Can this library render textured models?

[Goldname100]

I have a .obj, .mtl, and png texture file. Is it possible to render a complete textured version of the model using this library? I wasn't too sure as I don't see any examples taking mtl files as input.

[pmh47]

Yes, it is possible, but you'll need to write some code! The texturing sample already shows how to do simple textured rendering, but I don't have an example for the rest. You'll need to write code to load the obj and mtl files, 'rearrange' and tile the material parameters into a tensor shaped like the vertex colours, then follow the pattern of the texturing sample -- do deferred rendering passes that write out the relevant material parameters and UVs to gbuffers, then do the final lighting & texturing calculations using those buffers.

On Sat, 20 Jul 2019 at 08:35, Goldname100 notifications@github.com wrote:

I have a .obj, .mtl, and png texture file. Is it possible to render a complete textured version of the model using this library? I wasn't too sure as I don't see any examples taking mtl files as input.

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[Goldname100]

Can you explain what you mean by simple textured rendering? How is that different from normal textured rendering?

[pmh47]

I meant by 'simple' that there's a single material (diffuse only), single texture, and the mesh is given directly in the code. However, there is nothing fundamentally different about rendering an obj+mtl.

[Frank-Dz]

Can you explain what you mean by simple textured rendering? How is that different from normal textured rendering?

I think sample/deferred.py provides a good demo. And I successfully made my model with texture based on this code. You can have a try.

[Frank-Dz]

@pmh47 Hi~ sorry for bothering. I want to know how to render an obj with a transparent background or specific image? I rendered some results, and all my results are like:

I know I should adjust the background_attributes, but I do not know how to set it.

pixels = dirt.rasterise_deferred(
        vertices=cube_vertices_clip,
        vertex_attributes=tf.concat([
            tf.ones_like(cube_vertices_object[:, :1]),  # mask
            cube_uvs,  # texture coordinates
            cube_normals_world  # normals
        ], axis=1),
        faces=cube_faces,
        background_attributes=(tf.ones([frame_height, frame_width, 6])*255),
        shader_fn=shader_fn,
        shader_additional_inputs=[texture, light_direction]
    )

Thanks for any help and guidance!