Well, the current naive approach I am taking in my project is to rebuid the drawables from scratch when they change its shape or number of primitives. It is not really that slow.
You can also find the changed primitives in the Drawable list and, as these lists are derived from STL containers, easily erase them and then insert the new corresponding three triangles. Do not forget to "dirty" the display list in order to communicate the OSG that the object has changed. HTH, Alberto El Jueves 23 Agosto 2007, maruti borker escribió: > I tried out what u said , i got the node using Linesegement intersector , > then i will got drawable class , then by using TriangleFunctor class , i > am able to get all the triangles with their normals , now my i need to > push the point a bit inside so that it looks etched , so i will decrease it > by using its normal . That means divide the triangles and make 3 triangles > , but how shud i add these triangles to the drawable class and delete the > old trianlge, and see the effect in the window . My basic doubt is how shud > i edit the mesh , i didnt find any editing in osggeometry example . :( > > Thanx in advance > PS: I think just by pushing a point wont help so i need to push a a square > region :( > > On 8/11/07, Alberto Luaces <[EMAIL PROTECTED]> wrote: > > Could you post what you have coded so far in order to see what is wrong? > > For > > now, just post the mesh modification code. Could it also be that you are > > not > > calling osg::Drawable::dirtyDisplayList() so the drawable never gets > > modified? > > > > Alberto > > > > El Sábado 11 Agosto 2007, maruti borker escribió: > > > I was not able to edit the mesh data.. can u give some more refernces > > > ?? > > > > > > On 8/8/07, Alberto Luaces <[EMAIL PROTECTED]> wrote: > > > > El Martes 07 Agosto 2007, maruti borker escribió: > > > > > HI everyone > > > > > I am a n00b in OSG and i am using OSG 2.0 in > > > > linux . > > > > > > I > > > > > > > > > wam developing a system which will needs an option where the user > > > > can > > > > > > > change the loaded model by mouse clicks . The result of one mouse > > > > click > > > > > > > shud engrave a point at that point . That is , if i drag on the > > > > model > > > > > > and > > > > > > > > > draw a line then the line shud be engraved on the model . > > > > > > > > > > So what i did was used osgUtil::LIneSegementIntersecto > > > > r::Intersection > > > > > > to > > > > > > > > > find the intersection and then get the points , and then move the > > > > > points > > > > > > > > in > > > > > > > > > a direction negative to the direction of the plane normal . But i > > > > dont > > > > > > have > > > > > > > > > any idea to implement this any help ???? > > > > > > > > > > Thanx > > > > > - > > > > > Maruti Borker > > > > > > > > Hi, > > > > > > > > as you mentioned, you can use the LineSegementIntersector, and then > > > > get > > > > > > the > > > > mesh data from the nodes you picked, transform it and modify the > > > > drawable's > > > > nodes. To get and modify the mesh data of a Geode, see the > > > > osggeometry example. It can also help using the osg::TriangleFunctor > > > > class. > > > > > > > > HTH, > > > > > > > > Alberto _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
