|
|
Realtime Motion Blur
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Realtime Motion Blur // Roundtable
Post by ivampretti // Jan 3, 2009, 2:21am
|
ivampretti
Total Posts: 151
|
Hi folks, I was wondering if is there an way of do that a realtime render to file motion blur. I need that for a project but its not nescesary to see it play in realtime, just in the render to file motion blur, so if anyone know some technique how to do it, please let me know.
I was wondering to do that rendering to file with an enormous frame rate than later use some video editor to do the motion blur. But I dont know how to do it without do it frame by frame with an image editor. Somebody know a better way?? |
Post by nowherebrain // Jan 3, 2009, 6:39am
|
nowherebrain
Total Posts: 1062
|
You can through a directX shader and render to texture, but I am not sure on the code...not much into shader programing...
I guess it could be accomplished by using a plane attached to the camera that renders the view to it's texture, apply an alpha blend to it and draw it late. Any shader guru's want to shed some light on this? |
Post by parva // Jan 3, 2009, 8:34am
|
parva
Total Posts: 822
|
motion blur is a postprocess effect so not possible yet in truespace.
I think also the best way is a video editing program.
Some of them have filters that add motion blur
or you do, like you said, render with less speed many more frames
and scale the speed later to a higher rate like 300% or alike. |
Post by transient // Jan 3, 2009, 3:11pm
|
transient
Total Posts: 977
|
Real-time dof would be very nice, too. I think you could do this in post by using Parva's Object Scene Depth shader on the objects in a separate pass. |
Post by jamesmc // Jan 3, 2009, 5:19pm
|
jamesmc
Total Posts: 2566
|
Interesting article on motion blur in direct X 9.
http://msdn.microsoft.com/en-us/library/bb147206(VS.85).aspx |
Post by ivampretti // Jan 3, 2009, 7:25pm
|
ivampretti
Total Posts: 151
|
Well, after all the great comments, I think that a post process in a video editor would be the easy way. But I dont want to built an animated scene thinking in a frame rate like 90frames/s. I want to do a scene as usually at 24 - 30 frames/s and then stretch the all animation later. Then we could use an video editor to blur the extra frames and adjust the frame rate. Any Ideas for an stretch all animation with loads of clips and tracks? |
Post by Asem // Jan 3, 2009, 8:48pm
|
Asem
Total Posts: 255
|
It would be possible if someone created a least a node that gave access to the framebuffer and MRT in which the sdk has to be used (if it was planned to be done through scripting) I think that it's the only thing missing that would give someone the ability to script it. Pretty much what caligari did by making a node that gave access to the render to texture. |
Post by nowherebrain // Jan 4, 2009, 5:36pm
|
nowherebrain
Total Posts: 1062
|
my way would work, but it would not include the first frame or so...and would slow the frame rate a bit. |
Post by jamesmc // Jan 4, 2009, 6:40pm
|
jamesmc
Total Posts: 2566
|
This is not tS, but thought you or a developer may want to look how other software does it. (video)
http://www.facebook.com/video/video.php?v=1011438766906 |
Post by ivampretti // Jan 6, 2009, 2:55am
|
ivampretti
Total Posts: 151
|
I was thinking and I have the algorithm for a postprocess motion blur, for using with the realtime render to file I would need to have access to control what frame It'll render, what I dont have any Idea of how to make it. But here is the algorithm:
number of passes: 4 for example
using half of frame to blur it!
> Render frame 1.00 with alpha set to 0.25;
> Render FRAME 1.17 same alpha 0.25 (0.5 / 3 = 0.17 half frame in 3 passes)
> Render Frame 1.33 again alpha 0.25
> Render Frame 1.5 alpha 0.25
Blend the four frames what will result in a no transparent frame
now we have the frame 1 with motion blur
the frame 2 is similar!
