How to calculate visual center of polygon?
lazarus / 39-Graphics

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loaded · 2023-05-25 05:47

Hi All,
There is a sample application sent by @jamie in the relevant https://f
orum.lazarus.freepascal.org/index.php/topic,63430.msg480438.html#msg48
0438link. The application calculates the visual and real centroids of
the polygons. It gives correct results in screen coordinates. But it
gives incorrect results in real world coordinates.
What I need is the visual center point. When I want to write label
information to the fields, visual confusion occurs in polygons whose
center of gravity is outside the fiel
In practice, when we convert the real world coordinates to screen
coordinates and calculate, it takes a very long time to calculate
about 100k polygons.
I asked on @jamie but I guess he's too busy, he hasn't replied yet.
I also want to ask you;
I would be very pleased if the relevant experts would examine the
example and explain the working logic when they are available.
Respects.