trigger_vphysics_motion
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Code classes:
CTriggerVPhysicsMotionCBaseVPhysicsTriggerCBaseEntity(all ents)
trigger_vphysics_motion is a brush entity present in all Source games. It can manipulate objects inside it in a number of ways. Sometimes used in Half-Life 2 for forcefield-like effects.
Bug: 
Players will lose their ability to jump when touching this trigger.
Bug: 
Players are not affected at all.
Keyvalues[edit | edit source]
- Scale of gravity
(SetGravityScale)<float> - Multiplies the gravity experienced by objects in the field. (Scale gravity of objects in the field.)
- Additional air density for drag
(SetAdditionalAirDensity)<float> - Air drag. Applies to both linear and angular velocity.
- Max velocity
(SetVelocityLimit)<float> - Maximum velocity of objects in the field. Leave at 0 to not set a maximum.
- Deceleration to limit
(SetVelocityLimitDelta)<float> - How quickly objects will lose speed when moving above Max velocity. Leave at 0 to make them instantly change to the maximum velocity. (Max amount to reduce velocity per second when it exceeds the velocity limit)
- Velocity scale/drag
(SetVelocityScale)<float> - Multiplies the velocity of objects. Note: Instead of using decimals, the velocity has to be scaled down with negative numbers.
- Max angular velocity
(SetAngVelocityLimit)<float> - How fast objects should be able to spin, in degrees per second. Leave at 0 to not set a maximum.
- Angular Velocity scale/drag
(SetAngVelocityScale)<float> - Multiplies the angular velocity of objects. Note: Instead of using decimals, the velocity has to be scaled down with negative numbers.
- Linear force
(SetLinearForce)<float> - If non-zero, objects will be pushed with this much force.
- Direction of linear force (Pitch Yaw Roll)
(SetLinearForceAngles)<angle> - Which way to push things.
- Particle Trail Material
(ParticleTrailMaterial)<sprite> - A texture to use for sprites which will appear around objects in the trigger.
- Particle Trail Lifetime
(ParticleTrailLifetime)<float> - How long a single sprite will last.
- Particle Trail Starting Sprite Size
(ParticleTrailStartSize)<float> - How big sprites are when first created.
- Particle Trail Ending Sprite Size
(ParticleTrailEndSize)<float> - The size sprites will shrink/grow to over their lifetime.
Inputs[edit | edit source]
- SetGravityScale
<float> - Sets Scale of gravity.
- SetAdditionalAirDensity
<float> - Sets Additional air density for drag.
- SetVelocityLimit
<float> - Sets Max velocity.
- SetVelocityLimitTime
<string> - Takes two numbers: the first sets Max velocity, and the second is how many seconds it should take to transition to the new value.
- SetVelocityLimitDelta
<float> - Sets Deceleration to limit.
- SetVelocityScale
<float> - Sets Velocity scale/drag.
- SetAngVelocityLimit
<float> - Sets Max angular velocity.
- SetAngVelocityScale
<float> - Sets Angular Velocity scale/drag.
- SetLinearForce
<float> - Sets Linear force.
- SetLinearForceAngles (Not in FGD)
<angle> - Sets Direction of linear force. Bug: If any physics objects are asleep inside the trigger when this input is sent, those objects will not wake.