> Render frame 2.00 with alpha set to 0.25;
> Render FRAME 2.17 same alpha 0.25 (0.5 / 3 = 0.17 half frame in 3 passes)
> Render Frame 2.33 again alpha 0.25
> Render Frame 2.5 alpha 0.25
This is not possible even by hand because the render to file dont allow us to render a fractionary frame :(
If somebody help I could implement this, but I dont know how to do it, I dont have acess of what frame the realtime render to file will render! |
Post by ivampretti // Jan 7, 2009, 6:06am
|
ivampretti
Total Posts: 151
|
Im almost there, I just need to figure out how to export a bitmap from a Jscript Command! If you get the bimap atributte, there is a command save to file that I don know what variable it is asking for.
Bitmap.savetofile(var,str);
Thats the command, str I guess is the string of the location in the HD like "C:\MyDocuments". But this evil var :mad: I dont know what it is asking for, does anybody know that? |
Post by prodigy // Jan 7, 2009, 6:11am
|
prodigy
Total Posts: 3029
|
D3DView.RenderToFile('', '') ?? |
Post by ivampretti // Jan 7, 2009, 6:37am
|
ivampretti
Total Posts: 151
|
I dont know this D3DView.RenderToFile('', '') Prodigy, but seems nice. What are the arguments? |
Post by prodigy // Jan 7, 2009, 7:24am
|
prodigy
Total Posts: 3029
|
don't know either :p
I do some experiments with but without success... :confused: |
Post by Délé // Jan 7, 2009, 9:13am
|
Délé
Total Posts: 1374
|
Try this:
D3DView.RenderToFile('','auto');
I got that from Johny's cloth render script. Might want to check it out. I don't know how Johny figures all this stuff out, but I'm glad he does. :)
http://forums1.caligari.com/truespace/showthread.php?t=6043 |
Post by frootee // Jan 7, 2009, 9:21am
|
frootee
Total Posts: 2667
|
This is described in the SDK documentation.
The first parameter is the WinID for which the rendering is performed. Leave it blank, and the current selected window is rendered. That's the simplest approach anyway. :D
HRESULT IRiView3D::RenderToFile ( [in] VARIANT bsWinID,
[in] VARIANT bsMode
)
Render given D3D view to file.
Parameters:
bsWinID specifies the WinID for which the rendering is performed.
bsMode specifies the mode of the rendering ('auto' for immediate screen-shot using latest settings, empty string for settings dialog) |
Post by prodigy // Jan 7, 2009, 9:28am
|
prodigy
Total Posts: 3029
|
And here another way for Vray..
//Render what you see
function Execute(params)
{
OfflineRender.OpenView('',0,0);OfflineRender.Rende rScene('')
}
//Render Animation
OfflineRender.OpenView('',0,0);OfflineRender.Rende rAnimation('')
//Render Object
OfflineRender.OpenView('',0,0);OfflineRender.Rende rObject('') |
Post by ivampretti // Jan 7, 2009, 4:11pm
|
ivampretti
Total Posts: 151
|
Thanks folks, I had to go to some where but now Im back! I'll try this and post the result or another question :D |
Post by ivampretti // Jan 7, 2009, 6:03pm
|
ivampretti
Total Posts: 151
|
Ok here it comes. I tried the D3DView thing and there is a enormous problem to make the motion blur thing. D3DView.RenderToFile('','auto') just uses the render to file engine, is just like you press the button set the settings and press render button. Then we dont have access to render an fractionary frame to build the motion blur.
So I have an Idea to use the Render to Texture Scene. I just have to know how the "Maldito Infeliz Miseravel" SaveToFile(var, Str) of the "Common Data Package\Bitmap Data". Becase then we could use the especial camera to render it and save the texture (View) as a bitmap file to play with it!
But no, the evil SaveToFile command have to ask for a var that is not specified in the SDk docs :mad::mad::mad: Anybody?? |
Post by ivampretti // Jan 8, 2009, 2:04pm
|
ivampretti
Total Posts: 151
|
you got scared because of my moments of frustration? sorry, I was talking to the TS documentation, didnt want to be rude. Come Back Please I need you guys :D That question is killing me!:rolleyes:
I wont bite you, promess! :D:D |
|
