This is a base component for other components. Most probably you don't need to use it directly, but use a derived component instead.

Hierarchy (view full)

Accessors

  • get convexRadius(): number
  • Internally the convex radius will be subtracted from the half extent, so the total size will not grow with the convex radius. You can increase this value to make the edges of the collision shape rounded.

    Note:

    • Only used by shapes with sharp edges: SHAPE_BOX and SHAPE_CYLINDER.
    • Cannot be changed after the shape is created.

    Returns number

    Number, representing the convex radius.

    Default Value

    0.05 (m)
    
  • get debugDraw(): boolean
  • Specifies, whether to debug draw the collision shape.

    Returns boolean

    Boolean, telling if the collision shape should be drawn using lines.

    Default Value

    false
    
  • set debugDraw(bool): void
  • Allows to turn on/off debug draw for this body. Only works with a debug build.

    Parameters

    • bool: boolean

      Boolean to enable/disable a debug draw.

    Returns void

  • get density(): number
  • Density of the object. Affects the mass of the object, when BodyComponent.overrideMassProperties is set to OMP_CALCULATE_MASS_AND_INERTIA (default, which will auto-calculate the mass using the shape dimensions and this density value).

    Returns number

    Number, representing the density of this collision shape.

    Default Value

    1000 (kg / m^3)
    
  • get halfExtent(): Vec3
  • Half extent for a SHAPE_BOX.

    Returns Vec3

    Vec3 with half extent of a box collision shape.

    Default Value

    Vec3(0.5, 0.5, 0.5) (m per axis)
    
  • get halfHeight(): number
  • Half-height of radius based shapes.

    Note: Only used by SHAPE_CAPSULE and SHAPE_CYLINDER.

    Returns number

    Number, representing half of the total height of the collision shape.

    Default Value

    0.5 (m)
    
  • get hfActiveEdgeCosThresholdAngle(): number
  • Cosine of the threshold angle. If the angle between the two triangles in HeightField is bigger than this, the edge is active. note that a concave edge is always inactive. Setting this value too small can cause ghost collisions with edges. Setting it too big can cause depenetration artifacts (objects not depenetrating quickly). Valid ranges are between cos(0 degrees) and cos(90 degrees).

    Returns number

    Number, representing radians of the threshold angle.

    Default Value

    0.996195 (cos(5 degrees))
    
  • get hfBitsPerSample(): number
  • How many bits per sample to use to compress the HeightField. Can be in the range [1, 8]. Note that each sample is compressed relative to the min/max value of its block of hfBlockSize * hfBlockSize pixels so the effective precision is higher. Also note that increasing hfBlockSize saves more memory, than reducing the amount of bits per sample.

    Returns number

    Number, representing amount of compression bits.

    Default Value

    8
    
  • get hfBlockSize(): number
  • The HeightField is divided in blocks of hfBlockSize * hfBlockSize * 2 triangles and the acceleration structure culls blocks only, bigger block sizes reduce memory consumption, but also reduce query performance. Sensible values are [2, 8]. Does not need to be a power of 2. Note that at run-time Jolt performs one more grid subdivision, so the effective block size is half of what is provided here.

    Returns number

    Number, representing a block size.

    Default Value

    2
    
  • get hfOffset(): Vec3
  • Offsets the position of the HeightField, which is a surface defined by:

    hfOffset + hfScale * (x, hfHeightSamples[y * hfSampleCount + x], y)
    

    where x and y are integers in the range x and y e [0, hfSampleCount - 1].

    Returns Vec3

    Vec3 with position offset.

    Default Value

    Vec3(0, 0, 0) (m per axis)
    
  • get index(): number
  • Unique body index. This can change during entity lifecycle, e.g. every time entity is enabled, a new index is assigned and a new body is created. The index is used to map entity to body. Index can be re-used by another component if this component is disabled or destroyed (destroying related body as a result).

    Returns number

    Integer number, representing the unique body index.

    Default Value

    -1
    
  • get isCompoundChild(): boolean
  • Specifies if the component describes a child of a compound shape.

    Returns boolean

    Boolean, telling if this component describes a child shape of a compound shape.

