Help with elevation code

[badosu]

Hello folks,

I want to recreate the slopes map from hidden cup on 0ad:

I am stuck on making the elevation to sides, which should be pretty simple though, I wondered if someone knows of any map that has a similar feature?

[asterix]

  On 16/05/2020 at 2:38 AM, badosu said:

Hello folks,

I want to recreate the slopes map from hidden cup on 0ad:

I am stuck on making the elevation to sides, which should be pretty simple though, I wondered if someone knows of any map that has a similar feature?

Expand  

well something could be found here https://trac.wildfiregames.com/search?q=elevation  https://trac.wildfiregames.com/wiki/Atlas_Manual_Starting  i will ping @FeXoR @vladislavbelov @elexis they could know more.

[badosu]

Cantabrian Highlands has a ramp, it seems `createPassage` can be used for making them. https://github.com/0ad/0ad/blob/master/binaries/data/mods/public/maps/random/cantabrian_highlands.js#L80-L90

[FeXoR]

Hi @badosu

For a random map I would suggest using an ElevationPainter for the two areas with differing heights and afterwards using the SmoothElevationPainter to generate the ramp (and you could use the random argument to add some noise to the slope). For the latter also add a cliff texture to be painted with the TerrainPainter and you are done

[badosu]

Awesome! Unfortunately it seems the SmoothElevationPainter tries to return elevation to base creating a kind of a hill instead of a ramp, this was my attempt using it:

 

  Reveal hidden contents

const heightTop = 20;
const lowlandsWidth = fractionToTiles(0.4);
const rampWidth = fractionToTiles(0.1);
const elevationPainter = new ElevationPainter(heightTop);
const rampPainters = [
  new TerrainPainter(tCliff),
  new SmoothElevationPainter(ELEVATION_SET, heightTop, 20),
  new TileClassPainter(clRamp)
];

createArea(
  new RectPlacer(new Vector2D(halfMapSize + lowlandsWidth / 2 + rampWidth, mapSize), new Vector2D(mapSize, 0)),
  elevationPainter);

createArea(
  new RectPlacer(new Vector2D(0, mapSize), new Vector2D(halfMapSize - lowlandsWidth / 2 - rampWidth, 0)),
  elevationPainter);

createArea(
  new RectPlacer(new Vector2D(halfMapSize + lowlandsWidth / 2, mapSize), new Vector2D(halfMapSize + lowlandsWidth / 2 + rampWidth, 0)),
  rampPainters
);

 

With createPassage I was able to obtain the desired result:

 

  Reveal hidden contents

const heightTop = 20;
const lowlandsWidth = fractionToTiles(0.4);
const rampWidth = fractionToTiles(0.1);
const elevationPainter = new ElevationPainter(heightTop);
const rampPainters = [
  new TerrainPainter(tCliff),
  new SmoothElevationPainter(ELEVATION_SET, heightTop, 20),
  new TileClassPainter(clRamp)
];

createArea(
  new RectPlacer(new Vector2D(halfMapSize + lowlandsWidth / 2 + rampWidth, mapSize), new Vector2D(mapSize, 0)),
  elevationPainter);

createArea(
  new RectPlacer(new Vector2D(0, mapSize), new Vector2D(halfMapSize - lowlandsWidth / 2 - rampWidth, 0)),
  elevationPainter);

createPassage({
  "start": new Vector2D(halfMapSize + lowlandsWidth / 2, halfMapSize),
  "end": new Vector2D(halfMapSize + rampWidth + lowlandsWidth / 2, halfMapSize),
  "startWidth": mapSize,
  "endWidth": mapSize,
  "smoothWidth": 2,
  "tileClass": clRamp,
  "terrain": tHill,
  "edgeTerrain": tCliff
});

createPassage({
  "start": new Vector2D(halfMapSize - lowlandsWidth / 2, halfMapSize),
  "end": new Vector2D(halfMapSize - rampWidth - lowlandsWidth / 2, halfMapSize),
  "startWidth": mapSize,
  "endWidth": mapSize,
  "smoothWidth": 2,
  "tileClass": clRamp,
  "terrain": tHill,
  "edgeTerrain": tCliff
});

 

 

[nani]

linear interpolation looks ugly

[badosu]

Yeah, sigmoidal might look better, or include noise.

 

But im mostly interested in functionality for now

[badosu]

Lul, does 0ad not allow water to be painted above a certain elevation? The original slopes map has sidelakes I wanted to recreate:

 

[badosu]

So, since it seems not possible to make elevated lake, I brought the land elevation down. If that happens though, everywhere gets flooded even if no tWater was placed.

Any ideas if what I want to do is feasible?

 

[Stan`]

One could create a 3D actor with obstruction to create a small lake uphill.  Currently there is only one water plane.

[badosu]

Well, for now I am using low elevation changes, unfortunately. It seems anything below 0 elevation it painted as water and anything above a certain elevation can't be painted as water. Is there any reason for this?

 

[nani]

You don't paint water, the water in 0ad is just a big plane under the terrain at a certain z position, you can change that z pos to make it look higher or lower

[alre]

and can you change that height locally?