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Legacy:Actor (UT)/Movement

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Properties that relate to location, orientation and movement.

AttachTag 
see Attaching Actors
bBounce 
Bounces when hits ground fast
bFixedRotationDir 
Fixed direction of rotation
bRotateToDesired 
Rotate to DesiredRotation
Buoyancy 
Water buoyancy define values
DesiredRotation 
Physics will smoothly rotate actor to this rotation if bRotateToDesired.
Location 
a vector giving the position of the actor in the world. Remember when setting this that the engine uses a left-handed coordinate system (see Wikipedia:Handedness for definition & pictures).
Mass 
Mass of this actor. define values
Physics 
see PhysicsType for the list
Rotation 
see below.
RotationRate 
Change in rotation per second.
Velocity 
Actor's velocity.

Rotation[edit]

Rotations are measured in unreal rotation units. A right angle is 16384.

Note that an actor's rotation can be set graphically: Setting Advanced -> bDirectional to True will cause UnrealEd to display a direction arrow on the actor. It is then possible to rotate it the same way as a brush.

Quick definition of the rotation angles. Imagine you are standing at the origin, facing the positive X axis.

Pitch 
Tilting forward or backward, dipping on the X axis.
Roll  
Wobbling from side to side, dipping on the Y axis.
Yaw  
Turning from left to right.

Related Topics[edit]