优化，增加表情幅度

examples/3d/blendshapeAnimator.js

@@ -36,7 +36,8 @@ class BlendShapeAnimator {
         this.expressionParams = config.expressionParams || {
             intervalMin: 3000,
             intervalMax: 8000,
-            speed: 400
+            speed: 400,
+            strength: 1.0
         };
 
         this.enabledExpressions = new Set();
@@ -269,12 +270,20 @@ class BlendShapeAnimator {
 
     // 设置空闲动画
     setIdleAnimation(name, target, duration = 200, easing = 'easeOutQuad') {
+        const currentValue = this.morphTargetAdapter
+            ? this.morphTargetAdapter.getInfluence(name) || 0
+            : (this.idleAnimations[name]?.target || 0);
+
+        const anim = this.idleAnimations[name] || {};
+        const unchanged = Math.abs(currentValue - target) < 1e-4 && Math.abs((anim.target ?? 0) - target) < 1e-4;
+
         this.idleAnimations[name] = {
             target: target,
             duration: duration,
             easing: easing,
-            startTime: null,
-            startValue: this.idleAnimations[name]?.target || 0
+            // 如果目标基本不变，保持当前起点，避免反复重新插值导致抖动
+            startTime: unchanged ? performance.now() : null,
+            startValue: currentValue
         };
     }
 
@@ -305,7 +314,9 @@ class BlendShapeAnimator {
                 if (anim.target === 0) {
                     delete this.idleAnimations[name];
                 } else {
-                    anim.startTime = null;
+                    // 目标保持不变，锁定在当前值，避免反复重新插值造成抖动
+                    anim.startValue = anim.target;
+                    anim.startTime = now;
                 }
             }
         }

examples/3d/expressionLibrary.js

@@ -203,11 +203,11 @@ const ExpressionLibrary = {
 
             // 从主页面获取动画速度参数
             const speed = window.expressionParams?.speed || 400;
-
+            const strength = window.expressionParams?.strength ?? 1;
             // 应用表情
             for (const [name, value] of Object.entries(expression.blendShapes)) {
                 if (window.setIdleAnimation) {
-                    window.setIdleAnimation(name, value, speed, 'easeInOutCubic');
+                    window.setIdleAnimation(name, value * strength, speed, 'easeInOutCubic');
                 }
             }
 

examples/3d/index.html

@@ -142,11 +142,16 @@
                 </div>
                 <div class="param-item">
                     <label>频率间隔 (秒): <span class="param-value" id="expressionIntervalValue">1-1</span></label>
-                    <input type="range" id="expressionIntervalMin" min="1" max="8" step="0.5" value="1"
+                    <input type="range" id="expressionIntervalMin" min="0" max="8" step="0.5" value="1"
                            oninput="updateExpressionInterval()">
-                    <input type="range" id="expressionIntervalMax" min="1" max="15" step="0.5" value="1"
+                    <input type="range" id="expressionIntervalMax" min="0.5" max="15" step="0.5" value="1"
                            oninput="updateExpressionInterval()">
                 </div>
+                <div class="param-item">
+                    <label>表情幅度: <span class="param-value" id="expressionStrengthValue">1.3</span></label>
+                    <input type="range" id="expressionStrength" min="0" max="2" step="0.1" value="1.0"
+                           oninput="updateExpressionStrength(this.value)">
+                </div>
                 <div class="param-item">
                     <label>动画速度 (ms): <span class="param-value" id="expressionSpeedValue">400</span></label>
                     <input type="range" id="expressionSpeed" min="200" max="800" step="50" value="400"

examples/3d/main.js

@@ -395,6 +395,11 @@ function updateExpressionSpeed(value) {
     document.getElementById('expressionSpeedValue').textContent = value;
 }
 
+function updateExpressionStrength(value) {
+    animator.expressionParams.strength = parseFloat(value);
+    document.getElementById('expressionStrengthValue').textContent = value;
+}
+
 // 折叠/展开功能
 function toggleCollapse(event, paramGroupId) {
     event.preventDefault();