[Ok] Additive Shadows distorted with OpenGL

[Olby]

Run the following code (you will need cube50.mesh file):

Code: Select all

CompilerIf Subsystem("OpenGL")
	Debug "Compiling with the OpenGL subsystem"
	
	If InitEngine3D(#PB_Engine3D_DebugOutput)
	
	  Add3DArchive(".\",#PB_3DArchive_FileSystem)
	
	  InitSprite()
	  InitKeyboard()
	  InitMouse()
	  AntialiasingMode(#PB_AntialiasingMode_x2)
	
	  If OpenWindow(0, 0, 0, 800, 600, "PureBasic (OpenGL vs DirectX)", #PB_Window_SystemMenu | #PB_Window_ScreenCentered) And OpenWindowedScreen(WindowID(0), 0, 0, 800, 600, 0, 0, 0)
	
	  	AmbientColor(RGB(32, 32, 32))
	  	WorldShadows(#PB_Shadow_Additive,100,0,2048)
	  	
	    CreateCamera(0, 0, 0, 100, 100)
	    CreateCube(0,10)
	    CreateEntity(0,MeshID(0),0)
	    
	    CreateLight(1,RGB(255,0,0),0,0,0)
	    CreateSphere(1,5)
	    CreateEntity(1,MeshID(1),0,0,0,0)
	    AttachEntityObject(1,"",LightID(1))
	    EntityRenderMode(1,0)
	
	    LoadMesh(2,"cube50.mesh")
	    TransformMesh(2,0,0,0,1.0,1.0,1.0,0,0,0)
	    NormalizeMesh(2)
	    CreateEntity(2,MeshID(2),0,0,0,0)
	    EntityRenderMode(2,0)
	    
	    CreateLight(2,RGB(0,255,0),0,0,0)
	    CreateSphere(3,5)
	    CreateEntity(3,MeshID(3),0,0,0,0)
	    AttachEntityObject(3,"",LightID(2))
	    EntityRenderMode(3,0)
	    
	    MoveCamera(0,0,0,90)
	    
	    Repeat
	    	ExamineKeyboard()
	    	ExamineMouse()
	
	    	MoveEntity(1, (10.0 * Cos(ElapsedMilliseconds() / 300)),  15, (10.0 * Sin(ElapsedMilliseconds() / 300)), #PB_Absolute)
	    	MoveEntity(3, (10.0 * Cos(ElapsedMilliseconds() /1000)), -15, (10.0 * Sin(ElapsedMilliseconds() /1000)), #PB_Absolute)
	    	RotateEntity(0,1.0,0,1.0,#PB_Relative)
	    	;RotateEntity(2,1.0,0,1.0,#PB_Relative)
	
	      RenderWorld()
	      FlipBuffers()
	      
	    Until KeyboardPushed(#PB_Key_Escape) Or WindowEvent() = #PB_Event_CloseWindow
	  EndIf
	
	EndIf

CompilerElse
	CompilerError "Please compile with the OpenGL subsystem"	
CompilerEndIf

End

Using OpenGL subsystem additive shadows are distorted if compared to DirectX counterpart (see screen print).



Please feel free to move this to bug forum once and if confirmed.

Running on the latest official nVidia drivers here.

[applePi]

Hi Olby
the shadow using opengl subsys seems good on my system look the picture

the same as using dx.
my vga card is Geforce 210, and using the glview from http://www.realtech-vr.com/glview/ it gives the following info for my graphics system

[Olby]

Thanks Pi, after running GLView I noticed that my nVidia drivers were automatically switching to the built in video card, as soon as I forced it to always use the high-performance Geforce GT630 (it supports OpenGL up to v4.3) problems vanished. Good catch.

[Edit]

ApplePi, can you try the "textureadditive" variant for the shadows. They seem not to work properly if more than one light source is used.

[Fred]

The TextureAdditive issue is a bug which has been corrected for the next version.

[Olby]

Thanks Fred, good to know.