static void node_shader_exec_layer_weight(void *data, int UNUSED(thread), bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), bNodeStack **in, bNodeStack **out)
{
ShadeInput *shi = ((ShaderCallData *)data)->shi;
float blend = in[0]->vec[0];
float eta = max_ff(1 - blend, 0.00001);
float n[3];
if (in[1]->hasinput) {
copy_v3_v3(n, in[1]->vec);
}
else {
copy_v3_v3(n, shi->vn);
}
if (shi->use_world_space_shading)
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEW_MATRIX), n);
out[0]->vec[0] = RE_fresnel_dielectric(shi->view, n, shi->flippednor ? eta : 1/eta);
float facing = fabs(dot_v3v3(shi->view, n));
if (blend != 0.5) {
CLAMP(blend, 0.0, 0.99999);
blend = (blend < 0.5) ? 2.0 * blend : 0.5 / (1.0 - blend);
facing = pow(facing, blend);
}
out[1]->vec[0] = 1.0 - facing;
}
static void node_shader_exec_fresnel(void *data, int UNUSED(thread), bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), bNodeStack **in, bNodeStack **out)
{
ShadeInput *shi = ((ShaderCallData *)data)->shi;
float eta = max_ff(in[0]->vec[0], 0.00001);
float n[3];
if (in[1]->hasinput) {
copy_v3_v3(n, in[1]->vec);
}
else {
copy_v3_v3(n, shi->vn);
}
if(shi->use_world_space_shading)
mul_mat3_m4_v3((float (*)[4])RE_render_current_get_matrix(RE_VIEW_MATRIX), n);
out[0]->vec[0] = RE_fresnel_dielectric(shi->view, n, shi->flippednor ? 1/eta : eta);
}
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_SPACE_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_SPACE_OBJECT:
case SHD_SPACE_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_SPACE_WORLD:
case SHD_SPACE_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);
}
}