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74 lines
2.7 KiB
74 lines
2.7 KiB
export class TileHandler{
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static isTileVisible(tile){
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const currentToken = CONFIG.Levels.currentToken;
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CONFIG.Levels.FoWHandler.lazyCreateTileFogMask(tile);
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if(!currentToken) return true;
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const tokenElevation = currentToken.document.elevation;
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const tokenLOS = currentToken.losHeight;
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const bgElevation = canvas?.scene?.flags?.levels?.backgroundElevation ?? 0;
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//Handle background tiles
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if(!tile.document.overhead){
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return tokenLOS >= bgElevation
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}
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if(!tile.document.flags.levels) return true;
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const {rangeTop, rangeBottom, showIfAbove, showAboveRange, isBasement, noFogHide} = getFlags(tile.document)
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//Not a levels tile, hide if token is under background
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if(rangeTop === Infinity && rangeBottom === -Infinity || !tile.document.overhead) return tokenLOS >= bgElevation;
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const inRange = tokenLOS < rangeTop && tokenLOS >= rangeBottom;
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//If tile is basement and token is out of it's range, it's not visible
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if(!inRange && isBasement) return false;
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//Non roof tiles under the token that don't have the show if above will be hidden
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if( tokenLOS < rangeBottom && !showIfAbove && rangeTop !== Infinity) return false;
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//Tiles set as show above will be hidden if the token exceeds the range
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if( tokenLOS < rangeBottom && showIfAbove && Math.abs(tokenElevation - rangeBottom) > showAboveRange) return false;
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//If it's a roof or show if above is enabled and the bottom of the tile is higher than the bg, and the token is under the bg, hide the tile
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if((showIfAbove || rangeTop === Infinity) && rangeBottom > bgElevation && tokenLOS < bgElevation) return false;
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return true;
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}
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static _identifyOccludedTiles(tokens) {
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const occluded = new Set();
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const controlled = tokens.filter(t => t.controlled);
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for ( const token of (controlled.length ? controlled : tokens) ) {
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const tiles = canvas.tiles.quadtree.getObjects(token.bounds);
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for ( const tile of tiles ) {
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if ( occluded.has(tile) ) continue; // Don't bother re-testing a tile
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if ( tile.testOcclusion(token, {corners: tile.isRoof}) ) occluded.add(tile);
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}
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}
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return occluded;
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}
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}
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function getFlags(document){
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const flags = {}
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for( const [k,v] of Object.entries(document.flags.levels)){
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flags[k] = v ?? defaultValues[k];
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}
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return flags;
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}
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const defaultValues = {
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rangeTop: Infinity,
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rangeBottom: -Infinity,
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showIfAbove: false,
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showAboveRange: Infinity,
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isBasement: false,
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noFogHide: false,
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excludeFromChecker: false
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}
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