Morph target or shape key used to deform one Primitive in a Mesh.

A PrimitiveTarget contains a POSITION attribute (and optionally NORMAL and TANGENT) that can additively deform the base attributes on a Mesh Primitive. Vertex values of 0, 0, 0 in the target will have no effect, whereas a value of 0, 1, 0 would offset that vertex in the base geometry by y+=1. Morph targets can be fully or partially applied: their default state is controlled by Mesh.getWeights, which can also be overridden for a particular instantiation of a Mesh, using Node.getWeights.

Reference:

Hierarchy

  • Property<IPrimitiveTarget>
    • PrimitiveTarget

Properties

propertyType: PRIMITIVE_TARGET

Property type.

Methods

  • Events.

  • dispose(): void
  • Removes both inbound references to and outbound references from this object. At the end of the process the object holds no references, and nothing holds references to it. A disposed object is not reusable.

  • Returns true if two properties are deeply equivalent, recursively comparing the attributes of the properties. For example, two Primitives are equivalent if they have accessors and materials with equivalent content — but not necessarily the same specific accessors and materials.

  • getAttribute(semantic: string): Accessor
  • getDefaults(): Nullable<IPrimitiveTarget>
  • getExtras(): Record<string, unknown>
  • getName(): string
  • init(): void
  • isDisposed(): boolean
  • Returns true if the node has been permanently removed from the graph.

  • listAttributes(): Accessor[]
  • listParents(): Property<IProperty>[]
  • Returns a list of all properties that hold a reference to this property. For example, a material may hold references to various textures, but a texture does not hold references to the materials that use it.

    It is often necessary to filter the results for a particular type: some resources, like Accessors, may be referenced by different types of properties. Most properties include the Root as a parent, which is usually not of interest.

    Usage:

    const materials = texture
        .listParents()
        .filter((p) => p instanceof Material)
    
  • listSemantics(): string[]
Function symbol, f(📦) → 📦, where the argument and output are a box labeled 'glTF'.

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