OpenGL Skybox问题

Question

There are seems on the edges of the cube that I have constructed and I cant understand why. I have set the following parameters...

glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);   
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

The lines only appear sometimes, it depends on what angle the camera is sitting at. Any ideas why the lines are still there?

Answer 1

It would help if you could show us a screen shot. But the problem is probably the fact that you're not interpolating the textels along the edge of each face with their neighbors on the other faces.

So you should add a border to each texture by copying the edges of the neighboring textures, and change the filter mode to GL_CLAMP . Or you can use a cubemap texture instead.

Answer 2

maybe you need to add:

glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

in the code you provided there is only S and T coord setup, you need the R as well.

Answer 3

Turns out this was actually a problem with SOIL which is the texture loading program that I was using. After I changed the texture loading method the lines dissapeared