internal static void addBump(Vector3 center, float graphSize, List <Coord> coords, float radius, float verticalScale, float x, float y)
{
Coord initial = ElevationUtils.findClosestCoord(x, y, coords);
float radialFactor = 1f - Vector3.Distance(center, initial.toVector3()) * 2 / graphSize;
ElevationUtils.elevate(initial, coords, radius, verticalScale * radialFactor, 2);
}
public ElevationHelper erode(List <Corner> corners)
{
updateCornerElevations(corners);
ElevationUtils.calculateDownslopes(corners);
ElevationUtils.calculateMoisture(corners);
ElevationFunctions.performWaterErosion(corners);
return(this);
}
public ElevationHelper updateCornerElevations(List <Corner> corners)
{
if (!cornersUpToDate)
{
ElevationUtils.assignCornerElevations(corners);
cornersUpToDate = true;
}
return(this);
}
internal static void addNoise(List <Coord> coords, RandomProvider random, float horizontalScale, float verticalScale)
{
float offset = random.getFloat();
foreach (Coord coord in coords)
{
var perlin = ElevationUtils.getPerlin(offset,
horizontalScale,
coord.x,
coord.y);
coord.setElevation(coord.elevation + perlin * verticalScale);
}
}
/**
* Applys perlin noise across the map with a radial bias, maximum strength at the center, 0 at map width.
* Changing the horizonal scale should change the frequency of the effect. Smaller numbers = less detailed.
* Change the vertical scale to change the strength of the effect.
*/
internal static void addRadialWeightedNoise(Vector3 center, float radius, List <Coord> coords, RandomProvider random, float horizontalScale, float verticalScale)
{
float offset = random.getFloat();
foreach (Coord coord in coords)
{
var perlin = ElevationUtils.getPerlin(
offset,
horizontalScale,
coord.x / radius,
coord.y / radius
);
float distance = Vector3.Distance(center, coord.toVector3());
coord.setElevation(Mathf.Lerp(coord.elevation, coord.elevation + perlin * verticalScale, 1 - Mathf.Clamp01(distance / radius)));
}
}
/**
* radius, x and y are normalised to map size.
*/
public ElevationHelper plateau(float x, float y, float height, float radius)
{
PerlinRadialShape shape = new PerlinRadialShape(random, radius, 1, x * size, y * size);
Coord centralCoord = ElevationUtils.findClosestCoord(x * size, y * size, coords);
float plateauHeight = centralCoord.elevation + height;
foreach (var coord in coords)
{
if (shape.isInside(coord.x, coord.y))
{
float heightMod = (centralCoord.elevation - coord.elevation) * 0.1f;
coord.setElevation(plateauHeight + heightMod);
}
}
return(this);
}
public ElevationHelper crater(float x, float y, float radius)
{
Coord origin = ElevationUtils.findClosestCoord(x * size, y * size, coords);
float originDepth = radius * 0.5f;
float wallHeight = radius * 0.25f;
float totalHeightDelta = originDepth + wallHeight;
float wallFalloff = radius + radius * 0.25f;
foreach (var coord in coords)
{
float distance = Vector3.Distance(origin.toVector3(), coord.toVector3());
if (distance < radius)
{
float factor = distance / radius;
coord.changeElevationBy(totalHeightDelta * (factor * factor * factor) - originDepth);
}
else if (distance < wallFalloff)
{
float factor = (distance - radius) / (wallFalloff - radius);
coord.changeElevationBy(wallHeight * (1 - (factor * factor)));
}
}
return(this);
}
internal static void addCone(List <Coord> coords, float radius, float x, float y, float verticalScale)
{
ElevationUtils.elevate(coords, radius, x, y, verticalScale, 1);
}