added own WorldGenMinable to search for nearby blocks instead ob replacing them

src/main/java/items/BasicItem.java

@@ -1,14 +1,6 @@
 package items;
 
-import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
-import net.minecraft.util.ActionResult;
-import net.minecraft.util.EnumActionResult;
-import net.minecraft.util.EnumFacing;
-import net.minecraft.util.EnumHand;
-import net.minecraft.util.math.BlockPos;
-import net.minecraft.world.World;
 
 public class BasicItem extends Item {
 
@@ -16,5 +8,4 @@ public class BasicItem extends Item {
         setUnlocalizedName(name);
         setRegistryName(name);
     }
-    
 }

src/main/java/main/util/Generator.java

@@ -5,7 +5,6 @@ import net.minecraft.block.state.IBlockState;
 import net.minecraft.init.Blocks;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
-import net.minecraft.world.gen.feature.WorldGenMinable;
 
 import java.util.Random;
 
@@ -35,7 +34,7 @@ public class Generator {
             int posX = chunkX + random.nextInt(16);
             int posY = random.nextInt(height) + minY;
             int posZ = chunkZ + random.nextInt(16);
-            new WorldGenMinable(state, size, StateMatcher.forState(replace, property, comparable)).generate(world, random, new BlockPos(posX, posY, posZ));
+            new ZWorldGenMinable(state, size, StateMatcher.forState(replace, property, comparable)).generate(world, random, new BlockPos(posX, posY, posZ));
         }
     }
 }

src/main/java/main/util/StateMatcher.java

@@ -3,6 +3,8 @@ package main.util;
 import com.google.common.base.Predicate;
 import net.minecraft.block.properties.IProperty;
 import net.minecraft.block.state.IBlockState;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
 
 
 public class StateMatcher implements Predicate<IBlockState> {
@@ -20,13 +22,57 @@ public class StateMatcher implements Predicate<IBlockState> {
         return new StateMatcher(state, property, value);
     }
 
-    public boolean apply(IBlockState state) {
+    public boolean apply(IBlockState state, BlockPos pos, World world) {
         if (state != null) {
-            if (property != null && value != null)
+            if (property != null && value != null) {
-                return state.getBlock() == this.state.getBlock() && state.getValue(property) == value;
+                if (checkLayerForBlocks(pos.getX(), pos.getZ(), pos.getY() - 1, world, pos) ||
-            else
+                        checkLayerForBlocks(pos.getX(), pos.getZ(), pos.getY(), world, pos) ||
+                        checkLayerForBlocks(pos.getX(), pos.getZ(), pos.getY() + 1, world, pos))
+                    return true;
+
+            } else
                 return state.getBlock() == this.state.getBlock();
         }
         return false;
     }
+
+    @Override
+    public boolean apply(IBlockState input) {
+        if (state != null) {
+            if (property != null && value != null) {
+                return state.getBlock() == this.state.getBlock() && state.getValue(property) == value;
+            } else
+                return state.getBlock() == this.state.getBlock();
+        }
+        return false;
+    }
+
+    private boolean checkLayerForBlocks(int X, int Z, int Y, World world, BlockPos origin) {
+        int x = 0, z = 0, dx = 0, dz = -1;
+        int t = Math.max(X, Z);
+        int maxI = t * t;
+
+        for (int i = 0; i < maxI; i++) {
+            if ((-X / 2 <= x) && (x <= X / 2) && (-Z / 2 <= z) && (z <= Z / 2)) {
+                System.out.println(x + "," + z);
+                if (new BlockPos(x, Y, z) == origin)
+                    continue;
+
+                IBlockState bState = world.getBlockState(new BlockPos(x, Y, z));
+                if (bState.getBlock() == this.state.getBlock() && bState.getValue(property) == value) {
+                    return true;
+                }
+            }
+
+            if ((x == z) || ((x < 0) && (x == -z)) || ((x > 0) && (x == 1 - z))) {
+                t = dx;
+                dx = -dz;
+                dz = t;
+            }
+            x += dx;
+            z += dz;
+        }
+
+        return false;
+    }
 }

