Glyphs

Instance Method

previousOncurveNode(from:)previousOncurveNodeFromIndex:previousOncurveNodeFromIndex_

The previous on-curve node before an index.

func previousOncurveNode(from index: Int) -> GSNode?
- (GSNode *) previousOncurveNodeFromIndex:(NSInteger) index;
previousOncurveNodeFromIndex_(index: int) -> GSNode

Discussion

For a closed path, navigation wraps around the path. For an open path, returns nil when no previous on-curve node exists. For a path consisting solely of off-curve nodes, returns nil.

See Also

Node Navigation

  • node(at:)

    The node at an index.

  • index(of:)

    The index of a node, or nil when the node is not in the path.

  • firstOncurveNodeIndex()

    An index from which every segment can be traversed in node order.

  • nextOncurveNode(from:)

    The next on-curve node after an index.

  • startNode

    For open paths, returns the first node of the path, otherwise nil.

  • endNode

    For open paths, returns the last node of the path, otherwise nil.

  • findStartNode()

    The node used to begin traversing a closed path, or nil for an open path.

  • findMinNode()

    The lowest on-curve node, preferring the leftmost node at equal height.

  • fixStartNode()

    Moves trailing off-curve nodes to the beginning of a closed path.

  • makeNodeFirst(_:)

    Makes a node the start node of the path.

  • indexOfTTStartNode()

    The index preceding the first on-curve node for TrueType path traversal.

See Also

Node Navigation