fix: After horizontally flipping the child elements within the group, the cursor display is incorrect

[zhe-he]

I noticed that when a child element is flipped horizontally, its angle is reduced by 180 degrees. Therefore, I updated the calculation to obtain the total angle of the child element - when it's horizontally flipped, I added back the 180 degrees that were subtracted.

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Build Stats

file / KB (diff)	bundled	minified
fabric	919.693 (+1.834)	302.555 (+0.389)

[asturur]

That won't work all the time, we need to find the angle independently from the matrix.

[asturur]

Try to follow this fix:
get the center point of the object, get the point of the center point corner you are hovering.
Use createVector utility to make a vector between the 2 points, use calcVectorRotation to get the angle of this vector, use this angle to find in which quadrant are you.
This will be independent from the transform matrix and we can avoid the bug.

[zhe-he]

Got it, I'll go with your suggestion. First, I need to figure out how to determine the coordinates of the four corners.

[zhe-he]

Try to follow this fix: get the center point of the object, get the point of the center point corner you are hovering. Use createVector utility to make a vector between the 2 points, use calcVectorRotation to get the angle of this vector, use this angle to find in which quadrant are you. This will be independent from the transform matrix and we can avoid the bug.

Done, please check

[asturur]

I m back from a couple of full days.
I m pretty much sure we can use the current vector functions to do what you did, let me try today, i ll get back to you

[asturur]

I didn't forget about this, i just don't have time to sit down and check properly