更换新的植被生成系统

src/OceanScene.js

@@ -20,6 +20,7 @@ export class OceanScene {
         this.sun = new THREE.Vector3();
         this.terrain = null;
         this.vegetation = null;
+        this.vegetationSystem = null;
         this.pmremGenerator = null;
         this.renderTarget = null;
         this.sunLight = null;
@@ -304,13 +305,15 @@ export class OceanScene {
     
     async initVegetation() {
         const vegSystem = new VegetationSystem(this.terrainGenerator, {
-            grassCount: 30000,
-            treeCount: 300,
-            terrainSize: 1200,
-            waterLevel: 1
+            grassCount: 140000, // 草簇数量，越大地表覆盖越密
+            shrubCount: 12, // 灌木和低矮植物数量
+            treeCount: 9, // 树木数量
+            terrainSize: 1200, // 植被允许分布的地形范围
+            waterLevel: 1 // 植被生成时参考的水位，避免贴近海边
         });
         
         this.vegetation = vegSystem.generate();
+        this.vegetationSystem = vegSystem;
         vegSystem.addToScene(this.scene);
     }
     
@@ -480,6 +483,10 @@ export class OceanScene {
                 layer.texture.offset.y = time * layer.speedY;
             });
         }
+
+        if (this.vegetationSystem) {
+            this.vegetationSystem.update(time);
+        }
         
         this.controls.update();
         if (this.composer) {