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Use a cached vector to save constant allocation and fixed y culling limit

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This commit is contained in:
Richard Davey 2020-10-11 23:03:52 +01:00
parent 2e50061699
commit 39f74d2e95
1 changed files with 9 additions and 5 deletions
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14
src/tilemaps/components/CheckIsoBounds.js
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@ -4,6 +4,10 @@
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var Vector2 = require('../../math/Vector2');
var point = new Vector2();
/**
* Checks if the given tile coordinate is within the isometric layer bounds, or not.
*
@ -21,13 +25,13 @@ var CheckIsoBounds = function (tileX, tileY, layer, camera)
{
var tilemapLayer = layer.tilemapLayer;
var cullDistances = tilemapLayer.isoCullDistances;
var pos = tilemapLayer.tileToWorldXY(tileX,tileY,undefined,camera);
var pos = tilemapLayer.tilemap.tileToWorldXY(tileX, tileY, point, camera, tilemapLayer);
// we always subtract 1/2 of the tile's height/width to make the culling distance start from the center of the tiles.
return pos.x > camera.worldView.x + tilemapLayer.scaleX * layer.tileWidth * (- cullDistances.x - 1 / 2)
&& pos.x < camera.worldView.right + tilemapLayer.scaleX * layer.tileWidth * (cullDistances.x - 1 / 2)
&& pos.y > camera.worldView.y + tilemapLayer.scaleY * layer.tileHeight * (- cullDistances.y - 1 / 2)
&& pos.y < camera.worldView.bottom + tilemapLayer.scaleY * layer.tileHeight * (cullDistances.y - 1 / 2);
return pos.x > camera.worldView.x + tilemapLayer.scaleX * layer.tileWidth * (-cullDistances.x - 0.5)
&& pos.x < camera.worldView.right + tilemapLayer.scaleX * layer.tileWidth * (cullDistances.x - 0.5)
&& pos.y > camera.worldView.y + tilemapLayer.scaleY * layer.tileHeight * (-cullDistances.y - 1.0)
&& pos.y < camera.worldView.bottom + tilemapLayer.scaleY * layer.tileHeight * (cullDistances.y - 0.5);
};
module.exports = CheckIsoBounds;