Terrain generation bugfix (will also be in Mojang 1.3)

1 files changed, 567 insertions, 0 deletions

diff --git a/src/main/java/net/minecraft/server/ChunkProviderGenerate.java b/src/main/java/net/minecraft/server/ChunkProviderGenerate.java
new file mode 100644
index 00000000..a1987ce3
--- /dev/null
+++ b/src/main/java/net/minecraft/server/ChunkProviderGenerate.java
@@ -0,0 +1,567 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+public class ChunkProviderGenerate implements IChunkProvider {
+
+    private Random j;
+    private NoiseGeneratorOctaves k;
+    private NoiseGeneratorOctaves l;
+    private NoiseGeneratorOctaves m;
+    private NoiseGeneratorOctaves n;
+    private NoiseGeneratorOctaves o;
+    public NoiseGeneratorOctaves a;
+    public NoiseGeneratorOctaves b;
+    public NoiseGeneratorOctaves c;
+    private World p;
+    private double[] q;
+    private double[] r = new double[256];
+    private double[] s = new double[256];
+    private double[] t = new double[256];
+    private MapGenBase u = new MapGenCaves();
+    private BiomeBase[] v;
+    double[] d;
+    double[] e;
+    double[] f;
+    double[] g;
+    double[] h;
+    int[][] i = new int[32][32];
+    private double[] w;
+
+    public ChunkProviderGenerate(World world, long i) {
+        this.p = world;
+        this.j = new Random(i);
+        this.k = new NoiseGeneratorOctaves(this.j, 16);
+        this.l = new NoiseGeneratorOctaves(this.j, 16);
+        this.m = new NoiseGeneratorOctaves(this.j, 8);
+        this.n = new NoiseGeneratorOctaves(this.j, 4);
+        this.o = new NoiseGeneratorOctaves(this.j, 4);
+        this.a = new NoiseGeneratorOctaves(this.j, 10);
+        this.b = new NoiseGeneratorOctaves(this.j, 16);
+        this.c = new NoiseGeneratorOctaves(this.j, 8);
+    }
+
+    public void a(int i, int j, byte[] abyte, BiomeBase[] abiomebase, double[] adouble) {
+        byte b0 = 4;
+        byte b1 = 64;
+        int k = b0 + 1;
+        byte b2 = 17;
+        int l = b0 + 1;
+
+        this.q = this.a(this.q, i * b0, 0, j * b0, k, b2, l);
+
+        for (int i1 = 0; i1 < b0; ++i1) {
+            for (int j1 = 0; j1 < b0; ++j1) {
+                for (int k1 = 0; k1 < 16; ++k1) {
+                    double d0 = 0.125D;
+                    double d1 = this.q[((i1 + 0) * l + j1 + 0) * b2 + k1 + 0];
+                    double d2 = this.q[((i1 + 0) * l + j1 + 1) * b2 + k1 + 0];
+                    double d3 = this.q[((i1 + 1) * l + j1 + 0) * b2 + k1 + 0];
+                    double d4 = this.q[((i1 + 1) * l + j1 + 1) * b2 + k1 + 0];
+                    double d5 = (this.q[((i1 + 0) * l + j1 + 0) * b2 + k1 + 1] - d1) * d0;
+                    double d6 = (this.q[((i1 + 0) * l + j1 + 1) * b2 + k1 + 1] - d2) * d0;
+                    double d7 = (this.q[((i1 + 1) * l + j1 + 0) * b2 + k1 + 1] - d3) * d0;
+                    double d8 = (this.q[((i1 + 1) * l + j1 + 1) * b2 + k1 + 1] - d4) * d0;
+
+                    for (int l1 = 0; l1 < 8; ++l1) {
+                        double d9 = 0.25D;
+                        double d10 = d1;
+                        double d11 = d2;
+                        double d12 = (d3 - d1) * d9;
+                        double d13 = (d4 - d2) * d9;
+
+                        for (int i2 = 0; i2 < 4; ++i2) {
+                            int j2 = i2 + i1 * 4 << 11 | 0 + j1 * 4 << 7 | k1 * 8 + l1;
+                            short short1 = 128;
+                            double d14 = 0.25D;
+                            double d15 = d10;
+                            double d16 = (d11 - d10) * d14;
+
+                            for (int k2 = 0; k2 < 4; ++k2) {
+                                double d17 = adouble[(i1 * 4 + i2) * 16 + j1 * 4 + k2];
+                                int l2 = 0;
+
+                                if (k1 * 8 + l1 < b1) {
+                                    if (d17 < 0.5D && k1 * 8 + l1 >= b1 - 1) {
+                                        l2 = Block.ICE.id;
