2009

Although the helper icon doesn't appear in your rendered scene, the icon's appearance (and
in some cases, its position and orientation) will help you to set up your reactor scene
correctly.
When selected, reactor icons are white and are also larger than when not selected. When
not selected, the icon for a valid element is blue, and for an invalid element is red. What
constitutes validity depends on the particular reactor element. For instance, a
hinge on page
3969 is valid if it has the correct number of objects attached to it; a
Rigid Body Collection on
page 3922 is valid if it's not empty. Invalid elements are excluded from the simulation, and
reported as errors.
Certain icons provide additional information about how the element behaves in the
simulation. For example, the display for a valid hinge indicates the hinge position, and,
when selected, the hinge axis and any limits you have specified for the movement of the
hinged bodies.
Introducing Dynamics Simulation
This section gives a broad overview of physical simulation, and introduces
some concepts you might find useful when working with reactor.
Physical Simulation
http://www.havok.comHavok’s physics technology, used in reactor, relies on a
process known as physical simulation in order to provide a dynamic
environment for the objects in a scene. So what exactly does physical
simulation mean?
It is a process that automatically determines the motion of objects according
to their physical properties. It achieves this by encapsulating some physical
laws, like Newton’s laws of motion, within a robust, efficient engine, which
Introducing Dynamics Simulation | 3889