[Mark SiblyKeymaster]

I just had a quick hack with hingechain by enabling VR and it seems to behave eactly the same as without VR.

I didn’t play with UpdateRate at all – it defaults to 60, but it’s the elapsed time parameter that really matters here. A quick way to test the effect of different update rates is to remove scene.Update from OnRender and use something like this in your ctor instead:

Monkey

New Timer( 120,Lambda() _scene.Update() End )

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New Timer( 120,Lambda() _scene.Update() End )

This works (with hingechain physics anyway) with every update rate I throw at it until I start using values less than 60, the default UpdateRate. To fix this, I need to either reduce UpdateRate to 30 or increase MaxSubSteps to 2, ie: either use one update at 30hz or 2 at 60.

What you may be having problems with is the impulse stuff as I think. I believe impulse is ‘instantaneous’ so may have to be scaled by time somehow, will look into it.

[Mark SiblyKeymaster]

The Scene.UpdateRate and Scene.MaxSteps properties are only used by bullet when stepping the simulation – they are passed to this function:

http://www.bulletphysics.org/mediawiki-1.5.8/index.php/Stepping_the_World

Thre first parameter of stepSimulation is computed by mojo3d and is simply the elapsed time since the last UpdateWorld.

You should be able to determine HMD refreshrate by DrawText-ing App.FPS and looking at the app window with HMD removed, or even just by Print-ing it.

On the Vive here, FPS is 90, but I seem to remember hezkore had to set SwapInterval=0 or he was getting 60?

[Mark SiblyKeymaster]

Thanks, the box2d module is now published and will appear in future releases.

I haven’t had a chance to play with it yet, but it at least builds OK – well done, can’t have been easy!

Anyone else who wants to have a go with it, just use the module manager from the build menu to install it.

[Mark SiblyKeymaster]

Is there a way to render a portion of an image without having to create new ones, as you do in the LoadSpriteSheet function?

There are versions of Canvas.DrawRect that have a source image parameter, eg:  DrawRect( x,y,w,h,srcimage:Image,srcx,srcy,srcw,srch )

[Mark SiblyKeymaster]

If it builds OK, just get it out there I think!

[Mark SiblyKeymaster]

> Yes a simpler official resize method would be nice…

Ok, will do.

[Mark SiblyKeymaster]

The View.Frame property can be used to ‘layout’ views – try adding this to your Window class:

Monkey

Method Resize( width:Int,height:Int ) Frame=New Recti( 0,0,width,height ).Centered( New Recti( 0,0,App.DesktopSize ) ) End

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Method Resize( width:Int,height:Int )    Frame=New Recti( 0,0,width,height ).Centered( New Recti( 0,0,App.DesktopSize ) ) End

I’m reluctant to add this to the Window class as a ‘core’ method as it duplicates functionality that’s already there (ie: Frame). However, perhaps it would make sense to add some stuff like via built-in extension methods? This approach worked out well with Entity class IMO.

And of course if your doing fullscreen there is also BeginFullscreen/EndFullscreen…

[Mark SiblyKeymaster]

The easiest way is to override the window size in the window constructor.

Have a look at the mojo template project – replace the 640,480 with your desired size:

Monkey

Namespace myapp #Import "<std>" #Import "<mojo>" Using std.. Using mojo.. Class MyWindow Extends Window Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null ) Super.New( title,width,height,flags ) End Method OnRender( canvas:Canvas ) Override App.RequestRender() canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End Function Main() New AppInstance New MyWindow App.Run() End

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Namespace myapp   #Import "<std>" #Import "<mojo>"   Using std.. Using mojo..   Class MyWindow Extends Window   Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null )   Super.New( title,width,height,flags ) End   Method OnRender( canvas:Canvas ) Override App.RequestRender() canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End   Function Main()   New AppInstance New MyWindow App.Run() End

[Mark SiblyKeymaster]

Not sure if it’s of any use to you, but I’ve just added a new ‘weak reference’ type that is already in the develop branch and will be in the next binary release in a few days.

Weak references are mainly of use for writing ‘resource caches’ and the like – they are like variables in that they contain an object reference, only they don’t keep the object live for GC purposes.

[Mark SiblyKeymaster]

Looks very cool!

[Mark SiblyKeymaster]

So if I wanted to save a zip

More functionality will need to be added to the ZipFile class before this can (easily) be done.

[Mark SiblyKeymaster]

Ok, haven’t done zip:: stream yet but you can now use Stream.SharedPath to get a unique path to an already open stream. This means the zipfile stuff is a lot nicer:

Monkey

Local zip:=ZipFile.Open( "asset::yasuko.zip" ) Local data:=zip.ExtractData( "yasuko.jpg" ) Local stream:=New DataStream( data ) image=image.Load( stream.SharedPath ) stream.Close() zip.Close()

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Local zip:=ZipFile.Open( "asset::yasuko.zip" ) Local data:=zip.ExtractData( "yasuko.jpg" ) Local stream:=New DataStream( data ) image=image.Load( stream.SharedPath ) stream.Close() zip.Close()

[Mark SiblyKeymaster]

Nice, all working A-OK here!

[Mark SiblyKeymaster]

See below for one possible solution. It loads a jpg image directly from a zip file.

It’s not very nice though, a simple ‘zip::’ stream would be sexier, or even some way to pass a DataStream to Image.Load. Will look into this…

Monkey

Namespace myapp #Import "<std>" #Import "<mojo>" #Import "yasuko.zip" Using std.. Using mojo.. Class MyWindow Extends Window Field image:Image Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null ) Super.New( title,width,height,flags ) Local zip:=ZipFile.Open( "asset::yasuko.zip" ) For Local file:=Eachin zip.Files Print file Next Local data:=zip.ExtractData( "yasuko.jpg" ) Local path:="memory::("+ULong( data.Data )+","+data.Length+")" image=Image.Load( path ) zip.Close() End Method OnRender( canvas:Canvas ) Override App.RequestRender() canvas.DrawImage( image,0,0 ) canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End Function Main() New AppInstance New MyWindow App.Run() End

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Namespace myapp   #Import "<std>" #Import "<mojo>"   #Import "yasuko.zip"   Using std.. Using mojo..   Class MyWindow Extends Window Field image:Image   Method New( title:String="Simple mojo app",width:Int=640,height:Int=480,flags:WindowFlags=Null )   Super.New( title,width,height,flags ) Local zip:=ZipFile.Open( "asset::yasuko.zip" ) For Local file:=Eachin zip.Files Print file Next Local data:=zip.ExtractData( "yasuko.jpg" ) Local path:="memory::("+ULong( data.Data )+","+data.Length+")" image=Image.Load( path ) zip.Close() End   Method OnRender( canvas:Canvas ) Override App.RequestRender() canvas.DrawImage( image,0,0 ) canvas.DrawText( "Hello World!",Width/2,Height/2,.5,.5 ) End End   Function Main()   New AppInstance New MyWindow App.Run() End

[Mark SiblyKeymaster]

Hmm, I’ve done AmbientLight = 0 and all other lights 0, to no avail.

You need to set scene.EnvColor=Color.Black too, or you’ll still be able to see specular reflections.

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