gamedevlists-windows

[GD-Windows] .NET main loop

[tweety <mi...@sy...>]

Sorry if this is OT, and if it is, please redirect (IIS joke :) ) to the
appropiate list.
 
I'm writing a managed dx9 app and, coming from the c++ world (and seeing the
sdk samples), my main loop is:
 
MainForm form=new MainForm();
engine.Init(form);
while(form.Created)
{
  engine.Update();
  engine.Render();
  Application.DoEvents();
}
engine.Dispose();
 
But I read in some blog that DoEvents is bad because it allocates ~200bytes
per call (kinda a lot), forcing the form class into gen1 garbage collection.
Now I'm asking you: what's the best way to do it?
 
----------------------------------
Peace and love,
Tweety
mi...@sy... - twe...@us...
YahooID: tweety_04_01

Re: [GD-Windows] .NET main loop

[Jacobo R. <ffe...@ty...>]

You have an alternative method to do the main loop. You can insert a=20
delegate that executes in the idle time of the form. Here are an example=20
but it's write on C# (I use C++ managed too, but with opengl instead dx)

http://xplsv.com/blogs/devdiary/
To find the section quickly: CTRL + F and search for "static void main"

Jacobo Rodr=EDguez Villar

Proyectos en desarrollo:

http://www.typhoonlabs.com



tweety wrote:

> Sorry if this is OT, and if it is, please redirect (IIS joke :) ) to=20
> the appropiate list.
> =20
> I'm writing a managed dx9 app and, coming from the c++ world (and=20
> seeing the sdk samples), my main loop is:
> =20
> MainForm form=3Dnew MainForm();
> engine.Init(form);
> while(form.Created)
> {
>   engine.Update();
>   engine.Render();
>   Application.DoEvents();
> }
> engine.Dispose();
> =20
> But I read in some blog that DoEvents is bad because it allocates=20
> ~200bytes per call (kinda a lot), forcing the form class into gen1=20
> garbage collection.
> Now I'm asking you: what's the best way to do it?
> =20
> ----------------------------------
> Peace and love,
> Tweety
> mi...@sy... <mailto:mi...@sy...> -=20
> twe...@us...=20
> <mailto:twe...@us...>
> YahooID: tweety_04_01

RE: [GD-Windows] .NET main loop

[tweety <mi...@sy...>]

Thanks. I've been looking for the idle event for some time now :)

----------------------------------
Peace and love,
Tweety
mi...@sy... - twe...@us...
YahooID: tweety_04_01

=20

-----Original Message-----
From: gam...@li...
[mailto:gam...@li...] On Behalf Of
Jacobo Rodriguez
Sent: February 18, 2004 2:23 AM
To: gam...@li...
Subject: Re: [GD-Windows] .NET main loop

You have an alternative method to do the main loop. You can insert a
delegate that executes in the idle time of the form. Here are an example =
but
it's write on C# (I use C++ managed too, but with opengl instead dx)

http://xplsv.com/blogs/devdiary/
To find the section quickly: CTRL + F and search for "static void main"

Jacobo Rodr=EDguez Villar

Proyectos en desarrollo:

http://www.typhoonlabs.com



tweety wrote:

> Sorry if this is OT, and if it is, please redirect (IIS joke :) ) to=20
> the appropiate list.
> =20
> I'm writing a managed dx9 app and, coming from the c++ world (and=20
> seeing the sdk samples), my main loop is:
> =20
> MainForm form=3Dnew MainForm();
> engine.Init(form);
> while(form.Created)
> {
>   engine.Update();
>   engine.Render();
>   Application.DoEvents();
> }
> engine.Dispose();
> =20
> But I read in some blog that DoEvents is bad because it allocates=20
> ~200bytes per call (kinda a lot), forcing the form class into gen1=20
> garbage collection.
> Now I'm asking you: what's the best way to do it?
> =20
> ----------------------------------
> Peace and love,
> Tweety
> mi...@sy... <mailto:mi...@sy...> -=20
> twe...@us...
> <mailto:twe...@us...>
> YahooID: tweety_04_01



-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id438&op=3Dick
_______________________________________________
Gamedevlists-windows mailing list
Gam...@li...
https://lists.sourceforge.net/lists/listinfo/gamedevlists-windows
Archives:
http://sourceforge.net/mailarchive/forum.php?forum_idU5

[GD-Windows] Direct3D 8.0 texture stage states

[Jon W. <hp...@mi...>]

We're porting an OpenGL renderer to Direct3D 8.0.

