On Wednesday, September 14, 2005, 8:15:29 PM, Tonny wrote: TK> Hi,
>> > Oh, by the way, do you know any way to apply 2D effects like >> > perspective? Thanks again! >> >> Perspective is not a 2D effect, it is a 3D effect. It is >> difficult to apply Perspective and other weird effects to >> complex geometry and keep the geometry as 'curves' because the >> effects do not map spline to spline. If you are willing to >> flatten the data then this becomes a simple matter of mapping >> points. TK> The most simple ways to fake perspective in 2D, is using strech/skew. TK> It will fool the human eye, but keep in mind it is not true 3D (z axis TK> is still missing). You are both half right. Its a 2.5D effect. You can do it with a 3x3 matrix (but not a 2x3 as used in SVG). One of the reasons we should have used NURBS rather than sequences of lines, cubic and quadratic beziers etc is because a perspective transform of NURB control points is the same as a perspective transform of the curve itself. Plus you can interpolate two NURBS of different order. well, anyway. TK> Of course if you are applying Thomas technique (mapping point) it will TK> be better. TK> Regards TK> Tonny Kohar -- Chris Lilley mailto:[EMAIL PROTECTED] Chair, W3C SVG Working Group W3C Graphics Activity Lead Co-Chair, W3C Hypertext CG --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