src/main/java/main/util/ZWorldGenMinable.java

@@ -0,0 +1,86 @@
+package main.util;
+
+import com.google.common.base.Predicate;
+import net.minecraft.block.state.IBlockState;
+import net.minecraft.block.state.pattern.BlockMatcher;
+import net.minecraft.init.Blocks;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.MathHelper;
+import net.minecraft.world.World;
+import net.minecraft.world.gen.feature.WorldGenMinable;
+
+import java.util.Random;
+
+public class ZWorldGenMinable extends WorldGenMinable {
+    private final IBlockState oreBlock;
+    /**
+     * The number of blocks to generate.
+     */
+    private final int numberOfBlocks;
+    private final Predicate<IBlockState> predicate;
+
+    public ZWorldGenMinable(IBlockState state, int blockCount) {
+        this(state, blockCount, BlockMatcher.forBlock(Blocks.STONE));
+    }
+
+    public ZWorldGenMinable(IBlockState state, int blockCount, Predicate<IBlockState> predicate) {
+        super(state, blockCount, predicate);
+        this.oreBlock = state;
+        this.numberOfBlocks = blockCount;
+        this.predicate = predicate;
+    }
+
+    @Override
+    public boolean generate(World worldIn, Random rand, BlockPos position) {
+        float f = rand.nextFloat() * (float) Math.PI;
+        double d0 = (double) ((float) (position.getX() + 8) + MathHelper.sin(f) * (float) this.numberOfBlocks / 8.0F);
+        double d1 = (double) ((float) (position.getX() + 8) - MathHelper.sin(f) * (float) this.numberOfBlocks / 8.0F);
+        double d2 = (double) ((float) (position.getZ() + 8) + MathHelper.cos(f) * (float) this.numberOfBlocks / 8.0F);
+        double d3 = (double) ((float) (position.getZ() + 8) - MathHelper.cos(f) * (float) this.numberOfBlocks / 8.0F);
+        double d4 = (double) (position.getY() + rand.nextInt(3) - 2);
+        double d5 = (double) (position.getY() + rand.nextInt(3) - 2);
+
+        for (int i = 0; i < this.numberOfBlocks; ++i) {
+            float f1 = (float) i / (float) this.numberOfBlocks;
+            double d6 = d0 + (d1 - d0) * (double) f1;
+            double d7 = d4 + (d5 - d4) * (double) f1;
+            double d8 = d2 + (d3 - d2) * (double) f1;
+            double d9 = rand.nextDouble() * (double) this.numberOfBlocks / 16.0D;
+            double d10 = (double) (MathHelper.sin((float) Math.PI * f1) + 1.0F) * d9 + 1.0D;
+            double d11 = (double) (MathHelper.sin((float) Math.PI * f1) + 1.0F) * d9 + 1.0D;
+            int j = MathHelper.floor_double(d6 - d10 / 2.0D);
+            int k = MathHelper.floor_double(d7 - d11 / 2.0D);
+            int l = MathHelper.floor_double(d8 - d10 / 2.0D);
+            int i1 = MathHelper.floor_double(d6 + d10 / 2.0D);
+            int j1 = MathHelper.floor_double(d7 + d11 / 2.0D);
+            int k1 = MathHelper.floor_double(d8 + d10 / 2.0D);
+
+            for (int l1 = j; l1 <= i1; ++l1) {
+                double d12 = ((double) l1 + 0.5D - d6) / (d10 / 2.0D);
+
+                if (d12 * d12 < 1.0D) {
+                    for (int i2 = k; i2 <= j1; ++i2) {
+                        double d13 = ((double) i2 + 0.5D - d7) / (d11 / 2.0D);
+
+                        if (d12 * d12 + d13 * d13 < 1.0D) {
+                            for (int j2 = l; j2 <= k1; ++j2) {
+                                double d14 = ((double) j2 + 0.5D - d8) / (d10 / 2.0D);
+
+                                if (d12 * d12 + d13 * d13 + d14 * d14 < 1.0D) {
+                                    BlockPos blockpos = new BlockPos(l1, i2, j2);
+
+                                    IBlockState state = worldIn.getBlockState(blockpos);
+                                    if (((StateMatcher) this.predicate).apply(state, blockpos, worldIn)) {
+                                        worldIn.setBlockState(blockpos, this.oreBlock, 2);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        return true;
+    }
+}