Phys pulleyconstraint

Description

A constraint that is essentially two length constraints and two points. Imagine it as a virtual rope connected to two pulleyed objects, specified in the Entity 1 (attach1) and Entity 2 (attach2) keyvalues, each suspended from a pulley above them.

Pulley point 1 - the pulley from which Entity 1 is always suspended from - is the origin of this constraint entity.

Pulley point 2 - the pulley from which Entity 2 is always suspended from - is the position of the "blue ball", set by altering the Pulley Position 2 (position2) keyvalue directly, or by using the Helper Tool.

The constraint keeps the sum of the distances between the pulley points and their suspended objects constant.

• See also A Counter-weighted Door.

Keyvalues

• TwoObjectPhysics:

Entity 1 (attach1) <targetname>

Entity 2 (attach2) <targetname>

The entities to constrain. Leave one or the other field blank to constrain to the world.

Note:Only one entity will be constrained, even if several share the given targetname.

Constraint System Manager (constraintsystem) <targetname>

A phys_constraintsystem that this constraint should be a part of. This avoids the "jiggling" caused by constraints applied to the same set of entities fighting with each other.

Force Limit to Break (forcelimit) <float>

Impact force required to break the constraint, in pounds. 0 means infinite. A way of calculating this is to set it to the weight of an object that would break the constraint if it were resting on its objects.

Torque Limit to Break (torquelimit) <float>

Torque required to break the constraint, in pounds*inches. 0 means infinite. A way of calculating this is to multiply any reference mass by the resting distance (from the center of mass of the object) needed to break the constraint.

Play Sound on Break (breaksound) <string>

A sound played when the constraint is broken.

Follow teleport distance (teleportfollowdistance) <float>

If one constrained object teleports more than this many units away, the other will teleport with it.

• addlength <float>

Add (or subtract) this amount to the rest length of the pulley rope.

• gearratio <float>

Add (or subtract) this amount to the rest length of the pulley rope.

• position2 <vecline>

Pulley Position 2 - The position of the pulley for Entity 2. This point can be set by using the Helper Tool.

Flags

• Template:Fl TwoObjectPhysics1
• 2 : Keep Rigid

Inputs

• Break

Force the constraint to break.

• TurnOn

Enable the constraint. Do this when the objects don't exist when the constraint spawns - or when you have deactivated the constraint. Broken constraints can NOT be turned on. They have been deleted.

• TurnOff

Disable this constraint.

Outputs

• OnBreak

Fired when the constraint breaks.