source: data/contentcreation/pps/noep/HeavyCruiser/INFO.txt @ 9895

==== Refer to the following links for further information ====
http://www.orxonox.net/wiki/HeavyCruiser
http://forum.orxonox.net/viewtopic.php?f=1&t=1104


    ---=== TODO ===---
  
- Allow Big Ships to have sub-parts.
  
(- Adapt the HUD to show individual part's health.
  Edit /trunk/dataoverlays/HUDTemplates3.oxo and corresponding classes in src/modules/overlays/hud/)



    ---=== PROBLEMS ===---

- When firing weapons mounted at the front of the ship, the aim is incorrect,
  due to the cursor (target) position being too close to the camera.
  Fix:  Move position of cursor further away. (src/orxonox/controllers/NewHumanController.cc, updateTarget(), line 445)

- Turrets cannot be attached to the ship in its template, due to turrets being spaceships by themselves.
  Fix:  Redesign Turret class. -> MovableEntity? ShipPart?

- Only Pawns are able to receive hits. However Pawns are dynamic entities, which cannot be attached to another.
  Fix:  Major changes in the code-structure of Pawns/Entities required. There should be destructible not-dynamic entities.



    ---=== POSSIBLE APPROACHES ===---

- Sub-Parts are Pawns.
    PRO: - Basic structure of a destructible (and controllable, for turrets) is provided.
    CON: - Need to build something to hook Pawns together, allowing them to interact with each other.

- Create a new class/interface: DestructibleEntity.
  Create a new class: ShipPart, which is a DestructibleEntity.
  Create a new class: Turret, which is a ShipPart.
    PRO: - More 'leightweight' than a Pawn. Can be used for simple things such as Asteroids too.
         - Parts can easily be attached to each other in XML
    CON: - Need to copy property of getting damage from hits from pawns
         - Need to add controllers for Turret again


!=== THE FOLLOWING REFERS TO THE LAST APPROACH ===!

    HOW IT'LL LOOK IN XML

<BigShip [parameters]>

    <engines>
        ...
    </engines>
    
    <attached>    
        <Model [parameters] />
        
        <ShipPart [parameters]>
            <attached>
                <Model [parameters] />
            </attached>
            <collisionShapes>
                ...
            </collisionShapes>
        </ShipPart>
        
        <ShipPart [parameters]>
            ...
        </ShipPart>
    </attached>
    
    <collisionShapes>
        ...
    </collisionShapes>
    
<BigShip>



    DETAILS:

- BigShip class:
    - /src/orxonox/worldentities/pawns -> Create BigShip.cc and BigShip.h, inherit from SpaceShip
    - Damage can be shared with sub-parts. (Implement new HUD, which shows sub-parts health?)
     ?- How to manage/list sub-parts? Arrays?
      - Modify damage() as needed, calls damagePart()
      - Spread damage relative to how much of the overall health a part has.
        (If a part has 20% of the total health, it gets 20% of the damage)
      - void damagePart(... , ShipPart part)
    - Destruction of sub-parts can alter datavalues of the ship (e.g. shield or acceleration)
      or disable weapons

- DestructibleEntity class
   ?- is a StaticEntity?
    - defined in XML Parameters: health, animation upon death
    - receives damage from hits (and from other sources?)
    - has health
    - special events on 'destruction'
    - special animation upon destruction
 
- ShipPart class
    - is a DestructibleEntity
    - has a BigShip as *owner
    - Has own health
    - Receives damage from direct hits and from parent-part
    - Triggers events on destruction (e.g. disabling weapons or weakening shields)
      - Invisible & not collidable? Or actually inexistent?

- Turret class
   ?- is a ShipPart?
    - has a controller