I am trying to take the tag GPS Img Direction from a 0-360 value to a +/-180 value and output it as the tag KMLHeading. Here is the code I have in the config file.
line 279 KMLHeading => {
line 280 Require => {
line 281 0 => 'GPSImgDirection',
line 282 },
line 283 my $kmlh = $val[0],
line 284 if ($val[0] > 180) {
line 285 ValueConv => '$kmlh = ($val[0]-180)*-1';
line 286 }
line 287 ValueConv => $kmlh
line 288 },
The error I am getting when running through the command prompt is
syntax error at custom.config line 284, near "if"
I am unsure what is wrong and if there is a more proper way to code this.
There are a few problems, and your math skills are dubious. ;)
Try this:
%Image::ExifTool::UserDefined = (
'Image::ExifTool::Composite' => {
KMLHeading => {
Require => 'GPSImgDirection',
ValueConv => '$val - ($val > 180 ? 360 : 0)',
},
},
);
1;
- Phil
Thank you.
Could you explain this portion so i can learn. '$val - ($val > 180 ? 360 : 0)'
As for the math what is incorrect about it? Example 270-180=90, then inverting 90 * (-1) for -90
Quote from: ColtenH on July 17, 2024, 01:19:43 PMCould you explain this portion so i can learn. '$val - ($val > 180 ? 360 : 0)'
As for the math what is incorrect about it? Example 270-180=90, then inverting 90 * (-1) for -90
Your example choice of -90 degrees is unfortunate.
What if the direction is 359 degrees?: 359 - 180 = 179. Negating this is -179. But the relative direction should be -1, right? (1 degree to the left).
My code subtracts 360 if the value is greater than 180. So 359 turns into -1.
- Phil