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A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers.
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<h1 class="page-title">Source: tilemap/Tileset.js</h1>
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<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* A Tile set is a combination of an image containing the tiles and collision data per tile.
* You should not normally instantiate this class directly.
*
* @class Phaser.Tileset
* @constructor
* @param {string} name - The name of the tileset in the map data.
* @param {number} firstgid - The Tiled firstgid value. In non-Tiled data this should be considered the starting index value of the first tile in this set.
* @param {number} [width=32] - Width of each tile in pixels.
* @param {number} [height=32] - Height of each tile in pixels.
* @param {number} [margin=0] - The amount of margin around the tilesheet.
* @param {number} [spacing=0] - The amount of spacing between each tile in the sheet.
* @param {object} [properties] - Tileset properties.
*/
Phaser.Tileset = function (name, firstgid, width, height, margin, spacing, properties) {
if (typeof width === 'undefined' || width <= 0) { width = 32; }
if (typeof height === 'undefined' || height <= 0) { height = 32; }
if (typeof margin === 'undefined') { margin = 0; }
if (typeof spacing === 'undefined') { spacing = 0; }
/**
* @property {string} name - The name of the Tileset.
*/
this.name = name;
/**
* @property {number} firstgid - The Tiled firstgid value. In non-Tiled data this should be considered the starting index value of the first tile in this set.
*/
this.firstgid = firstgid;
/**
* @property {number} tileWidth - The width of a tile in pixels.
*/
this.tileWidth = width;
/**
* @property {number} tileHeight - The height of a tile in pixels.
*/
this.tileHeight = height;
/**
* @property {number} tileMargin - The margin around the tiles in the tileset.
*/
this.tileMargin = margin;
/**
* @property {number} tileSpacing - The spacing in pixels between each tile in the tileset.
*/
this.tileSpacing = spacing;
/**
* @property {object} properties - Tileset specific properties (typically defined in the Tiled editor).
*/
this.properties = properties;
/**
* @property {object} image - The image used for rendering. This is a reference to the image stored in Phaser.Cache.
*/
this.image = null;
/**
* @property {number} rows - The number of rows in the tile sheet.
*/
this.rows = 0;
/**
* @property {number} columns - The number of columns in the tile sheet.
*/
this.columns = 0;
/**
* @property {number} total - The total number of tiles in the tilesheet.
*/
this.total = 0;
/**
* @property {array} draw - The tile drawImage look-up table
* @private
*/
this.drawCoords = [];
};
Phaser.Tileset.prototype = {
/**
* Draws a tile from this Tileset at the given coordinates on the context.
*
* @method Phaser.Tileset#draw
* @param {HTMLCanvasContext} context - The context to draw the tile onto.
* @param {number} x - The x coordinate to draw to.
* @param {number} y - The y coordinate to draw to.
* @param {number} index - The index of the tile within the set to draw.
*/
draw: function (context, x, y, index) {
if (!this.image || !this.drawCoords[index])
{
return;
}
context.drawImage(
this.image,
this.drawCoords[index][0],
this.drawCoords[index][1],
this.tileWidth,
this.tileHeight,
x,
y,
this.tileWidth,
this.tileHeight
);
},
/**
* Adds a reference from this Tileset to an Image stored in the Phaser.Cache.
*
* @method Phaser.Tileset#setImage
* @param {Image} image - The image this tileset will use to draw with.
*/
setImage: function (image) {
this.image = image;
this.rows = Math.round((image.height - this.tileMargin) / (this.tileHeight + this.tileSpacing));
this.columns = Math.round((image.width - this.tileMargin) / (this.tileWidth + this.tileSpacing));
this.total = this.rows * this.columns;
// Create the index look-up
this.drawCoords.length = 0;
var tx = this.tileMargin;
var ty = this.tileMargin;
var i = this.firstgid;
for (var y = 0; y < this.rows; y++)
{
for (var x = 0; x < this.columns; x++)
{
this.drawCoords[i] = [ tx, ty ];
tx += this.tileWidth + this.tileSpacing;
i++;
}
tx = this.tileMargin;
ty += this.tileHeight + this.tileSpacing;
}
},
/**
* Sets tile spacing and margins.
*
* @method Phaser.Tileset#setSpacing
* @param {number} [tileMargin] - The margin around the tiles in the sheet.
* @param {number} [tileSpacing] - The spacing between the tiles in the sheet.
*/
setSpacing: function (margin, spacing) {
this.tileMargin = margin;
this.tileSpacing = spacing;
this.setImage(this.image);
}
};
Phaser.Tileset.prototype.constructor = Phaser.Tileset;
</pre>
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