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Ground Poly as reference - Question / Observation

WTFlorian

WTFlorian

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212
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austria
Hello,

i was exporting an object to P3DV5, the same way as i always did, via the MCX "Convert & place" wizard using the same coordinates i've used for this entire project - BUT, with this object i used my Ground Polys as a reference, i never did that before.

So, i had my GroundPolys open in Blender and then placed my object (the orange highlighted objects) right where i would want them to be. Right on the edge of the white/red lines.

Screenshot (317).pngScreenshot (318).png

But when i open the sim the object is slightly misplaced - now my question is - is this because of the ground poly not beeing a flat plane due to earth's curvature ?
So, it looks fine in Blender because it's completely flat there - but not in sim and this is where the slight misplacement comes from ?

This has been bugging me, so i thought i'd just ask.
Your help is much appreciated.
 

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Hi,

Did you process your ground polygons with the GPW in MCX? In that case they will indeed but curved to match the curve of the earth. But that will cause an offset indeed if you try to align another object to them. You can probably best correct that other object for the earth curve as well, you can do that in the Earth Curve Editor in MCX.
 
arno said:
Did you process your ground polygons with the GPW in MCX?
Click to expand...
Yes i did, sorry, i should have mentioned that.

This was bugging me since yesterday, but only today did i think of this beeing the issue. (Yeah, i'm not the sharpest tool in the shed)
Applying the "earth curve correction" solved my problem, thank you very much Arno.

Cheers
 
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