Thiago, I would not expect to see those drawn. Your color/depth clear should take care of it. You're using a GLSurfaceView and drawing only in the renderer which is called by the view, right?
I suppose I'd try a flush before the actual rendering pass but that shouldn't be necessary either. What is your thread configuration? Doing anything special there? On Sep 3, 11:33 am, Lance Nanek <[email protected]> wrote: > Weird, even if the command queue filled up and some were sent to the > hardware automatically, that shouldn't cause a buffer swap, which must > have happened for you to see things in progress... > > On Sep 2, 3:50 pm, Thiago Lopes Rosa <[email protected]> wrote: > > > > > Hi, > > > I have a 3D game and I am using color-picking to know which object was > > selected. > > > When the user touches the screen, I draw each object with a different color. > > Then I read the color where the user touched the screen to know which object > > was selected. After that I draw each object with their respective > > textures/colors. (everything done during one onDrawFrame pass) > > > The problem is that sometimes the colored objects appear on the screen (~5% > > of the times the user touches the screen) and it is even worse on slower > > hardwares. > > > This is my pseudo code: > > > public void onDrawFrame(GL10 gl) { > > if (user touched the screen) { > > gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); > > gl.glMatrixMode(GL10.GL_MODELVIEW); > > > // DRAW COLORED OBJECTS > > > gl.glReadPixels(x, y, ......); > > // CHECK WHICH OBJECT WAS SELECTED > > gl.glColor4x(0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF); > > } > > > gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); > > gl.glMatrixMode(GL10.GL_MODELVIEW); > > > // DRAW TEXTURED OBJECTS > > > } > > > As far as I understand, we always draw on the Back Buffer and only after we > > finish, it swaps to the Front Buffer and updates the screen. > > Is there anything wrong with the above code? > > > Thanks! > > > Thiago -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
