public void Render(BxlytShader shader, Vector2[] positions, Vector4[] colors, Vector2[] texCoords0)
{
shader.Enable();
bool buffersWereInitialized = vbo_position != 0 && ibo_position != 0;
if (!buffersWereInitialized)
{
GenerateBuffers(positions, colors, texCoords0);
}
shader.EnableVertexAttributes();
GL.BindBuffer(BufferTarget.ArrayBuffer, vbo_position);
GL.VertexAttribPointer(shader.GetAttribute("vPosition"), 2, VertexAttribPointerType.Float, false, Vertex.SizeInBytes, 0);
GL.VertexAttribPointer(shader.GetAttribute("vColor"), 4, VertexAttribPointerType.Float, false, Vertex.SizeInBytes, 8);
GL.VertexAttribPointer(shader.GetAttribute("vTexCoord0"), 2, VertexAttribPointerType.Float, false, Vertex.SizeInBytes, 24);
GL.VertexAttribPointer(shader.GetAttribute("vTexCoord1"), 2, VertexAttribPointerType.Float, false, Vertex.SizeInBytes, 32);
GL.VertexAttribPointer(shader.GetAttribute("vTexCoord2"), 2, VertexAttribPointerType.Float, false, Vertex.SizeInBytes, 40);
GL.BindBuffer(BufferTarget.ElementArrayBuffer, ibo_position);
GL.DrawElements(PrimitiveType.Quads, 4, DrawElementsType.UnsignedShort, IntPtr.Zero);
shader.DisableVertexAttributes();
}