diff --git a/src/main/java/net/minecraft/server/BlockMinecartTrack.java b/src/main/java/net/minecraft/server/BlockMinecartTrack.java
new file mode 100644
index 0000000000..31cbbc79fd
--- /dev/null
+++ b/src/main/java/net/minecraft/server/BlockMinecartTrack.java
@@ -0,0 +1,265 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+public class BlockMinecartTrack extends Block {
+
+    private final boolean a;
+
+    public static final boolean g(World world, int i, int j, int k) {
+        int l = world.getTypeId(i, j, k);
+
+        return l == Block.RAILS.id || l == Block.GOLDEN_RAIL.id || l == Block.DETECTOR_RAIL.id;
+    }
+
+    public static final boolean d(int i) {
+        return i == Block.RAILS.id || i == Block.GOLDEN_RAIL.id || i == Block.DETECTOR_RAIL.id;
+    }
+
+    protected BlockMinecartTrack(int i, int j, boolean flag) {
+        super(i, j, Material.ORIENTABLE);
+        this.a = flag;
+        this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.125F, 1.0F);
+    }
+
+    public boolean h() {
+        return this.a;
+    }
+
+    public AxisAlignedBB e(World world, int i, int j, int k) {
+        return null;
+    }
+
+    public boolean a() {
+        return false;
+    }
+
+    public MovingObjectPosition a(World world, int i, int j, int k, Vec3D vec3d, Vec3D vec3d1) {
+        this.updateShape(world, i, j, k);
+        return super.a(world, i, j, k, vec3d, vec3d1);
+    }
+
+    public void updateShape(IBlockAccess iblockaccess, int i, int j, int k) {
+        int l = iblockaccess.getData(i, j, k);
+
+        if (l >= 2 && l <= 5) {
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.625F, 1.0F);
+        } else {
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.125F, 1.0F);
+        }
+    }
+
+    public int a(int i, int j) {
+        if (this.a) {
+            if (this.id == Block.GOLDEN_RAIL.id && (j & 8) == 0) {
+                return this.textureId - 16;
+            }
+        } else if (j >= 6) {
+            return this.textureId - 16;
+        }
+
+        return this.textureId;
+    }
+
+    public boolean b() {
+        return false;
+    }
+
+    public int c() {
+        return 9;
+    }
+
+    public int a(Random random) {
+        return 1;
+    }
+
+    public boolean canPlace(World world, int i, int j, int k) {
+        return world.e(i, j - 1, k);
+    }
+
+    public void onPlace(World world, int i, int j, int k) {
+        if (!world.isStatic) {
+            this.a(world, i, j, k, true);
+            if (this.id == Block.GOLDEN_RAIL.id) {
+                this.doPhysics(world, i, j, k, this.id);
+            }
+        }
+    }
+
+    public void doPhysics(World world, int i, int j, int k, int l) {
+        if (!world.isStatic) {
+            int i1 = world.getData(i, j, k);
+            int j1 = i1;
+
+            if (this.a) {
+                j1 = i1 & 7;
+            }
+
+            boolean flag = false;
+
+            if (!world.e(i, j - 1, k)) {
+                flag = true;
+            }
+
+            if (j1 == 2 && !world.e(i + 1, j, k)) {
+                flag = true;
+            }
+
+            if (j1 == 3 && !world.e(i - 1, j, k)) {
+                flag = true;
+            }
+
+            if (j1 == 4 && !world.e(i, j, k - 1)) {
+                flag = true;
+            }
+
+            if (j1 == 5 && !world.e(i, j, k + 1)) {
+                flag = true;
+            }
+
+            if (flag) {
+                this.b(world, i, j, k, world.getData(i, j, k), 0);
+                world.setTypeId(i, j, k, 0);
+            } else if (this.id == Block.GOLDEN_RAIL.id) {
+                boolean flag1 = world.isBlockIndirectlyPowered(i, j, k) || world.isBlockIndirectlyPowered(i, j + 1, k);
+
