IRRAGEN-Shader Based Procedural Terrain System

omaremad · Post by **omaremad** » Sun Feb 18, 2007 2:53 pm

Ok this release is not even version 0.0001, but i need criticisims since "beauty" is diffrent from person to person.
Ok what it does:

-Takes small art assets and procedurally maps them onto a terrain.
-Biologically correct grass growth.
-Infinite number of grass blades (this thing is bottlenecked by screen resolution rather than scene size or grass density)
-It looks pretty
-offers fast terrain lighting and bloom(without using any HDR pipelines!)

consumes two rendertargets.

STAY OFF THE GRASS the effect looks ugly at low distances from the camera.

also The LOD on the terrain makes it look bad, i think...

Start the demo on lowres(lightpower 1) first and please quote frame rates.

Its hard to post screens since jpegs artefactall the small details

demo(732kb)

http://www.megaupload.com/?d=HLPUHX36

Spintz · Post by **Spintz** » Sun Feb 18, 2007 3:15 pm

I click that link and I get taken to ebay...

monkeycracks · Post by **monkeycracks** » Sun Feb 18, 2007 3:19 pm

Spintz wrote:I click that link and I get taken to ebay...

Click the Skip This Ad button at the top right.

BlindSide · Post by **BlindSide** » Sun Feb 18, 2007 4:38 pm

Does this require any shaders if so what level?

omaremad · Post by **omaremad** » Sun Feb 18, 2007 4:54 pm

This is written in pure GLSL with no model 3 features so will probabbly need "shader model 2".

I will probabbly convert this to shader model 1 assembler when i get it finalised.

monkeycracks · Post by **monkeycracks** » Sun Feb 18, 2007 5:46 pm

Let us low-video card users know when ya get it done

Klasker · Post by **Klasker** » Sun Feb 18, 2007 5:56 pm

With my GeForce Go 7300 I'm getting around 50 fps in low res and around 17 fps in hi res. I'm running Vista which is not happy about OpenGL, so the FPS could be lowered because of that - I had to update my driver before I could even run it.

Phant0m51 · Post by **Phant0m51** » Sun Feb 18, 2007 6:10 pm

ATI Radeon Xpress 1150 - won't compile GLSL. Is this because my video card doesn't support the shaders?

omaremad · Post by **omaremad** » Sun Feb 18, 2007 6:25 pm

I get 30 on low res on a 6200 (only 2 pixel cores version) xp, i might manage to test this on a 7600 xp, ill just have to reach it. As for ati, its probably my bad casting habbits ill analyse any warnings from the compiler.

m_krzywy · Post by **m_krzywy** » Sun Feb 18, 2007 6:47 pm

can u re-up file i can't get em' through megaupload

SiriusCG · Post by **SiriusCG** » Sun Feb 18, 2007 6:51 pm

I get 78fps on my nVidia 7600gs/512M card in windowed mode...

BTW, I have to use the Task Manager and manually kill the app to get my mouse back...

omaremad · Post by **omaremad** » Sun Feb 18, 2007 8:48 pm

Was that low res or higf res? Anyway why is this so slow on other peoples cards? my cards runs it at 30 and its a allllllot weaker than those geforce 7's

for those who actually manage to run the effect i want your opnions too.

Anyway here is a picture of it:

luckymutt · Post by **luckymutt** » Mon Feb 19, 2007 5:41 am

On Low-Res, light power 3, I am getting around 170 fps
On Hi-Res, light power 3, I have around 40 fps

GeForce 7600 GS 512M

Looking good

omaremad · Post by **omaremad** » Mon Feb 19, 2007 4:54 pm

Im going to try and implement this effect in blender using material and composite nodes, this way our renders will be fast instead of relying on particles for grass.

omaremad · Post by **omaremad** » Wed Feb 21, 2007 12:37 am

Ok im nearly finished on the blender shader but the vector blur compositer seems broken here

(help anyone

with blender knowldge in cposite nodes) . Anyway if you want more volume to the grass change this line in nr.frag

Code: Select all

gl_FragColor = vec4(pow((normalize(Normal.xyz*offset)+Normal.xyz),2),0)*(rawNormal.y*2);

to

Code: Select all

gl_FragColor = vec4(pow((normalize(Normal.y*offset)+Normal.xyz),2),0)*(rawNormal.y*2);

now the grass sticks out more rather than following the contours of the terrain too much.