OpenGL Texture Mapping problem

[jebadiah]

Hello.

I am currently using a sample code from OReilly's iPhone 3d projects. Specifically, this one: Index of /9780596804831/CameraTexture

I try to change the texture image into a picture of earth but it is displayed 3x like so:



I am currently using:

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);

What I need is to wrap the image around the sphere so it looks like an actual globe.

Do you have any idea how I might be able to this?

Thank you.

[anorak]

My only guess is that the texture coordinates that are generated are not exactly what you want.Take a look at how the sphere and texture coordinates are constructed.

[jebadiah]

Originally Posted by anorak

My only guess is that the texture coordinates that are generated are not exactly what you want.Take a look at how the sphere and texture coordinates are constructed.

Thank you very much. I found that in the ParametricEquations.hpp, the texture is set to repeat 3x. I simply changed the values to (1,1) and the texture was fixed.

Hope this helps others too!

[jebadiah]

By the way, I was also experimenting with the procedural sphere with texture using this sphere tutorial along with this texture tutorial. I attached an image to show the problem though it is almost the same as my problem above.


I am thinking that the problem might lie in this code:

glTexCoordPointer(3, GL_FLOAT, 0, sphereTriangleStripVertices);

but I have had no success in fixing it.

Please help as I am trying to study which sphere rendering would be best for my app.

Thank you in advance!