Interaction between collider types

This page describes which event functions Unity generates based on the configuration of each collider in a collision pair.

Collision generates collision detection messages

When a pair of colliders make contact, they generate collision detection messages if the following are both true:

• There is at least one dynamic collider.
• The other collider is a static collider, a kinematic collider, or another dynamic collider.

The following table describes each combination of collider types. A “Y” indicates a combination that can generate collision detection and collision messages.

Remember that Unity only applies physics forces to collider GameObjects that have a physics body (a Rigidbody or ArticulationBody). When a physics body collider collides with a static collider, only the physics body collider behavior changes as a result of the collision (for example, it might bounce or slow down as a result of the collision).

Collision generates trigger messages

Trigger messages occur in the following circumstances:

• A dynamic or kinematic trigger collider collides with any collider type.
• A static trigger collider collides with any dynamic or Kinematic collider.

The following table describes each combination of collider types. A “Y” indicates a combination that can generate trigger messages from any trigger collider in the pair.