in FT3, rotate a map ?

JimP · February 2012

I found a map in ft3 i want to use, but I would like to rotate it 180 degrees, swap east for west.

I don't see anything in the ft3 help file on this in rotate nor in export. No rotate method I can find.

The only way I can think of to do it in CC3, would be to import the map as a bmp or png, that has been rotated, and trace the map from that.

Is there another way to rotate a ft3 map ?

Thanks.

Monsen · February 2012

Rotation is simple, just define a custom projection in the Projections.txt file in the FT3 install directory. Here is an example of a rotated Equirectangular projection.

Note that the map is only rotated when you view it using this projection, but since FT3 export maps using the currently active projection, this shouldn't be a problem.

Obviously, since this is a rotation, it doesn't only swap east and west, but north and south will be swapped as well. If you want to mirror it instead of rotating it, I have no idea on how to accomplish that.

Projection 93, "Equirectangular Rotated 180"

Scale 1.0
Description "Equirectangular Rotated 180"

Segment "Equirectangular", 0, 0, 0, 0, 1, 0, 0
scale 1, 1
Offset 0, 0
Effective -180, 90, 180, -90
Rotate 180
EndSegment

EndProjection

JimP · February 2012

Yeah, swap all 4 compass directions.

Monsen · February 2012

Then the projection I posted should work fine for you. It is the standard equirectangular projection, just rotated 180 degrees. If you wish to base it in another projection, basically just swap out the word Equirectangular everywhere it appears with the correct name of the desired projection (As found in the FT3 projections dialog)

jslayton · February 2012

Assuming that you haven't done any editing, another option is to use the "Flip Vertical" or "Flip Horizontal" checkbox on the Fractal Function page of the World Settings property sheet.

JimP · February 2012

I don't see it in the list of projections under Map menu -> Change projection.

I did have ft3 closed when I edited the Projection.txt

JimP · February 2012

Ah, now I see it. I had to change the description to include the 'rotate 180' part.

Hmm. Mountains become valleys and the oceans become blue mountains. Changing the world seed doesn't make it look different.

Fixed it by changing the offset from 0,0 to -0,-0.

Sorry, that didn't fix it.

Monsen · February 2012

Strange, it shows up on my list. Just make sure you haven't another projection with the same number though.

Anyway, I guess jslaytons suggestion is probably easier anyway.

JimP · February 2012

Okay, I'll try that.

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in FT3, rotate a map ?

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