SurfaceMesa.java

package rtg.world.gen.surface;

import java.util.Random;

import net.minecraft.block.Block;
import net.minecraft.init.Blocks;
import net.minecraft.world.biome.Biome;
import net.minecraft.world.chunk.ChunkPrimer;

import rtg.api.util.noise.OpenSimplexNoise;
import rtg.api.world.RTGWorld;
import rtg.api.config.BiomeConfig;
import rtg.util.CanyonColour;
import rtg.api.util.CliffCalculator;

public class SurfaceMesa extends SurfaceBase {

    private int[] claycolor = new int[100];

    public SurfaceMesa(BiomeConfig config, Block top, byte topByte, Block fill, byte fillByte) {

        super(config, top, fill);

        int[] c = new int[]{1, 8, 0};
        OpenSimplexNoise simplex = new OpenSimplexNoise(2L);

        float n;
        for (int i = 0; i < 100; i++) {
            n = simplex.noise1(i / 3f) * 3f + simplex.noise1(i / 1f) * 0.3f + 1.5f;
            n = n >= 3f ? 2.9f : n < 0f ? 0f : n;
            claycolor[i] = c[(int) n];
        }
    }

    public byte getClayColorForHeight(int k) {

        k -= 60;
        k = k < 0 ? 0 : k > 99 ? 99 : k;
        return (byte) claycolor[k];
    }

    @Override
    public void paintTerrain(ChunkPrimer primer, int i, int j, int x, int z, int depth, RTGWorld rtgWorld, float[] noise, float river, Biome[] base) {

        Random rand = rtgWorld.rand;
        float c = CliffCalculator.calc(x, z, noise);
        boolean cliff = c > 1.3f ? true : false;

        for (int k = 255; k > -1; k--) {
            Block b = primer.getBlockState(x, k, z).getBlock();
            if (b == Blocks.AIR) {
                depth = -1;
            }
            else if (b == Blocks.STONE) {
                depth++;

                if (depth > -1 && depth < 12) {
                    if (cliff) {
                        primer.setBlockState(x, k, z, CanyonColour.MESA.getBlockForHeight(i, k, j));
                    }
                    else {
                        if (depth > 4) {
                            primer.setBlockState(x, k, z, CanyonColour.MESA.getBlockForHeight(i, k, j));
                        }
                        else if (k > 77) {
                            if (rand.nextInt(5) == 0) {
                                primer.setBlockState(x, k, z, Blocks.DIRT.getDefaultState());
                            }
                            else {
                                if (depth == 0) {
                                    primer.setBlockState(x, k, z, topBlock);
                                }
                                else {
                                    primer.setBlockState(x, k, z, fillerBlock);
                                }
                            }
                        }
                        else if (k < 69) {
                            primer.setBlockState(x, k, z, Blocks.DIRT.getDefaultState());
                        }
                        else if (k < 78) {
                            if (depth == 0) {
                                if (k < 72 && rand.nextInt(k - 69 + 1) == 0) {
                                    primer.setBlockState(x, k, z, Blocks.DIRT.getDefaultState());
                                }
                                else if (rand.nextInt(5) == 0) {
                                    primer.setBlockState(x, k, z, Blocks.DIRT.getDefaultState());
                                }
                                else {
                                    primer.setBlockState(x, k, z, topBlock);
                                }
                            }
                            else {
                                primer.setBlockState(x, k, z, fillerBlock);
                            }
                        }
                        else {
                            if (depth == 0) {
                                primer.setBlockState(x, k, z, topBlock);
                            }
                            else {
                                primer.setBlockState(x, k, z, fillerBlock);
                            }
                        }
                    }
                }
                else if (k > 63) {
                    primer.setBlockState(x, k, z, CanyonColour.MESA.getBlockForHeight(i, k, j));
                }
            }
        }
    }
}