Forge Viewer 原生小地圖展 Autodesk.AEC.Minimap3DExtension
對Autodesk Forge有點熟悉的朋友可能都聽過 viewer-navigation.sample 這個樣例，他是Autodesk Forge官方第一個針對小地圖這個需求推出的樣例，他的執行畫面長得像下面這樣：javascript
看到這裏，你可能會想說直接拿他的代碼來套用，但這樣就不太妙了。由於他最主要的數據來源 rac.json 是手動產生、寫死的 (hard-code)，沒辦法套用在其餘模型。html
//https://github.com/Autodesk-Forge/viewer-navigation.sample/blob/master/www/rac.json
{
"racsimple": {
"viewboxes": [
{
"box": [
61.30275909098552,
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251.63262845992332
],
"floor": 0
},
{
"box": [
411.29704813713875,
572.8253921735151,
718.0903793548525,
251.63262845992332
],
"floor": 1
}
],
"floorHeight": 10,
"floorBase": -5,
"scale": 3.0529685252835925,
"yoffset": 305.5828538654896,
"xoffset": 173.35610564383717,
"paperZ": -0.8462999999999852
},
"racadvanced": {
"viewboxes": [
{
"box": [
147.11470672360943,
708.9971656430058,
876.6206449475018,
167.1180614813956
],
"floor": 0
}
],
"floorHeight": 10,
"floorBase": -17,
"scale": 3.0487993483101437,
"yoffset": 438.1741498717732,
"xoffset": 742.2887834445044,
"paperZ": -1.1969100000000026
}
}
所幸在Autodesk開發部的同事們的努力下，小夥伴們呼聲最大的 Forge Viewer原生小地圖 (Minimap)功能終於釋出了，藉助AecModelData.json，感謝讚歎 BIM360 開發團隊！他的執行畫面長得像下面這樣：java
如今咱們就來看看要怎麼使用這個小地圖擴展 (Autodesk.AEC.Minimap3DExtension)，下面是加載步驟及注意事項：git
- 上傳
RVT文檔到Forge Model Derivative轉換SVF。 - 在 viewer 里加載
Autodesk.AEC.Minimap3DExtension擴展前調用Document.downloadAecModelData()確保AECModelData.json數據有被加載。 - 在 viewer 里加載
Autodesk.AEC.Minimap3DExtension - 切換導覽工具到第一人稱模式
注意1：這個樣例使用到了另外一個 Autodesk.AEC.LevelsExtension 擴展，用來進行樓層剖切
注意2：僅只持Revit 2018及以後版本的RVT文檔，
注意3：模型必須在 2019 年 5 月以後轉換纔會生成 AecModelData.json，在這以前的轉換的模型能夠透過在轉換請求的標頭加上 x-ads-force: true 參數來從新轉換github
- 樣例代碼：
Autodesk.Viewing.Initializer(options, () => {
const div = document.getElementById('forgeViewer');
const config = { extensions:[
'Autodesk.AEC.LevelsExtension',
'Autodesk.AEC.Minimap3DExtension'
]};
viewer = new Autodesk.Viewing.Private.GuiViewer3D(div, config);
viewer.start();
Autodesk.Viewing.Document.load(`urn:${urn}`, (doc) => {
var viewables = doc.getRoot().getDefaultGeometry();
doc.downloadAecModelData();
viewer.loadDocumentNode(doc, viewables).then( onLoadFinished );
viewer.addEventListener( Autodesk.Viewing.TEXTURES_LOADED_EVENT, ()=>{
viewer.getExtension('Autodesk.BimWalk').activate();
});
});
-
AecModelData.json的樣例內容：
{
"version": "1.0.0",
"documentId": "89238809-6583-4ac2-a83a-29a2c04bc7b7",
"phases": [
{
"name": "Existing"
},
{
"name": "New Construction"
}
],
"levels": [
{
"guid": "e3e052f9-0156-11d5-9301-0000863f27ad-00000137",
"name": "01 - Entry Level",
"elevation": 0,
"height": 12.467191601054822,
"extension": {
"buildingStory": true,
"structure": false,
"computationHeight": 3.9370078740157473,
"groundPlane": false,
"hasAssociatedViewPlans": true
}
},
{
"guid": "458c0e49-01bb-11d5-9302-0000863f27ad-000002b6",
"name": "02 - Floor",
"elevation": 12.467191601054822,
"height": 12.467191601044725,
"extension": {
"buildingStory": true,
"structure": false,
"computationHeight": 3.9370078740157473,
"groundPlane": false,
"hasAssociatedViewPlans": true
}
},
{
"guid": "e755b16e-7be3-4a21-978e-6b4aa426b0a4-00021496",
"name": "03 - Floor",
"elevation": 24.934383202099546,
"height": 12.46719160104987,
"extension": {
"buildingStory": true,
"structure": false,
"computationHeight": 3.9370078740157473,
"groundPlane": false,
"hasAssociatedViewPlans": true
}
},
{
"guid": "e755b16e-7be3-4a21-978e-6b4aa426b0a4-00021642",
"name": "Roof",
"elevation": 37.401574803149416,
"height": 1.968503937008066,
"extension": {
"buildingStory": true,
"structure": false,
"computationHeight": 0,
"groundPlane": false,
"hasAssociatedViewPlans": true
}
},
{
"guid": "e755b16e-7be3-4a21-978e-6b4aa426b0a4-0002175f",
"name": "Parapet",
"elevation": 39.37007874015748,
"height": 2147483647,
"extension": {
"buildingStory": true,
"structure": false,
"computationHeight": 0,
"groundPlane": false,
"hasAssociatedViewPlans": false
}
}
],
"scopeBoxes": [],
"refPointTransformation": [
1,
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],
"levelOccluderIds": [
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],
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"hasBreaks": false,
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"viewGuid": "c3f5348f-6947-4ddf-aa1e-749882f86acc-00000138",
"viewType": "FloorPlan",
"viewportRotation": 0,
"scale": 100,
"sectionBox": {
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"z": 0
},
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"topClipPlane": {
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"hasRegions": false,
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