Is changing in osg:Image possible ??? I can apply a bump map to get that look of an etched object , that would be fine .... is it possible to apply a normal map or a bump map to the loaded osg file ?? But will it be computationally costly ??
On 8/23/07, Robert Osfield <[EMAIL PROTECTED]> wrote: > > HI Maruti, > > Do you actually need to modify the geometry, could you get away with > just modifying a texture (or more precisely the texture's osg::Image) > ? > > As for the osggeometry example not showing you how to modify geometry, > well modifying geometry is a complicated topic, your own needs are > very very specific. The OSG is primarily a real-time graphics API, > its not a general purpose tool for scene construction so the API and > examples are geared up for rendering rather than editing. > > Editing is possible - in fact there are modellers based on the OSG, > but you'll need to learn about the internals of osg::Geometry and how > to go about creating vertices, new primitives etc. There is no easy > way to jump in a know all this stuff, I'm afraid you'll need to be > patient and work you way up to it. > > Robert. > > On 8/23/07, maruti borker <[EMAIL PROTECTED]> wrote: > > 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 > > > osg-users@lists.openscenegraph.org > > > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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