How can I draw on the same form in 3D AND 2D.
What I want to do is if there is a 3D object on the screen I want to draw a rectangle with the mouse to do a zoom of that rectangle
Wat I mean :
How can I make a rubberband rectangle to make a selection on an OpenGL screen
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Look at glOrtho for 2D, and theres no problem in mixing parallel projection with perspective projection on the same scene.
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This isn’t an advanced question, so better post it in the beginners forum