Hey Rujia i'm a little confused, are you talking about perspective problems with rendering triangles in Flash 9? If so, have you considered trying the Flash 10 branch of Away3D?
I'm not sure how using quads would help the problems you are desribing - would it be possible to elaborate? In Flash10, all solid geometry is rendered using the drawtriangles method which requires everything to be triangle based. So even if you define a quad, it still has to be split into triangles to render. This is, in fact, the approach taken with Away3D Lite primitives. Looking at the source there may help cheers Rob On Sun, Jun 27, 2010 at 10:23 AM, Rujia Liu <[email protected]> wrote: > Hi everyone, > > In my project, I havily used the "plane" primitive. My project is related > to home decoration, currently every wall is a plane, and the doors and > windows are also planes. finally, the floor is a big plane. In order to > render textures correctly, a common way is to increase SegmentW and SegmentH > when creating the plane, but it would be great if we can create a > "quad-based" plane primitive, as available in Flash Sandy engine. (my > project used flash sandy at first, then moved to away3d recently) > > the basic idea of how to render a quad without splitting it to two > triangles as illustrated in the following address, though i think most of > people in this group should already know :) > > http://www.flashandmath.com/intermediate/gummy/index.html > > I've successfully used this technique in my earlier projects and I guess > (not sure) flash sandy's "quad" primitive used a similar techinique, since > the floors, and doors/windows are all rendered correctly with > segmentW=segmentH=1. but in away3d, i had to use segmentW=segmentH=20 to > make them look reasonably good (floors and bricks have gaps, an error would > be obvious if the gaps are zigzag, not straight), but since there are quite > a few doors, windows and wall bricks, there will be a lot of triangles (the > performance is already a problem in my project) > > It's ok to add/modify away3d's source code, so please tell me if you only > have any idea. Thanks! > > BTW: I found an article that might help, but I'm not sure if this is indeed > feasble, and whether there are better options. > > http://samplerinfo.com/?p=10 > > (This is my first post in this group, please tell me If I'm doing anything > wrong with respect to this group's rules) > > Yours, > Rujia Liu > > -- Rob Bateman Flash Development & Consultancy [email protected] www.infiniteturtles.co.uk www.away3d.com
