The created system is composed of several scenes and the user can use menus to change the one he/she is in. When the system starts, the first scene the user is presented with is the ”Moving Video Tracking” scene. In it, the user will see a small 360 video clip of a basketball practice, recorded by a camera placed in a wheelchair moving through the basketball court. This scene has an interactable computer-generated basketball ball that follows the video’s motion. The user can interact with this ball by pointing at it with the controller and pressing the trigger button (fig. 3.5) to select it, thus activating the action associated with it. Once selected, the user goes to the ”Main Menu” scene.
From the ”Main Menu” the user can go to any of the scenes in which he/she can play the game or view a video by using the menu present in this scene (fig. 3.2). There are five scenes the user can select to go to from the main menu: two video scenes and three practice scenes. The practice scenes are the ones in which the user is in an athlete’s shoes and can practice playing basketball or controlling the player’s wheelchair.
Figure 3.2: Full Practice scene being selected in the main menu
The practice scenes are: the ”Full Practice” scene, the ”Throws Practice” scene, and the ”Wheelchair Practice” scene. In the ”Full Practice” the user can move around the court, interact with the ball and the wheelchair, and interact with a non-player character that is helping the user practice basketball. After the initial user tests that are mentioned
in section4.1, it was concluded that there should be the possibility of practicing just the ball throws and just the wheelchair control individually. Therefore, the ”Throws Practice” and the ”Wheelchair Practice” scenes were created. In the first, the user is only capable of being in certain positions of the court, from which he/she can practice throwing balls to the basket. In the second, the user can only move through the court by interacting with a virtual wheelchair.
Whenever the user chooses to go to the ”Full Practice” scene, he/she is first presented with another scene in which a small 360 video clip of the empty court is played. This is further explained in section3.2.5.1.
The video scenes are: the ”Paralympic VR Video” scene, and the ”Classification Video” scene. In the first one, the user can watch the already mentioned video made by Caroline Delmazo. In the second one, the user will watch and be able to interact with a video in which the wheelchair basketball classification, based on the players’ limitations in functional skills, is explained.
When in one of the video or practice scenes, the user can choose to change to another of these scenes or go back to the main menu one, by using a menu that is available by pressing the application menu button of the controller (fig.3.5). Every time this button is pressed in one of the controllers, the menu appears above that controller (fig.3.3a). If it is pressed in a controller that already has the menu attached, then the menu disappears.
(a) Selecting the option to go to a different practice scene
(b) Sub-menu to choose the practice scene to go to
Figure 3.3: Menu and Sub-menu
Four scripts were created to manage the menu: theMenuManager.cs, the MenuNaviga- tion.cs, the RadialMenu.cs, and the MenuButton.cs script. The MenuManager.cs is responsi-
ble for enabling and disabling the menu, and attaching it to the right controller.
3 . 2 . I M P L E M E N TAT I O N
which menu options are displayed. This control is of the responsibility of theMenuNavi- gation.cs script. Whenever the user selects a menu option that opens a different sub-menu,
this script enables that sub-menu and disables the previous one so that only the right one is visible.
Both the menu and sub-menus are radial menus, in which the options are displayed in a circular arrangement. TheRadialMenu.cs script calculates the position each menu
option must be in and places it there.
Each of the GameObjects that represent a menu option has, as a component, the
MenuButton.cs script. One of the properties of this component is which action will be
performed when that menu option is selected. The actions available are:
• Change Scene - Loads a new scene whose name is also a property of the component. • Change Menu - Changes which sub-menu is displayed.
• Quit - Exits the system. • None - No action.
To select a menu option the user just needs to touch that option with the controller the menu is not attached to. After a period of time touching an option, during which a radial progress bar gets filled, that option is selected.
The main menu is similar to the menu of the other scenes, but is not displayed in a circular arrangement, is not attached to a controller, and instead of an option being selected by having the user touch it, it is selected when the user points at it with the controller and presses the trigger button. Raycasting is used to create this interaction with the GameObjets of the menu options by allowing to know which option is being pointed to.
Whenever the user goes to a different scene, the LoadLevel.cs script is the one respon- sible for the loading of that scene and for showing either a loading image or just pitch black, while changing between scenes. The option of displaying the loading image is used for when the scene being loaded takes a long time to load. This script is further explained in3.2.5.1.