CODEWITHSUNDEEP
zoomingscreenshotbounding-boxautodesk-viewer
Balaji Pastapure
Balaji Pastapure

Reputation: 1

How to zoom in to fit the exact bounding box in Autodesk forge viewer

We want to zoom-in to a 2D sheet in forge-viewer to take screenshot and stitch multiple screenshot later to get better image quality. We are facing issue to zoom-in to exact bounding box, it always is little less zoomed-in i.e. we can see portion of sheet which shouldn't be part of screenshot. Take a case of dividing a 2D sheet in equal 4 quadrants to zoom-in and take screenshot (we can increase quadrants/sections as per the required image quality later), we use below code to zoom-in,

var max = viewer.model.getBoundingBox().max;
var min = viewer.model.getBoundingBox().min;
var Q1Min = new THREE.Vector3( min.x, min.y, 0 )
var Q1Max = new THREE.Vector3( (min.x)+(max.x)/2, (min.y)+(max.y)/2, 0 )
var Q1Box =  new THREE.Box3(Q1Min, Q1Max);
viewer.navigation.fitBounds( immediate, Q1Box);

We also tried using below method, it also produces same result
viewer.impl.setViewFromViewBox(viewer.model, [Q1Min.x,Q1Min.y,Q1Max.x,Q1Max.y],'Q1',true)

Full sheet view as seen in browser.

Result after above code execution.

Required result, notice the difference in width of image. In some case height and width both become an issue.

Upvotes: 0

Views: 1165

Answers (2)

quoc187
quoc187

Reputation: 11

For anyone that is looking for the solution, Autodesk has 2 constant to set margin horizontally and vertically, you can set them to 0 to get the exact fit. Log viewer.navigation to the console you should be able to see the source, from then you should see 2 uppercase property end with MARGIN, update them

Upvotes: 0

Bryan Huang
Bryan Huang

Reputation: 5342

Engineering came back and offered the same workaround - and see a live sample I just put together to zoom in programmatically here:

  var direction = new THREE.Vector3();
  camera.getWorldDirection( direction );
  camera.position.add( direction.multiplyScalar(distance) ); //set distance move the camera forward to your needs
  viewer.navigation.setView(camera.position,viewer.navigation.getTarget())

Also see here and here for code samples putting the above into practice.

They conceded that this could be a bug but didn't provide more details - will chase them up but guess they got other priorities for the moment like to maintain the newly released Viewer v7.

Upvotes: 0

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