Last time, we talked about Move viewer's camera along by drawing travel/walking paths in the Forge Viewer. It demonstrated how to move viewer's camera along a walking path.
This time, I made a mutation of this code sample. Let's see how to move the camera to a Revit room.
Here is the implementation (Note that this extension is designed for 3D models.)
(function () {
class RoomListPanel extends Autodesk.Viewing.UI.DockingPanel {
constructor(parent) {
const options = {};
// Height adjustment for scroll container, offset to height of the title bar and footer by default.
if (!options.heightAdjustment)
options.heightAdjustment = 70;
if (!options.marginTop)
options.marginTop = 0;
//options.addFooter = false;
const viewer = parent.viewer;
super(viewer.container, viewer.container.id + 'RoomListPanel', 'Rooms', options);
this.container.classList.add('adn-docking-panel');
this.container.classList.add('adn-room-list-panel');
this.createScrollContainer(options);
this.viewer = viewer;
this.parent = parent;
this.options = options;
this.uiCreated = false;
this.addVisibilityListener(async (show) => {
if (!show) return;
if (!this.uiCreated)
await this.createUI();
});
}
async createUI() {
this.uiCreated = true;
const div = document.createElement('div');
const treeDiv = document.createElement('div');
div.appendChild(treeDiv);
this.treeContainer = treeDiv;
this.scrollContainer.appendChild(div);
const data = await this.getRoomData();
this.buildTree(data);
}
async getRoomData() {
const getRoomDbIds = () => {
return new Promise((resolve, reject) => {
this.viewer.search(
'Revit Rooms',
(dbIds) => resolve(dbIds),
(error) => reject(error),
['Category'],
{ searchHidden: true }
);
});
};
const getPropertiesAsync = (dbId) => {
return new Promise((resolve, reject) => {
this.viewer.getProperties(
dbId,
(result) => resolve(result),
(error) => reject(error),
);
});
}
const data = [];
try {
const roomDbIds = await getRoomDbIds();
if (!roomDbIds || roomDbIds.length <= 0) {
throw new Error('No Rooms found in current model');
}
for (let i = 0; i < roomDbIds.length; i++) {
const dbId = roomDbIds[i];
const propData = await getPropertiesAsync(dbId);
data.push({
id: propData.externalId,
dbId,
name: propData.name
});
}
} catch (ex) {
console.warn(`[RoomListPanel]: ${ex}`);
throw new Error('Failed to extract room data');
}
return data;
}
getBoundingBox(dbId) {
const model = this.viewer.model;
const it = model.getInstanceTree();
const fragList = model.getFragmentList();
let bounds = new THREE.Box3();
it.enumNodeFragments(dbId, (fragId) => {
let box = new THREE.Box3();
fragList.getWorldBounds(fragId, box);
bounds.union(box);
}, true);
return bounds;
}
buildTree(data) {
const nodes = [];
for (let i = 0; i < data.length; i++) {
const node = {
id: data[i].id,
dbId: data[i].dbId,
type: 'spaces',
text: data[i].name
};
nodes.push(node);
}
console.log(nodes);
$(this.treeContainer)
.jstree({
core: {
data: nodes,
multiple: false,
themes: {
icons: false,
name: 'default-dark'
}
},
sort: function (a, b) {
const a1 = this.get_node(a);
const b1 = this.get_node(b);
return (a1.text > b1.text) ? 1 : -1;
},
checkbox: {
keep_selected_style: false,
three_state: false,
deselect_all: true,
cascade: 'none'
},
types: {
spaces: {}
},
plugins: ['types', 'sort', 'wholerow'],
})
.on('changed.jstree', async (e, data) => {
console.log(e, data);
console.log(data.node.original);
const { dbId } = data.node.original;
if (!dbId) return;
const bbox = this.getBoundingBox(dbId);
const center = bbox.center();
const point = new THREE.Vector3(center.x, center.y, bbox.min.z);
this.parent.tweenToPoint(point);
});
}
}
class MoveToRoomExtension extends Autodesk.Viewing.Extension {
constructor(viewer, options) {
