131 lines
2.9 KiB
JavaScript
131 lines
2.9 KiB
JavaScript
import * as I from 'immutable';
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import {compose, EventEmitter} from '@avocado/core';
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import {Rectangle, Vector} from '@avocado/math';
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import {Synchronized} from '@avocado/state';
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import {TileUpdatePacket} from './packets/tile-update.packet';
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const decorate = compose(
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EventEmitter,
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Vector.Mixin('size', 'width', 'height', {
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default: [0, 0],
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}),
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Synchronized,
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);
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export class Tiles extends decorate(class {}) {
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constructor(json) {
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super();
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this.data = [];
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this.updatePackets = [];
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if ('undefined' !== typeof json) {
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this.fromJSON(json);
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}
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}
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acceptPacket(packet) {
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if (packet instanceof TileUpdatePacket) {
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const unpackedPosition = [
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packet.data.position & 0xFFFF,
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packet.data.position >> 16,
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];
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this.setTileAt(unpackedPosition, packet.data.tile);
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}
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}
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forEachTile(fn) {
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let [x, y] = [0, 0];
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let [width, height] = this.size;
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let i = 0;
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for (let k = 0; k < height; ++k) {
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for (let j = 0; j < width; ++j) {
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fn(this.data[i], x, y, i);
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++i;
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++x;
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}
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x = 0;
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++y;
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}
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}
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fromJSON(json) {
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if (json.size) {
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this.size = json.size;
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}
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if (json.data) {
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this.data = json.data.slice(0);
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}
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return this;
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}
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packetsForUpdate() {
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const packetsForUpdate = this.updatePackets;
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this.updatePackets = [];
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return packetsForUpdate;
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}
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get rectangle() {
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return Rectangle.compose([0, 0], this.size);
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}
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setTileAt(position, tile) {
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const oldTile = this.tileAt(position);
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if (oldTile === tile) {
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return;
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}
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const index = position[1] * this.width + position[0];
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if (index < 0 || index >= this.data.length) {
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return;
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}
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this.data[index] = tile;
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const packedPosition = position[1] << 16 | position[0];
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this.updatePackets.push(new TileUpdatePacket({
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position: packedPosition,
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tile,
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}));
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this.emit('dataChanged');
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}
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slice(rectangle) {
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const tilesRectangle = this.rectangle;
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// Get intersection.
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if (!Rectangle.intersects(rectangle, tilesRectangle)) {
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return [];
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}
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let [x, y, sliceWidth, sliceHeight] = Rectangle.intersection(
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rectangle,
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tilesRectangle,
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);
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// No muls in the loop.
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let sliceRow = y * sliceWidth;
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const dataWidth = this.width;
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let dataRow = y * dataWidth;
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// Copy slice.
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const slice = new Array(sliceWidth * sliceHeight);
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for (let j = 0; j < sliceHeight; ++j) {
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for (let i = 0; i < sliceWidth; ++i) {
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slice[sliceRow + x] = this.data[dataRow + x];
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x++;
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}
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sliceRow += sliceWidth;
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dataRow += dataWidth;
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x -= sliceWidth;
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}
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return slice;
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}
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tileAt(position) {
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return this.data[position[1] * this.width + position[0]];
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}
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toJSON() {
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return {
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size: Vector.copy(this.size),
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data: this.data.slice(0),
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};
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}
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}
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