Render primitives are generated at a rate of 100 per second and disappear outside of 5 units from the origin. A ParticleSet node is the container for the particle set declaration. A ParticleSet node is an alternative node to a shape node. A render primitive, one per ParticleSet, describes the type of primitive that is animated by the particle set. These initial values may be fixed or distributed randomly in a range.
Animators are elements that update rendering primitive characteristics.
Targets identify individual values in the render primitive, such as color, position, or velocity, to which to apply specific initializers and animators. Node Types Description ParticleSet Top-level container node Contains render primitive, targets, obstacles. The Parameter.content, Target, and Obstacle.content parameter entities are in turn describe in following sections. An X3D render primitive is not a separately defined entity, but one of several existing types of X3D nodes. Image instances are always oriented toward the screen.