vba textures?

Graphics and GPU Programming Programming

Started by Shadowwoelf August 18, 2008 09:47 PM

4 comments, last by V-man 15 years, 8 months ago

Shadowwoelf

136

Author

August 18, 2008 09:47 PM

I am reading up vba and I was wondering how do you add textures to each quad?

giant

205

August 19, 2008 07:01 AM

Do you mean VBO? (Vertex Buffer Objects)

The Decade Engine

Shadowwoelf

136

Author

August 19, 2008 03:10 PM

I looked up vbo's but I cant seem to find any examples where they use textures with the quads. So if I want to use texture will I have to use immediate mode?

songho

268

August 19, 2008 03:57 PM

I think your question is how to draw a polygon with texture, but other than in immediate mode. If so, please look for Vertex Array (VA) and VBO.

You can store st (uv) texture coordinates into a VBO or Vertex Array (VA) along with other vertex information, such as position, colour, normals, etc. But, actual texels are still in OpenGL texture object.

Shadowwoelf

136

Author

August 19, 2008 04:56 PM

But I am confused on how to use a vertex array or vbo with textures.

So would I just call glbindtexture before I call something like glDrawArrays(GL_TRIANGLES, 0, VertexCount);?

V-man

813

August 19, 2008 11:19 PM

Quote:Original post by Shadowwoelf
But I am confused on how to use a vertex array or vbo with textures.

So would I just call glbindtexture before I call something like glDrawArrays(GL_TRIANGLES, 0, VertexCount);?

In order to bind a texture, you call glBindTexture. I think that's obvious and also there are plenty of examples on the net.

Sig: http://glhlib.sourceforge.net
an open source GLU replacement library. Much more modern than GLU.
float matrix[16], inverse_matrix[16];
glhLoadIdentityf2(matrix);
glhTranslatef2(matrix, 0.0, 0.0, 5.0);
glhRotateAboutXf2(matrix, angleInRadians);
glhScalef2(matrix, 1.0, 1.0, -1.0);
glhQuickInvertMatrixf2(matrix, inverse_matrix);
glUniformMatrix4fv(uniformLocation1, 1, FALSE, matrix);
glUniformMatrix4fv(uniformLocation2, 1, FALSE, inverse_matrix);

vba textures?

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