Original Post
Hi everybody!!! First of all, sorry for my bad english. I´m begginer in OpenGl. I use Tao Framework to have a control where draw. In my application i draw signal_1, clear control with Gl.glClear(Gl.GL_COLOR_BUFFER_BIT | Gl.GL_DEPTH_BUFFER_BIT), and the paint signal_2. But when i move over the form of the control another window, signal_2 disappear and signal_1 appear.if i move the window over the opengl control slowly signal_2 and signal_1 alternate. i forget clear other buffer? My opengl initialization: Gl.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); Gl.glShadeModel(Gl.GL_FLAT); Gl.glEnable(Gl.GL_DEPTH_TEST); Gl.glEnable(Gl.GL_CULL_FACE); I suppose use single buffer, it´s right?