89 lines
4.1 KiB
JavaScript
Executable File
89 lines
4.1 KiB
JavaScript
Executable File
import { Direction } from "./WfcConstants.js";
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/**
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* Represents a 3x3 grid of values (sub-cells), that are used as building blocks for procedurally
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* generated grids. In reality, only the center value will be included in the outputted WfcGrid;
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* the 8 surrounding colors are there to establish which TrainingCells can live next to each other.
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*/
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export class TrainingCell {
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/** @param {Uint8Array} values The 9 sub cells that make up this TrainingCell */
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constructor() {
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this.values = new Uint8Array(9);
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}
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/** @returns {string} The actual value of this Trainin gCell is represented by its center value */
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get value() {
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return this.values[Direction.C];
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}
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/**
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* @param {TrainingCell} other
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* @param {number} direction
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*
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* @returns {boolean}
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*/
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potentialNeighbours(other, direction) {
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// sadly, we're not allowed to be friends with ourselves.
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if (this === other) {
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console.log("WTF were checking to be friends with ourselves!", this, other, direction);
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return false;
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}
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return (
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//
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// if they want to live to my east,
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// their two westmost columns must match
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// my two eastmost columns
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(direction == Direction.E &&
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// My center col must match their west col
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this.values[Direction.N] === other.values[Direction.NW] &&
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this.values[Direction.C] === other.values[Direction.W] &&
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this.values[Direction.S] === other.values[Direction.SW] &&
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// My east col must match their center col
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this.values[Direction.NE] === other.values[Direction.N] &&
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this.values[Direction.E] === other.values[Direction.C] &&
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this.values[Direction.SE] === other.values[Direction.S]) ||
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//
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// if they want to live to my west,
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// their two eastmost columns must match
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// my two westmost columns
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(direction == Direction.W &&
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// My center col must match their east col
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this.values[Direction.N] === other.values[Direction.NE] &&
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this.values[Direction.C] === other.values[Direction.E] &&
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this.values[Direction.S] === other.values[Direction.SE] &&
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// My west col must match their center col
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this.values[Direction.NW] === other.values[Direction.N] &&
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this.values[Direction.W] === other.values[Direction.C] &&
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this.values[Direction.SW] === other.values[Direction.S]) ||
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//
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// if they want to live to my north,
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// their two souther rows must match
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// my two northern rows
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(direction == Direction.N &&
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// my middle row must match their south row
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this.values[Direction.W] === other.values[Direction.SW] &&
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this.values[Direction.C] === other.values[Direction.S] &&
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this.values[Direction.E] === other.values[Direction.SE] &&
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// my north row must match their middle row
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this.values[Direction.NW] === other.values[Direction.W] &&
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this.values[Direction.N] === other.values[Direction.C] &&
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this.values[Direction.Direction.NE] === other.values[Direction.E]) ||
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//
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// if they want to live to my south,
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// their two northern rows must match
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// my two southern rows
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(direction == Direction.S &&
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// my middle row must match their north row
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this.values[Direction.W] === other.values[Direction.NW] &&
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this.values[Direction.C] === other.values[Direction.N] &&
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this.values[Direction.E] === other.values[Direction.SE] &&
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// my south row must match their middle row
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this.values[Direction.SW] === other.values[Direction.W] &&
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this.values[Direction.S] === other.values[Direction.C] &&
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this.values[Direction.SE] === other.values[Direction.E])
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);
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}
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}
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