Find Size of GameObject

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Hi there,

I would like to know how to find the size of an object. eg vector3(10.0f,10.0f,10.0f); gameOjbject.size:vector3

What code would I have to use to find the total size of a GameObject? How would I do it.

Thanks

Answer 1

Best Answer

Answer by Mike 3 · Aug 03, 2010 at 11:12 AM

If the object has a renderer, then renderer.bounds.size will give you what you want

Next best thing would probably be collider.bounds.size

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jdwieber · May 31, 2012 at 06:00 PM 0

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Thank you for this post. When I try this with the collider.bounds.size, it always returns (0,0,0). However, the render.bounds.size works like a charm for objects with a renderer attached. Any idea what would cause the collider.bounds.size call to return vector3.zero? I ask because I have some triggers in the game world that I want to query the size of to avoid hard coding the sizes. Thanks.

jdwieber · May 31, 2012 at 06:32 PM 0

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Never $$anonymous$$d, I think I found the answer. I think that it is because the object I was testing with is a prefab that I instantiate and is not yet placed in the scene, so it is inactive.

jdwieber · May 31, 2012 at 07:47 PM 0

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Neither method works for an LOD group :(

KokodokoGames · Aug 31, 2015 at 01:03 PM 1

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Thanks... of course a forum is meant for people who get stuck using the basic documentation... But it's working now.

FurretTurret · Jan 16, 2017 at 08:38 PM 1

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Note that this give the axis-aligned, world space bounding box (as per the mentioned Renderer documentation), so if your object is rotated then renderer.bounds and collider.bounds will change.

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Answer 2

Answer by obiolg · Mar 19, 2015 at 12:16 PM

The correct code for recent version of Unity is:

 GetComponent<Collider>().bounds.size
 GetComponent<Renderer>().bounds.size

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shaneparsons · Jul 19, 2016 at 08:41 PM 0

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I seem to not have issues with renderer when there is a renderer, but collider always seems to return vector3.zero. Any ideas?

DCorboy shaneparsons · Jul 19, 2016 at 11:47 PM 0

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Quick thought based on jdweiber's comment: is your object instantiated in the scene?

shaneparsons DCorboy · Jul 20, 2016 at 02:23 PM 0

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It is indeed

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Kelgand shaneparsons · Apr 26, 2017 at 01:48 AM 0

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I had the same issue, but it was because I'm working with a Collider2D. There was no Collider component, so it returned zero.

Answer 3

Answer by DCorboy · Mar 28, 2015 at 01:11 AM

I believe the correct Unity5 code is:

 GetComponent.<Collider>().bounds.size
 GetComponent.<Renderer>().bounds.size

The '.' before the requested component is needed.

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adder_be · Apr 13, 2015 at 12:03 PM 1

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This is incorrect, obiolg's answer shows the correct code.

huulong · Apr 18, 2015 at 05:31 PM 0

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This must be UnityScript's syntax. In any case make sure the collider is enabled and the object active.

TimK_personal · May 05, 2015 at 10:52 PM 1

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Yes, that's UnityScript. Based on ActionScript, which also features that atrocity

Answer 4

Answer by Darkgaze · Nov 07, 2018 at 10:16 AM

transform.bounds gives you the global size, axis oriented.

if you want the REAL size of the object, ignoring the transformations done to the object, use mesh.bounds which gives you the local size of the mesh.

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BrandonHill · Dec 11, 2018 at 01:14 PM 0

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Can you provide a link to the docs for Transform.bounds? I can't find it in the script reference. I think you might be mistaken.

Answer 5

Answer by mheyman · Jan 12, 2017 at 10:21 AM

For 2D sprite:

 var p1 = gameObject.transform.TransformPoint(0, 0, 0);
 var p2 = gameObject.transform.TransformPoint(1, 1, 0);
 var w = p2.x - p1.x;
 var h = p2.y - p1.y;

This works whether or not the item is active.

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tomtomhotep · Mar 29, 2017 at 10:46 PM 0

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This did not work for me. For my 2D sprite GameObject your code gave me a w=-19 & h=1. I know my GameObject is 6840 unity units wide and 504 units tall. The sprite itself is 360x504 pixels with Pixels per Unit = 1. And the Transform Component of the GameObject has X Scale of 19 and Y rotation of 180. I see that your w is negative because you're not accounting for rotation, but it doesn't look like you're accounting for the size of the sprite at all, either.

tony0991 · Jul 08, 2018 at 05:46 PM 0

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Worked perfectly for me. w corresponded to the game object size I got in the inspector. I was interested in the screen size (sw) which I converted as below. It changes according to the size of the viewport, as expected

         var p1 = ballControl.transform.TransformPoint(0, 0, 0);
         var p2 = ballControl.transform.TransformPoint(1, 1, 0);
         var s1 = refPosition = Camera.main.WorldToScreenPoint(p1);
         var s2 = refPosition = Camera.main.WorldToScreenPoint(p2);
         var w = p2.x - p1.x;
         var sw = s2.x - s1.x;

Find Size of GameObject

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