+                                    } else {
+                                        l2 = Block.STATIONARY_WATER.id;
+                                    }
+                                }
+
+                                if (d15 > 0.0D) {
+                                    l2 = Block.STONE.id;
+                                }
+
+                                abyte[j2] = (byte) l2;
+                                j2 += short1;
+                                d15 += d16;
+                            }
+
+                            d10 += d12;
+                            d11 += d13;
+                        }
+
+                        d1 += d5;
+                        d2 += d6;
+                        d3 += d7;
+                        d4 += d8;
+                    }
+                }
+            }
+        }
+    }
+
+    public void a(int i, int j, byte[] abyte, BiomeBase[] abiomebase) {
+        byte b0 = 64;
+        double d0 = 0.03125D;
+
+        this.r = this.n.a(this.r, (double) (i * 16), (double) (j * 16), 0.0D, 16, 16, 1, d0, d0, 1.0D);
+        this.s = this.n.a(this.s, (double) (i * 16), 109.0134D, (double) (j * 16), 16, 1, 16, d0, 1.0D, d0); // CraftBukkit -- i & j swapped.
+        this.t = this.o.a(this.t, (double) (i * 16), (double) (j * 16), 0.0D, 16, 16, 1, d0 * 2.0D, d0 * 2.0D, d0 * 2.0D);
+
+        for (int k = 0; k < 16; ++k) {
+            for (int l = 0; l < 16; ++l) {
+                BiomeBase biomebase = abiomebase[k + l * 16];
+                boolean flag = this.r[k + l * 16] + this.j.nextDouble() * 0.2D > 0.0D;
+                boolean flag1 = this.s[k + l * 16] + this.j.nextDouble() * 0.2D > 3.0D;
+                int i1 = (int) (this.t[k + l * 16] / 3.0D + 3.0D + this.j.nextDouble() * 0.25D);
+                int j1 = -1;
+                byte b1 = biomebase.o;
+                byte b2 = biomebase.p;
+
+                for (int k1 = 127; k1 >= 0; --k1) {
+                    int l1 = (k + l * 16) * 128 + k1; // CraftBukkit (k*16+l) -> (k+l*16)
+
+                    if (k1 <= 0 + this.j.nextInt(5)) {
+                        abyte[l1] = (byte) Block.BEDROCK.id;
+                    } else {
+                        byte b3 = abyte[l1];
+
+                        if (b3 == 0) {
+                            j1 = -1;
+                        } else if (b3 == Block.STONE.id) {
+                            if (j1 == -1) {
+                                if (i1 <= 0) {
+                                    b1 = 0;
+                                    b2 = (byte) Block.STONE.id;
+                                } else if (k1 >= b0 - 4 && k1 <= b0 + 1) {
+                                    b1 = biomebase.o;
+                                    b2 = biomebase.p;
+                                    if (flag1) {
+                                        b1 = 0;
+                                    }
+
+                                    if (flag1) {
+                                        b2 = (byte) Block.GRAVEL.id;
+                                    }
+
+                                    if (flag) {
+                                        b1 = (byte) Block.SAND.id;
+                                    }
+
+                                    if (flag) {
+                                        b2 = (byte) Block.SAND.id;
+                                    }
+                                }
+
+                                if (k1 < b0 && b1 == 0) {
+                                    b1 = (byte) Block.STATIONARY_WATER.id;
+                                }
+
+                                j1 = i1;
+                                if (k1 >= b0 - 1) {
+                                    abyte[l1] = b1;
+                                } else {
+                                    abyte[l1] = b2;
+                                }
+                            } else if (j1 > 0) {
+                                --j1;
