fix: fix outdated tile cache of vt layer, close maptalks/issues#937 (#2816)

Author: fuzhenn

packages/vt/src/layer/plugins/PainterPlugin.js

@@ -135,13 +135,19 @@ function createPainterPlugin(type, Painter) {
                 }
             }
 
-            let meshes = this._getMesh(key);
+            let meshes = tileCache.meshes;
             if (!meshes) {
                 const { meshes: newMeshes, retire: isRetire } = this._createMeshes(geometries, context);
                 if (!retire) {
                     retire = isRetire;
                 }
                 meshes = newMeshes;
+                const oldMeshes = this._getMesh(key);
+                if (oldMeshes) {
+                    painter.deleteMesh(oldMeshes, true);
+                }
+                tileCache.meshes = meshes;
+                this._meshCache[key] = meshes;
             }
             return { retire };
         },
@@ -170,8 +176,6 @@ function createPainterPlugin(type, Painter) {
                 if (sceneConfig.animation) {
                     meshes._animationTime = context.timestamp;
                 }
-                const key = this._getMeshKey(context);
-                this._meshCache[key] = meshes;
             }
             return { meshes, retire };
         },

packages/vt/src/layer/renderer/VectorTileLayerRenderer.js

@@ -1403,6 +1403,7 @@ class VectorTileLayerRenderer extends CanvasCompatible(TileLayerRendererable(Lay
             const skinImage = skinImages[i];
             const texture = skinImage.texture;
             this._parentContext = {
+                tile: skinImage.tile,
                 terrainMaskFBO: skinImage.terrainMaskFBO,
                 renderTarget: {
                     fbo: texture

packages/vt/src/worker/layer/GeojsonLayerWorker.js

@@ -47,6 +47,7 @@ export default class GeoJSONLayerWorker extends BaseLayerWorker {
             cb();
             return;
         }
+        this.empty = false;
         const options = {
             maxZoom: 24,  // max zoom to preserve detail on; can't be higher than 24
             tolerance: this.options.simplifyTolerance, // simplification tolerance (higher means simpler)