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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* 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.
*
* The Original Code is Copyright (C) 2005 Blender Foundation.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
#include "../node_shader_util.h"
/* **************** OUTPUT ******************** */
static bNodeSocketTemplate sh_node_normal_map_in[] = {
{ SOCK_FLOAT, 1, N_("Strength"), 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 10.0f},
{ SOCK_RGBA, 1, N_("Color"), 0.5f, 0.5f, 1.0f, 1.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static bNodeSocketTemplate sh_node_normal_map_out[] = {
{ SOCK_VECTOR, 0, N_("Normal"), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
{ -1, 0, "" }
};
static void node_shader_init_normal_map(bNodeTree *UNUSED(ntree), bNode *node)
{
NodeShaderNormalMap *attr = MEM_callocN(sizeof(NodeShaderNormalMap), "NodeShaderNormalMap");
node->storage = attr;
}
static void node_shader_exec_normal_map(void *data, int UNUSED(thread), bNode *node, bNodeExecData *UNUSED(execdata), bNodeStack **in, bNodeStack **out)
{
if (data) {
ShadeInput *shi = ((ShaderCallData *)data)->shi;
NodeShaderNormalMap *nm = node->storage;
float strength, vecIn[3];
nodestack_get_vec(&strength, SOCK_FLOAT, in[0]);
nodestack_get_vec(vecIn, SOCK_VECTOR, in[1]);
vecIn[0] = -2 * (vecIn[0] - 0.5f);
vecIn[1] = 2 * (vecIn[1] - 0.5f);
vecIn[2] = 2 * (vecIn[2] - 0.5f);
CLAMP_MIN(strength, 0.0f);
float *N = shi->nmapnorm;
int uv_index = 0;
switch (nm->space) {
case SHD_NORMAL_MAP_TANGENT:
if (nm->uv_map[0]) {
/* find uv map by name */
for (int i = 0; i < shi->totuv; i++) {
if (STREQ(shi->uv[i].name, nm->uv_map)) {
uv_index = i;
break;
}
}
}
else {
uv_index = shi->actuv;
}
float *T = shi->tangents[uv_index];
float B[3];
cross_v3_v3v3(B, N, T);
mul_v3_fl(B, T[3]);
for (int j = 0; j < 3; j++)
out[0]->vec[j] = vecIn[0] * T[j] + vecIn[1] * B[j] + vecIn[2] * N[j];
interp_v3_v3v3(out[0]->vec, N, out[0]->vec, strength);
if (shi->use_world_space_shading) {
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEWINV_MATRIX), out[0]->vec);
}
break;
case SHD_NORMAL_MAP_OBJECT:
case SHD_NORMAL_MAP_BLENDER_OBJECT:
if (shi->use_world_space_shading) {
mul_mat3_m4_v3((float (*)[4])RE_object_instance_get_matrix(shi->obi, RE_OBJECT_INSTANCE_MATRIX_OB), vecIn);
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEWINV_MATRIX), N);
}
else
mul_mat3_m4_v3((float (*)[4])RE_object_instance_get_matrix(shi->obi, RE_OBJECT_INSTANCE_MATRIX_LOCALTOVIEW), vecIn);
interp_v3_v3v3(out[0]->vec, N, vecIn, strength);
break;
case SHD_NORMAL_MAP_WORLD:
case SHD_NORMAL_MAP_BLENDER_WORLD:
if (shi->use_world_space_shading)
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEWINV_MATRIX), N);
else
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEW_MATRIX), vecIn);
interp_v3_v3v3(out[0]->vec, N, vecIn, strength);
break;
}
if (shi->use_world_space_shading) {
negate_v3(out[0]->vec);
}
normalize_v3(out[0]->vec);
}
}
static int gpu_shader_normal_map(GPUMaterial *mat, bNode *node, bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
{
NodeShaderNormalMap *nm = node->storage;
GPUNodeLink *negnorm;
GPUNodeLink *realnorm;
GPUNodeLink *strength;
float d[4] = {0, 0, 0, 0};
if (in[0].link)
strength = in[0].link;
else
strength = GPU_uniform(in[0].vec);
if (in[1].link)
