White box after deleting all objects (of one type)

Comments

• iarwain

  July 2012 edited July 2012

  Hi!
  
  Well resources will always get reloaded if needed, you can see that happening in the default playground that comes with orx where the ball objects get deleted via the LifeTime handling and get created via left click.
  
  If you get a white square, that means a texture has been loaded/used as if no texture were found, the object wouldn't even be sent to the renderer.
  
  So it's either a bug somewhere in orx or a possible misuse.
  
  Could we get more config/code details of your case?
• KarloBob

  July 2012 edited July 2012

  Thats how the object is created

  orxVECTOR mousePosition;
  	orxMouse_GetPosition(&mousePosition);
  	orxVECTOR *ptrMouseInWorldPosition = orxRender_GetWorldPosition(&mousePosition, &mousePosition);
  	ptrMouseInWorldPosition->fZ = 0;
  	
  	//create in-world object
  	orxOBJECT *ptrObject =  orxObject_CreateFromConfig(nameOfObjThatWillBePlaced);
  	orxObject_SetPosition (ptrObject, ptrMouseInWorldPosition);
  	
  

  
  And thats the relevant(I hope so) config:
  

  [Display]
  Title                   = Harrybalt
  Decoration              = true
  FullScreen              = false
  ScreenWidth             = 640
  ScreenHeight            = 480
  ScreenDepth             = 32
  VSync                   = false
  Smoothing               = false
   
  [MainViewport]
  Camera               = MainCamera
  BackgroundColor      = (155, 0, 55)
  
   
  [MainCamera]
  FrustumWidth         = @Display.ScreenWidth
  FrustumHeight        = @Display.ScreenHeight
  FrustumFar           = 2.0                   
  FrustumNear          = 0.0                  
  Position             = (0.0, 0.0, -1.0)
  
  [Hero]
  Graphic         	= HeldIdleRight
  AnimationSet        = HeldAnimation
  Position           	= (0.0, 0.0, 0.0)
  Body                = HeroComplete
  Scale               = 2.0
  AutoScroll		= both
  DepthScale  		= true
  
  [HeroComplete]
  PartList           = HeroPart
  AllowGroundSliding = true
  AngularDamping     = 0.0
  Dynamic            = true
  FixedRotation      = true
  HighSpeed          = false
  Inertia            = 0.0
  LinearDamping      = 0.0
  
  [HeroPart]
  Type        = box
  Restitution = 0.0
  Friction    = 0.0
  SelfFlags   = 0x0001
  CheckMask   = 0xFFFF
  Solid       = true
  Density     = 1.0
  
  
  [HeroGraphics]
  Texture         	= data/opa/npc1.png
  Pivot               = center
  TextureSize 		=(21, 41, 0)
  

  
  There were no error messages.
  In fear this is not sufficient I've uploaded the project
  on Dropbox for you: Download
  
  This was created on Ubuntu 12.04 64bit.
• iarwain

  July 2012 edited July 2012

  Hi!
  
  Thanks for the details and mostly for the project, without that I wouldn't have found the bug that easily!
  
  That bug happened in a very specific use case which doesn't often happen in real game situation, hence no one ever reported it so far.
  
  What is happening in the display plugins is that we cache the latest used texture to prevent unnecessary texture binding. In your case you were only using one single texture, then deleting all the objects referencing that texture lead to unloading the texture (but not clearing the cached value!), then recreating an object right after that would re-load that same texture at the exact same memory address (that's the important bit and unlikely to happen in a real game/multi-texture situation) which lead the cache to think that we were still rendering the exact same texture and not triggering a rebind of it with OpenGL, thus leading to that white display.
  
  I've fixed all the non-deprecated plugins (latest svn version) for all supported platforms but haven't got the opportunity tested on iOS/Android. That being said I'm confident the fix was simple enough to work on those platforms too.
  
  Thanks for reporting that issue and let us know if you encounter any other problem!