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Only render parts of source tile that are needed for the view tile

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This commit is contained in:
Andreas Hocevar
2017-10-08 19:41:46 +02:00
parent 742a71cd4b
commit dbeb3d2795
1 changed files with 5 additions and 1 deletions
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src/ol/renderer/canvas/vectortilelayer.js
+5 -1
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@@ -159,6 +159,8 @@ ol.renderer.canvas.VectorTileLayer.prototype.createReplayGroup_ = function(
var sourceTileCoord = sourceTile.tileCoord; var sourceTileCoord = sourceTile.tileCoord;
var sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord); var sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);
var sharedExtent = ol.extent.getIntersection(tileExtent, sourceTileExtent); var sharedExtent = ol.extent.getIntersection(tileExtent, sourceTileExtent);
var bufferedExtent = ol.extent.equals(sourceTileExtent, sharedExtent) ? null :
ol.extent.buffer(sharedExtent, layer.getRenderBuffer() * resolution);
var tileProjection = sourceTile.getProjection(); var tileProjection = sourceTile.getProjection();
var reproject = false; var reproject = false;
if (!ol.proj.equivalent(projection, tileProjection)) { if (!ol.proj.equivalent(projection, tileProjection)) {
@@ -210,7 +212,9 @@ ol.renderer.canvas.VectorTileLayer.prototype.createReplayGroup_ = function(
} }
feature.getGeometry().transform(tileProjection, projection); feature.getGeometry().transform(tileProjection, projection);
} }
renderFeature.call(this, feature); if (!bufferedExtent || ol.extent.intersects(bufferedExtent, feature.getExtent())) {
renderFeature.call(this, feature);
}
} }
replayGroup.finish(); replayGroup.finish();
sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup); sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);