OpenGL fails at intesection of textures - c++

Question

I've loaded a texture, and displayed it on a cube and on a plane. At the point where the plane and the cube intersect, there are some ugly visual artifacts.
Here are two pictures demonstrating the issue:
Image 1 - what is this:
Image 2 - same scenario, other perspective:
Here is how I loaded the image:
static const GLenum gl_format[4] = { GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_BGR, GL_BGRA };
GLuint LoadTGATexture(const char* filename)
{
//image is already loaded in --- unsigned char[] data - int width - int height - int components
unsigned int handle;
glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &max_anisotropy);
glGenTextures(1, &handle);
glBindTexture(GL_TEXTURE_2D, handle);
glTexImage2D(GL_TEXTURE_2D, 0, components, width, height, 0, gl_format[components - 1], GL_UNSIGNED_BYTE, data);
gluBuild2DMipmaps(GL_TEXTURE_2D, components, width, height, gl_format[components - 1], GL_UNSIGNED_BYTE, data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, max_anisotropy);
glBindTexture(GL_TEXTURE_2D, 0);
delete [] data;
return handle;
}
But how can I fix it, and what is my mistake?

Answer 1

I would guess that it has nothing to do with your texture.
By the looks of it you have a problem with clipping. I would verify glEnable(GL_DEPTHTEST), make sure that your near-plane when setting the perspective matrix is >0.0, meaning not 0.0 and not a negative number. Also make sure that your far-plane isn't some insanely huge number. I normally stop at 1000.0 with good results. You might want to do something smaller.