Hi All, As part of the Vertex Array Object support work that I have been doing on the git vertex_array_object branch I have tackled a long time issue with ShapeDrawable.
I have refactored ShapeDrawable so that it now subclasses from osg::Geometry and builds all the vertex, normal, texcoord and color arrays and primitives that are required to render the attached osg::Shape. This means fast paths are all used for the first with ShapeDrawable. To do the building of the required vertex array and primitive sets I have created an osg::BuildShapeGeometryVisitor that can now be found in the include/osg/Shape header. The ShapeDrawable uses this visitor to do it's work. This visitor is a ShapeVisitor rather than a NodeVisitor, so it's something you give to a shape to visitor i.e. osg::ref_ptr<osg::Geometry> geometry = new osg::Geometry; osg::BuildShapeGeometryVisitor dsv(geometry, tessellationHints); shape->accept(dsv); This fills in the geometry so it can then be attached to the scene graph and render, intersected etc. The visitor can be run on multiple Shape objects passing once it's initialized with it's geometry pointer so can place multiple Shape's into a single geometry. The ShapeDrawable also support CompositeShape so you can do the multiple shapes in a singel osg::Geometry via this route as well. The advantage with this new osg::Geometry based ShapeDrawable and BuildShapeGeometryVisitor is that nothing needs to be computed on the fly anymore so intersections and rendering are all faster. It's also fully compatible with VBO's and VAO's. So... for the first time the OSG will be able to render shape efficiently. This is all checked in the vertex_array_object branch, once this branch is stable and tested out in the community I'll merge with git master and will then be part of the up coming OSG-3.6 release. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
