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 BaseLayer(Image), PerimeterLayer(Polygon), BoxLayers(Multiple Polygons)		  New Topic  Reply to Topic
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andyhill

Australia
159 Posts
Posted - Feb 22 2025 :  13:15:52  Show Profile  Reply
How do I reference a Selected BoxLayer X/Y Offset against the underling Perimeter Layer ?
eg.
|-------------------------------------------------------------------------------|
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                  |----|       |
|                                                                  |    |       |
|                                                                  |----|       |
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                               |
|                                                                               |
|-------------------------------------------------------------------------------|

All of my testing for X/Y points only relates to Box Layer, I need to reference Box Layer Offset Points against the underlying Perimeter Layer (without merging layers) ?

Please advise - Thanks in advance

Andy

xequte

38940 Posts
Posted - Feb 23 2025 :  02:12:08  Show Profile  Reply
Hi Andy

Why not just subtract the PosX,PosY for the perimeter from the box layer PosX,PosY?

Nigel
Xequte Software
www.imageen.com
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andyhill

Australia
159 Posts
Posted - Feb 23 2025 :  17:15:44  Show Profile  Reply
Tried that but all sorts of irregularities. I am now doing this after each Layer Creation

ImageEnView.LayersSetProperties(LYR_ALL_LAYERS, IELP_RulerUnits, IntToStr(ord(IEGlobalSettings().DefaultMeasureUnit)));

will advise

Andy
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xequte

38940 Posts
Posted - Feb 23 2025 :  19:39:45  Show Profile  Reply
Hi Andy

Sorry, I'm not sure what you mean by that. Perhaps I'm not quite understanding your requirements.

The position of a point on a layer (in terms of the underlying bitmap) can be obtained using:

https://www.imageen.com/help/TImageEnView.XScr2Bmp.html
https://www.imageen.com/help/TImageEnView.YScr2Bmp.html

Or for the layer:

https://www.imageen.com/help/TIELayer.ConvXScr2Bmp.html
https://www.imageen.com/help/TIELayer.ConvYScr2Bmp.html

And the origin of each layer (its PosX, PosY) is specified in terms of the underlying bitmap.

Nigel
Xequte Software
www.imageen.com
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andyhill

Australia
159 Posts
Posted - Feb 24 2025 :  13:47:56  Show Profile  Reply
Thanks Nigel.

Also I have set the Scale

ImageEnView.SetScale(941, 91.44, ieuCentimeters);

So all measurements are now returned with the Scale taken into consideration - YES ?



Andy
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xequte

38940 Posts
Posted - Feb 24 2025 :  18:00:22  Show Profile  Reply
Sorry Andy, which measurements are you referring to?


Nigel
Xequte Software
www.imageen.com
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andyhill

Australia
159 Posts
Posted - Feb 25 2025 :  12:49:10  Show Profile  Reply
My question was once I set the Scale, then irrespective of Zoom, Layer or DPI, all of the XScr2Bmp functions etc. will return results based on Scale - Is this correct ?

Andy
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xequte

38940 Posts
Posted - Feb 25 2025 :  13:46:20  Show Profile  Reply
No, that's not correct. XScr2Bmp only converts a pixel position on the screen (affected by zoom and scrolling) into a pixel on the bitmap.



Nigel
Xequte Software
www.imageen.com
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