Light rotating with model?

[TurkeyLurkerParticipant]

When I run the following code, the loaded object is rotating, but the light seems to rotate along with the object. What could I be doing wrong?

Monkey

[crayon-5cba9534a1477963151305 inline="true" ]Namespace MyModel #Import "<std>" #Import "<mojo>" #Import "<mojo3d>" #Import "<mojo3d-loaders>" #Import "assets/" #Import "util" Using std.. Using mojo.. Using mojo3d.. Class MyWindow Extends Window Field _scene:Scene Field _camera:Camera Field _light:Light Field _ground:Model Field _rim:Model Method New( title:String="Simple mojo app mymodel test",width:Int=640,height:Int=480,flags:WindowFlags=WindowFlags.Resizable ) Super.New( title,width,height,flags ) _scene=Scene.GetCurrent() _camera=New Camera _camera.Near=.1 _camera.Far=100 _camera.Move( 0,0,-2.0) _light=New Light _light.Rotate( Pi/2,0,0 ) 'aim directional light 'down' - Pi/2=90 degrees. _rim=Model.Load("asset::intro/introrim.dae" ) End Method OnRender( canvas:Canvas ) Override _rim.Rotate(0,0,.5) RequestRender() _scene.Render( canvas,_camera ) canvas.Scale( Width/640.0,Height/480.0 ) canvas.DrawText( "Width="+Width+", Height="+Height+", FPS="+App.FPS,0,0 ) End End Function Main() New AppInstance New MyWindow App.Run() End

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[crayon-5cba9534a1477963151305 inline="true" ]Namespace MyModel   #Import "<std>" #Import "<mojo>" #Import "<mojo3d>" #Import "<mojo3d-loaders>"   #Import "assets/"   #Import "util"   Using std.. Using mojo.. Using mojo3d..   Class MyWindow Extends Window   Field _scene:Scene Field _camera:Camera Field _light:Light Field _ground:Model Field _rim:Model   Method New( title:String="Simple mojo app mymodel test",width:Int=640,height:Int=480,flags:WindowFlags=WindowFlags.Resizable ) Super.New( title,width,height,flags )   _scene=Scene.GetCurrent()   _camera=New Camera _camera.Near=.1 _camera.Far=100 _camera.Move( 0,0,-2.0)   _light=New Light _light.Rotate( Pi/2,0,0 ) 'aim directional light 'down' - Pi/2=90 degrees.   _rim=Model.Load("asset::intro/introrim.dae" ) End   Method OnRender( canvas:Canvas ) Override _rim.Rotate(0,0,.5) RequestRender() _scene.Render( canvas,_camera ) canvas.Scale( Width/640.0,Height/480.0 ) canvas.DrawText( "Width="+Width+", Height="+Height+", FPS="+App.FPS,0,0 ) End   End   Function Main() New AppInstance New MyWindow App.Run() End

[/crayon]

Attachments:

1. introrim.7z

[Mark SiblyKeymaster]

I think there is something about the introrim.dae model monkey2 doesn’t like. How was it created?

If you replace it with the BirdieFly ‘bird’ model or a plain sphere via Model.CreateSphere() etc lighting behaves as expected.

Actaully, looking at the model in Open 3D ModelViewer (which also uses assimp), some of the model normals appear to be ‘twisted’, ie: they are not pointing ‘out of’ the model but at odd angles to it, in same cases parallel to it. This will certainly make lighting look crappy.

[TurkeyLurkerParticipant]

The introrim.dae was created in Poser by using a torus primitive and scaling it down with a morph target. After I read your response, I created another torus in blender and now the lights behave as expected in Mojo3d. So much for using Poser as a modeller. :>

Thanks for your time.

[Author]

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