OpenSceneGraph 3.0

Rendering basic shapes

OSG provides an osg::ShapeDrawable class, which inherits from the osg::Drawable base class, to render basic geometry shapes quickly with plain parameters. An osg::ShapeDrawable instance always includes an osg::Shape object to indicate the specified geometry's type and properties.

The setShape() method is usually used to allocate and set a shape. For example:

shapeDrawable->setShape( new osg::Box(osg::Vec3(1.0f, 0.0f, 0.0f),
                         10.0f, 10.0f, 5.0f) );

It will assign a box with a center point at (1.0, 0.0, 0.0) in its local coordinate space, width and height of 10, and depth of 5. Here, the class osg::Vec3 represents a three-element vector in OSG. Other predefined classes such as osg::Vec2 and osg::Vec4 will also help when defining ...