How to make a complex relief correctly
- Thread starter Andrisel Space
- Start date
Altaïr
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Oh, you're trying to do your own terrain? Interesting.
There are several things to be careful about to avoid your problem.
The first thing to be aware of is that when the game generates the terrain, it maps the terrain you defined, and when it reaches the last point, it starts over with the first point. That way it repeats your terrain pattern until the planet is fully mapped. For this reason, there must be a continuity between the start and the end of your pattern, the same as if it was circular.
For example, if you have a look at the Perlin terrain file, you'll notice this at the beginning and at the end:
...
The first and the last point are exactly the same, precisely because of this.
Then the second point to be careful to is that to ensure continuity, the terrain pattern must be mapped an integer number of times around the planet. What you have to look at for this is the second parameter of the terrain formula in the planet file, here for Earth for the example:
This parameter (19030.8016... for the first one for example) is the length over which will be mapped one occurrence of your pattern. It's took equal to the planet perimeter divided by an integer.
In the case of Earth, the perimeter is:
P = 2×π×radius = 1979203.37... meters
If you check, you have:
19030.8016... = P / 104
2452.544... = P / 807
1319.468... = P / 1500
It means that the Perlin terrain is mapped 104, 807, and 1500 times over the planet in each case. If you follow the same principle you should have no problem.
There are several things to be careful about to avoid your problem.
The first thing to be aware of is that when the game generates the terrain, it maps the terrain you defined, and when it reaches the last point, it starts over with the first point. That way it repeats your terrain pattern until the planet is fully mapped. For this reason, there must be a continuity between the start and the end of your pattern, the same as if it was circular.
For example, if you have a look at the Perlin terrain file, you'll notice this at the beginning and at the end:
...
The first and the last point are exactly the same, precisely because of this.
Then the second point to be careful to is that to ensure continuity, the terrain pattern must be mapped an integer number of times around the planet. What you have to look at for this is the second parameter of the terrain formula in the planet file, here for Earth for the example:
This parameter (19030.8016... for the first one for example) is the length over which will be mapped one occurrence of your pattern. It's took equal to the planet perimeter divided by an integer.
In the case of Earth, the perimeter is:
P = 2×π×radius = 1979203.37... meters
If you check, you have:
19030.8016... = P / 104
2452.544... = P / 807
1319.468... = P / 1500
It means that the Perlin terrain is mapped 104, 807, and 1500 times over the planet in each case. If you follow the same principle you should have no problem.