1.14.4 Smooth Simplex noise generator

[matezz]

Hello!

I have a problem with terrain generation: I want to make terrain smooth as it is in some mods like RTG or BiomeBundle, for example:

So I have succesfully implemented Open Simplex Noise and... terrain changed: now it looks smoother but there are sharp mountains, only minecraft "flying terrain" is eliminated. And also its super flat in some places.

Here's my code:

Spoiler

private double useNoises(int chunkX, int chunkY, int chunkZ, double coordinateScale, double heightScale, double depthSize, double unk1, Biome b) {
    double d0 = 0.0D;
    double d1 = 0.0D;
    double noiseY = 0.0D;
    double modifier = 1D;


    for (int i = 0; i < 16; ++i) {
        double d4 = SimplexOctavesGenerator.maintainPrecision((double) chunkX * coordinateScale * modifier);
        double d5 = SimplexOctavesGenerator.maintainPrecision((double) chunkY * heightScale * modifier);
        double d6 = SimplexOctavesGenerator.maintainPrecision((double) chunkZ * coordinateScale * modifier);
        d0 += this.openSimplex.eval(d4, d5, d6) * modifier;
        d1 += this.openSimplex.eval(d4, d5, d6) * modifier;
        noiseY += this.openSimplex.eval(SimplexOctavesGenerator.maintainPrecision((double) chunkX * depthSize), SimplexOctavesGenerator.maintainPrecision((double) chunkY * unk1), SimplexOctavesGenerator.maintainPrecision((double) chunkZ * depthSize)) * modifier;

        if (i < 8) {
        }

        modifier /= 8.0D;

    }

    double lowerLimitScale = 512.0D;
    double upperLimitScale = 512.0D;
    double slide = 1D;

    double result = MathHelper.clampedLerp(d0 / lowerLimitScale, d1 / upperLimitScale, (noiseY) * slide);


    return result;

}

Original code is in net.minecraft.world.gen.NoiseChunkGenerator:71 called func_222552_a

 

And also another question is what is an equivalent of "heighVariation" in 1.12.2? In 1.14 there is only a depth variable, but I want to make terrain more bellied or something in some biomes.

 

Thanks for help. I really need this terrain!

 

 

[DavidM]

You could manually apply bilinear interpolation to the terrain to smoothen out sharp mountains.

[matezz]

Thanks for quick reply.

So how to implement it to Minecraft? Have you any code to make it or any tutorial?

Thanks

[DavidM]

Basically the concept is to make blocks between sharp chunks take a medium value between the two sharp chunk height.

Check out https://en.wikipedia.org/wiki/Bilinear_interpolation.

There is also this example in applying bilinear interpolation to images https://rosettacode.org/wiki/Bilinear_interpolation.

[matezz]

Okay, I will try to do something but should I use 2D noise or 3D noise?

And why "scale" value in BiomeBuilder not works?

Spoiler

public final class WNDuneSea extends WNBiome {
    public WNDuneSea() {
        super("dune_sea",(new WNBiomeBuilder()).surfaceBuilder(SurfaceBuilder.DEFAULT, SurfaceBuilder.SAND_SAND_GRAVEL_CONFIG).precipitation(Biome.RainType.NONE).category(Biome.Category.DESERT).depth(2.6F).scale(6F).temperature(2.0F).downfall(0.0F).waterColor(4159204).waterFogColor(329011).parent((String)null));

There is depth 2.6F and scale 6F and the terrain is flat, not hilly

Edited August 13, 2019 by matezz