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Old 04-28-12, 05:50 AM   #69
11Bravo
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Join Date: Dec 2006
Location: Error Triangle
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Let's compare our earth to planet SH3.

Earth is approximately a sphere. We plot our position using latitude lines and longitude lines. Latitudes are parallel to the equator. The distance between 1° of latitude on earth is the same everywhere, and is about 111 km.

Planet SH3 is a cylinder. We can plot our position using latitude and longitudes. The latitude lines are also parallel to the equator. The game editor reveals that 1° = 120 km everywhere.

So the distance between 50° N and 51° N is 111 km on earth.
And the distance between 50° N and 51° N in SH3 is 120 km.
There is no problem charting latitudes in the game.

Now we examine longitudes.

On earth the longitude lines converge at the poles. This causes the spacing between longitude lines to decrease as latitudes increase away from the equator.

So the distance between 0° W and 1°W is 111 km on earth at the equator.
And is 71.3 km at 50°N
And is 19.3 km at 80°N
And converges to zero at the poles.

On planet SH3 the distance between 0°W and 1°W is 120 km at the equator.
And is 120 km at 50°N
And is 120 km at 80°N
And stays constant at the poles.

We need to account for this difference in behavior between the two different shaped worlds.
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Last edited by 11Bravo; 04-28-12 at 07:00 AM.
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