+                                abyte[l1] = b2;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public Chunk b(int i, int j) {
+        this.j.setSeed((long) i * 341873128712L + (long) j * 132897987541L);
+        byte[] abyte = new byte['\u8000'];
+        Chunk chunk = new Chunk(this.p, abyte, i, j);
+
+        this.v = this.p.a().a(this.v, i * 16, j * 16, 16, 16);
+        double[] adouble = this.p.a().a;
+
+        this.a(i, j, abyte, this.v, adouble);
+        this.a(i, j, abyte, this.v);
+        this.u.a(this, this.p, i, j, abyte);
+        chunk.b();
+        return chunk;
+    }
+
+    private double[] a(double[] adouble, int i, int j, int k, int l, int i1, int j1) {
+        if (adouble == null) {
+            adouble = new double[l * i1 * j1];
+        }
+
+        double d0 = 684.412D;
+        double d1 = 684.412D;
+        double[] adouble1 = this.p.a().a;
+        double[] adouble2 = this.p.a().b;
+
+        this.g = this.a.a(this.g, i, k, l, j1, 1.121D, 1.121D, 0.5D);
+        this.h = this.b.a(this.h, i, k, l, j1, 200.0D, 200.0D, 0.5D);
+        this.d = this.m.a(this.d, (double) i, (double) j, (double) k, l, i1, j1, d0 / 80.0D, d1 / 160.0D, d0 / 80.0D);
+        this.e = this.k.a(this.e, (double) i, (double) j, (double) k, l, i1, j1, d0, d1, d0);
+        this.f = this.l.a(this.f, (double) i, (double) j, (double) k, l, i1, j1, d0, d1, d0);
+        int k1 = 0;
+        int l1 = 0;
+        int i2 = 16 / l;
+
+        for (int j2 = 0; j2 < l; ++j2) {
+            int k2 = j2 * i2 + i2 / 2;
+
+            for (int l2 = 0; l2 < j1; ++l2) {
+                int i3 = l2 * i2 + i2 / 2;
+                double d2 = adouble1[k2 * 16 + i3];
+                double d3 = adouble2[k2 * 16 + i3] * d2;
+                double d4 = 1.0D - d3;
+
+                d4 *= d4;
+                d4 *= d4;
+                d4 = 1.0D - d4;
+                double d5 = (this.g[l1] + 256.0D) / 512.0D;
+
+                d5 *= d4;
+                if (d5 > 1.0D) {
+                    d5 = 1.0D;
+                }
+
+                double d6 = this.h[l1] / 8000.0D;
+
+                if (d6 < 0.0D) {
+                    d6 = -d6 * 0.3D;
+                }
+
+                d6 = d6 * 3.0D - 2.0D;
+                if (d6 < 0.0D) {
+                    d6 /= 2.0D;
+                    if (d6 < -1.0D) {
+                        d6 = -1.0D;
+                    }
+
+                    d6 /= 1.4D;
+                    d6 /= 2.0D;
+                    d5 = 0.0D;
+                } else {
+                    if (d6 > 1.0D) {
+                        d6 = 1.0D;
+                    }
+
+                    d6 /= 8.0D;
+                }
+
+                if (d5 < 0.0D) {
+                    d5 = 0.0D;
+                }
+
+                d5 += 0.5D;
+                d6 = d6 * (double) i1 / 16.0D;
+                double d7 = (double) i1 / 2.0D + d6 * 4.0D;
+
+                ++l1;
+
+                for (int j3 = 0; j3 < i1; ++j3) {
+                    double d8 = 0.0D;
+                    double d9 = ((double) j3 - d7) * 12.0D / d5;
+
+                    if (d9 < 0.0D) {
+                        d9 *= 4.0D;
+                    }
+
+                    double d10 = this.e[k1] / 512.0D;
+                    double d11 = this.f[k1] / 512.0D;
+                    double d12 = (this.d[k1] / 10.0D + 1.0D) / 2.0D;
+
+                    if (d12 < 0.0D) {
+                        d8 = d10;
+                    } else if (d12 > 1.0D) {
+                        d8 = d11;
+                    } else {
+                        d8 = d10 + (d11 - d10) * d12;
+                    }
+
+                    d8 -= d9;
+                    if (j3 > i1 - 4) {
+                        double d13 = (double) ((float) (j3 - (i1 - 4)) / 3.0F);
+
+                        d8 = d8 * (1.0D - d13) + -10.0D * d13;
+                    }
+
+                    adouble[k1] = d8;
+                    ++k1;
+                }
+            }
