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From HalfLife 2 Knowledge Base

phys_pulleyconstraint

Source(core) Point Entity

description

A constraint that is essentially two length constraints and two points. Imagine it as a virtual rope connected to two objects, each suspended from a pulley above them.The constraint keeps the sum of the distances between the pulley points and their suspended objects constant.

properties

• Entity 1 attach1(target_destination)
• Entity 2 attach2(target_destination)
• Constraint System Manager constraintsystem(target_destination)
  The name of a phys_constraintsystem that this constraint should be a part of. All constraints on a set of entities should be placed in the same system, or they will fight each other during simulation.
• Force Limit to Break (lbs) forcelimit(float) - default: 0
  The amount of force an impact must apply to the constraint to break it. A way of calculating this is to set it to the mass of an object that would break this constraint if it were resting on the constrainted objects.
• Torque Limit to Break (lbs * distance) torquelimit(float) - default: 0
  The amount of torque required to break the constraint. 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(sound)
  A sound played when the constraint is broken.
• Additional Length addlength(float) - default: 0
  Add (or subtract) this amount to the rest length of the pulley rope.
• Pulley Gear Ratio gearratio(float) - default: 1
  Add (or subtract) this amount to the rest length of the pulley rope.
• Pulley Position 2 position2(vecline)
  The position of the pulley for Entity 2. The pulley for Entity 1 is the origin of this constraint entity. Entity 1 is always suspended from pulley point 1, and Entity 2 is always suspended from pulley point 2.

spawn flags

• 1: No Collision until break - default: OFF
• 4: Start inactive - default: OFF
• 8: Change mass to keep stable attachment to world - default: OFF
• 1: No Collision until break - default: ON
• 2: Keep Rigid - default: OFF

inputs

• Break(void)
  Force the constraint to break.
• TurnOn(void)
  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(void)
  Disable this constraint.

outputs

• OnBreak(void)
  Fired when the constraint breaks.

related tutorials

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