66 lines
1.6 KiB
Dart
66 lines
1.6 KiB
Dart
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part of "generator.dart";
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// TODO: There are many more efficient ways to do this
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class DirectionSet {
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final Set<Direction> directions;
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DirectionSet(this.directions);
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DirectionSet flip() {
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var ds2 = DirectionSet({});
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for (var i in directions) {
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switch (i) {
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case Direction.up:
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ds2.directions.add(Direction.up);
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case Direction.left:
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ds2.directions.add(Direction.right);
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case Direction.down:
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ds2.directions.add(Direction.down);
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case Direction.right:
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ds2.directions.add(Direction.left);
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}
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}
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return ds2;
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}
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DirectionSet rotateLeft() {
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var ds2 = DirectionSet({});
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for (var i in directions) {
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switch (i) {
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case Direction.up:
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ds2.directions.add(Direction.left);
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case Direction.left:
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ds2.directions.add(Direction.down);
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case Direction.down:
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ds2.directions.add(Direction.right);
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case Direction.right:
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ds2.directions.add(Direction.up);
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}
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}
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return ds2;
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}
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DirectionSet rotateRight() {
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var ds2 = DirectionSet({});
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for (var i in directions) {
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switch (i) {
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case Direction.up:
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ds2.directions.add(Direction.right);
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case Direction.right:
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ds2.directions.add(Direction.down);
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case Direction.down:
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ds2.directions.add(Direction.left);
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case Direction.left:
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ds2.directions.add(Direction.up);
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}
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}
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return ds2;
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}
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DirectionSet clone() {
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var ds2 = DirectionSet({});
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ds2.directions.addAll(directions);
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return ds2;
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}
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}
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