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Fix T103615: OSL image box mapping has flipped textures 

This breaks backwards compatibility some in that 3 sides will be mapped
differently now, but difficult to avoid and can be considered a bugfix.

Similar to rBdd8016f7081f.

Maniphest Tasks: T103615

Differential Revision: https://developer.blender.org/D16910
This commit is contained in:
Philipp Oeser 2023-01-04 10:33:40 +01:00
parent 6aacbdd716
commit 6191b726aa
Notes: blender-bot 2023-02-14 03:00:45 +01:00 
Referenced by issue #100749, Blender LTS: Maintenance Task 3.3
Referenced by issue #103615, Different texture direction for box projection mode in OSL
1 changed files with 10 additions and 6 deletions
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16
intern/cycles/kernel/osl/shaders/node_image_texture.osl
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@ -122,6 +122,7 @@ shader node_image_texture(int use_mapping = 0,
vector Nob = transform("world", "object", N);
/* project from direction vector to barycentric coordinates in triangles */
vector signed_Nob = Nob;
Nob = vector(fabs(Nob[0]), fabs(Nob[1]), fabs(Nob[2]));
Nob /= (Nob[0] + Nob[1] + Nob[2]);
@ -184,9 +185,10 @@ shader node_image_texture(int use_mapping = 0,
float tmp_alpha;
if (weight[0] > 0.0) {
point UV = point((signed_Nob[0] < 0.0) ? 1.0 - p[1] : p[1], p[2], 0.0);
Color += weight[0] * image_texture_lookup(filename,
p[1],
p[2],
UV[0],
UV[1],
tmp_alpha,
compress_as_srgb,
ignore_alpha,
@ -198,9 +200,10 @@ shader node_image_texture(int use_mapping = 0,
Alpha += weight[0] * tmp_alpha;
}
if (weight[1] > 0.0) {
point UV = point((signed_Nob[1] > 0.0) ? 1.0 - p[0] : p[0], p[2], 0.0);
Color += weight[1] * image_texture_lookup(filename,
p[0],
p[2],
UV[0],
UV[1],
tmp_alpha,
compress_as_srgb,
ignore_alpha,
@ -212,9 +215,10 @@ shader node_image_texture(int use_mapping = 0,
Alpha += weight[1] * tmp_alpha;
}
if (weight[2] > 0.0) {
point UV = point((signed_Nob[2] > 0.0) ? 1.0 - p[1] : p[1], p[0], 0.0);
Color += weight[2] * image_texture_lookup(filename,
p[1],
p[0],
UV[0],
UV[1],
tmp_alpha,
compress_as_srgb,
ignore_alpha,