+                flag1 = flag1 || this.a(world, i, j, k, i1, true, 0) || this.a(world, i, j, k, i1, false, 0);
+                boolean flag2 = false;
+
+                if (flag1 && (i1 & 8) == 0) {
+                    world.setData(i, j, k, j1 | 8);
+                    flag2 = true;
+                } else if (!flag1 && (i1 & 8) != 0) {
+                    world.setData(i, j, k, j1);
+                    flag2 = true;
+                }
+
+                if (flag2) {
+                    world.applyPhysics(i, j - 1, k, this.id);
+                    if (j1 == 2 || j1 == 3 || j1 == 4 || j1 == 5) {
+                        world.applyPhysics(i, j + 1, k, this.id);
+                    }
+                }
+            } else if (l > 0 && Block.byId[l].isPowerSource() && !this.a && MinecartTrackLogic.a(new MinecartTrackLogic(this, world, i, j, k)) == 3) {
+                this.a(world, i, j, k, false);
+            }
+        }
+    }
+
+    private void a(World world, int i, int j, int k, boolean flag) {
+        if (!world.isStatic) {
+            (new MinecartTrackLogic(this, world, i, j, k)).a(world.isBlockIndirectlyPowered(i, j, k), flag);
+        }
+    }
+
+    private boolean a(World world, int i, int j, int k, int l, boolean flag, int i1) {
+        if (i1 >= 8) {
+            return false;
+        } else {
+            int j1 = l & 7;
+            boolean flag1 = true;
+
+            switch (j1) {
+            case 0:
+                if (flag) {
+                    ++k;
+                } else {
+                    --k;
+                }
+                break;
+
+            case 1:
+                if (flag) {
+                    --i;
+                } else {
+                    ++i;
+                }
+                break;
+
+            case 2:
+                if (flag) {
+                    --i;
+                } else {
+                    ++i;
+                    ++j;
+                    flag1 = false;
+                }
+
+                j1 = 1;
+                break;
+
+            case 3:
+                if (flag) {
+                    --i;
+                    ++j;
+                    flag1 = false;
+                } else {
+                    ++i;
+                }
+
+                j1 = 1;
+                break;
+
+            case 4:
+                if (flag) {
+                    ++k;
+                } else {
+                    --k;
+                    ++j;
+                    flag1 = false;
+                }
+
+                j1 = 0;
+                break;
+
+            case 5:
+                if (flag) {
+                    ++k;
+                    ++j;
+                    flag1 = false;
+                } else {
+                    --k;
+                }
+
+                j1 = 0;
+            }
+
+            return this.a(world, i, j, k, flag, i1, j1) ? true : flag1 && this.a(world, i, j - 1, k, flag, i1, j1);
+        }
+    }
+
+    private boolean a(World world, int i, int j, int k, boolean flag, int l, int i1) {
+        int j1 = world.getTypeId(i, j, k);
+
+        if (j1 == Block.GOLDEN_RAIL.id) {
+            int k1 = world.getData(i, j, k);
+            int l1 = k1 & 7;
+
+            if (i1 == 1 && (l1 == 0 || l1 == 4 || l1 == 5)) {
+                return false;
+            }
+
+            if (i1 == 0 && (l1 == 1 || l1 == 2 || l1 == 3)) {
+                return false;
+            }
+
+            if ((k1 & 8) != 0) {
+                if (!world.isBlockIndirectlyPowered(i, j, k) && !world.isBlockIndirectlyPowered(i, j + 1, k)) {
+                    return this.a(world, i, j, k, k1, flag, l + 1);
+                }
+
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    public int g() {
+        return 0;
+    }
+
