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78 lines
1.9 KiB
78 lines
1.9 KiB
package mightypork.gamecore.util.math.algo;
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import mightypork.gamecore.util.math.Calc;
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public class Sides {
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public static final byte MASK_NW = (byte) 0b10000000;
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public static final byte MASK_N = (byte) 0b01000000;
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public static final byte MASK_NE = (byte) 0b00100000;
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public static final byte MASK_E = (byte) 0b00010000;
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public static final byte MASK_SE = (byte) 0b00001000;
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public static final byte MASK_S = (byte) 0b00000100;
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public static final byte MASK_SW = (byte) 0b00000010;
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public static final byte MASK_W = (byte) 0b00000001;
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public static final byte MASK_CARDINAL = MASK_N | MASK_S | MASK_E | MASK_W;
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public static final byte MASK_DIAGONAL = MASK_NE | MASK_NW | MASK_SE | MASK_SW;
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public static final byte NW_CORNER = MASK_W | MASK_NW | MASK_N;
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public static final byte NE_CORNER = MASK_E | MASK_NE | MASK_N;
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public static final byte SW_CORNER = MASK_W | MASK_SW | MASK_S;
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public static final byte SE_CORNER = MASK_E | MASK_SE | MASK_S;
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public static final Step NW = Step.make(-1, -1);
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public static final Step N = Step.make(0, -1);
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public static final Step NE = Step.make(1, -1);
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public static final Step E = Step.make(1, 0);
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public static final Step SE = Step.make(1, 1);
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public static final Step S = Step.make(0, 1);
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public static final Step SW = Step.make(-1, 1);
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public static final Step W = Step.make(-1, 0);
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//@formatter:off
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/** All sides, in the order of bits. */
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public final static Step[] ALL_SIDES = {
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NW,
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N,
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NE,
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E,
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SE,
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S,
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SW,
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W
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};
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public final static Step[] CARDINAL_SIDES = {
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N,
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E,
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S,
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W
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};
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//@formatter:on
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/**
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* Get element from all sides
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*
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* @param i side index
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* @return the side coord
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*/
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public static Step get(int i)
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{
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return ALL_SIDES[i];
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}
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public static byte bit(int i)
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{
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return (byte) (1 << (7 - i));
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}
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public static Step randomCardinal()
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{
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return CARDINAL_SIDES[Calc.randInt(0, 3)];
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}
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}
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