Contents Articles Behaviors Books Director News Director Web Sites FAQ Games Mailing Lists News Groups Project Examples Reviews Software Tools Useful Web Sites Utilities Xtras

Don't miss these
 Power Blender Flip Sprite - Make a sprite appear to rotate in 3-D space. ToolTip Behavior Jeff's Platform Game Engine v2 Pan QTVR Sprite RADEMAIL Puzzler II, Slide it! TAGGuard Irregular Slider Slide show

# Vector Shape - Create Ellipse (Improved)

 Compatibilities: This item has not yet been rated

Author: Chunick (website)

This is a more accurate algorithm which will draw an ellipse or circle more accurately. In fact, it's impossible to draw a perfect circle using bezier curves, but we can approximate it very closely using kappa (k). For those interested, info can be found here: http://www.whizkidtech.redprince.net/bezier/circle/

 on createEllipse (aWidth, aHeight)      rX = aWidth / 2.0   if voidP(aHeight) then aHeight = aWidth   rY = aHeight / 2.0   pt1 = point(rX*cos(3.92699081698724), rY*sin(3.92699081698724))   pt2 = point(rX*cos(5.49778714378214), rY*sin(5.49778714378214))   pt3 = point(rX*cos(0.78539816339745), rY*sin(0.78539816339745))   pt4 = point(rX*cos(2.35619449019234), rY*sin(2.35619449019234))      k = 0.552284749830794      vertList = [[#vertex: pt1, #handle1: pt1 * point(-k, k), #handle2: pt1 * point(k, -k)], [#vertex: pt2, #handle1: pt2 * point(k, -k), #handle2: pt2 * point(-k, k)], [#vertex: pt3, #handle1: pt3 * point(-k, k), #handle2: pt3 * point(k, -k)], [#vertex: pt4, #handle1: pt4 * point(k, -k), #handle2: pt4 * point(-k, k)]]      return vertList    end

 Contact MMI 36 South Court Sq Suite 300 Newnan, GA 30263 USA Send e-mail