super(viewer, options);
this.cameraTweenTool = null;
this.uiCreated = false;
}
onToolbarCreated(toolbar) {
const panel = new RoomListPanel(this);
viewer.addPanel(panel);
this.panel = panel;
const roomsPanelButton = new Autodesk.Viewing.UI.Button('room-panel-button');
roomsPanelButton.onClick = () => {
panel.setVisible(!panel.isVisible());
};
roomsPanelButton.setToolTip('Open room list panel');
this.group = new Autodesk.Viewing.UI.ControlGroup('room-nav-tool-group');
this.group.addControl(roomsPanelButton);
toolbar.addControl(this.group);
}
tweenToPoint(point) {
this.viewer.setActiveNavigationTool('bimwalk');
const views = [];
const up = new THREE.Vector3(0, 0, 1);
const currentEye = this.viewer.navigation.getPosition().clone();
const targetPos = point.clone().add(up.clone().multiplyScalar(1.7 * 3.2808399));
const sightDir = point.clone().sub(currentEye).normalize();
const eyeLen = this.viewer.navigation.getEyeVector().length();
const target = targetPos.clone().add(sightDir.clone().multiplyScalar(eyeLen));
views.push({
up: up.toArray(),
eye: targetPos.toArray(),
target: target.toArray()
});
this.processTweens(views);
}
executeTweenPromised(view) {
return new Promise((resolve, reject) => {
const onTweenExecuted = (event) => {
console.log(event);
this.viewer.removeEventListener(
Autodesk.ADN.CameraTweenTool.CAMERA_TWEEN_ANIMATION_COMPLETED_EVENT,
onTweenExecuted
);
resolve();
};
this.viewer.addEventListener(
Autodesk.ADN.CameraTweenTool.CAMERA_TWEEN_ANIMATION_COMPLETED_EVENT,
onTweenExecuted
);
this.cameraTweenTool.tweenCameraTo({ viewport: view });
});
}
processTweens(data) {
//process each promise
//refer to http://jsfiddle.net/jfriend00/h3zaw8u8/
const promisesInSequence = (tasks, callback) => {
const results = [];
return tasks.reduce((p, item) => {
return p.then(() => {
return callback(item).then((data) => {
results.push(data);
return results;
});
});
}, Promise.resolve());
};
//start to process
return promisesInSequence(data, (d) => this.executeTweenPromised(d));
}
async load() {
const loadCSS = (href) => new Promise(function (resolve, reject) {
const el = document.createElement('link');
el.rel = 'stylesheet';
el.href = href;
el.onload = resolve;
el.onerror = reject;
document.head.appendChild(el);
});
await Promise.all([
Autodesk.Viewing.Private.theResourceLoader.loadScript('https://unpkg.com/@tweenjs/tween.js@18.6.4/dist/tween.umd.js', 'TWEEN'),
Autodesk.Viewing.Private.theResourceLoader.loadScript('https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js', '$'),
Autodesk.Viewing.Private.theResourceLoader.loadScript('https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.7/jstree.min.js', '$'),
loadCSS('https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.7/themes/default/style.min.css'),
loadCSS('https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.7/themes/default-dark/style.min.css'),
this.viewer.loadExtension('Autodesk.BimWalk'),
this.viewer.loadExtension('Autodesk.ADN.CameraTweenTool')
]);
this.viewer.setBimWalkToolPopup(false);
this.cameraTweenTool = this.viewer.getExtension('Autodesk.ADN.CameraTweenTool');
console.log('MoveToRoomExtension has been loaded.');
return true;
}
async unload() {
this.viewer.unloadExtension('Autodesk.ADN.CameraTweenTool');
this.viewer.setBimWalkToolPopup(true);
delete this.cameraTweenTool;
this.cameraTweenTool = null;
console.log('MoveToRoomExtension has been unloaded.');
return true;
}
}
Autodesk.Viewing.theExtensionManager.registerExtension('Autodesk.ADN.MoveToRoomExtension', MoveToRoomExtension);
})();Here is the demo video:
And here is the complete code sample. Hope you enjoy it!
https://github.com/yiskang/forge-viewer-traveling-path/tree/room-navigation/public/js
