Re: Motion Blur in two passes ???

["Sandy Sutherland" <sandy(at)refinery.co.za>]

Here you go! - Change the .txt to .js

S.

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Sandy Sutherland  Digital Doodeller - TD
The Refinery (Cape)  http://www.refinery.co.za
mailto:sandy(at)refinery.co.za
(P) (+27 21) 480 3132  (F) (+27 21) 480 3101
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----- Original Message ----- 
From: "kim aldis" <kim(at)aldis.org.uk>
To: <XSI(at)Softimage.COM>
Sent: Wednesday, July 20, 2005 2:10 PM
Subject: RE: Motion Blur in two passes ???


> I wrote a script a short while back that allows you to increase the image
> resolution and at the same time increase the fov of the camera to
> compensate. This sounds like what you need. Unfortunately I lost it but
> usually it pops up again when I grovel to the list. Anyone?
>
> General hint, in case you've not spotted it; use rapid motion for your 
> blur
> render. Also give it a shot on the non-blurred render. You should get 
> better
> frame times on both.
>
> > -----Original Message-----
> > From: owner-xsi(at)Softimage.COM
> > [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Andrew Konkin
> > Sent: 20 July 2005 12:45
> > To: XSI
> > Subject: Motion Blur in two passes ???
> >
> > Hello List.
> > I have to use motion blur in two pass.
> > First pass I've render a scene without motion blur and second
> > pass I've render the scene with motion blur and project the
> > sequence of first pass to geometry of the scene with using
> > constant shader , seems I do it the way everybody know.
> > But there is a little problem when I render the second pass ,
> > corners of the frames have black artifacts which definitely
> > appear because of way I do motion blur.
> > Does anybody know the way to add to current resolution of a
> > frames a little bit more pixels around the frames during
> > final render and also kipping same ratio of viewing of the
> > frames like in view port camera in XSI.
> > For example I've render a frames with 720 576 resolution and
> > have camera view with same settings in XSI view port so how
> > can I have frames after render a scene with keeping
> > proportion of the frame and get frames after final render
> > with for example 730 586 a little bit more resolution to keep
> > the motion blur artifacts out of range of my frames ?
> >
> >
> >
> > Thanks.
> >
> > ---
> > Unsubscribe? Mail Majordomo(at)Softimage.COM with the following
> > text in body:
> > unsubscribe xsi
>
> ---
> Unsubscribe? Mail Majordomo(at)Softimage.COM with the following text in body:
> unsubscribe xsi 
///////////////////////////////////////////////////////////// 
// 
// ExpandView.js.  
//  
// Expand view from camera by adding pixels to the  
// size of the render output, adjusting Camera FOV to compensate. 
// ie, an image rendered after the effect has been applied will
//composite 
// over one rendered before and still fit exactly. 
// 
// User inputs extra pixel resolution, dX, the value of which is added 
// to either side of the image. ie, a value of 100 will increase the x 
// resolution of the rendered image by 200 pixels. -ve values will work,
// reducing image size and fov. 
// 
// Kim Aldis, 2003 
// 
// 
///////////////////////////////////////////////////////////// 

var oPass = getcurrentpass(); 
var oCam = getvalue( oPass + ".RenderOptions.PassCamera" ); 

var FovType = getvalue( oCam + ".camera.fovtype" ); // 0 = vertical, 1=horizontal 
var fov = getvalue( oCam + ".camera.fov" ); 
var aspect = GetValue( oPass + ".RenderOptions.PictureRatio" ); 
var pixratio = GetValue( oPass + ".RenderOptions.PixelRatio" ); 
var xRes = getvalue( oPass + ".RenderOptions.CameraXres" ); 
var yRes = getvalue( oPass + ".RenderOptions.CameraYres" ); 


// vertical or horizontal FOV 
if ( FovType == 0 ) { 
   fov *= aspect; 
} 
fov /= 2; 
xRes /=2; 

var dX = Dialog(); 

var D = xRes / Math.tan(fov * Math.PI/180); 

var newFov = Math.atan((xRes + dX)/D) * 180/Math.PI * 2; 

if ( FovType == 0 ) { 
    newFov /= aspect; 
} 

logmessage( "New fov = " + newFov ); 

Setvalue( oCam + ".camera.fov", newFov ); 

setvalue( oPass + ".RenderOptions.CameraXres", (xRes + dX)*2 ); 
setvalue( oPass + ".RenderOptions.CameraYres", (xRes + dX)*2 / aspect *
pixratio ); 


function Dialog() { 

   var oRoot = ActiveProject.ActiveScene.Root;  

   var myPset= oRoot.AddProperty( "Custom_parameter_list", false,
"ExpandView" ); 

   var odX = myPset.AddParameter2( "dX" , siUInt4, 50, 1, 200,null,
null, siClassifUnknown, 0, "dX", "Pixels to add to each side in X" );  
    
   // Show the ppg 
   InspectObj( myPset,"","ExpandView" ,siModal ); 
       return odX.value; 
   deleteobj( myPset );  


 
 
}