$collisionmodel

(Redirected from $rotdamping)

The QC command $collisionmodel is used to embed a non-animated collision mesh in a model, for use in VPhysics calculations.

Note: If your model has moving parts that may affect collisions, such as ragdoll limbs, use $collisionjoints instead.

Note: Collision meshes should be extremely lo-poly in comparison to reference meshes, and even lod meshes. See collision mesh.

Tip: Set the Console Variable vcollide_wireframe 1 to view collision meshes in-game.

Table of contents

1 Syntax

Syntax

$collisionmodel "<collision mesh SMD>.smd"
{
    <options>
}

$mass <float|kilograms>: Manually set the mass of the model, in kilograms.

Tip: By default, the Player can +USE pickup 35kg max. The gravgun can pickup 250kg 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, the model compiler will generate a single convex hull by bridging any concavities in a collision SMD. You can create a concave hull by including multiple, overlapping convex meshes in your SMD, and adding the $concave will preserve concavities by using multiple convex pieces. The resulting hull structure is a bit like a rigid ragdoll.

$maxconvexpieces <int>: By default, the model compiler limits a concave collision model to twenty convex pieces. This command can be used to override the limit - for instance if you are creating an unusually large model.

Note: Introduced with the Orange Box. In the Ep1 engine, run StudioMDL with -fullcollide when compiling instead.

$masscenter <vector|offset>: Override the center of mass, in local coords.

$collisionmodel "tree_deciduous_01a_physbox.smd"
{
	$mass 350.0
	$concave
}