+    static boolean a(BlockMinecartTrack blockminecarttrack) {
+        return blockminecarttrack.a;
+    }
+}
diff --git a/src/main/java/net/minecraft/server/MinecartTrackLogic.java b/src/main/java/net/minecraft/server/MinecartTrackLogic.java
new file mode 100644
index 0000000000..aa5d8a701f
--- /dev/null
+++ b/src/main/java/net/minecraft/server/MinecartTrackLogic.java
@@ -0,0 +1,359 @@
+package net.minecraft.server;
+
+import java.util.ArrayList;
+import java.util.List;
+
+class MinecartTrackLogic {
+
+    private World b;
+    private int c;
+    private int d;
+    private int e;
+    private final boolean f;
+    private List g;
+
+    final BlockMinecartTrack a;
+
+    public MinecartTrackLogic(BlockMinecartTrack blockminecarttrack, World world, int i, int j, int k) {
+        this.a = blockminecarttrack;
+        this.g = new ArrayList();
+        this.b = world;
+        this.c = i;
+        this.d = j;
+        this.e = k;
+        int l = world.getTypeId(i, j, k);
+        int i1 = world.getData(i, j, k);
+
+        if (BlockMinecartTrack.a((BlockMinecartTrack) Block.byId[l])) {
+            this.f = true;
+            i1 &= -9;
+        } else {
+            this.f = false;
+        }
+
+        this.a(i1);
+    }
+
+    private void a(int i) {
+        this.g.clear();
+        if (i == 0) {
+            this.g.add(new ChunkPosition(this.c, this.d, this.e - 1));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e + 1));
+        } else if (i == 1) {
+            this.g.add(new ChunkPosition(this.c - 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c + 1, this.d, this.e));
+        } else if (i == 2) {
+            this.g.add(new ChunkPosition(this.c - 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c + 1, this.d + 1, this.e));
+        } else if (i == 3) {
+            this.g.add(new ChunkPosition(this.c - 1, this.d + 1, this.e));
+            this.g.add(new ChunkPosition(this.c + 1, this.d, this.e));
+        } else if (i == 4) {
+            this.g.add(new ChunkPosition(this.c, this.d + 1, this.e - 1));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e + 1));
+        } else if (i == 5) {
+            this.g.add(new ChunkPosition(this.c, this.d, this.e - 1));
+            this.g.add(new ChunkPosition(this.c, this.d + 1, this.e + 1));
+        } else if (i == 6) {
+            this.g.add(new ChunkPosition(this.c + 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e + 1));
+        } else if (i == 7) {
+            this.g.add(new ChunkPosition(this.c - 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e + 1));
+        } else if (i == 8) {
+            this.g.add(new ChunkPosition(this.c - 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e - 1));
+        } else if (i == 9) {
+            this.g.add(new ChunkPosition(this.c + 1, this.d, this.e));
+            this.g.add(new ChunkPosition(this.c, this.d, this.e - 1));
+        }
+    }
+
+    private void a() {
+        for (int i = 0; i < this.g.size(); ++i) {
+            MinecartTrackLogic minecarttracklogic = this.a((ChunkPosition) this.g.get(i));
+
+            if (minecarttracklogic != null && minecarttracklogic.b(this)) {
+                this.g.set(i, new ChunkPosition(minecarttracklogic.c, minecarttracklogic.d, minecarttracklogic.e));
+            } else {
+                this.g.remove(i--);
+            }
+        }
+    }
+
+    private boolean a(int i, int j, int k) {
+        return BlockMinecartTrack.g(this.b, i, j, k) ? true : (BlockMinecartTrack.g(this.b, i, j + 1, k) ? true : BlockMinecartTrack.g(this.b, i, j - 1, k));
+    }
+
+    private MinecartTrackLogic a(ChunkPosition chunkposition) {
