diff --git a/src/main/java/cactusServer/entities/Object.java b/src/main/java/cactusServer/entities/Object.java
index f2e55d1..6dc0fe6 100644
--- a/src/main/java/cactusServer/entities/Object.java
+++ b/src/main/java/cactusServer/entities/Object.java
@@ -1,6 +1,7 @@
 package cactusServer.entities;
 
 import org.ntlab.radishforandroidstudio.framework.model3D.Model3D;
+import org.ntlab.radishforandroidstudio.framework.model3D.Object3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Position3D;
 import org.ntlab.radishforandroidstudio.framework.model3D.Quaternion3D;
 import org.ntlab.radishforandroidstudio.framework.physics.AngularVelocity3D;
@@ -19,6 +20,7 @@
 	private Quaternion3D angle;
 	private Attribute attribute;
 	private Model3D model;
+	private Object3D object;
 
 	@JSONHint(ignore = true)
 	public static final int UNIQUE_ID_LENGTH = 12;
@@ -36,6 +38,7 @@
 		setAngle(angle);
 		setAttribute(attribute);
 		setModel(modelID);
+		setPlaceable(object);
 	}
 
 	public Position3D getPosition() {
@@ -53,7 +56,7 @@
 	public Quaternion3D getAngle() {
 		return angle;
 	}
-	
+
 	public Attribute getAttribute() {
 		return attribute;
 	}
@@ -91,9 +94,9 @@
 		private double cof; // ���C�W��
 
 		private Attribute() {
-			
+
 		}
-		
+
 		public Attribute(boolean moveable, double cof) {
 			setMoveable(moveable);
 			setCof(cof);
diff --git a/src/main/java/cactusServer/resources/ObjectsRest.java b/src/main/java/cactusServer/resources/ObjectsRest.java
index 6d213ab..200610c 100644
--- a/src/main/java/cactusServer/resources/ObjectsRest.java
+++ b/src/main/java/cactusServer/resources/ObjectsRest.java
@@ -28,7 +28,7 @@
 
 	@Path("/{objectId}")
 	@GET
-	//@Produces(MediaType.APPLICATION_JSON)
+	// @Produces(MediaType.APPLICATION_JSON)
 	@Produces(MediaType.TEXT_PLAIN)
 	public String getObject(@PathParam("instanceId") String instanceId, @PathParam("objectId") String objectId) {
 		Instance instance = Instances.getInstance().getInstance(instanceId);
@@ -39,19 +39,19 @@
 	}
 
 	@GET
-	//@Produces(MediaType.APPLICATION_JSON)
+	// @Produces(MediaType.APPLICATION_JSON)
 	@Produces(MediaType.TEXT_PLAIN)
 	public String getObjects(@PathParam("instanceId") String instanceId) {
 		return JSON.encode(Instances.getInstance().getInstance(instanceId).getObjects());
 	}
 
 	@POST
-	//@Produces(MediaType.APPLICATION_JSON)
+	// @Produces(MediaType.APPLICATION_JSON)
 	@Produces(MediaType.TEXT_PLAIN)
-	public String createObject(@PathParam("instanceId") String instanceId,
-			@FormParam("position") Position3D position, @FormParam("velocity") Velocity3D velocity,
-			@FormParam("angularVelocity") AngularVelocity3D angularVelocity, @FormParam("angle") Quaternion3D angle,
-			@FormParam("attribute") Attribute attribute, @FormParam("model") int modelID) {
+	public String createObject(@PathParam("instanceId") String instanceId, @FormParam("position") Position3D position,
+			@FormParam("velocity") Velocity3D velocity, @FormParam("angularVelocity") AngularVelocity3D angularVelocity,
+			@FormParam("angle") Quaternion3D angle, @FormParam("attribute") Attribute attribute,
+			@FormParam("model") int modelID) {
 		Instance instance = Instances.getInstance().getInstance(instanceId);
 		HashMap<String, Object> idMap = instance.createObject(position, velocity, angularVelocity, angle, attribute,
 				modelID);
@@ -65,7 +65,7 @@
 
 	@Path("/{objectId}")
 	@PUT
-	//@Produces(MediaType.APPLICATION_JSON)
+	// @Produces(MediaType.APPLICATION_JSON)
 	@Produces(MediaType.TEXT_PLAIN)
 	public String updateObject(@PathParam("instanceId") String instanceId, @PathParam("objectId") String objectId,
 			@FormParam("position") Position3D position, @FormParam("velocity") Velocity3D velocity,
diff --git a/src/main/java/cactusServer/utils/App.java b/src/main/java/cactusServer/utils/App.java
index 0294f21..0e7f785 100644
--- a/src/main/java/cactusServer/utils/App.java
+++ b/src/main/java/cactusServer/utils/App.java
@@ -30,6 +30,7 @@
 @ApplicationPath("/rest")
 public class App extends ResourceConfig implements Runnable {
 	private ScheduledThreadPoolExecutor task = new ScheduledThreadPoolExecutor(4);
+	private int instancesSize;
 
 	public App() {
 		ObjectModelManager.getInstance();
@@ -45,6 +46,17 @@
 	@Override
 	public void run() {
 		//System.out.println("�^�X�N�����s");
+		instancesSize = Instances.getInstance().getInstances().size();
+		for(int i=0;i<instancesSize;i++) {
+			Instance instance = Instances.getInstance().getInstances().get(i);
+			int objectsSize = instance.getObjects().size();
+			int playersSize=instance.getCharacters().size();
+			for(int j=0;j<objectsSize;j++) {
+				for(int x=0;x<playersSize;x++) {
+					//PhysicsUtility.checkCollision(instance.)
+				}
+			}
+		}
 	}
 
 	public void start(int interval) {