Remove calls to updateDrawableSkinIdRotationCenter #2314
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adroitwhiz
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adroitwhiz
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Jan 30, 2020
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Make sure you test this after merging scratchfoundation/scratch-render#561 -- there are some existing rotation-center-related issues in the codebase that may interfere with testing. |
fsih
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Mar 26, 2020
This was referenced Apr 2, 2020
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Proposed Changes
This PR removes calls to
Renderer.updateDrawableSkinIdRotationCenter, replacing them with calls toRenderer.updateDrawableSkinId.It also fixes
loadBitmap_to properly set bitmap costumes' rotation centers.Reason for Changes
Everywhere in the current codebase, updating a drawable's rotation center should do nothing.
It appears to be a vestige of the time when rotation centers belonged to
Drawables and notSkins (the code to update drawables' rotation centers was added Oct 9, 2016,Skins were introduced Dec 28, 2016).Fixing a long-standing bug with vector costumes in
scratch-render(see scratchfoundation/scratch-render#550 for a detailed writeup) involves changes to the way vector costumes' rotation centers are set; notably, changing the rotation center requires re-loading the SVG. Supporting the ability to set a skin's rotation center after it is created makes the requiredscratch-renderfix much harder to implement.Furthermore, since the functionality to set a
Drawable's rotation center is currently effectively unused, changing the parts ofscratch-renderthat involve rotation centers could break it unknowingly, causing future headaches if others try to use the API.Finally, as I mentioned earlier, rotation centers now belong to
Skins (which correspond to costumes), so it doesn't make sense to consider them a "Drawableproperty".There was one case in which updating a costume's rotation center actually did something: when first loading a bitmap, the costume rotation center was not divided by 2. The call to
updateDrawableSkinIdRotationCenterwhen setting a target's costume, which did properly set the rotation center for bitmap costumes, hid this oversight.