Added cave mode for MaceDMGHack to find free space within fall height if target position is obstructed.

Author: Altidias

src/main/java/net/wurstclient/hacks/MaceDmgHack.java

@@ -10,10 +10,12 @@
 import net.minecraft.network.protocol.game.ServerboundMovePlayerPacket.Pos;
 import net.minecraft.world.entity.Entity;
 import net.minecraft.world.item.Items;
+import net.minecraft.world.phys.AABB;
 import net.wurstclient.Category;
 import net.wurstclient.SearchTags;
 import net.wurstclient.events.PlayerAttacksEntityListener;
 import net.wurstclient.hack.Hack;
+import net.wurstclient.settings.CheckboxSetting;
 import net.wurstclient.settings.SliderSetting;
 import net.wurstclient.settings.SliderSetting.ValueDisplay;
 
@@ -22,18 +24,26 @@ public final class MaceDmgHack extends Hack
 	implements PlayerAttacksEntityListener
 {
 	private static final double DEFAULT_HEIGHT = Math.sqrt(500);
-	
+	private static final double MIN_FALL = 1.6;
+	private static final double SCAN_STEP = 0.25;
+
 	private final SliderSetting height = new SliderSetting("Height",
 		"How high to fake before slamming. Height determines the damage boost.",
 		DEFAULT_HEIGHT, 1.6, 50, 0.1, ValueDisplay.DECIMAL);
-	
+
+	private final CheckboxSetting caveMode = new CheckboxSetting("Cave mode",
+		"Scans for an air gap above you to fall through, so smashes work under"
+			+ " a ceiling. Fully sealed spaces still can't be smashed.",
+		true);
+
 	private long lastSmashTick = -1;
-	
+
 	public MaceDmgHack()
 	{
 		super("MaceDMG");
 		setCategory(Category.COMBAT);
 		addSetting(height);
+		addSetting(caveMode);
 	}
 
 	@Override
@@ -70,10 +80,26 @@ public void doSmash()
 		// Also, let me know if you find a way to bypass that check.
 		for(int i = 0; i < 4; i++)
 			sendFakeY(0);
-		sendFakeY(height.getValue());
+		sendFakeY(findFallOffset());
 		sendFakeY(0);
 	}
-	
+
+	private double findFallOffset()
+	{
+		double cap = height.getValue();
+		if(!caveMode.isChecked() || MC.level == null)
+			return cap;
+
+		for(double off = cap; off >= MIN_FALL; off -= SCAN_STEP)
+		{
+			AABB box = MC.player.getBoundingBox().move(0, off, 0);
+			if(MC.level.noCollision(MC.player, box))
+				return off;
+		}
+
+		return cap;
+	}
+
 	private void sendFakeY(double offset)
 	{
 		MC.player.connection