78 lines
1.7 KiB
Plaintext
78 lines
1.7 KiB
Plaintext
// tilemap
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function tilemap()
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{
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this.tiles = [];
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this.offset_x = 0;
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this.offset_y = 0;
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this.size_x = 32;
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this.size_y = 32;
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return this;
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}
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tilemap.for = function (map, fn) {
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for (var x = 0; x < map.tiles.length; x++) {
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if (!map.tiles[x]) continue;
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for (var y = 0; y < map.tiles[x].length; y++) {
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if (map.tiles[x][y] !== undefined) {
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var result = fn(map.tiles[x][y], {
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x: x + map.offset_x,
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y: y + map.offset_y
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});
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if (result !== undefined) {
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map.tiles[x][y] = result;
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}
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}
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}
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}
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}
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tilemap.prototype =
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{
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at(pos) {
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var x = pos.x - this.offset_x;
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var y = pos.y - this.offset_y;
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if (!this.tiles[x]) return undefined;
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return this.tiles[x][y];
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},
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set(pos, image) {
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// Shift arrays if negative indices
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if (pos.x < this.offset_x) {
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var shift = this.offset_x - pos.x;
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var new_tiles = [];
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for (var i = 0; i < shift; i++) new_tiles[i] = [];
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this.tiles = new_tiles.concat(this.tiles);
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this.offset_x = pos.x;
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}
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if (pos.y < this.offset_y) {
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var shift = this.offset_y - pos.y;
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for (var i = 0; i < this.tiles.length; i++) {
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if (!this.tiles[i]) this.tiles[i] = [];
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var new_col = [];
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for (var j = 0; j < shift; j++) new_col[j] = undefined;
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this.tiles[i] = new_col.concat(this.tiles[i]);
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}
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this.offset_y = pos.y;
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}
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var x = pos.x - this.offset_x;
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var y = pos.y - this.offset_y;
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// Ensure array exists up to x
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while (this.tiles.length <= x) this.tiles.push([]);
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// Set the value
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this.tiles[x][y] = image;
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},
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draw() {
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return {
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cmd:'tilemap',
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tilemap:this
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}
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},
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}
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return tilemap |