Code cleanup and refactoring before porting

Common/src/main/java/com/hypherionmc/craterlib/util/MathUtils.java

@@ -0,0 +1,41 @@
+package com.hypherionmc.craterlib.util;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.world.phys.shapes.Shapes;
+import net.minecraft.world.phys.shapes.VoxelShape;
+
+/**
+ * @author HypherionSA
+ * Utility class to handle various mathematical functions
+ */
+public class MathUtils {
+
+    public static VoxelShape rotateShape(Direction from, Direction to, VoxelShape shape) {
+        VoxelShape[] buffer = new VoxelShape[]{shape, Shapes.empty()};
+
+        int times = (to.ordinal() - from.ordinal() + 4) % 4;
+        for (int i = 0; i < times; i++) {
+            buffer[0].forAllBoxes((minX, minY, minZ, maxX, maxY, maxZ) -> buffer[1] = Shapes.or(buffer[1], Shapes.box(1 - maxZ, minY, minX, 1 - minZ, maxY, maxX)));
+            buffer[0] = buffer[1];
+            buffer[1] = Shapes.empty();
+        }
+        return buffer[0];
+    }
+
+    public static void writeBlockPosToNBT(BlockPos pos, CompoundTag tag) {
+        tag.putInt("block_x", pos.getX());
+        tag.putInt("block_y", pos.getY());
+        tag.putInt("block_z", pos.getZ());
+    }
+
+    public static BlockPos readBlockPosFromNBT(CompoundTag tag) {
+        int x, y, z;
+        x = tag.getInt("block_x");
+        y = tag.getInt("block_y");
+        z = tag.getInt("block_z");
+        return new BlockPos(x, y, z);
+    }
+
+}