Learning VBO

Graphics and GPU Programming Programming

Started by CirdanValen December 25, 2009 09:58 PM

2 comments, last by CirdanValen 14 years, 3 months ago

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December 25, 2009 09:58 PM

So I decided to try and get VBO working. I already got vertex arrays working, so I figured going an extra step to get VBOs working wouldn't be a bad idea, however it is not easy as I first thought. Right now, I'm just trying to render a simple white quad via VBO, then I'll move forward from there. My vertex array render code is working perfectly fine, but this VBO method isn't displaying anything. I've been reading guides and sample code all day...but I guess I don't understand it or something.


GLfloat vertices[] = {32.0, 10.0,
	10.0, 10.0,
	10.0, 32.0,
	32.0, 32.0};

// The Setup

	glGenBuffersARB(1, &_vbo);
	glBindBufferARB(GL_ARRAY_BUFFER_ARB, _vbo);
	glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
	glBindBufferARB(GL_ARRAY_BUFFER_ARB,0);

// The render method

	glColor4f(1.0, 1.0, 1.0, 1.0);
	
	glBindBufferARB(GL_ARRAY_BUFFER_ARB, _vbo);

	glVertexPointer(2, GL_FLOAT, 0, 0);
	
	glEnableClientState(GL_VERTEX_ARRAY);
	
	glDrawArrays(GL_QUADS, 0, 4);
	
	glDisableClientState(GL_VERTEX_ARRAY);
	
	glBindBufferARB(GL_ARRAY_BUFFER,0);