private void CreateVBOs()
{
this.positionVboHandle = GL.CreateBuffer();
this.elementsHandle = GL.CreateBuffer();
GL.BindBuffer(GL.GL_ARRAY_BUFFER, this.positionVboHandle);
GL.BindBuffer(GL.GL_ELEMENT_ARRAY_BUFFER, this.elementsHandle);
this.vaoHandle = GL.CreateVertexArray();
GL.BindVertexArray(this.vaoHandle);
GL.BindBuffer(GL.GL_ARRAY_BUFFER, this.positionVboHandle);
GL.EnableVertexAttribArray(this.attributePositon);
GL.EnableVertexAttribArray(this.attributeUV);
GL.EnableVertexAttribArray(this.attributeColor);
GL.VertexAttribPointer(this.attributePositon, 2, GL.GL_FLOAT, false, Marshal.SizeOf <DrawVertex>(), Marshal.OffsetOf <DrawVertex>("pos").ToInt32());
GL.VertexAttribPointer(this.attributeUV, 2, GL.GL_FLOAT, false, Marshal.SizeOf <DrawVertex>(), Marshal.OffsetOf <DrawVertex>("uv").ToInt32());
GL.VertexAttribPointer(this.attributeColor, 4, GL.GL_FLOAT, true, Marshal.SizeOf <DrawVertex>(), Marshal.OffsetOf <DrawVertex>("color").ToInt32());
Utility.CheckWebGLError();
}