+        }
+
+        return adouble;
+    }
+
+    public boolean a(int i, int j) {
+        return true;
+    }
+
+    public void a(IChunkProvider ichunkprovider, int i, int j) {
+        BlockSand.a = true;
+        int k = i * 16;
+        int l = j * 16;
+        BiomeBase biomebase = this.p.a().a(k + 16, l + 16);
+
+        this.j.setSeed(this.p.u);
+        long i1 = this.j.nextLong() / 2L * 2L + 1L;
+        long j1 = this.j.nextLong() / 2L * 2L + 1L;
+
+        this.j.setSeed((long) i * i1 + (long) j * j1 ^ this.p.u);
+        double d0 = 0.25D;
+        int k1;
+        int l1;
+        int i2;
+
+        if (this.j.nextInt(4) == 0) {
+            k1 = k + this.j.nextInt(16) + 8;
+            l1 = this.j.nextInt(128);
+            i2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenLakes(Block.STATIONARY_WATER.id)).a(this.p, this.j, k1, l1, i2);
+        }
+
+        if (this.j.nextInt(8) == 0) {
+            k1 = k + this.j.nextInt(16) + 8;
+            l1 = this.j.nextInt(this.j.nextInt(120) + 8);
+            i2 = l + this.j.nextInt(16) + 8;
+            if (l1 < 64 || this.j.nextInt(10) == 0) {
+                (new WorldGenLakes(Block.STATIONARY_LAVA.id)).a(this.p, this.j, k1, l1, i2);
+            }
+        }
+
+        int j2;
+
+        for (k1 = 0; k1 < 8; ++k1) {
+            l1 = k + this.j.nextInt(16) + 8;
+            i2 = this.j.nextInt(128);
+            j2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenDungeons()).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 10; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(128);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenClay(32)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 20; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(128);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.DIRT.id, 32)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 10; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(128);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.GRAVEL.id, 32)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 20; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(128);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.COAL_ORE.id, 16)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 20; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(64);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.IRON_ORE.id, 8)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 2; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(32);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.GOLD_ORE.id, 8)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 8; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(16);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.REDSTONE_ORE.id, 7)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 1; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(16);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.DIAMOND_ORE.id, 7)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        for (k1 = 0; k1 < 1; ++k1) {
+            l1 = k + this.j.nextInt(16);
+            i2 = this.j.nextInt(16) + this.j.nextInt(16);
+            j2 = l + this.j.nextInt(16);
+            (new WorldGenMinable(Block.LAPIS_ORE.id, 6)).a(this.p, this.j, l1, i2, j2);
+        }
+
+        d0 = 0.5D;
+        k1 = (int) ((this.c.a((double) k * d0, (double) l * d0) / 8.0D + this.j.nextDouble() * 4.0D + 4.0D) / 3.0D);
+        l1 = 0;
+        if (this.j.nextInt(10) == 0) {
+            ++l1;
+        }
+
+        if (biomebase == BiomeBase.FOREST) {
+            l1 += k1 + 5;
+        }
+
+        if (biomebase == BiomeBase.RAINFOREST) {
+            l1 += k1 + 5;
+        }
+
+        if (biomebase == BiomeBase.SEASONAL_FOREST) {
+            l1 += k1 + 2;
+        }
+
+        if (biomebase == BiomeBase.TAIGA) {
+            l1 += k1 + 5;
+        }
+
+        if (biomebase == BiomeBase.DESERT) {
+            l1 -= 20;
+        }
+
