Added 3D window to GameView3D to begin adding assets to. Used it to refine all 3D assets implemented by ModelFactory and manually test that they work.

#implement #test

src/main/java/seng302/visualiser/fxObjects/assets_2D/CourseBoundary.java

@@ -0,0 +1,15 @@
+package seng302.visualiser.fxObjects.assets_2D;
+
+import javafx.scene.paint.Color;
+import javafx.scene.shape.Polygon;
+
+/**
+ * Polygon with default course border settings.
+ */
+public class CourseBoundary extends Polygon {
+    public CourseBoundary() {
+        this.setStroke(new Color(0.0f, 0.0f, 0.74509807f, 1));
+        this.setStrokeWidth(3);
+        this.setFill(new Color(0,0,0,0));
+    }
+}