Define transform matrices to apply affine transformations to layers in Core Animation.
Framework
- Core Animation
Transforms
Topics
Creating Transforms
func CATransform3DMakeReturns a transform that translates by (tx, ty, tz).
func CATransform3DMakeReturns a transform that scales by (sx, sy, sz).
func CATransform3DMakeReturns a transform that rotates by angle radians about the vector (x, y, z).
Chaining Transforms
func CATransform3DConcat(CATransform3D, CATransform3D) -> CATransform3DConcatenates b to a and returns the result: t = a * b.
func CATransform3DTranslate(CATransform3D, CGFloat, CGFloat, CGFloat) -> CATransform3DTranslates t by (tx, ty, tz) and returns the result: t = translate(tx, ty, tz) * t.
func CATransform3DScale(CATransform3D, CGFloat, CGFloat, CGFloat) -> CATransform3DScales t by (sx, sy, sz) and returns the result: t = scale(sx, sy, sz) * t.
func CATransform3DRotate(CATransform3D, CGFloat, CGFloat, CGFloat, CGFloat) -> CATransform3DRotates t by angle radians about the vector (x, y, z) and returns the result.
Inverting a Transform
func CATransform3DInvert(CATransform3D) -> CATransform3DInverts t and returns the result.
Determining Transform Properties
func CATransform3DIsReturns true if t can be exactly represented by an affine transform.
func CATransform3DIsReturns a Boolean value that indicates whether the transform is the identity transform.
func CATransform3DEqualReturns a Boolean value that indicates whether the two transforms are exactly equal.
Converting to and from Core Graphics Affine Transforms
func CATransform3DMakeReturns a transform with the same effect as affine transform m.
func CATransform3DGetReturns the affine transform represented by t.
Data Types
struct CATransform3DThe standard transform matrix used throughout Core Animation.
Constants
let CATransform3DIdentity: CATransform3DThe identity transform: [1 0 0 0; 0 1 0 0; 0 0 1 0; 0 0 0 1].