attr_elem;
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int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
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if(attr_offset == ATTR_STD_NOT_FOUND)
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tangent = make_float3(0.0f, 0.0f, 0.0f);
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else
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tangent = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
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}
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else {
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/* radial */
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AttributeElement attr_elem;
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int attr_offset = find_attribute(kg, sd, node.z, &attr_elem);
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float3 generated;
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if(attr_offset == ATTR_STD_NOT_FOUND)
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generated = sd->P;
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else
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generated = primitive_attribute_float3(kg, sd, attr_elem, attr_offset, NULL, NULL);
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if(axis == NODE_TANGENT_AXIS_X)
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tangent = make_float3(0.0f, -(generated.z - 0.5f), (generated.y - 0.5f));
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else if(axis == NODE_TANGENT_AXIS_Y)
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tangent = make_float3(-(generated.z - 0.5f), 0.0f, (generated.x - 0.5f));
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else
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tangent = make_float3(-(generated.y - 0.5f), (generated.x - 0.5f), 0.0f);
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}
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object_normal_transform(kg, sd, &tangent);
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tangent = cross(sd->N, normalize(cross(tangent, sd->N)));
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stack_store_float3(stack, tangent_offset, tangent);
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}
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CCL_NAMESPACE_END
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