+        if (biomebase == BiomeBase.TUNDRA) {
+            l1 -= 20;
+        }
+
+        if (biomebase == BiomeBase.PLAINS) {
+            l1 -= 20;
+        }
+
+        int k2;
+
+        for (i2 = 0; i2 < l1; ++i2) {
+            j2 = k + this.j.nextInt(16) + 8;
+            k2 = l + this.j.nextInt(16) + 8;
+            WorldGenerator worldgenerator = biomebase.a(this.j);
+
+            worldgenerator.a(1.0D, 1.0D, 1.0D);
+            worldgenerator.a(this.p, this.j, j2, this.p.d(j2, k2), k2);
+        }
+
+        int l2;
+
+        for (i2 = 0; i2 < 2; ++i2) {
+            j2 = k + this.j.nextInt(16) + 8;
+            k2 = this.j.nextInt(128);
+            l2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenFlowers(Block.YELLOW_FLOWER.id)).a(this.p, this.j, j2, k2, l2);
+        }
+
+        if (this.j.nextInt(2) == 0) {
+            i2 = k + this.j.nextInt(16) + 8;
+            j2 = this.j.nextInt(128);
+            k2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenFlowers(Block.RED_ROSE.id)).a(this.p, this.j, i2, j2, k2);
+        }
+
+        if (this.j.nextInt(4) == 0) {
+            i2 = k + this.j.nextInt(16) + 8;
+            j2 = this.j.nextInt(128);
+            k2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenFlowers(Block.BROWN_MUSHROOM.id)).a(this.p, this.j, i2, j2, k2);
+        }
+
+        if (this.j.nextInt(8) == 0) {
+            i2 = k + this.j.nextInt(16) + 8;
+            j2 = this.j.nextInt(128);
+            k2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenFlowers(Block.RED_MUSHROOM.id)).a(this.p, this.j, i2, j2, k2);
+        }
+
+        for (i2 = 0; i2 < 10; ++i2) {
+            j2 = k + this.j.nextInt(16) + 8;
+            k2 = this.j.nextInt(128);
+            l2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenReed()).a(this.p, this.j, j2, k2, l2);
+        }
+
+        if (this.j.nextInt(32) == 0) {
+            i2 = k + this.j.nextInt(16) + 8;
+            j2 = this.j.nextInt(128);
+            k2 = l + this.j.nextInt(16) + 8;
+            (new WorldGenPumpkin()).a(this.p, this.j, i2, j2, k2);
+        }
+
+        i2 = 0;
+        if (biomebase == BiomeBase.DESERT) {
+            i2 += 10;
+        }
+
+        int i3;
+
+        for (j2 = 0; j2 < i2; ++j2) {
+            k2 = k + this.j.nextInt(16) + 8;
+            l2 = this.j.nextInt(128);
+            i3 = l + this.j.nextInt(16) + 8;
+            (new WorldGenCactus()).a(this.p, this.j, k2, l2, i3);
+        }
+
+        for (j2 = 0; j2 < 50; ++j2) {
+            k2 = k + this.j.nextInt(16) + 8;
+            l2 = this.j.nextInt(this.j.nextInt(120) + 8);
+            i3 = l + this.j.nextInt(16) + 8;
+            (new WorldGenLiquids(Block.WATER.id)).a(this.p, this.j, k2, l2, i3);
+        }
+
+        for (j2 = 0; j2 < 20; ++j2) {
+            k2 = k + this.j.nextInt(16) + 8;
+            l2 = this.j.nextInt(this.j.nextInt(this.j.nextInt(112) + 8) + 8);
+            i3 = l + this.j.nextInt(16) + 8;
+            (new WorldGenLiquids(Block.LAVA.id)).a(this.p, this.j, k2, l2, i3);
+        }
+
+        this.w = this.p.a().a(this.w, k + 8, l + 8, 16, 16);
+
+        for (j2 = k + 8; j2 < k + 8 + 16; ++j2) {
+            for (k2 = l + 8; k2 < l + 8 + 16; ++k2) {
+                l2 = j2 - (k + 8);
+                i3 = k2 - (l + 8);
+                int j3 = this.p.e(j2, k2);
+                double d1 = this.w[l2 * 16 + i3] - (double) (j3 - 64) / 64.0D * 0.3D;
+
+                if (d1 < 0.5D && j3 > 0 && j3 < 128 && this.p.isEmpty(j2, j3, k2) && this.p.getMaterial(j2, j3 - 1, k2).isSolid() && this.p.getMaterial(j2, j3 - 1, k2) != Material.ICE) {
+                    this.p.e(j2, j3, k2, Block.SNOW.id);
+                }
+            }
+        }
+
+        BlockSand.a = false;
+    }
+
+    public boolean a(boolean flag, IProgressUpdate iprogressupdate) {
+        return true;
+    }
+
+    public boolean a() {
+        return false;
+    }
+
+    public boolean b() {
+        return true;
+    }
+}