Change the front facing direction of a block programmatically.

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

src/sig/Block.java

@@ -4,10 +4,17 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class Block {
+    final static int CLOCKWISE = 1;
+    final static int COUNTER_CLOCKWISE = -1;
+    final static int SOUTH = 0;
+    final static int WEST = 1;
+    final static int NORTH = 2;
+    final static int EAST = 3;
     Vector pos;
     Mesh block;
     FaceList neighbors;
-    Block(Vector pos,Mesh block) {
+    private FacingDirection facingDir;
+    Block(Vector pos,Mesh block,FacingDirection facingDir) {
         this.neighbors=new FaceList();
         this.pos=pos;
         List<Triangle> newTris = new ArrayList<>();
@@ -17,6 +24,34 @@ public class Block {
             newTris.add(newT);
         }
         this.block=new Mesh(newTris);
+        this.facingDir=facingDir;
+    }
+    private void updateFacingDirection(FacingDirection targetDirection) {
+        while (facingDir!=targetDirection) {
+            Texture t1 = block.triangles.get(0).tex;
+            Texture t2 = block.triangles.get(1).tex;
+            block.triangles.get(0).tex=block.triangles.get(2).tex;
+            block.triangles.get(1).tex=block.triangles.get(3).tex;
+            block.triangles.get(2).tex=block.triangles.get(4).tex;
+            block.triangles.get(3).tex=block.triangles.get(5).tex;
+            block.triangles.get(4).tex=block.triangles.get(6).tex;
+            block.triangles.get(5).tex=block.triangles.get(7).tex;
+            block.triangles.get(6).tex=t1;
+            block.triangles.get(7).tex=t2;
+            facingDir=facingDir.clockwise();
+        }
+    }
+    public void setFacingDirection(FacingDirection direction) {
+        updateFacingDirection(direction);
+    }
+    public FacingDirection getFacingDirection() {
+        return facingDir; 
+    }
+    public void rotateClockwise() {
+        updateFacingDirection(facingDir.clockwise());
+    }
+    public void rotateCounterClockwise() {
+        updateFacingDirection(facingDir.counterClockwise());
     }
     public void updateFaces() {
         if (SigRenderer.blockGrid.containsKey(pos.x+"_"+(pos.y+1)+"_"+pos.z)) {

src/sig/FacingDirection.java

@@ -0,0 +1,16 @@
+package sig;
+
+public enum FacingDirection {
+    SOUTH,
+    WEST,
+    NORTH,
+    EAST;
+
+    static FacingDirection[] orderList = new FacingDirection[]{SOUTH,WEST,NORTH,EAST};
+    FacingDirection clockwise() {
+        return orderList[(this.ordinal()+1)%orderList.length];
+    }
+    FacingDirection counterClockwise() {
+        return orderList[Math.floorMod((this.ordinal()-1),orderList.length)];
+    }
+}

src/sig/SigRenderer.java

@@ -115,6 +115,9 @@ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListene
                     }break;
                 }
             } else 
+            if (answer.e.getButton()==MouseEvent.BUTTON2) {
+                answer.t.b.rotateClockwise();
+            } else 
             if (answer.e.getButton()==MouseEvent.BUTTON3) {
                 removeBlock(answer.t.b.pos);
             }
@@ -123,7 +126,7 @@ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListene
     }
 
     public static void addBlock(Vector pos,BlockType type) {
-        Block b = new Block(pos,new Cube(type));
+        Block b = new Block(pos,new Cube(type),FacingDirection.SOUTH);
         blockGrid.put(pos.x+"_"+pos.y+"_"+pos.z,b);
         b.updateFaces();
     }
@@ -170,7 +173,7 @@ public class SigRenderer implements KeyListener,MouseListener,MouseMotionListene
                 if (x%8>2&&x%8<6&&y>1&&y<4) {
                     addBlock(new Vector(x,y,16),BlockType.GLASS);
                 } else {
-                    addBlock(new Vector(x,y,16),BlockType.ICE);
+                    addBlock(new Vector(x,y,16),BlockType.FURNACE);
                 }
             }
         }