Misc/abrash-black-book
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James Gregory 2013-12-30 18:34:31 +11:00
commit 18011c595a
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50-04.md
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@ -3,11 +3,11 @@
------------------------ --------------------------------- --------------------
The other 2-D element we need is some way to erase the polygon at its
old location before it’s moved and redrawn. We’ll do that by remembering
the bounding rectangle of the polygon each time it’s drawn, then erasing
old location before it's moved and redrawn. We'll do that by remembering
the bounding rectangle of the polygon each time it's drawn, then erasing
by clearing that area with a rectangle fill.
With the 2-D side of the picture well under control, we’re ready to
With the 2-D side of the picture well under control, we're ready to
concentrate on the good stuff. Listings 50.2 through 50.5 are the sample
3-D animation program. Listing 50.2 provides matrix multiplication
functions in a straightforward fashion. Listing 50.3 transforms,
@ -79,9 +79,9 @@ but it will certainly reduce confusion!
represents a transformation from object space through world space
to view space), then projects the transformed polygon onto the
screen and draws it in color ???Color. Also updates the extent of the
rectangle (EraseRect) that’s used to erase the screen later.
rectangle (EraseRect) that's used to erase the screen later.
Tested with Borland C++ in the small model. */
#include “polygon.h”
#include "polygon.h"
void XformAndProjectPoly(double Xform[4][4], struct Point3 * Poly,
int PolyLength, int Color)