Скачать или смотреть Crowds simulation and ragdoll set up in Houdini 19.5 Tutorial

Overview

Agents are character skeletons with skin geometry and animation, each related to a particle-like point in a DOP simulation. Agents have a current state. A state corresponds to a clip that animates the agent while it’s in that state. A state also contains behavior nodes that modify the agent, such as DOP particle forces that move the agent’s point. At each simulation step, Houdini evaluates triggers for each agent. If a trigger matches for an agent, it activates a transition node that gives the agent a new current state.

For example, to have a crowd mill about, you could have some agents in a walk state and some in an idle state. The walk state would have behavior nodes inside to move the point of an agent in that state. A trigger could check if each agent has been in its current state for longer than a certain period. The trigger could lead to two transition nodes (walk → idle and idle → walk) to flip the state of each matching agent.

Crowds are created from points in a geometry network, where you can use the full power of Houdini' geometry nodes and create agent positions from existing models such as terrain. The actual crowd simulation runs in a simulation network, where the agents can interact with other dynamic elements.

See how to set up a crowd simulation for information on how to use the shelf tools and the network editor to create a basic crowd simulation.