形态键预热

examples/3d/babylonAdapter.js

@@ -6,6 +6,7 @@ class BabylonMorphTargetAdapter {
 
     buildCache(meshes) {
         this.morphTargetCache = {};
+        this.meshes = meshes;
         let totalTargets = 0;
 
         meshes.forEach(mesh => {
@@ -30,6 +31,44 @@ class BabylonMorphTargetAdapter {
         return totalTargets;
     }
 
+    warmupShaders(scene) {
+        console.log('开始shader预热...');
+        const startTime = performance.now();
+
+        // 预热：强制触发着色器编译
+        // 使用多种值组合来触发所有可能的shader变体
+        const testValues = [0, 0.2, 0.4, 0.6, 0.8, 1.0];
+
+        for (let pass = 0; pass < testValues.length; pass++) {
+            const value = testValues[pass];
+            for (const targets of Object.values(this.morphTargetCache)) {
+                targets.forEach(mt => {
+                    mt.influence = value;
+                });
+            }
+
+            // 每次设置后都渲染,确保shader编译
+            if (scene) {
+                scene.render();
+            }
+        }
+
+        // 重置所有影响值
+        for (const targets of Object.values(this.morphTargetCache)) {
+            targets.forEach(mt => {
+                mt.influence = 0;
+            });
+        }
+
+        // 最后渲染一次确保重置生效
+        if (scene) {
+            scene.render();
+        }
+
+        const elapsed = performance.now() - startTime;
+        console.log(`shader预热完成,耗时 ${elapsed.toFixed(2)}ms`);
+    }
+
     setInfluence(name, value) {
         const lowerName = name.toLowerCase();
         const targets = this.morphTargetCache[lowerName];