Add option to TrimNegative to not trim y

Author: BitcoderCZ

FancadeLoaderLib.Tests/BlockDataTests.cs

@@ -87,6 +87,18 @@ public void TrimNegative_ShiftsBlocksToOrigin()
 
 		blockData.TrimNegative();
 
+		Assert.That(blockData.Size, Is.EqualTo(new int3(1, 4, 3)));
+		Assert.That(blockData.GetBlock(new int3(0, 2, 0)), Is.EqualTo(99));
+	}
+
+	[Test]
+	public void TrimNegative_TrimY_ShiftsBlocksToOrigin()
+	{
+		var blockData = new BlockData(new Array3D<ushort>(new int3(4, 4, 4)));
+		blockData.SetBlock(new int3(3, 2, 1), 99);
+
+		blockData.TrimNegative(trimY: true);
+
 		Assert.That(blockData.Size, Is.EqualTo(new int3(1, 2, 3)));
 		Assert.That(blockData.GetBlock(new int3(0, 0, 0)), Is.EqualTo(99));
 	}

FancadeLoaderLib/BlockData.cs

@@ -382,7 +382,7 @@ public void Trim(bool shrink = true)
 		}
 	}
 
-	public void TrimNegative(bool shrink = true)
+	public void TrimNegative(bool shrink = true, bool trimY = false)
 	{
 		if (Size == int3.Zero)
 		{
@@ -456,7 +456,7 @@ public void TrimNegative(bool shrink = true)
 		endZ:
 			if (minX != int.MinValue && minY != int.MinValue && minZ != int.MinValue)
 			{
-				int3 minPos = new int3(minX, minY, minZ);
+				int3 minPos = new int3(minX, trimY ? minY : 0, minZ);
 
 				if (minPos == int3.Zero)
 				{