tile.id instead of tile.dupKey fix #255

Author: deyihu

src/BaseVectorTileLayer.js

@@ -91,9 +91,9 @@ class BaseVectorTileLayer extends maptalks.TileLayer {
             const d = tileGrids[i];
             const tiles = d.tiles || [];
             for (let j = 0, len1 = tiles.length; j < len1; j++) {
-                const { dupKey } = tiles[j];
-                keys.push(dupKey);
-                keysMap[dupKey] = true;
+                const { id } = tiles[j];
+                keys.push(id);
+                keysMap[id] = true;
             }
 
         }

src/TerrainVectorTileLayer.js

@@ -117,7 +117,7 @@ class TerrainVectorTileLayer extends BaseVectorTileLayer {
                 tileImage.height = tileSize['height'];
                 tileImage.onload = this.onTileLoad.bind(this, tileImage, tile);
                 tileImage.onerror = this.onTileError.bind(this, tileImage, tile);
-                this.loadTileImage(tileImage, tile['url'], tile.dupKey);
+                this.loadTileImage(tileImage, tile['url'], tile.id);
                 return tileImage;
             };
 
@@ -128,12 +128,12 @@ class TerrainVectorTileLayer extends BaseVectorTileLayer {
                 tile.image.onload = null;
                 tile.image.onerror = null;
                 const tileinfo = tile.info || {};
-                const rgbImage = this._imgQueue[tileinfo.dupKey];
+                const rgbImage = this._imgQueue[tileinfo.id];
                 if (rgbImage) {
                     rgbImage.src = '';
                     rgbImage.onload = null;
                     rgbImage.onerror = null;
-                    delete this._imgQueue[tileinfo.dupKey];
+                    delete this._imgQueue[tileinfo.id];
                 }
             };
             e.renderer.loadTileImage = (img, url, key) => {

src/ThreeVectorTileLayer.js

@@ -149,7 +149,7 @@ class ThreeVectorTileLayer extends BaseVectorTileLayer {
                 tileImage.height = tileSize['height'];
                 tileImage.onload = this.onTileLoad.bind(this, tileImage, tile);
                 tileImage.onerror = this.onTileError.bind(this, tileImage, tile);
-                this.loadTileImage(tileImage, tile['url'], tile.dupKey);
+                this.loadTileImage(tileImage, tile['url'], tile.id);
                 return tileImage;
             };
 
@@ -160,7 +160,7 @@ class ThreeVectorTileLayer extends BaseVectorTileLayer {
                 tile.image.onload = null;
                 tile.image.onerror = null;
                 const tileinfo = tile.info || {};
-                outQueue(tileinfo.dupKey);
+                outQueue(tileinfo.id);
             };
 
             e.renderer.loadTileImage = (img, url, key) => {