    Default Value

    false
    
  • get massOffset(): Vec3
  • A center of mass offset in local space of the body. Does not move the shape.

    Returns Vec3

    Vec3 with center of mass offset.

    Default Value

    Vec3(0, 0, 0) (m per axis)
    
  • get radius(): number
  • Radius for radius based shapes, like SHAPE_CAPSULE, SHAPE_SPHERE, etc.

    Returns number

    Number, specifying the shape radius.

    Default Value

    0.5 (m)
    
  • get renderAsset(): null | number
  • This field contains the render asset ID, when a render asset is used for collision mesh or a convex hull.

    Returns null | number

    Asset or its ID number. Will be null if render asset is not used.

    Default Value

    null
    
  • set renderAsset(asset): void
  • Sets render asset as a collider. Note:

    • shape must be SHAPE_MESH or SHAPE_CONVEX_HULL in order for the render asset to be used.
    • If the render asset has multiple mesh instances, only the mesh from the first mesh instance is used. If you need multiple meshes, consider creating a compound collider.

    Parameters

    • asset: any

      Render asset or its id number.

    Returns void

  • get shape(): number
  • Current shape type.

    Returns number

    Number, representing the shape type.

    Default Value

    SHAPE_BOX
    
  • set shape(shapeNum): void
  • Changes the shape type. Following constants available:

    SHAPE_EMPTY
    
    SHAPE_PLANE
    
    SHAPE_BOX
    
    SHAPE_CAPSULE
    
    SHAPE_TAPERED_CAPSULE
    
    SHAPE_CYLINDER
    
    SHAPE_TAPERED_CYLINDER
    
    SHAPE_SPHERE
    
    SHAPE_MESH
    
    SHAPE_CONVEX_HULL
    
    SHAPE_HEIGHTFIELD
    
    SHAPE_STATIC_COMPOUND
    
    SHAPE_MUTABLE_COMPOUND
    

    Parameters

    • shapeNum: number

      Shape type number.

    Returns void

  • get shapePosition(): Vec3
  • Local position offset of the collision shape.

    Returns Vec3

    Vec3 with local position offset.

    Default Value

    Vec3(0, 0, 0) (m per axis)
    
  • get shapeRotation(): Quat
  • Local rotation offset of the collision shape.

    Returns Quat

    Quat with local rotation offset.

    Default Value

    Quat(0, 0, 0, 1) (identity rotation)
    
  • get useEntityScale(): boolean
  • Applies entity scale on the shape. This makes it easier to adjust the size of the collision shape by simply scaling the entity.

    Note: Some shapes do not support non-uniformed scales, like SHAPE_SPHERE. Works best with SHAPE_BOX which you can scale on any axis. Others, like capsule and cone, can't have a different radius on X and Z axis, but allow scaling Y for their height.

    Returns boolean

    Boolean, telling if the entity scale is applied on this collision shape.

    Default Value

    true
    

Methods

  • Allows to add a shape to a mutable compound shape.

    Parameters

    • shapeIndex: number

      The index of a shape to add. It can be created by createShape.

    • Optional localPos: any = Vec3.ZERO

      Local position of the shape.

    • Optional localRot: any = Quat.IDENTITY

      Local rotation of the shape.

    • Optional userData: number = 0

      User defined unsigned integer.

    Returns void

  • Allows to modify a child shape of a mutable compound shape.

    Parameters

    • childIndex: number

      The child shape index. Children indices are zero based and have no gaps.

    • Optional localPos: any = Vec3.ZERO

      Local position of the shape.

    • Optional localRot: any = Quat.IDENTITY

      Local rotation of the shape.

    • Optional shapeIndex: number = -1

      The index of a shape to add. It can be created by createShape.

    Returns void

  • Allows to remove a child shape from a mutable compound shape. The children are indexed in order they were added. Indices are zero based and have no gaps. If you remove a child, then the next child takes its index.

    For example, if you remove child under index 0, then all children shift there indices, so that the child with index 1, becomes a child with index 0, etc.

    Parameters

    • childIndex: number

      The index of a child shape to remove.

    Returns void