Basic HTML version of Foils prepared
13 July 98
Foil 55 Rotation About a Point
From
Java Academy II:Advanced Java NPAC/ECS Java Academy --
February to April 98
.
by
Tom Scavo
To rotate a polygon about an arbitrary point p, we must do the following:
translate the origin to point p
rotate each vertex of the polygon
translate back to original coordinates
So rotation of polygons boils down to rotations of points about the origin
Unfortunately, the Point class is of no help!
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