Started refactoring simulator cursor for reuse

BauSystem/BauSystem_Main/src/de/steamwar/bausystem/utils/RCursor.java

@@ -0,0 +1,51 @@
+package de.steamwar.bausystem.utils;
+
+import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityServer;
+import de.steamwar.entity.RFallingBlockEntity;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.util.Vector;
+
+public class RCursor {
+
+    private Player owner;
+    private REntityServer targetServer;
+
+    private RFallingBlockEntity cursorEntity;
+
+    private Material highlightMaterial;
+    private Material cursorMaterial;
+
+    public RCursor(REntityServer targetServer, Material highlightMaterial, Material cursorMaterial) {
+        this.targetServer = targetServer;
+        this.highlightMaterial = highlightMaterial;
+        this.cursorMaterial = cursorMaterial;
+    }
+
+    public void render() {
+        RayTraceUtils.RRayTraceResult rayTraceResult = RayTraceUtils.traceREntity(owner, owner.getLocation(), targetServer.getEntities());
+        if(rayTraceResult == null) {
+            cursorEntity.die();
+            return;
+        }
+
+        REntity hitEntity = rayTraceResult.getHitEntity();
+
+        Material activeCursorMaterial = hitEntity == null ? cursorMaterial : highlightMaterial;
+        Location activeCursorLocation = hitEntity == null ? rayTraceResult.getHitPosition().toLocation(owner.getWorld())
+                : new Vector(hitEntity.getX(), hitEntity.getY(), hitEntity.getZ()).toLocation(owner.getWorld());
+
+        if(cursorEntity == null) {
+            cursorEntity = new RFallingBlockEntity(targetServer, activeCursorLocation, activeCursorMaterial);
+        }
+        else if(cursorEntity.getMaterial() == activeCursorMaterial) {
+            cursorEntity.move(activeCursorLocation);
+        }
+        else {
+            cursorEntity.die();
+            cursorEntity = new RFallingBlockEntity(targetServer, activeCursorLocation, activeCursorMaterial);
+        }
+    }
+}