Make the map a globe like in imperator rome

[Make Victoria 3]

In Imperator Rome the Map is properly shown as a globe and moving the camera west or east shows a clear rotation. It would be really nice if the same would be implemented for EU4. This would also address the unrealistic and bloated provinces in russia compared to close to the equator and hopefully fix the equally unrealistic and inflated movement speed closer to the poles. Simply asking the Imperator team how they did it is likely the easiest and best way to do it.

 

[Lord_Baltimore]

That seems like a big ask. But it would be nice if they updated the game to calculate distance as if the flat map were a globe. Of course this would require either changing the map projection or using some funny calculations in the Atlantic and Pacific oceans.

 

[Make Victoria 3]

That seems like a big ask. But it would be nice if they updated the game to calculate distance as if the flat map were a globe. Of course this would require either changing the map projection or using some funny calculations in the Atlantic and Pacific oceans.

The graphic part would indeed probably be a lot of work. But doing the movement correct (from the things i saw from the modding wiki though i did not go into much detail) is mostly about creating a formula to transform the (x,y) coordinates into (x,y,z) coordinates (it doesnt seem as if distances are saved as a fixed value) so instead of the squareroot of [(x1-x2)²+(y1-y2)²] you then have to calculate the squareroot of [(x1-x2)²+(y1-y2)²+(z1-z2)²]. The formula to transform the coordinates should only use schoolmathematics like sin and cos if one keeps it simple (unless i missed something).

 

[Lightwell]

In Imperator Rome the Map is properly shown as a globe and moving the camera west or east shows a clear rotation. It would be really nice if the same would be implemented for EU4. This would also address the unrealistic and bloated provinces in russia compared to close to the equator and hopefully fix the equally unrealistic and inflated movement speed closer to the poles. Simply asking the Imperator team how they did it is likely the easiest and best way to do it.

All for this, but I think that's more of an "EU5" thing. I'd also like to see the Sahara shrunk a bit to represent what things were like during the game's time period.

 

[Lord_Baltimore]

The graphic part would indeed probably be a lot of work. But doing the movement correct (from the things i saw from the modding wiki though i did not go into much detail) is mostly about creating a formula to transform the (x,y) coordinates into (x,y,z) coordinates (it doesnt seem as if distances are saved as a fixed value) so instead of the squareroot of [(x1-x2)²+(y1-y2)²] you then have to calculate the squareroot of [(x1-x2)²+(y1-y2)²+(z1-z2)²]. The formula to transform the coordinates should only use schoolmathematics like sin and cos if one keeps it simple (unless i missed something).

You actually need to adjust for the distortions in the map projection, then get the great circle distance. I believe the EUIV map is based on the Miller Projection (relevant formulas at the link). It looks complicated, but C++ can do this stuff pretty quickly. The problem is that in the EUIV map, the Americas are shifted several hundred miles north of their actual location in relation to the old world, so you can't use one consistent latitude across the whole map. It would be nice if they could make the map slightly larger and fix this issue.

 

[Make Victoria 3]

You actually need to adjust for the distortions in the map projection, then get the great circle distance. I believe the EUIV map is based on the Miller Projection (relevant formulas at the link). It looks complicated, but C++ can do this stuff pretty quickly. The problem is that in the EUIV map, the Americas are shifted several hundred miles north of their actual location in relation to the old world, so you can't use one consistent latitude across the whole map. It would be nice if they could make the map slightly larger and fix this issue.

With distances this short (relativly) i doubt the difference between great circle distance and the direct path (going through earth and whatever) would matter much, but performance wise its probably a lot worse. Though if we go into detail then we must also consider that the earth is not perfectly round but due to rotation the distance from the center of the earth to the equator is on average a bit higher than to the pole regions and so on (and lets just ignore mountain highs).

 

[Lord_Baltimore]

With distances this short (relativly) i doubt the difference between great circle distance and the direct path (going through earth and whatever) would matter much, but performance wise its probably a lot worse.

Except that in order to create your X/Y/Z coordinate system you would need to run the equations for the Miller Projection that I linked above, then convert the radian coordinates into x/y/z grid coordinates. You're not saving yourself any work that way.