$collisionmodel
(Redirected from $drag)
Jump to navigation
Jump to search
![English (en) English (en)](/w/images/3/37/Flag-en.png)
![Translate (Translate) Translate (Translate)](/w/images/a/a8/Flag-Translate.png)
$collisionmodel
is a QC command available in all Source games.
It is used to embed a static collision mesh in a model for use in VPhysics calculations. Animated models (including ones that will become ragdolls) should use $collisionjoints instead.
![Warning.png](/w/images/thumb/c/cb/Warning.png/10px-Warning.png)
![Note.png](/w/images/thumb/c/cc/Note.png/10px-Note.png)
![Blender](/w/images/thumb/1/1c/Blender-512px.png/16px-Blender-512px.png)
![Softimage Mod Tool](/w/images/2/29/Icon_xsimod.png)
![Tip.png](/w/images/thumb/4/45/Tip.png/9px-Tip.png)
vcollide_wireframe 1
to view collision meshes in-game.Syntax
$collisionmodel <collision mesh SMD/DMX> { <options> }
Options
![Note.png](/w/images/thumb/c/cc/Note.png/10px-Note.png)
- $mass <float|kilograms>
- Manually set the mass of the model, in kilograms.
Tip:By default, the Player can +USE pick up 35KG max. The gravgun can pick up 250KG max. The portal gun can pick up 85KG max.
- $automass
- Calculate the mass of the model based on the volume of the collision model and the material defined in its prop_data.
- $concave
- By default, studiomdl will generate a single convex hull by 'shrinkwrapping' any concavities. You can create a concave hull by including multiple convex shapes (potentially overlapping) in your collision model, smoothing the hulls’ shading, and passing this command.
- $maxconvexpieces <int> (in all games since
)
- By default, the model compiler limits a concave collision model to twenty convex pieces. This command can be used to override the limit if you are creating a Costly collision model.
Note:Introduced with the Orange Box. In the Ep1 engine, run studiomdl with -fullcollide instead.
Warning:Going past a hundred or so pieces may begin to create server lag when multiple objects are touching the model.
- $masscenter <vector|offset>
- Override the center of mass, in local coords.
- $inertia <normal>
- Inertia scale. Higher values will make the physics object more sturdy, while lower values will make it more wobbly.
- $damping <float>
- Linear damping scale. Affects how quickly an object's velocity drops to zero.
- $rotdamping <float>
- Rotational damping scale. Affects how quickly an object's angular velocity drops to zero.
Warning:This affects the pull of gravity on the model and if abused can make it appear to float gently through the air. Valve recommends using "friction" instead.
- $drag <normal>
- Scales air resistance. Essentially a more subtle version of $damping.
- $jointskip
- Rarely used. Eliminates a joint in the collision model that you don't want to use. (i.e. if you were using a render model as a ragdoll, and it has bones you don't want).
- $jointmerge
- Merges the vertex assignments for two joints.
- $jointinertia
- Like $inertia, but per-bone.
- $jointdamping
- Like $damping, but per-bone.
- $jointmassbias
- Mass is automatically distributed by volume, this lets you bias it per-bone.
- $jointrotdamping
- Like $rotdamping, but per-bone.
- $jointcollide
- If any $jointcollide pairs are specified, only those joints collide with each other.
- $jointconstrain
- The limits of the joint's movement.
- $rootbone
- The parent-most bone that actually has collision geometry.
- $noselfcollisions
- Turns off all collisions between bones in this model.
- $animatedfriction
- Used to animate the amount of friction on joints over time.
- $addconvexsrc <file> "offset pos[ <float> <float> <float> ] angle[ <float> <float> <float> ] scale[ <float> ] concave" (only in
)
- Adds a convex model onto the collision model with the specified position, angle, and scale. The "concave" option is optional.
Note:It must be formatted EXACTLY like this!
- $remove2d
- Used to remove flat shaded faces. Off by default.
- $weldposition <float>
- The amount of distance tolerance to use when trying to merge vertices of separate concave pieces in order to create a single concave piece.
- $weldnormal <float>
- The amount of tolerance to check if the vertice normal is similar enough to consider merging to a unique vertice. Used in conjunction with $weldposition.
- $assumeworldspace
- Assumes the joints are positioned in world space.
Example
$collisionmodel "tree_deciduous_01a_physbox" { $mass 350.0 $concave }