Please help me understand CVAs

OpenGL OpenGL: User Software
1

I can use CVAs to a point, but not to their fullest.

I have a function that removes any shared vertices from my vertex array, the problem is that if I do that, my normal, color, and texture array elements aren’t aligned any more. How can I fix that? For now I have nPolygons*3 worth of all arrays. It’s really slow .

Here’s my drawing routine:

void rmdata: [img]http://www.opengl.org/discussion_boards/ubb/biggrin.gif[/img]raw(rmdescriptor* Descriptor, GLuint* TextureNames, bool UseSN)
{
	if(!Descriptor)
	{
		return;
	}

	GLuint ColorOld=512, ColorNew=0;

	glEnableClientState(GL_VERTEX_ARRAY);
	glVertexPointer(3, GL_FLOAT, 0, Vertices);

	if(Descriptor->States & RM_NORMAL_ARRAY)
	{
		glEnableClientState(GL_NORMAL_ARRAY);
		glNormalPointer(GL_FLOAT, 0, Normals);
	}
	else
	{
		glDisableClientState(GL_NORMAL_ARRAY);
	}

	if(Descriptor->States & RM_TEXTURE_COORD_ARRAY)
	{
		glEnableClientState(GL_TEXTURE_COORD_ARRAY);
		glTexCoordPointer(2, GL_FLOAT, 0, Descriptor->UVcoords);
	}
	else
	{
		glDisableClientState(GL_TEXTURE_COORD_ARRAY);
	}
	
	if(Descriptor->States & RM_COLOR_ARRAY)
	{
		glEnableClientState(GL_COLOR_ARRAY);
		glColorPointer(3, GL_FLOAT, 0, Descriptor->Colors);
	}	
	else
	{
		glDisableClientState(GL_COLOR_ARRAY);
	}

	if(glLockArraysEXT)
		glLockArraysEXT(0, nVertices);

	rmPolygonCount+=Descriptor->nPolygons;

	for(GLuint i=0; i<Descriptor->nPolygons; i++)
	{
		if(Descriptor->States & RM_TEXTURE_COORD_ARRAY && Descriptor->TextureNames[i] != 255)
		{
			ColorNew=TextureNames[Descriptor->TextureNames[i]];
		}
		else
		{
			ColorNew=0;
		}

		if(ColorOld!=ColorNew && UseSN)
		{
			glBindTexture(GL_TEXTURE_2D, ColorNew);
			ColorOld=ColorNew;
		}

		glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_INT, Descriptor->VertexIndices[i]);
		//glDrawArrays(GL_TRIANGLES, 0, 1);
	}
	//glDrawArrays(GL_TRIANGLES, 0, Descriptor->nPolygons*3);

	if(glUnlockArraysEXT)
		glUnlockArraysEXT();

}

Please help me. I’ve asked about this questions here and there a million times, but no one has the answers. I’ve read documents, tutorials, I even have the Red Book…still I don’t get it . Also, can you explain in english what glLockArraysEXT(); and glUnlockArraysEXT(); does? If I could make sence of some of this I could get started making a better model library.