Change Sprite Pivot/Bounds from Script

Question

I searched all over the place (Google, Forums, here at Answers) with no luck, so excuse me if this is already answered (somewhere).

I would like to change the pivot of a Sprite through scripting.

So normally I would write:

 Sprite sprite; // some sprite reference
 sprite.bounds.center = Vector2.zero; // the preferable pivot

Or if there was a "pivot" set method like

 sprite.SetPivot(Vector2.zero); // or something similar

Since sprite.bounds is property AND readonly it cannot be assigned (Even if I create a new Bounds variable). There is not even a setter property in Sprite class to do the job, so my question is, is there a way to change sprite's pivot through scripting?

Thank you.

Answer 1

Answer by robertbu · Feb 10, 2014 at 04:41 AM

I don't know how much of the Sprite technology you need. You could make the sprite a child of an empty game object and use localPosition to change the anchor. You could also roll your own sprite using a Quad, or there are third-party solutions. Sorry I cannot be more helpful.

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Answer 2

Answer by Lttldude · Dec 06, 2020 at 05:22 AM

I made a tool for setting the Sprite pivot points in the editor while maintaining their world positions: https://github.com/thepowerprocess/UnitySpritePivotEditor

alt text

This is the part where the sprite texture is edited:

 SpriteRenderer sr = selectedGameObject.GetComponent<SpriteRenderer>();
 string path = AssetDatabase.GetAssetPath(sr.sprite.texture);
 TextureImporter ti = (TextureImporter)AssetImporter.GetAtPath(path);
 Vector2 newPivot = new Vector2(childMousePos.x / (sr.sprite.texture.width / sr.sprite.pixelsPerUnit), childMousePos.y / (sr.sprite.texture.height / sr.sprite.pixelsPerUnit)) + ti.spritePivot;
 ti.spritePivot = newPivot;
 TextureImporterSettings texSettings = new TextureImporterSettings();
 ti.ReadTextureSettings(texSettings);
 texSettings.spriteAlignment = (int)SpriteAlignment.Custom;
 ti.SetTextureSettings(texSettings);
 ti.SaveAndReimport();

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Change Sprite Pivot/Bounds from Script

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