+        return BlockMinecartTrack.g(this.b, chunkposition.x, chunkposition.y, chunkposition.z) ? new MinecartTrackLogic(this.a, this.b, chunkposition.x, chunkposition.y, chunkposition.z) : (BlockMinecartTrack.g(this.b, chunkposition.x, chunkposition.y + 1, chunkposition.z) ? new MinecartTrackLogic(this.a, this.b, chunkposition.x, chunkposition.y + 1, chunkposition.z) : (BlockMinecartTrack.g(this.b, chunkposition.x, chunkposition.y - 1, chunkposition.z) ? new MinecartTrackLogic(this.a, this.b, chunkposition.x, chunkposition.y - 1, chunkposition.z) : null));
+    }
+
+    private boolean b(MinecartTrackLogic minecarttracklogic) {
+        for (int i = 0; i < this.g.size(); ++i) {
+            ChunkPosition chunkposition = (ChunkPosition) this.g.get(i);
+
+            if (chunkposition.x == minecarttracklogic.c && chunkposition.z == minecarttracklogic.e) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private boolean b(int i, int j, int k) {
+        for (int l = 0; l < this.g.size(); ++l) {
+            ChunkPosition chunkposition = (ChunkPosition) this.g.get(l);
+
+            if (chunkposition.x == i && chunkposition.z == k) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private int b() {
+        int i = 0;
+
+        if (this.a(this.c, this.d, this.e - 1)) {
+            ++i;
+        }
+
+        if (this.a(this.c, this.d, this.e + 1)) {
+            ++i;
+        }
+
+        if (this.a(this.c - 1, this.d, this.e)) {
+            ++i;
+        }
+
+        if (this.a(this.c + 1, this.d, this.e)) {
+            ++i;
+        }
+
+        return i;
+    }
+
+    private boolean c(MinecartTrackLogic minecarttracklogic) {
+        if (this.b(minecarttracklogic)) {
+            return true;
+        } else if (this.g.size() == 2) {
+            return false;
+        } else if (this.g.size() == 0) {
+            return true;
+        } else {
+            ChunkPosition chunkposition = (ChunkPosition) this.g.get(0);
+
+            return minecarttracklogic.d == this.d && chunkposition.y == this.d ? true : true;
+        }
+    }
+
+    private void d(MinecartTrackLogic minecarttracklogic) {
+        this.g.add(new ChunkPosition(minecarttracklogic.c, minecarttracklogic.d, minecarttracklogic.e));
+        boolean flag = this.b(this.c, this.d, this.e - 1);
+        boolean flag1 = this.b(this.c, this.d, this.e + 1);
+        boolean flag2 = this.b(this.c - 1, this.d, this.e);
+        boolean flag3 = this.b(this.c + 1, this.d, this.e);
+        byte b0 = -1;
+
+        if (flag || flag1) {
+            b0 = 0;
+        }
+
+        if (flag2 || flag3) {
+            b0 = 1;
+        }
+
+        if (!this.f) {
+            if (flag1 && flag3 && !flag && !flag2) {
+                b0 = 6;
+            }
+
+            if (flag1 && flag2 && !flag && !flag3) {
+                b0 = 7;
+            }
+
+            if (flag && flag2 && !flag1 && !flag3) {
+                b0 = 8;
+            }
+
+            if (flag && flag3 && !flag1 && !flag2) {
+                b0 = 9;
+            }
+        }
+
+        if (b0 == 0) {
+            if (BlockMinecartTrack.g(this.b, this.c, this.d + 1, this.e - 1)) {
+                b0 = 4;
+            }
+
+            if (BlockMinecartTrack.g(this.b, this.c, this.d + 1, this.e + 1)) {
+                b0 = 5;
+            }
+        }
+
+        if (b0 == 1) {
+            if (BlockMinecartTrack.g(this.b, this.c + 1, this.d + 1, this.e)) {
+                b0 = 2;
+            }
+
+            if (BlockMinecartTrack.g(this.b, this.c - 1, this.d + 1, this.e)) {
+                b0 = 3;
+            }
+        }
+
+        if (b0 < 0) {
+            b0 = 0;
+        }
+
+        int i = b0;
+
+        if (this.f) {
+            i = this.b.getData(this.c, this.d, this.e) & 8 | b0;
+        }
+
+        this.b.setData(this.c, this.d, this.e, i);
+    }
+
+    private boolean c(int i, int j, int k) {
