Hydrax v0.4 - New version released + Editor!

Xavyiy · Post by **Xavyiy** » Tue Apr 29, 2008 7:53 am

@skwurp
Thanks

!

You can edit this lines in MaterialManager.cpp to fix the CG(Cg bug I think...) reflection bug under OpenGL:

"uniform sampler1D    uFresnelMap      : register(s" + Ogre::StringConverter::toString(TexNum) + ")";

by

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"uniform sampler2D    uFresnelMap      : register(s" + Ogre::StringConverter::toString(TexNum) + ")";

and:

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"float fresnel = tex1D(uFresnelMap,dotProduct);\n" +

by

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"float fresnel = tex2D(uFresnelMap,float2(dotProduct,dotProduct));\n" +

This must fix the reflections bug, try to change this lines, you must feel the difference

!

P.D.: I'm going to update the demo project to allow linux support !

Xavi.

skwurp · Post by **skwurp** » Tue Apr 29, 2008 11:41 am

Hey Xavyiy,

I tried your fix for the Cg bug and it works great!

Before the fix:

After the fix:

By the way, compiling the Hydrax library with gcc in Linux gives a warning for some of the source code files:

Code: Select all

warning: no newline at end of file

It doesn't really matter (only a warning), but I thought I'd point it out anyway.

Post by **tuan kuranes** » Tue Apr 29, 2008 12:30 pm

Just wondering if you saw the long and rather well explained Screen Space Water shader topic on gamdev. Specially nice as it can be further accelearated cached using a Real-Time Reprojection Cache if performance begins to give problems.

Xavyiy · Post by **Xavyiy** » Tue Apr 29, 2008 1:16 pm

@skwurp
Good

!

@tuan kuranes
Yes, I've seen this topic on gamedev some time ago, but actually Hydrax approach is very very different from the Screen-Scace-Water approach.
Hoverwer I've thought some ways of improve performance like calculating normals on the GPU, in order to obtain same water quality with the 25/30% of actually vertex.

captnoord · Post by **captnoord** » Wed Apr 30, 2008 11:09 am

I don't want to spoil the fun but the CG fix it does'nt seem to work for me.
before

after

i'm running this on a Asus G1s
2.2 ghz dual core
NVIDIA GeForce 8600M GT 256Mb DDR3

and because I am relatively new to shaders I have no clue why this is happening.

Xavyiy · Post by **Xavyiy** » Wed Apr 30, 2008 1:43 pm

@captnoord
Are you using OpenGL render plugin? this fix os only for Opengl, cg and directx works well without any fix.

If you're running it under OGL, try to update your card drivers.

I've tried it with your graphic card(only I've tried under DX) and it works pretty fine.

P.D.: Make sure you're using CG 2.0 and not 1.5!

captnoord · Post by **captnoord** » Wed Apr 30, 2008 3:04 pm

Thanks for the quick reply
Yep I am using Opengl,
I updated my drivers ( first thing... )
and I updated my cg.dll
my version of the cg.dll is now 2.0.0.8
running vista sp1
nvidia driver version 174.74
ogre version 1.4.5
Hmmm I check some more....
maybe I just f*ucked up....

P.D.: Make sure you're using CG 2.0 and not 1.5!

with this you also mean that I should update Plugin_CgProgramManager.dll to that version?
I think so...... we will see...

Xavyiy · Post by **Xavyiy** » Wed Apr 30, 2008 3:11 pm

Can you record a 20-30 sec video of the problem?
Are you using a precompiled SDK? just to check CG version, it seems very strange.

captnoord · Post by **captnoord** » Wed Apr 30, 2008 3:47 pm

I can't seem to load the opengl version of the precompiled bins

But I can tell you this, directx stuff works proper... that is'nt the problem
its when I change to opengl these problems accur...
I will make you a movie...

syedhs · Post by **syedhs** » Wed Apr 30, 2008 3:51 pm

OpenGL on vista? Could it be the problem? Maybe you can check your log too, if you spot any peculiar error then the problem will be more descriptive.

Xavyiy · Post by **Xavyiy** » Wed Apr 30, 2008 3:53 pm

syedhs wrote:OpenGL on vista? Could it be the problem?

No, I use vista and it works pretty fine(With CG/OpenGL bug fix).

