Orthogonal line segments are not horizontal

[richardwhitehead]

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Describe the bug Lines of style "orthogonal" are not actually orthogonal.

To Reproduce Steps to reproduce the behavior:

1. Drag a line or arrow onto the drawing sheet. It appears at about 45 degrees, with both ends snapped to grid points.
2. Change the line style from Straight to Orthogonal
3. Observe that the horizontal part of the line is not exactly horizontal - it has an angle of perhaps one degree.
4. Sometimes it is possible to correct this by dragging one segment of the line, other times it cannot be fixed.

Expected behavior The horizontal section should be at zero degrees and the vertical section at 90 degrees.

Screenshots

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version v24.6.4 (desktop app)
• daw.io version 24.7.2 (in browser)

Desktop (please complete the following information):

• OS: Windows 11
• Browser: Chrome
• Browser Version: 126.0.6478.182 (Official Build) (64-bit)

I tested the problem in incognito/private mode with all browser extensions switched off, write "yes" below:

• Yes

Additional context Add any other context about the problem here.

[Serengan]

I have already opened a similar issue

https://github.com/jgraph/drawio-desktop/issues/1495