Dynamic Active State Triggering for Pre-Fractured RBD Objects in Houdini

Horrible title aside, this little weekend project of mine demonstrates the use of the Active State DOP to switches objects from an inactive state to an active state.

The color changes to red to indicate the RBD Object is active, and the white state is inactive. Note that whilst "inactive", it is still recognized as an object for collisions.

Basically, on every simulation frame, the active state object dop looks up a series of points in SOPs, checking to see if the objects are within the radius of a specified object (which in this case, is the hollow sphere thing). Once the object is inside the specified radius, an attribute is set. To ensure that this attribute is triggered and held, this sequence is passed into CHOPs - utilizing the Hold CHOP to do a value hold on a trigger.

Category:

Film & Animation

Tags:

• houdini
• rbd
• fracture
• voronoi
• shatter
• active
• state
• dop