Graphics Compatibility System (GCS). Primer on Computer Graphics Programming. Programmers Reference Manual (1978)
Defense Technical Information Center · leaf 36
A USER'S CALL TO PEN MOVEMENTS ARE WITH THESE PEN MOVEMENTS. IF WITHIN THE RESPECT TO THE USER SPECIFIED VIRTUAL VIRTUAL WINDOW OF THE FIRST DIAGRAM. WINDOW. WILL ACTUALLY APPEAR WITHIN THE USER SPECIFIED DEVICE WINDOW OF THE ABOVE DIAGRAM. DEVICE WINDOW … THIS ACTUALLY OCCURS AS THE RESULT OF A MAPPING DIRECTLY FROM THE VIRTUAL WINDOW TO THE DEVICE WINDOW. FOR EXAMPLE. THOSE PEN MOVEMENTS WHICH WILL ACTUALLY APPEAR WITHIN FALL WITHIN THIS PARTICULAR VIRTUAL THIS PARTICULAR DEVICE WINDOW. WINDOW Figure 3-1. The Viewporting Concept 0791-1 ill-5
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