The documentation in concordance with the device caps for a GeForce2 claim
that you can configure up to 8 texture stage states, but you can only bind
two textures. We have a specific texturing set-up that in OpenGL looks like
this:

Texture0 \
          LERP \
Texture1 /      MODULATE -> done
       Diffuse /

This uses 2 texture environments on OpenGL, but it appears that DirectX 8
for fixed-function hardware cannot route two textures to one texture stage
state. Thus, we want to use three stage states, in the following
configuration:

Texture0 \
          SELECT1 \
                   LERP \
         Texture1 /      MODULATE -> done
                Diffuse /

We can get the first two stages to work fine, but as soon as we turn on the
third stage, the operations from the first two stages disappear, and we get
solid-white diffuse lit geometry. Note that we get that, even if we choose
SELECTARG1 for the operation for the third stage state (i e stage state
index 2).

We are disabling the stage state with index 3, just to make sure that we've
gotten nothing wrong. However, no matter what we do, we can't make this
work. We've tried both debug and release DirectX 9.0b runtime (can't
downgrade on the development machines to try with 8.0 proper).

Right now, we're feeling pretty glum. Any ideas?

Cheers,

			/ h+

RE: [GD-Windows] Direct3D 8.0 texture stage states

[Daniel V. <vo...@ep...>]

Jon, you're best off contacting NVIDIA devrel about the issue as there are
only a handful 3 stage setups that work on GeForce 1/2 class hardware. Tom's
blog <http://tomsdxfaq.blogspot.com/> has a little blurb on the issue.

-- Daniel, Epic Games Inc.  

> -----Original Message-----
> From: gam...@li... 
> [mailto:gam...@li...] On 
> Behalf Of Jon Watte
> Sent: Tuesday, March 02, 2004 9:19 PM
> To: gam...@li...
> Subject: [GD-Windows] Direct3D 8.0 texture stage states
> 
> 
> We're porting an OpenGL renderer to Direct3D 8.0.
> 
> The documentation in concordance with the device caps for a 
> GeForce2 claim
> that you can configure up to 8 texture stage states, but you 
> can only bind
> two textures. We have a specific texturing set-up that in 
> OpenGL looks like
> this:
> 
> Texture0 \
>           LERP \
> Texture1 /      MODULATE -> done
>        Diffuse /
> 
> This uses 2 texture environments on OpenGL, but it appears 
> that DirectX 8
> for fixed-function hardware cannot route two textures to one 
> texture stage
> state. Thus, we want to use three stage states, in the following
> configuration:
> 
> Texture0 \
>           SELECT1 \
>                    LERP \
>          Texture1 /      MODULATE -> done
>                 Diffuse /
> 
> We can get the first two stages to work fine, but as soon as 
> we turn on the
> third stage, the operations from the first two stages 
> disappear, and we get
> solid-white diffuse lit geometry. Note that we get that, even 
> if we choose
> SELECTARG1 for the operation for the third stage state (i e 
> stage state
> index 2).
> 
> We are disabling the stage state with index 3, just to make 
> sure that we've
> gotten nothing wrong. However, no matter what we do, we can't 
> make this
> work. We've tried both debug and release DirectX 9.0b runtime (can't
> downgrade on the development machines to try with 8.0 proper).
> 
> Right now, we're feeling pretty glum. Any ideas?
> 
> Cheers,
> 
> 			/ h+
> 
> 
> 
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
> a free DVD software kit from IBM. Click Now!
> http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
> _______________________________________________
> Gamedevlists-windows mailing list
> Gam...@li...
> https://lists.sourceforge.net/lists/listinfo/gamedevlists-windows
> Archives:
> http://sourceforge.net/mailarchive/forum.php?forum_id=555
> 

RE: [GD-Windows] Direct3D 8.0 texture stage states

[Jon W. <hp...@mi...>]

Thanks all. The surprising thing is that what I'm doing is almost exactly
the same thing as mentioned in the examples: add a modulate(current,diffuse)
as the third stage. The other surprising thing is that this works fine on
OpenGL (and, in fact, you can enable a large number of general combiners on
a GF2 in OpenGL). We're using very current drivers (but we're targeting back
to version 28.xx, 'cause that's what Dell shipped for one whole YEAR).

