Method for drawing rotating elliptical arc

Method for drawing rotating elliptical arc

  • CN 101,625,765 B
  • Filed: 08/18/2009
  • Issued: 07/15/2015
  • Est. Priority Date: 08/18/2009
  • Status: Active Grant
First Claim
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1. a method for drafting for rotating elliptical arc, is characterized in that, comprises following steps:

  • Ellipse of revolution corresponding for rotating elliptical arc is decomposed into standard ellipse and this standard ellipse is transformed into the transformation matrix needed for this ellipse of revolution, the major axis of described standard ellipse or minor axis parallel are in transverse axis;

    Determine to combine each point coordinate that described rotating elliptical arc is corresponding in described standard ellipse each point coordinate corresponding in described standard ellipse with described transformation matrix, obtain each point coordinate on rotating elliptical arc;

    According to point coordinate each on described rotating elliptical arc, draw described rotating elliptical arc on a display screen.

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