3d models and textures question/bug? about silenceengine HOT 12 CLOSED

hm no it was me however it seems that not setting some or all of these values

Ns 96.078431
Ka 0.000000 0.000000 0.000000
Kd 0.640000 0.640000 0.640000
Ks 0.500000 0.500000 0.500000
Ni 1.000000
d 1.000000
illum 2

in the mtl file breaks textures appearing. They should probably default to a value that allows a texture to apear when not set in the mtl file though again that could also be me.

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There is no map_kd in the material file?

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there is I left it out because it was already in the file the whole thing is

newmtl dirt
Ns 96.078431
Ka 0.000000 0.000000 0.000000
Kd 0.640000 0.640000 0.640000
Ks 0.500000 0.500000 0.500000
Ni 1.000000
d 1.000000
illum 2
map_Kd dirt.jpg

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The ambient component Ka of the material is set to zero which means the object will not be visible when there is no light. This is the behaviour you get when rendering it in Blender, or whatever modelling tool you use.

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The object would have shown up black then when it was showing up white as if there was to much light like the default is 1 1 1 not 0 0 0. Also there was light in the scene as I am using a modified version of obj test.

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This is sounding like a bug, I'll work on this issue. And I'm browsing your code on the repository you pushed 13 hours ago, you are setting the light to white? So the shader is adding the light color I think, making everything look white. This is a shader issue probably. Will look at that as soon as possible.

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ok im updateing the code now so that it produces the white terrain on Yirath (none of the extra material parts set other than texture)

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And does the model has texture coordinates exported? Otherwise the model assumes the texture coordinate as zeroes, so the texture might be rendered gray or white.

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no texture coordinates are correct (the exporter i use will only export a mtl file when it has a texture so it will also generate the proper coords) just adding this

Ns 96.078431
Ka 0.000000 0.000000 0.000000
Kd 0.640000 0.640000 0.640000
Ks 0.500000 0.500000 0.500000
Ni 1.000000
d 1.000000
illum 2

between newmtl dirt and map_Kd dirt.jpg will fix it to display properly as well

EDIT:
in the terrain0.mtl file of course

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Did it fix this issue? I'll have to re-implement the model class anyway to support animated models, so if this isn't fixed, I will look at this too. The shaders are looking correct to me. If you confirm that this is working, I will close this issue.

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setting it directly does fix the problem however in the Material class your default for ambient is ambient = new Color(1, 1, 1, 1); when it should more likely be black or something like ambient = new Color(0.1f, 0.1f, 0.1f, 1);

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I set the default ambient to white, because the Material is also applied to the 2D rendering, made through Batcher. The model changes the material, does the rendering, and switches back to the default material so that the GUI and other 2D graphics will render at full intensity. And, many models will set those values in their models, so there is no need to change that.

I'm now closing this issue, but you can still reply to it if you want to say something on this topic.

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