Multi-passing really isn't much of an option for us. We're already REALLY
tied for CPU, as we assumed hardware transform a long time ago, but the mass
market still is stuck in the SuperSavage and i845 era. We also have a
physics/networking system which requires a fixed update rate, leaving
precious little CPU for graphics on min-spec hardware. If there were
something like LockArraysEXT() to magically re-use transformed data for
multi-passing, maybe it could be made to work, but something like
ProcessVertices() doesn't let use re-use the card-specific set-up (texture
interpolation values, etc).

Perhaps it gets confused by the LERP triadic in the second stage (which uses
TEXTURE|REPLICATE_ALPHA for ARG0). Or perhaps I'm not setting alpha in all
three stages (but I think I am). I'll investigate some more, and ask our
NVIDIA person. Thanks for the pointers, everyone!

Cheers,

				/ h+


-----Original Message-----
From: gam...@li...
[mailto:gam...@li...]On Behalf Of
Daniel Vogel
Sent: Wednesday, March 03, 2004 2:02 AM
To: gam...@li...
Subject: RE: [GD-Windows] Direct3D 8.0 texture stage states


Jon, you're best off contacting NVIDIA devrel about the issue as there are
only a handful 3 stage setups that work on GeForce 1/2 class hardware. Tom's
blog <http://tomsdxfaq.blogspot.com/> has a little blurb on the issue.

-- Daniel, Epic Games Inc.

> -----Original Message-----
> From: gam...@li...
> [mailto:gam...@li...] On
> Behalf Of Jon Watte
> Sent: Tuesday, March 02, 2004 9:19 PM
> To: gam...@li...
> Subject: [GD-Windows] Direct3D 8.0 texture stage states
>
>
> We're porting an OpenGL renderer to Direct3D 8.0.
>
> The documentation in concordance with the device caps for a
> GeForce2 claim
> that you can configure up to 8 texture stage states, but you
> can only bind
> two textures. We have a specific texturing set-up that in
> OpenGL looks like
> this:
>
> Texture0 \
>           LERP \
> Texture1 /      MODULATE -> done
>        Diffuse /
>
> This uses 2 texture environments on OpenGL, but it appears
> that DirectX 8
> for fixed-function hardware cannot route two textures to one
> texture stage
> state. Thus, we want to use three stage states, in the following
> configuration:
>
> Texture0 \
>           SELECT1 \
>                    LERP \
>          Texture1 /      MODULATE -> done
>                 Diffuse /
>
> We can get the first two stages to work fine, but as soon as
> we turn on the
> third stage, the operations from the first two stages
> disappear, and we get
> solid-white diffuse lit geometry. Note that we get that, even
> if we choose
> SELECTARG1 for the operation for the third stage state (i e
> stage state
> index 2).
>
> We are disabling the stage state with index 3, just to make
> sure that we've
> gotten nothing wrong. However, no matter what we do, we can't
> make this
> work. We've tried both debug and release DirectX 9.0b runtime (can't
> downgrade on the development machines to try with 8.0 proper).
>
> Right now, we're feeling pretty glum. Any ideas?
>
> Cheers,
>
> 			/ h+
>
>
>
> -------------------------------------------------------
> SF.Net is sponsored by: Speed Start Your Linux Apps Now.
> Build and deploy apps & Web services for Linux with
> a free DVD software kit from IBM. Click Now!
> http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
> _______________________________________________
> Gamedevlists-windows mailing list
> Gam...@li...
> https://lists.sourceforge.net/lists/listinfo/gamedevlists-windows
> Archives:
> http://sourceforge.net/mailarchive/forum.php?forum_id=555
>



-------------------------------------------------------
SF.Net is sponsored by: Speed Start Your Linux Apps Now.
Build and deploy apps & Web services for Linux with
a free DVD software kit from IBM. Click Now!
http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click
_______________________________________________
Gamedevlists-windows mailing list
Gam...@li...
https://lists.sourceforge.net/lists/listinfo/gamedevlists-windows
Archives:
http://sourceforge.net/mailarchive/forum.php?forum_id=555