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The fix from https://github.com/photonstorm/phaser/pull/3354/ leads to some tiles getting culled when camera is zoomed as the camera.scrollX/camera.scrollY-Properties are needed in unscaled Coordinates (World-Coordinates?) in CullTile.js Error gets bigger with distance from (0|0)
62 lines
2 KiB
JavaScript
62 lines
2 KiB
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2018 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* Returns the tiles in the given layer that are within the camera's viewport. This is used
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* internally.
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*
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* @function Phaser.Tilemaps.Components.CullTiles
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* @since 3.0.0
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*
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* @param {Phaser.Tilemaps.LayerData} layer - The Tilemap Layer to act upon.
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* @param {Phaser.Cameras.Scene2D.Camera} [camera] - The Camera to run the cull check against.
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* @param {array} [outputArray] - [description]
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*
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* @return {Phaser.Tilemaps.Tile[]} An array of Tile objects.
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*/
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var CullTiles = function (layer, camera, outputArray)
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{
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if (outputArray === undefined) { outputArray = []; }
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outputArray.length = 0;
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var tilemapLayer = layer.tilemapLayer;
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var mapData = layer.data;
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var mapWidth = layer.width;
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var mapHeight = layer.height;
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var left = (camera.scrollX * camera.zoom * tilemapLayer.scrollFactorX) - tilemapLayer.x;
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var top = (camera.scrollY * camera.zoom * tilemapLayer.scrollFactorY) - tilemapLayer.y;
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var sx = tilemapLayer.scaleX;
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var sy = tilemapLayer.scaleY;
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var tileWidth = layer.tileWidth * sx;
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var tileHeight = layer.tileHeight * sy;
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for (var row = 0; row < mapHeight; ++row)
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{
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for (var col = 0; col < mapWidth; ++col)
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{
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var tile = mapData[row][col];
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if (tile === null || tile.index === -1) { continue; }
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var tileX = tile.pixelX * sx - left;
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var tileY = tile.pixelY * sy - top;
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var cullW = camera.width + tileWidth;
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var cullH = camera.height + tileHeight;
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if (tile.visible &&
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tileX > -tileWidth && tileY > -tileHeight &&
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tileX < cullW && tileY < cullH)
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{
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outputArray.push(tile);
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}
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}
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}
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return outputArray;
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};
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module.exports = CullTiles;
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