****************
Collision Sensor
****************

.. figure:: /images/bge_sensor_collision.jpg
   :width: 300px

   Collision sensor.


A *Collision* sensor works like a *Touch* sensor but can also filter by
property or material. Only objects with the property/material with that name will generate a
positive pulse upon collision. Leave blank for collision with any object.

See :doc:`Sensor Common Options </game_engine/logic/sensors/common_options>` for common options.

Special Options:

Pulse button
   Makes it sensible to other collisions even if it is still in touch
   with the object that triggered the last positive pulse.
M/P button
   Toggles between material and property filtering.


.. note:: Note about soft bodies

   The *Collision* sensor cannot detect collisions with soft bodies.
   This is a limitation in Bullet, the physics library used by the Game Engine.