Re: [osg-users] Just more 3D primitives
On 10/30/2012 5:05 AM, Christian Buchner wrote: Hi, for rendering a sphere (or any other round shapes) it might even be better to use a shader, instead of trying to tesselate the shape into a complex geometry consisting of a lot of triangles or quads. One issue with this approach, as well as the ShapeDrawable approach, is that most existing code that operates on Drawables is designed to work with osg::Geometry. If you export your scene to some format other than OSG-native (3ds, obj, flt, etc), such shader-based geometry will likely be ignored by the exporter. Just something to keep in mind. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Just more 3D primitives
I'm definitely open to having such code contributed to osgWorks, where they would be Geometry-based rather than ShapeDrawable-based. -Paul On 10/28/2012 10:28 PM, Andrey Zubarev wrote: Hi, all! In OSG we have some simple 3D primitives such as Sphere, Cylinder, etc., even Capsule! But what about more primitives, for example, Torus, Torus Arc, Truncated Pyramid, Truncated Cone, a Dish (half of Ellipsoid) and so on? I believe, all these entities could be done by hand, from the scratch. But, maybe, someone knows the source of these primitives - just to avoid re-inventing a bicycle? ... Thank you! Cheers, Andrey -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50845#50845 ___ 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
Re: [osg-users] Just more 3D primitives
HI Andrey, The OSG's Shape objects original purpose was to provide mathematically defined shapes in support of physics engines. So there isn't an attempt to provide an exhaustive range of different types of shapes, only the ones useful for physics engines. For going beyond this set there is essentially an open ended list of shapes one might want to create, so rather than chase this one simply lets the user create an osg::Geometry the shape they require. For rendering purposes I generally recommend that users avoid using the osg::Shape classes as well as the are not written to optimize rendering performance, the render side for them is just a convenience function. Robert. On 29 October 2012 04:28, Andrey Zubarev wrote: > Hi, all! > > In OSG we have some simple 3D primitives such as Sphere, Cylinder, etc., even > Capsule! But what about more primitives, for example, Torus, Torus Arc, > Truncated Pyramid, Truncated Cone, a Dish (half of Ellipsoid) and so on? > I believe, all these entities could be done by hand, from the scratch. But, > maybe, someone knows the source of these primitives - just to avoid > re-inventing a bicycle? > ... > > Thank you! > > Cheers, > Andrey > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=50845#50845 > > > > > > ___ > 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] Just more 3D primitives
Hi, all! In OSG we have some simple 3D primitives such as Sphere, Cylinder, etc., even Capsule! But what about more primitives, for example, Torus, Torus Arc, Truncated Pyramid, Truncated Cone, a Dish (half of Ellipsoid) and so on? I believe, all these entities could be done by hand, from the scratch. But, maybe, someone knows the source of these primitives - just to avoid re-inventing a bicycle? ... Thank you! Cheers, Andrey -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50845#50845 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
