organicmaps/fast_obj
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Mark materials that weren't loaded from mtllib as fallback

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This can happen when mtllib is absent, points to a non-existing file, or
material names are incorrect. In either case it helps the reader
differentiate between materials that are actually specified in the file,
even if their definition happens to match the default, from materials
that were never loaded in the first place.
This commit is contained in:
Arseny Kapoulkine 2023-12-15 11:29:56 -08:00
parent 36cb5a8d89
commit b827219dbf
1 changed files with 7 additions and 1 deletions
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8
fast_obj.h
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@ -65,6 +65,9 @@ typedef struct
float d; /* Disolve (alpha) */
int illum; /* Illumination model */
/* Set for materials that don't come from the associated mtllib */
int fallback;
/* Texture maps */
fastObjTexture map_Ka;
fastObjTexture map_Kd;
@ -323,7 +326,7 @@ unsigned long file_size(void* file, void* user_data)
long p;
long n;
(void)(user_data);
f = (FILE*)(file);
p = ftell(f);
@ -872,6 +875,8 @@ fastObjMaterial mtl_default(void)
mtl.d = 1.0;
mtl.illum = 1;
mtl.fallback = 0;
mtl.map_Ka = map_default();
mtl.map_Kd = map_default();
mtl.map_Ks = map_default();
@ -919,6 +924,7 @@ const char* parse_usemtl(fastObjData* data, const char* ptr)
{
fastObjMaterial new_mtl = mtl_default();
new_mtl.name = string_copy(s, e);
new_mtl.fallback = 1;
array_push(data->mesh->materials, new_mtl);
}