Normalize Angle Calculations

Developer
1

Well this one was over due. About 5 years ago I added a function to normalize the calculated value of angles to the display the angle normalized between 0 and 360. At the time though I didn’t know how to apply the normalized evaluated formula only to angles… or where to even find the part in the Property Editor code that actually sets the calculated text. :roll_eyes:

So better late than never:

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Screenshot 2026-02-12 173411
Screenshot 2026-02-12 173411663×345 14 KB

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This will be one more to scratch of the Github issues. :slight_smile:

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2

Now I’m having trouble wrapping my mind around 999 being equal to 99999, but they both have a remainder of 279 when divided by 360, so it must be true.

As far as I could tell, trying each tool as best I could, the AppImage is working as indicated. (Except Images, which has always been a bit different anyway.)

:unicorn:

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3

Hmmm. That is correct. The ImageDialog does not use formulas… thus there is no calculated value. The min and max values for the spinbox are set to -360 (CW) and 360 (CCW). Yes we could have made it 0-360, but I’m not going to change it now, lest we then have to add a new schema and conversion to normalize the negative angles. Dealing with -360 to 360 is not that big a deal… it’s wrapping your head around angles like 546.89. :slightly_smiling_face:

Technically we could normalize between -360 and 360 as that’s how I wrote the routine:

qreal DialogTool::normalize(const qreal value, const qreal start, const qreal end)
{
  const qreal range       = end - start   ;   
  const qreal offsetValue = value - start ;   // value relative to 0

  // + start to reset back to start of original range
  return (offsetValue - (floor( offsetValue / range) * range)) + start ;
}

But in the issue Sue wanted 0-360.

Then in the Eval() routine which is generic for any formula I thought of a simple solution to only normalize angles: :slight_smile:

if (postfix == degreeSymbol)
{
    result = normalize(result, 0, 360);
}
label->setText(qApp->LocaleToString(result) + " " + postfix);
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