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Part X: Dynamic Animation
reactor Troubleshooting
reactor identifies problems before you try to preview or compute the simulation. These problems are dis-
played in an error window. The following are some common errors that you can avoid. Use the Analyze
World button to look for warnings:
l Don’t use the default Plane primitive: reactor complains if the plane object is coplanar. The
problem is that without any depth, reactor can’t accurately compute collisions. Instead, use a Box
primitive or use reactor’s Plane Primitive object (found in its toolbar). However, you can use a
plane object if you make it a Concave Mesh.
l Watch for low Mass values: reactor complains if the Mass value for any objects is too low. To fix
this problem, increase the Mass value for the identified object.
l Don’t have interpenetrating objects: Objects that intersect cause an error in reactor. Make sure
that none of the objects intersect with each other.
l Build all reactor objects to scale: reactor tends to work well when all objects are within one
meter of each other. Objects that are too small or too big tend to have issues with collisions.
Summary
This chapter covered the basics of animating a dynamic simulation using reactor. In this chapter, you
accomplished the following:
l Experimented with the reactor plug-in
l Worked with collections
l Applied reactor modifiers
l Used reactor objects
l Previewed reactor animations
l Used constraints
The next chapter covers the dynamic abilities of Max’s hair and cloth systems.

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