Extrange

captnoord · Post by **captnoord** » Wed Apr 30, 2008 4:00 pm

syedhs wrote:OpenGL on vista? Could it be the problem? Maybe you can check your log too, if you spot any peculiar error then the problem will be more descriptive.

its one of the first things I do. Checking the log. But this one is'nt in the log. But atm i'm bussy with "work" I will get back on this in a few hours.

Xavyiy · Post by **Xavyiy** » Wed Apr 30, 2008 8:24 pm

A little video that I've recorded some minutes ago, a little transition from overwater to underwater and vice versa.

Download link: http://rapidshare.com/files/111575309/P ... 0.wmv.html

Hope you like it!

KungFooMasta · Post by **KungFooMasta** » Wed Apr 30, 2008 10:39 pm

So whats left to work on for the underwater portion?

Xavyiy · Post by **Xavyiy** » Wed Apr 30, 2008 11:49 pm

KungFooMasta wrote:

So whats left to work on for the underwater portion?

Uff.. for my expectatives, a lot lot lot of work, like god rays(I have found a solution for this, but it's only SM 3.0,no 2.0) underwater light scatering(I need a paper!!), variable visibility(no only based on depth, like fog visibility), etc... but for the moment the development status is good

juedno · Post by **juedno** » Fri May 02, 2008 11:59 am

hi Xavyiy, can you make a Solution of vs2003(vc7), because my project is under vs2003 and update to vs8 is impossible for a long time, but i really want to use Hydrax, it's so cool

captnoord · Post by **captnoord** » Fri May 02, 2008 1:07 pm

I will post my corrected vc8 sollution today.... I don't have vc7 here.....
but still working out a few things...
and I still have the opengl bug... i'm at a lan-party atm and I will get you your movie...

MessiahAndrw · Post by **MessiahAndrw** » Sat May 03, 2008 5:59 am

How do I delete Hydrax and clean up after a scene? I've tried:
delete m_hydrax;

but this causes a breakpoint in perlinpg.cpp in PerlinPG::~PerlinPG() at the delete line here:

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if (r_noise)
		{
			delete [] r_noise;
		}

Xavyiy · Post by **Xavyiy** » Sat May 03, 2008 11:34 am

MessiahAndrw wrote:How do I delete Hydrax and clean up after a scene? I've tried:
delete m_hydrax;

but this causes a breakpoint in perlinpg.cpp in PerlinPG::~PerlinPG() at the delete line here:
Code: Select all
if (r_noise)
		{
			delete [] r_noise;
		}

I haven't optimiced Hydrax destruction at the moment, only v0.1 works fine with a simple delete mHydrax; You can fix the bugs just following the breakpoints or wait for 0.4, It's on my plans fix al destructor bugs.

P.D.: I'm working on light shafts / god rays for underwater rendering, this night I'm going to post a simple demo application and after it, implement it in hydrax! Xavi.

fifi · Post by **fifi** » Sat May 03, 2008 4:40 pm

I can't wait for new demo!

It will be great!

Xavyiy · Post by **Xavyiy** » Sat May 03, 2008 4:46 pm

fifi wrote:I can't wait for new demo! It will be great!

It's just a simple demo application of volumetric light shafts with shadows support. I'm going to post it in showcase forum, it's non-hydrax related, but I've done it for understand the concept, give a little piece of software to Ogre community and, for sure, implement it in Hydrax!

Edit: http://www.ogre3d.org/phpBB2/viewtopic.php?t=41143

fifi · Post by **fifi** » Sun May 04, 2008 9:13 am

Yeah, great job, it's awesome! Light Shafts in Hydrax will be great! I can't wait for version 0.4!

tdev · Post by **tdev** » Sun May 04, 2008 11:11 pm

great progress Xavyiy! you are pretty fast

may i ask what GUI you are using in that example video? I really like its menu system.

dominic1988 · Post by **dominic1988** » Mon May 05, 2008 4:10 am

captnoord wrote:I don't want to spoil the fun but the CG fix it does'nt seem to work for me.
before

after

i'm running this on a Asus G1s
2.2 ghz dual core
NVIDIA GeForce 8600M GT 256Mb DDR3

and because I am relatively new to shaders I have no clue why this is happening.

are you updating your render target every frame? Cause that kind of problem seem to be caused by not updating your render target every frame, are you using the test app provided in hydrax. If not, try using this
Ogre::Root::getSingletonPtr()->renderOneFrame() before updating hydrax

dominic1988 · Post by **dominic1988** » Wed May 07, 2008 4:59 am

just a question, does my camera->lookAt actually affect how hydrax scene is rendered?