v3.9.0 add fbx preserveMeshInstances

editor/i18n/en/assets.js

@@ -415,6 +415,15 @@ module.exports = {
                     'If one is not preferred, or one is invalid for use, the time range is robustly calculated.<br>' +
                     'Some FBX generators may not export this information.',
             },
+            preserveMeshInstances: {
+                name: 'Preserve Mesh Instances',
+                title:
+                    'In the FBX model, if a mesh is referenced by multiple nodes (aka, mesh instancing), whether to create only one mesh asset. <br>' +
+                    'If not, each reference will create a mesh asset copy.<br>' +
+                    'This option is by default unchecked but is checked for those models migrated from version prior to V3.9.0,<br>' +
+                    'since in previous versions the instances are always not preserved. <br>' +
+                    'This option is read-only here. To modify this option for special purpose, see manual docs.',
+            },
             smartMaterialEnabled: {
                 name: 'Smart Material Conversion',
                 title: 'Convert DCC materials to engine builtin materials which match the internal lighting model.',

editor/i18n/zh/assets.js

@@ -423,6 +423,10 @@ module.exports = {
                 name: '优先使用文件时间范围',
                 title: '在导出 FBX 动画时，是否优先使用 FBX 文件中记录的动画时间范围。<br>若不使用该时间范围或此范围不可能用，则会粗略地计算动画时间范围。有些 FBX 生产工具中可能并未导出该信息。',
             },
+            preserveMeshInstances: {
+                name: '保留网格实例',
+                title: 'FBX 模型中，若网格被多个节点引用（亦称网格实例化），是否仅创建一份网格资产。<br>若否，每处引用都将创建一份网格资产副本。<br>此选项默认勾选，但那些从 v3.9.0 之前的版本迁移上来的模型会自动不勾选，因为之前版本总是不保留网格实例的。<br>此选项在此处仅可读取，若要进行修改，见文档手册。',
+            },
             smartMaterialEnabled: {
                 name: '材质智能转换',
                 title: '将 DCC 材质转化为引擎材质, 并匹对 DCC 材质的光照模型',

editor/inspector/assets/fbx/fbx.js

@@ -14,6 +14,10 @@ exports.template = /* html */`
             <option value="60">60</option>
         </ui-select>
     </ui-prop>
+    <ui-prop readonly>
+        <ui-label slot="label" value="i18n:ENGINE.assets.fbx.preserveMeshInstances.name" tooltip="i18n:ENGINE.assets.fbx.preserveMeshInstances.title"></ui-label>
+        <ui-checkbox slot="content" class="preserveMeshInstances-checkbox"></ui-checkbox>
+    </ui-prop>
     <ui-prop>
         <ui-label slot="label" value="i18n:ENGINE.assets.fbx.preferLocalTimeSpan.name" tooltip="i18n:ENGINE.assets.fbx.preferLocalTimeSpan.title"></ui-label>
         <ui-checkbox slot="content" class="preferLocalTimeSpan-checkbox"></ui-checkbox>
@@ -69,6 +73,7 @@ exports.$ = {
     legacyFbxImporterCheckbox: '.legacyFbxImporter-checkbox',
     animationBakeRateSelect: '.animationBakeRate-select',
     preferLocalTimeSpanCheckbox: '.preferLocalTimeSpan-checkbox',
+    preserveMeshInstancesCheckbox: '.preserveMeshInstances-checkbox',
     smartMaterialEnabledCheckbox: '.smartMaterialEnabled-checkbox',
     smartMaterialEnabledProp: '.smart-material-prop',
 };
@@ -134,6 +139,20 @@ const Elements = {
             updateElementReadonly.call(panel, panel.$.animationBakeRateSelect);
         },
     },
+    preserveMeshInstances: {
+        update() {
+            const panel = this;
+
+            let defaultValue = true;
+            if (panel.meta.userData.fbx) {
+                defaultValue = getPropValue.call(panel, panel.meta.userData.fbx.preserveMeshInstances, defaultValue);
+            }
+
+            panel.$.preserveMeshInstancesCheckbox.value = defaultValue;
+
+            updateElementInvalid.call(panel, panel.$.preserveMeshInstancesCheckbox, 'fbx.preserveMeshInstances');
+        },
+    },
     preferLocalTimeSpan: {
         ready() {
             const panel = this;