Sphere Texture Mapping shows visible seams

Posted by AvengerDr on Game Development See other posts from Game Development or by AvengerDr
Published on 2014-05-31T13:49:58Z Indexed on 2014/05/31 16:05 UTC
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Filed under:

textures

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hlsl

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uv-mapping

As you can see from the above picture there is a visible seam in the texture mapping. The underlying mesh is a geosphere based on octahedron subdivisions. On that particular latitude, vertices have been duplicated. However there still is a visible seam.

Here is how I calculate the UV coordinates:

float longitude = (float)Math.Atan2(normal.X, -normal.Z);
float latitude = (float)Math.Acos(normal.Y);

float u = (float)(longitude / (Math.PI * 2.0) + 0.5);
float v = (float)(latitude / Math.PI);

Is this a problem in the coordinates or a mipmapping issue?

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