3 rt and 1 fire shader(HLSL)

BlindSide · Post by **BlindSide** » Mon May 14, 2007 12:05 pm

roxaz wrote:this requieres pixel shaders right?

Yes

Most of them need PS 2.0 except for the distortion which appearsto be PS 1.4 (1.4 is commonly found on the Radeon 9200)

omaremad · Post by **omaremad** » Mon May 14, 2007 12:47 pm

if you calculate all your offsets in the vertex shader and send them via texcoords(each texcoord layer has 4 floats so thats allot of data you can send) you are no longer using whats called dependent texture reads which are slow and limited on pre 2.a hw (especially ati hw). The dependent tex reads are textures with texcoords made in the pixel shader.

however if you are using a texture to create the offsets then you can't do that so try and limit the dependent tex reads to < 4.

if you do that you can lower your shader model.

roxaz · Post by **roxaz** » Mon May 14, 2007 2:07 pm

belfegor wrote:Not sure what you mean.

I ment hardware support

BlindSide wrote:
roxaz wrote:this requieres pixel shaders right?
Yes

Most of them need PS 2.0 except for the distortion which appearsto be PS 1.4 (1.4 is commonly found on the Radeon 9200)

bad... sorry for little offtopic but could someone tell me what can i make with vertex shaders and with pixel shaders? I basicly know what can i make, but i want to know capabilities of vertex shaders only, and pixel shaders only. You see, my video card does not support pixel shaders so i want to know what limits are for me there in graphics..

belfegor · Post by **belfegor** » Wed May 16, 2007 10:46 am

Ok, i will try to calculate ofssets in vertex shader and send them via texcoords to pixel shader as omaremad proposed
and see if it can work below ps 2.0.It should be simple so you can try it yourself.If i get it to work ill post update here.

roxaz
What gfx card do you have?If you can, consider buying new gfx card?
I have AGP NVidia 6200 its preaty cheap, costs me about 50 euro's.

BMF · Post by **BMF** » Wed Sep 05, 2007 5:18 pm

Seems to apply the blur effect even to stuff that's not moving, can that be fixed?

BlindSide · Post by **BlindSide** » Wed Sep 05, 2007 7:16 pm

No it cannot be "fixed" because its not a problem to begin with. This is gaussian and radial blur not Motion Blur.

roxaz wrote: bad... sorry for little offtopic but could someone tell me what can i make with vertex shaders and with pixel shaders? I basicly know what can i make, but i want to know capabilities of vertex shaders only, and pixel shaders only. You see, my video card does not support pixel shaders so i want to know what limits are for me there in graphics..

You can do some pretty cool things, like manipulate vertices. Here is an example of a vertex shader in action (Ignore shinniness on material that is done by pixel shader):

See it is simple I just run a sin function on the vertices set to a time constant and the mesh wiggles about. You can also implement hardware skinning on vertex shader alone. Basically anything to manipulate vertices (Including the vertex colour).

BMF · Post by **BMF** » Wed Sep 05, 2007 11:35 pm

Excuse me? On page two of this topic you'll find he made a conversion of TGM's motion blur to work with Direct3D. That's the motion blur I'm talking about.

belfegor · Post by **belfegor** » Fri Sep 07, 2007 9:56 am

BMF wrote:Seems to apply the blur effect even to stuff that's not moving, can that be fixed?

No, this code can't do what you whant. It blurs all stuff in view.
I think you need more like this:

http://irrlicht.sourceforge.net/phpBB2/ ... php?t=2179

christianclavet · Post by **christianclavet** » Sat Oct 27, 2007 4:58 am

Hi, Do you think this code could do the same as SIO2 demo (Motion blur)?

I would like to have a way to do the same as in SIO2 Motion Blur demo (Was exactly the way I want and it's fast).

belfegor · Post by **belfegor** » Sat Oct 27, 2007 9:39 am

Hi, Do you think this code could do the same as SIO2 demo (Motion blur)?

Dont know. Didn't tried that demo.

I would not use this one for moving object motion trail.
Instead i could use it for example when player is hit (damaged).

sio2 · Post by **sio2** » Sat Oct 27, 2007 10:25 am

I just tried Belfegor's Motion Blur code from page 2 with Irrlicht 1.3.1. It seemed to work OK with a few nudges. The major difference with my version is that I use floating-point render targets.

With Irrlicht 1.3.1 I couldn't use 800x600 as the rendertarget size - I had to reduce it to 512x512, with the resultant stretch to 800x600. I got around 2000fps on an 8800 but enabling vsync gives a bit more control over the blur strength since it isn't being adjusted based on frame rate (as I do in my own demo). Another difference is that I have the option to use MRT to remove one of the passes.