mirror of
https://github.com/photonstorm/phaser
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92 lines
3.9 KiB
JavaScript
92 lines
3.9 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2020 Photon Storm Ltd.
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* @license {@link https://opensource.org/licenses/MIT|MIT License}
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*/
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var Geom = require('../../geom/');
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var GetTilesWithin = require('./GetTilesWithin');
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var Intersects = require('../../geom/intersects/');
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var NOOP = require('../../utils/NOOP');
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var TileToWorldXY = require('./TileToWorldXY');
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var WorldToTileXY = require('./WorldToTileXY');
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var TriangleToRectangle = function (triangle, rect)
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{
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return Intersects.RectangleToTriangle(rect, triangle);
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};
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// Note: Could possibly be optimized by copying the shape and shifting it into tilemapLayer
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// coordinates instead of shifting the tiles.
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/**
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* Gets the tiles that overlap with the given shape in the given layer. The shape must be a Circle,
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* Line, Rectangle or Triangle. The shape should be in world coordinates.
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*
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* @function Phaser.Tilemaps.Components.GetTilesWithinShape
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* @private
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* @since 3.0.0
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*
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* @param {(Phaser.Geom.Circle|Phaser.Geom.Line|Phaser.Geom.Rectangle|Phaser.Geom.Triangle)} shape - A shape in world (pixel) coordinates
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* @param {object} [filteringOptions] - Optional filters to apply when getting the tiles.
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* @param {boolean} [filteringOptions.isNotEmpty=false] - If true, only return tiles that don't have -1 for an index.
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* @param {boolean} [filteringOptions.isColliding=false] - If true, only return tiles that collide on at least one side.
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* @param {boolean} [filteringOptions.hasInterestingFace=false] - If true, only return tiles that have at least one interesting face.
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* @param {Phaser.Cameras.Scene2D.Camera} [camera=main camera] - The Camera to use when calculating the tile index from the world values.
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* @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
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*
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* @return {Phaser.Tilemaps.Tile[]} Array of Tile objects.
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*/
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var GetTilesWithinShape = function (shape, filteringOptions, camera, layer)
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{
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if (shape === undefined) { return []; }
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// intersectTest is a function with parameters: shape, rect
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var intersectTest = NOOP;
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if (shape instanceof Geom.Circle) { intersectTest = Intersects.CircleToRectangle; }
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else if (shape instanceof Geom.Rectangle) { intersectTest = Intersects.RectangleToRectangle; }
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else if (shape instanceof Geom.Triangle) { intersectTest = TriangleToRectangle; }
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else if (shape instanceof Geom.Line) { intersectTest = Intersects.LineToRectangle; }
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// Top left corner of the shapes's bounding box, rounded down to include partial tiles
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var pointStart = WorldToTileXY(shape.left, shape.top, true, undefined, camera, layer);
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var xStart = pointStart.x;
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var yStart = pointStart.y;
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// Bottom right corner of the shapes's bounding box, rounded up to include partial tiles
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var pointEnd = WorldToTileXY(shape.right, shape.bottom, true, undefined, camera, layer);
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var xEnd = Math.ceil(pointEnd.x);
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var yEnd = Math.ceil(pointEnd.y);
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// Tiles within bounding rectangle of shape. Bounds are forced to be at least 1 x 1 tile in size
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// to grab tiles for shapes that don't have a height or width (e.g. a horizontal line).
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var width = Math.max(xEnd - xStart, 1);
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var height = Math.max(yEnd - yStart, 1);
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var tiles = GetTilesWithin(xStart, yStart, width, height, filteringOptions, layer);
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var tileWidth = layer.tileWidth;
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var tileHeight = layer.tileHeight;
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if (layer.tilemapLayer)
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{
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tileWidth *= layer.tilemapLayer.scaleX;
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tileHeight *= layer.tilemapLayer.scaleY;
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}
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var results = [];
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var tileRect = new Geom.Rectangle(0, 0, tileWidth, tileHeight);
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for (var i = 0; i < tiles.length; i++)
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{
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var tile = tiles[i];
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var point = TileToWorldXY(tile.x, tile.y, undefined, camera, layer);
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tileRect.x = point.x;
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tileRect.y = point.y;
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if (intersectTest(shape, tileRect))
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{
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results.push(tile);
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}
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}
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return results;
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};
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module.exports = GetTilesWithinShape;
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