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Problem about scaling GL window
Author
I modified the Lesson 5 (vB 6.0 code) to help me with my work. Simply i have added a mouseUp and mouseDown event. When mouseDown, x coordinate is recorded as xDown. When mouseUp it is recorded as xUp so
dx = dx + xUp - xDown
then i scale the window like
ReSizeGLScene Me.ScaleWidth + dx, Me.ScaleHeight
that is;
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
xDown = X
End Sub
Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
xUp = X
dx = dx + xUp - xDown
ReSizeGLScene Me.ScaleWidth + dx, Me.ScaleHeight
End Sub
but the screen is broken when dx is negative
can anyone tell me what is the problem?
if you scale a scene in negative values the result would be that you might end up with polygons facing away from the camera because of a reversed winding order,
either don't do it or flip the culling from back to front facing polygons.
either don't do it or flip the culling from back to front facing polygons.
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