Shadow Problem

[applePi]

making a box model in milkshape, then exporting it to Ogre Mesh, the resulting file box.mesh show a shadow in the attached code. but using OgreAssimpConverter to convert it to Mesh "OgreAssimpConverter box.obj" will give a file box_obj.mesh and this does not show a shadow. looking at the both *.mesh files in notepad the first one have this info [MeshSerializer_v1.40] , and the second one [MeshSerializer_v1.8]
so what is the problem
attached the modified from the Example\3D\WorldShadows.pb
the files box.obj , box.mesh , box_obj.mesh attached here
http://www.mediafire.com/?ab5upriifgo46za
copy it to Examples\3D\Data\Models
WorldShadows.pb copy it to Examples\3D folder (added one box in the place of the sphere):

Code: Select all

;
; ------------------------------------------------------------
;
;   PureBasic - ShadowColor
;
;    (c) 2012 - Fantaisie Software
;
; ------------------------------------------------------------
;

IncludeFile "Screen3DRequester.pb"

Define.f KeyX, KeyY, MouseX, MouseY
Define DebugBody 

#CameraSpeed = 1

If InitEngine3D()
  
  Add3DArchive("Data/Textures", #PB_3DArchive_FileSystem)
  Add3DArchive("Data/Scripts",#PB_3DArchive_FileSystem)
  Add3DArchive("Data/Packs/desert.zip", #PB_3DArchive_Zip)
  Add3DArchive("Data/Models", #PB_3DArchive_FileSystem)
  Parse3DScripts()
  
  InitSprite()
  InitKeyboard()
  InitMouse()
  
  If Screen3DRequester()
    
    KeyboardMode(#PB_Keyboard_International) 
    
    WorldShadows(#PB_Shadow_Modulative, -1, RGB(0, 0, 255))
    
    ;Materials
    ;
    CreateMaterial(1, LoadTexture(1, "Wood.jpg"))
    CreateMaterial(2, LoadTexture(2, "Dirt.jpg"))
    
    ; Ground
    ;
    CreatePlane(0, 100, 100, 10, 10, 15, 15)
    CreateEntity(0, MeshID(0), MaterialID(2))
    EntityRenderMode(0, 0) 
    
    ; Meshes
    ;
    CreateCube(1, 2)
    CreateSphere(2, 2)
    CreateCylinder(3, 1, 4)
    
    LoadMesh(4, "box.mesh") ; cast a shadow
    ;LoadMesh(4, "box_obj.mesh") ;does not cast a shadow
    CreateEntity(4, MeshID(4), MaterialID(1),  0, 1,  0)
    ScaleEntity(4,15,15,15)
    
    ; Entities
    ;
    CreateEntity(1, MeshID(1), MaterialID(1), -5, 1, -5)
    CreateEntity(2, MeshID(2), MaterialID(1),  0, 8,  0)
    CreateEntity(3, MeshID(3), MaterialID(1),  5, 2,  5)
    
    ; Camera
    ;
    CreateCamera(0, 0, 0, 100, 100)
    MoveCamera(0, 0, 10, 20, #PB_Absolute)
    
    ;SkyBox
    ;
    SkyBox("desert07.jpg")
    
    ; Light
    ;
    CreateLight(0, RGB(255, 255, 255), 300, 90, -300)
    
    
    AmbientColor(RGB(20, 20, 20))
    
    Repeat
      Screen3DEvents()
      
      If ExamineMouse()
        MouseX = -MouseDeltaX() * #CameraSpeed * 0.05
        MouseY = -MouseDeltaY() * #CameraSpeed * 0.05
      EndIf
      
      If ExamineKeyboard()
        
        If KeyboardPushed(#PB_Key_Left)
          KeyX = -#CameraSpeed
        ElseIf KeyboardPushed(#PB_Key_Right)
          KeyX = #CameraSpeed
        Else
          KeyX = 0
        EndIf
        
        If KeyboardPushed(#PB_Key_Up)
          KeyY = -#CameraSpeed
        ElseIf KeyboardPushed(#PB_Key_Down)
          KeyY = #CameraSpeed
        Else
          KeyY = 0
        EndIf
        
      EndIf
      
      MoveCamera  (0, KeyX, 0, KeyY)
      RotateCamera(0,  MouseY, MouseX, 0, #PB_Relative)
      
      RenderWorld()
      Screen3DStats()
      FlipBuffers()
      
    Until KeyboardPushed(#PB_Key_Escape) Or Quit = 1
    
  EndIf
  
Else
  MessageRequester("Error", "The 3D Engine can't be initialized",0)
EndIf

End

[Kelebrindae]

I'd say that OgreAssimpConverter didn't generate the "edge list", which is used to compute stencil shadows (that would explain the difference between the size of the two files).

Using OgreMeshUpgrader on your .mesh file will perhaps fix your problem.

[applePi]

Hi Kelebrindae
your suggestion works like magic, thank you very much. i have downloaded OgreSDK_vc9_v1-8-1 and using OgreMeshUpgrader.exe in its bin/Release the shadowless box file now have a bigger size, and yes it is now casting a shadow
best regards

[Fred]

This is interresting, I will update the doc to reflect that. I also updated the OgreAssimpConverter.zip to include the OgreMeshUpdater.exe to ease the things.