public VertexArrayObject(BufferObject <TVerexType> vbo, BufferObject <TIndexType> ibo)
{
_id = GL.GenVertexArray();
Bind();
vbo.Bind();
ibo.Bind();
}
public void End()
{
// dont allow for end to be called twice
if (!_beginCalled)
{
throw new Exception("Cannot call end before calling begin");
}
_beginCalled = false;
// on end we have to bind all the data to the vbo
_quadVbo.Bind();
int size = _quadCount * 4 * VertexSize * sizeof(float);
GL.BufferSubData <float>(BufferTarget.ArrayBuffer, IntPtr.Zero, size, _vertices);
// also bind every texture
for (int i = 0; i < _textures.Count; i++)
{
_textures[i].Bind(TextureUnit.Texture0 + i + 1);
}
// and finally draw everything
_quadVao.Bind();
_quadShader.Bind();
GL.DrawElements(BeginMode.Triangles, _quadCount * 6, DrawElementsType.UnsignedInt, 0);
// also reset the quadCount
_quadCount = 0;
}
