Created foundation classes and interfaces for collision architecture.

- Added Collider interface
- Added Collision class
- Added ColliderRegistry class

#story[1100]

racevisionGame/src/main/java/mock/model/collider/Collider.java

@@ -0,0 +1,22 @@
+package mock.model.collider;
+
+import mock.model.MockBoat;
+
+/**
+ * Interface for all objects sensitive to collision in a race.
+ */
+public interface Collider {
+    /**
+     * Indicates whether a ray cast from a boat to a target collider triggers a collision.
+     * @param boat potentially colliding with target
+     * @param collision details of potential collision
+     * @return whether or not a collision has occurred
+     */
+    boolean rayCast(MockBoat boat, Collision collision);
+
+    /**
+     * Handle a collision event
+     * @param e details of collision
+     */
+    void onCollisionEnter(Collision e);
+}

racevisionGame/src/main/java/mock/model/collider/ColliderRegistry.java

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+package mock.model.collider;
+
+import mock.model.MockBoat;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Registry for all Collider objects in a MockRace. Wraps the Collider interface as part of a Composite Pattern.
+ */
+public class ColliderRegistry implements Collider {
+    /**
+     * List of all registered Colliders
+     */
+    private List<Collider> colliders;
+
+    /**
+     * Default constructor for ColliderRegistry
+     */
+    public ColliderRegistry() {
+        this.colliders = new ArrayList<>();
+    }
+
+    public void addCollider(Collider collider) {
+        colliders.add(collider);
+    }
+
+    public void removeCollider(Collider collider) {
+        colliders.remove(collider);
+    }
+
+    @Override
+    public boolean rayCast(MockBoat boat, Collision collision) {
+        for(Collider collider: colliders) {
+            if(collider.rayCast(boat, collision)) return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void onCollisionEnter(Collision e) {}
+}

racevisionGame/src/main/java/mock/model/collider/Collision.java

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+package mock.model.collider;
+
+import shared.model.Bearing;
+
+/**
+ * Data structure for holding collision details for ray casting and event handling.
+ */
+public class Collision {
+    /**
+     * Bearing from boat heading to target
+     */
+    private Bearing bearing;
+    /**
+     * Distance from boat centre to target centre
+     */
+    private double distance;
+
+    /**
+     * Constructor for Collision structure
+     * @param bearing from boat heading to target
+     * @param distance from boat centre to target centre
+     */
+    public Collision(Bearing bearing, double distance) {
+        this.bearing = bearing;
+        this.distance = distance;
+    }
+
+    public Bearing getBearing() {
+        return bearing;
+    }
+
+    public double getDistance() {
+        return distance;
+    }
+}