Class

SKWarpGeometryGrid

A definition for a grid-based deformation of nodes that conform to SKWarpable.

Declaration

class SKWarpGeometryGrid : SKWarpGeometry

Overview

An SKWarpGeometryGrid exposes a 2D array of source positions, and set of destination positions with matching size, that allow you to define which sections of a node should be translated from the source positions to the destination positions. Conceptually, this forms two grids—a source grid and a destination grid—where the visual warping is accomplished by stretching or shrinking each section of the node as the source positions of the grid interpolate to their corresponding destination positions.

Topics

Creating a Warp Geometry Grid

init(columns: Int, rows: Int)

Creates a warp geometry grid of a specified size.

init(columns: Int, rows: Int, sourcePositions: [float2], destinationPositions: [float2])

Creates a warp geometry grid of a specific size and warp translation, in point arrays.

init?(coder: NSCoder)

Tells you when to intialize a grid that was loaded from an archive.

Animating Warping

Animate the Warping of a Sprite

Interpolate warping from source to destination warp geometry grids.

Accessing or Setting Warp Geometry Grid Size

var numberOfColumns: Int

The object's number of columns.

var numberOfRows: Int

The object's number of rows.

var vertexCount: Int

The object's total number of vertices.

Accessing or Setting Grid Vertices

Get or set float2 values that correspond to individual vertices of the grid.

func destPosition(at: Int) -> vector_float2

Returns the destination position of a vertex.

func replacingByDestinationPositions(positions: [float2]) -> SKWarpGeometryGrid

Returns a copy of this grid, updated with the argument destination positions.

func replacingBySourcePositions(positions: [float2]) -> SKWarpGeometryGrid

Returns a copy of this grid, updated with the argument source positions.

func sourcePosition(at: Int) -> vector_float2

Returns the source position of a vertex.

Relationships

Inherits From

Conforms To

See Also

Warping

class SKWarpGeometry

A definition for a deformation of nodes that conform to SKWarpable.

protocol SKWarpable

A protocol for objects that can be warped and animated by an SKWarpGeometry.