# Primitive3DProtocol A set of methods common to Spatial primitives. ``` protocol Primitive3DProtocol : Rotatable3DProtocol ``` ## Topics ### Instance Properties [`var isFinite: Bool`](/documentation/Spatial/Primitive3DProtocol/isFinite) Returns whether the primitive is finite. [`var isNaN: Bool`](/documentation/Spatial/Primitive3DProtocol/isNaN) Returns whether the primitive contains any `NaN` values. [`var isZero: Bool`](/documentation/Spatial/Primitive3DProtocol/isZero) Returns whether the primitive is zero. ### Instance Methods [`func apply(Self.Pose)`](/documentation/Spatial/Primitive3DProtocol/apply(_:)-1qcu6) Applies a pose. [`func apply(Self.ProjectiveTransform)`](/documentation/Spatial/Primitive3DProtocol/apply(_:)-3bne6) Applies a projective transform. [`func apply(Self.AffineTransform)`](/documentation/Spatial/Primitive3DProtocol/apply(_:)-6b1fd) Applies an affine transform. [`func applying(Self.AffineTransform) -> Self`](/documentation/Spatial/Primitive3DProtocol/applying(_:)-1tt2b) Returns the primitive that results from applying an affine transform to the primitive. [`func applying(Self.Pose) -> Self`](/documentation/Spatial/Primitive3DProtocol/applying(_:)-4ylq8) Returns the primitive that results from applying a pose to the primitive. [`func applying(Self.ProjectiveTransform) -> Self`](/documentation/Spatial/Primitive3DProtocol/applying(_:)-690k5) Returns the primitive that results from applying a projective transform to the primitive. [`func unapply(Self.ProjectiveTransform)`](/documentation/Spatial/Primitive3DProtocol/unapply(_:)-22esh) Unapplies a projective transform. [`func unapply(Self.AffineTransform)`](/documentation/Spatial/Primitive3DProtocol/unapply(_:)-34afa) Unapplies an affine transform. [`func unapply(Self.Pose)`](/documentation/Spatial/Primitive3DProtocol/unapply(_:)-5dfj2) Unapplies a pose. [`func unapplying(Self.ProjectiveTransform) -> Self`](/documentation/Spatial/Primitive3DProtocol/unapplying(_:)-1px2q) Returns the primitive that results from unapplying a projective transform to the primitive. [`func unapplying(Self.AffineTransform) -> Self`](/documentation/Spatial/Primitive3DProtocol/unapplying(_:)-53rsn) Returns the primitive that results from unapplying an affine transform to the primitive. [`func unapplying(Self.Pose) -> Self`](/documentation/Spatial/Primitive3DProtocol/unapplying(_:)-5fmf2) Returns the primitive that results from unapplying a pose to the primitive. ### Type Properties [`static var infinity: Self`](/documentation/Spatial/Primitive3DProtocol/infinity) A primitive with infinite values. [`static var zero: Self`](/documentation/Spatial/Primitive3DProtocol/zero) A primitive with zero values. ## Relationships ### Conforming Types [`Point3DFloat`](/documentation/Spatial/Point3DFloat) [`Rect3D`](/documentation/Spatial/Rect3D) [`Vector3D`](/documentation/Spatial/Vector3D) [`Rect3DFloat`](/documentation/Spatial/Rect3DFloat) [`Size3DFloat`](/documentation/Spatial/Size3DFloat) [`Ray3DFloat`](/documentation/Spatial/Ray3DFloat) [`Vector3DFloat`](/documentation/Spatial/Vector3DFloat) [`Ray3D`](/documentation/Spatial/Ray3D) [`Point3D`](/documentation/Spatial/Point3D) [`Size3D`](/documentation/Spatial/Size3D) ### Inherits From [`SpatialTypeProtocol`](/documentation/Spatial/SpatialTypeProtocol) [`Encodable`](/documentation/Swift/Encodable) [`Rotatable3DProtocol`](/documentation/Spatial/Rotatable3DProtocol) [`Equatable`](/documentation/Swift/Equatable) [`Decodable`](/documentation/Swift/Decodable) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)