CLIPPING OF BEZIER CURVES.

Contrary to the traditional way of curve display, where a parametrically defined curve is approximated by a fine linear polygon first and then edges of this polygon are clipped and displayed even if most or all of the curve is outside the window, we clip the given Bezier curve against the clip window first and only those portions inside the window are then approximated by linear polygons and output to the graphics system for display. Hence no clipping is even required in the subsequent viewing transformation process. Two algorithms are proposed and test cases are also presented. Our algorithms require, at most, half of the execution time of the traditional way.