RBD Example 2

Complex RBD interaction setup with multiple object types and behaviors

Overview

This example demonstrates a more complex RBD setup in Houdini, featuring multiple interacting objects with different RBD behaviors. The simulation includes dynamic, static, and animated objects, showing how different RBD types can work together in a single setup.

Preview

Full resolution preview of the RBD interaction simulation

Node Network Structure

RBD node network setup showing key components

Object Setup

Scene Components (Top to Bottom):

Ball (RBD Dynamic)

active = 1
animated = 0
deforming = 1
sleeping = 0
enable_sleeping = 0

Block Piece (RBD Dynamic on Hit)

active = 1
animated = 0
deforming = 0
sleeping = 1
enable_sleeping = 1

Spinning Tube

RBD Non-deforming Animated

Slanted Plane

RBD Non-deforming Static

Solver Configuration

RBD Bullet Solver Settings:

# Collision Geometry Settings
collision_geometry = "deforming/convex hull"
substeps = 2
friction = 0.3
bounce = 0.4

# Performance Settings
ground_plane = 1
update_frequency = 1
shape_matching = 1

Key Considerations:

Use deforming collision geometry for the dynamic ball
Enable sleeping for static objects to improve performance
Properly configure animated objects to affect dynamics
Adjust friction and bounce for realistic interactions

Best Practices

Use appropriate RBD types for each object based on its role
Configure sleeping parameters to optimize performance
Consider collision geometry type based on object complexity
Test interactions with simplified geometry first
Cache results for complex multi-object interactions