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79 lines
1.7 KiB
79 lines
1.7 KiB
package mightypork.rogue.world;
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import java.io.IOException;
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import mightypork.util.ion.IonBinary;
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import mightypork.util.ion.IonInput;
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import mightypork.util.ion.IonOutput;
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public class PathStep implements IonBinary {
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public static final PathStep NORTH = new PathStep(0, -1);
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public static final PathStep SOUTH = new PathStep(0, 1);
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public static final PathStep EAST = new PathStep(1, 0);
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public static final PathStep WEST = new PathStep(-1, 0);
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public static final PathStep NORTH_EAST = new PathStep(1, -1);
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public static final PathStep NORTH_WEST = new PathStep(-1, -1);
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public static final PathStep SOUTH_EAST = new PathStep(1, 1);
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public static final PathStep SOUTH_WEST = new PathStep(-1, 1);
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public static final PathStep NONE = new PathStep(0, 0);
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public static PathStep make(int x, int y)
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{
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x = x < 0 ? -1 : x > 0 ? 1 : 0;
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y = y < 0 ? -1 : y > 0 ? 1 : 0;
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if (x == 0 && y == -1) return NORTH;
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if (x == 0 && y == 1) return SOUTH;
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if (x == -1 && y == 0) return WEST;
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if (x == 1 && y == 0) return EAST;
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if (x == -1 && y == -1) return NORTH_WEST;
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if (x == 1 && y == -1) return NORTH_EAST;
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if (x == -1 && y == 1) return SOUTH_WEST;
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if (x == 1 && y == 1) return SOUTH_EAST;
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if (x == 0 && y == 0) return NONE;
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return new PathStep(x, y);
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}
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public static final int ION_MARK = 0;
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public int x;
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public int y;
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public PathStep(int x, int y)
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{
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this.x = x < 0 ? -1 : x > 0 ? 1 : 0;
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this.y = y < 0 ? -1 : y > 0 ? 1 : 0;
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}
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@Override
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public void load(IonInput in) throws IOException
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{
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x = in.readByte();
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y = in.readByte();
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}
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@Override
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public void save(IonOutput out) throws IOException
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{
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out.writeByte(x);
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out.writeByte(y);
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}
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@Override
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public short getIonMark()
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{
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return ION_MARK;
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}
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}
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