int size = 3*3*2;
float* test = new float[size];
for(int i=0; i<size; i++)
test = 1.0f;
glGenTextures(1, &g_texture3DID);
glBindTexture(GL_TEXTURE_3D, g_texture3DID);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, 3, 3, 2, 0, GL_RGBA, GL_FLOAT, &test[0]);
texture 3d basics
Author
hihi!
jus wondering if anyone can enlighten me on this matter:
i am trying to feed in some data into a texture 3d and test its usage using a pixelshader.
i tried using a single float value and it works fine.
but if values are in a vector or explict array, the results dun show.
//this is the code which cannot work
anyone?
thx!
RC
1)The dimensions of the texture are not powers of 2.
2)The GL_FLOAT enum you use, means that each component of a texel is a float. Since you're using RGBA textures, each texel has 4 components. So, you need 4 floats to store a texel.
2)The GL_FLOAT enum you use, means that each component of a texel is a float. Since you're using RGBA textures, each texel has 4 components. So, you need 4 floats to store a texel.
Quote:Original post by RenderCache
ok thx!
power of 2 is the answer
What I said in (2) is also important. If you don't fix it, you'll have also problems, and it might cause the program to crash.
This topic is closed to new replies.
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