Presumably broken hashmap for material listing about tinyobjloader-c HOT 6 CLOSED

Hashmap implementation that handles the material IDs is broken, as it firstly work well with like 1500 triangles,

Could you post reproducible .obj(and .mtl) file?

from tinyobjloader-c.

Hi,
For sure, you'll find both of them in this archive:
https://mega.nz/file/HQslFYrb#SnVobW74RlGAlqWzHeyw4sM6KGGi57KZPkxgiUWcqds
The models are exported from Blender, and it happens with the model without materials too. Thanks so much for looking in that :)

from tinyobjloader-c.

I have tested with your .obj, but material_ids works well.

printf("Texture mat ID = %d\n", attrib.material_ids[face_offset + 1])

You should not use face_offset to access material_ids since material id is provided per-face manner. With address sanitizer, you'll get an out-of-bounds access error.

I have added an comment how to access material_ids

from tinyobjloader-c.

I have checked that solution, but I get weird results.
I splitted the vertex buffer on multiple ones for each shape, and each shape have its own material. However inside 1 shape, I could get multiple Material IDs, which shouldn't be possible.

from tinyobjloader-c.

I could get multiple Material IDs

.obj can have multiple material ids(per-face material). If you use tinyobjloader-c for OpenGL/DirectX application, you first need to re-arrange vertex data by iterating material ids.

from tinyobjloader-c.

Got it, thanks. For now so using a workaround to instead to get per-face material IDs, use per-object materials by merging them before-hand.
Thanks again.

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