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GML Code Example
|fixture||the index of the fixture|
|state||whether a fixture is a sensor (true) or not (false)|
Some times you will want your game to detect and recognise when
two instances with fixtures collide, but not have any physical
reaction to the collision. This can be done by converting the
fixture into a sensor, which basically means that they will
generate a collision event but with no physical response so that
you can use these instances as "triggers" for other events to
happen in the game room. Any fixture can be flagged as a sensor,
and it makes no difference if the instance it is bound to is static
or in movement.
NOTE: A sensor fixture will fire off the collision event when the collision first occurs only, meaning you don't get a stream of collision events as the two bodies continue to overlap (which is what would traditionally occur). If they stop overlapping and overlap subsequently there will be another collision event triggered.