Hey Scott A recent update made on the engine now has source being updated for DrawSegment objects to point of the original Segment object that it was created for. This will carry across to mouse interaction, so a click on a segment will now return a MouseEvent3D object that has event.object as the Segment object for clicks on a DrawSegment
hth! Rob On Thu, Apr 23, 2009 at 9:05 PM, scott <[email protected]> wrote: > > Hello, > > Hopefully someone can give some insight on this - I searched the forum > and it doesn't look like this one's been answered before. I'm trying > to figure out how to get a Segment from a DrawSegment. For instance, > if the user clicks on a DrawSegment on the screen, I'd like to figure > out the Segment that that DrawSegment corresponds to in the clicked > Mesh/Object3D. For a DrawTriangle you can retrieve the corresponding > face object by referencing (myMouseEvent.drawpri as > DrawTriangle).faceVO.face, but I don't see any similar way to do this > for a DrawSegment. > > So far I tried getting the two ScreenVertex endpoints of the > DrawSegment and using deperspective() to convert those ScreenVertices > to Vertices, creating a new Segment with the Vertices, then comparing > that Segment to Segments contained in the clicked Mesh in order to > find the corresponding one. > > Here's the code at the core of it - > > function GetSegmentFromDrawSegment(drawSegment:DrawSegment):Segment > { > var screenV0:ScreenVertex = drawSegment.v0; > var screenV1:ScreenVertex = drawSegment.v1; > var v0:Vertex; > var v1:Vertex; > var segment:Segment; > > v0 = screenV0.deperspective(drawSegment.view.camera.focus); //get > vertex from screen vertex > v1 = screenV1.deperspective(drawSegment.view.camera.focus); > > segment = new Segment(v0, v1); > > return segment; > } > > However, when I run it, conversion of the DrawSegment ScreenVertices > to Vertices gives position (x,y,z) values that are way off of the > actual corresponding Segment in the model, so I must be doing > something wrong and/or misunderstanding how things work at the heart > of the engine. If anyone can offer advice I'd appreciate it. > > Thanks, > > Scott -- Rob Bateman Flash Development & Consultancy [email protected] www.infiniteturtles.co.uk www.away3d.com