realnorm = in[1].link;
else
realnorm = GPU_uniform(in[1].vec);
negnorm = GPU_builtin(GPU_VIEW_NORMAL);
GPU_link(mat, "math_max", strength, GPU_uniform(d), &strength);
if (GPU_material_use_world_space_shading(mat)) {
/* ******* CYCLES or BLENDER INTERNAL with world space shading flag ******* */
const char *color_to_normal_fnc_name = "color_to_normal_new_shading";
if (nm->space == SHD_NORMAL_MAP_BLENDER_OBJECT || nm->space == SHD_NORMAL_MAP_BLENDER_WORLD || !GPU_material_use_new_shading_nodes(mat))
color_to_normal_fnc_name = "color_to_blender_normal_new_shading";
switch (nm->space) {
case SHD_NORMAL_MAP_TANGENT:
GPU_link(mat, "color_to_normal_new_shading", realnorm, &realnorm);
GPU_link(mat, "node_normal_map", GPU_attribute(CD_TANGENT, nm->uv_map), negnorm, realnorm, &realnorm);
GPU_link(mat, "vec_math_mix", strength, realnorm, GPU_builtin(GPU_VIEW_NORMAL), &out[0].link);
/* for uniform scale this is sufficient to match Cycles */
GPU_link(mat, "direction_transform_m4v3", out[0].link, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &out[0].link);
GPU_link(mat, "vect_normalize", out[0].link, &out[0].link);
return true;
case SHD_NORMAL_MAP_OBJECT:
case SHD_NORMAL_MAP_BLENDER_OBJECT:
GPU_link(mat, "direction_transform_m4v3", negnorm, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &negnorm);
GPU_link(mat, color_to_normal_fnc_name, realnorm, &realnorm);
GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_OBJECT_MATRIX), &realnorm);
break;
case SHD_NORMAL_MAP_WORLD:
case SHD_NORMAL_MAP_BLENDER_WORLD:
GPU_link(mat, "direction_transform_m4v3", negnorm, GPU_builtin(GPU_INVERSE_VIEW_MATRIX), &negnorm);
GPU_link(mat, color_to_normal_fnc_name, realnorm, &realnorm);
break;
}
}
else {
/* ************** BLENDER INTERNAL without world space shading flag ******* */
GPU_link(mat, "color_to_normal", realnorm, &realnorm);
GPU_link(mat, "mtex_negate_texnormal", realnorm, &realnorm);
GPU_link(mat, "vec_math_negate", negnorm, &negnorm);
switch (nm->space) {
case SHD_NORMAL_MAP_TANGENT:
GPU_link(mat, "node_normal_map", GPU_attribute(CD_TANGENT, nm->uv_map), negnorm, realnorm, &realnorm);
break;
case SHD_NORMAL_MAP_OBJECT:
case SHD_NORMAL_MAP_BLENDER_OBJECT:
GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_LOC_TO_VIEW_MATRIX), &realnorm);
break;
case SHD_NORMAL_MAP_WORLD:
case SHD_NORMAL_MAP_BLENDER_WORLD:
GPU_link(mat, "direction_transform_m4v3", realnorm, GPU_builtin(GPU_VIEW_MATRIX), &realnorm);
break;
}
}
GPU_link(mat, "vec_math_mix", strength, realnorm, negnorm, &out[0].link);
GPU_link(mat, "vect_normalize", out[0].link, &out[0].link);
return true;
}
/* node type definition */
void register_node_type_sh_normal_map(void)
{
static bNodeType ntype;
sh_node_type_base(&ntype, SH_NODE_NORMAL_MAP, "Normal Map", NODE_CLASS_OP_VECTOR, 0);
node_type_compatibility(&ntype, NODE_NEW_SHADING | NODE_OLD_SHADING);
node_type_socket_templates(&ntype, sh_node_normal_map_in, sh_node_normal_map_out);
node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
node_type_init(&ntype, node_shader_init_normal_map);
node_type_storage(&ntype, "NodeShaderNormalMap", node_free_standard_storage, node_copy_standard_storage);
node_type_gpu(&ntype, gpu_shader_normal_map);
node_type_exec(&ntype, NULL, NULL, node_shader_exec_normal_map);
nodeRegisterType(&ntype);
}
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