+        MinecartTrackLogic minecarttracklogic = this.a(new ChunkPosition(i, j, k));
+
+        if (minecarttracklogic == null) {
+            return false;
+        } else {
+            minecarttracklogic.a();
+            return minecarttracklogic.c(this);
+        }
+    }
+
+    public void a(boolean flag, boolean flag1) {
+        boolean flag2 = this.c(this.c, this.d, this.e - 1);
+        boolean flag3 = this.c(this.c, this.d, this.e + 1);
+        boolean flag4 = this.c(this.c - 1, this.d, this.e);
+        boolean flag5 = this.c(this.c + 1, this.d, this.e);
+        byte b0 = -1;
+
+        if ((flag2 || flag3) && !flag4 && !flag5) {
+            b0 = 0;
+        }
+
+        if ((flag4 || flag5) && !flag2 && !flag3) {
+            b0 = 1;
+        }
+
+        if (!this.f) {
+            if (flag3 && flag5 && !flag2 && !flag4) {
+                b0 = 6;
+            }
+
+            if (flag3 && flag4 && !flag2 && !flag5) {
+                b0 = 7;
+            }
+
+            if (flag2 && flag4 && !flag3 && !flag5) {
+                b0 = 8;
+            }
+
+            if (flag2 && flag5 && !flag3 && !flag4) {
+                b0 = 9;
+            }
+        }
+
+        if (b0 == -1) {
+            if (flag2 || flag3) {
+                b0 = 0;
+            }
+
+            if (flag4 || flag5) {
+                b0 = 1;
+            }
+
+            if (!this.f) {
+                if (flag) {
+                    if (flag3 && flag5) {
+                        b0 = 6;
+                    }
+
+                    if (flag4 && flag3) {
+                        b0 = 7;
+                    }
+
+                    if (flag5 && flag2) {
+                        b0 = 9;
+                    }
+
+                    if (flag2 && flag4) {
+                        b0 = 8;
+                    }
+                } else {
+                    if (flag2 && flag4) {
+                        b0 = 8;
+                    }
+
+                    if (flag5 && flag2) {
+                        b0 = 9;
+                    }
+
+                    if (flag4 && flag3) {
+                        b0 = 7;
+                    }
+
+                    if (flag3 && flag5) {
+                        b0 = 6;
+                    }
+                }
+            }
+        }
+
+        if (b0 == 0) {
+            if (BlockMinecartTrack.g(this.b, this.c, this.d + 1, this.e - 1)) {
+                b0 = 4;
+            }
+
+            if (BlockMinecartTrack.g(this.b, this.c, this.d + 1, this.e + 1)) {
+                b0 = 5;
+            }
+        }
+
+        if (b0 == 1) {
+            if (BlockMinecartTrack.g(this.b, this.c + 1, this.d + 1, this.e)) {
+                b0 = 2;
+            }
+
+            if (BlockMinecartTrack.g(this.b, this.c - 1, this.d + 1, this.e)) {
+                b0 = 3;
+            }
+        }
+
+        if (b0 < 0) {
+            b0 = 0;
+        }
+
+        this.a(b0);
+        int i = b0;
+
+        if (this.f) {
+            i = this.b.getData(this.c, this.d, this.e) & 8 | b0;
+        }
+
+        if (flag1 || this.b.getData(this.c, this.d, this.e) != i) {
+            this.b.setData(this.c, this.d, this.e, i);
+
+            for (int j = 0; j < this.g.size(); ++j) {
+                MinecartTrackLogic minecarttracklogic = this.a((ChunkPosition) this.g.get(j));
+
+                if (minecarttracklogic != null) {
+                    minecarttracklogic.a();
+                    if (minecarttracklogic.c(this)) {
+                        minecarttracklogic.d(this);
+                    }
+                }
+            }
+        }
+    }
+
+    static int a(MinecartTrackLogic minecarttracklogic) {
+        return minecarttracklogic.b();
+    }
+}