How to get distance from position to transform bounds

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Hey guys, this has been bugging me for some days now. Quite new to Unity, and it is possible that I misunderstood some concepts, so bear with me, please :).

I am trying to script a camera so that it can orbit a transform and zoom in right to the edge. The focal point of the camera is the transform pivot. The transform does not have the pivot right in the center, so I have to set the minimum distance of the camera as the max(distances between pivot and object bounds).

Is there any way to calculate this?

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Answer by valyard · Nov 07, 2012 at 01:59 PM

Do you use Renderer.bounds? Because it has center property which is the mesh's geometrical center. So you could orbit around it with max(bounds.extents.x, bounds.extents.y, bounds.extents.x) radius.

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Tehnique · Nov 07, 2012 at 02:12 PM 0

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I do use it, but it seems my camera is centered on the transform pivot and not the geometrical center. I will try to set the camera focus point on the geometrical center and use your sugestion. If it works i will post the script later for other people to use.

Tehnique · Nov 07, 2012 at 09:37 PM 0

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I ended up using this:

 distance$$anonymous$$in = $$anonymous$$athf.$$anonymous$$ax($$anonymous$$athf.Abs(Get$$anonymous$$eshBoundingBox(target).max.x - target.localPosition.x), 
                                 $$anonymous$$athf.Abs(target.localPosition.x - Get$$anonymous$$eshBoundingBox(target).$$anonymous$$.x),
                                 $$anonymous$$athf.Abs(Get$$anonymous$$eshBoundingBox(target).max.y - target.localPosition.y), 
                                 $$anonymous$$athf.Abs(target.localPosition.y - Get$$anonymous$$eshBoundingBox(target).$$anonymous$$.y),
                                 $$anonymous$$athf.Abs(Get$$anonymous$$eshBoundingBox(target).max.z - target.localPosition.z), 
                                 $$anonymous$$athf.Abs(target.localPosition.z - Get$$anonymous$$eshBoundingBox(target).$$anonymous$$.z));

where Get$$anonymous$$eshBoundingBox is:

 static public Bounds Get$$anonymous$$eshBoundingBox(Transform transform) {
         
         GameObject gameObj = transform.gameObject;
         $$anonymous$$eshRenderer[] meshFilter = gameObj.GetComponentsInChildren<$$anonymous$$eshRenderer>();
 
         if (meshFilter.Length>0) 
         {
             Bounds bounds = meshFilter[0].bounds;
             for (int i=1; i<meshFilter.Length; i++) 
             {
                 bounds.Encapsulate(meshFilter[i].bounds);
             }
             return bounds;
         }
         
         else return new Bounds();
 
     }

valyard Tehnique · Nov 07, 2012 at 10:48 PM 0

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Doesn't seem right. You are getting distance aligned with axes, not distance from camera. Also why would you have more than one $$anonymous$$eshRenderer? And it would be a good idea to call Get$$anonymous$$eshBoundingBox just once and save it to a variable.

Tehnique Tehnique · Nov 08, 2012 at 07:51 AM 0

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Distance aligned with axis is what i need. I want the $$anonymous$$imum distance to be the maximum of how much the target extends on any axis.

Agree about using just one $$anonymous$$eshRenderer and calling Get$$anonymous$$eshBoundingBox only once, will change my code.

How to get distance from position to transform bounds

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