$collisionjoints

The QC command $collisionjoints is used to define a jointed collision model for a ragdoll. A jointed collision model is used by VPhysics to detect collisions and animate the model's Skeleton accordingly.

Jointed collision models are most often used for ragdolls, but also work for animated movement.

Tip:Use vcollide_wireframe 1 to view collision meshes in-game.

Tip:If your model has no moving parts that need to collide, use $collisionmodel.

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

Note:

Confirm:There can be up to 25 collision joints in a ragdoll.

Syntax

$collisionjoints <collision mesh SMD>
{
    <options>
}

Options

All $collisionmodel options, except $concave

Each individual bone's collision mesh is convex. Only concavity between bones is permitted.

$rootbone <string|bone>

Overrides the SMD's root bone.

Todo: Purpose.

$jointskip <string|bone>

Eliminates a joint in the skeleton that you don't want to use in collisions.

$jointmerge <string|bone1> <string|bone2>

Merges the vertex assignments for two joints.

$jointconstrain <string|bone> <axis> <allow_option> <min_angle> <max_angle> <friction>

Limits of the a bone's movement relative to its parent bone. See $jointconstrain for a full description.

$jointinertia <string|bone> <float|scale>

Per-bone $inertia.

$jointdamping <string|bone> <float|scale>

Per-bone $damping.

$jointrotdamping <string|bone> <float|scale>

Per-bone $rotdamping.

$jointmassbias <string|bone> <float|bias>

Mass is automatically distributed by volume, this lets you bias it per-bone.

Todo: Difference from a $weightlist.

$noselfcollisions

Disables collisions between bones in the same collision model for performance.

Warning:Results in arms clipping through torsos and other weirdness if used improperly!

$jointcollide <string|bone1> <string|bone2>

If any $jointcollide pairs are specified, only those joints collide with each other.

$animatedfriction <float|FrictionTimeIn> <float|FrictionTimeOut> <float|FrictionTimeHold> <float|MinAnimatedFriction> <float|MaxAnimatedFriction>

Used to animate the amount of friction on joints over time.

Example

$collisionjoints "bip01_phys.smd"
{
	$mass			115.0
	$inertia		2.00
	$damping		0.01
	$rotdamping		0.40
	$rootbone		"bip01_pelvis"
	$jointmerge		"bip01_pelvis"	"bip01_spine"

	$jointmassbias		"bip01_l_arm2"	2.00
	$jointconstrain		"bip01_l_arm2"	x limit	0.00 0.00 0.00
	$jointconstrain		"bip01_l_arm2"	y limit	0.00 0.00 0.00
	$jointconstrain		"bip01_l_arm2"	z limit	-120.00 4.00 0.20

	$jointrotdamping	"bip01_head"	5.00
	$jointconstrain		"bip01_head"	x limit	-20.00 20.00 0.00
	$jointconstrain		"bip01_head"	y limit	-25.00 25.00 0.04
	$jointconstrain		"bip01_head"	z limit	-13.00 30.00 0.04
}

See also

• $weightlist
• VPhysics
• Physics and Ragdolls
• $collisionmodel