Click here for EyeGasm (RL GI) [FULL SRC && DEMO AVA

devsh · Post by **devsh** » Thu Dec 02, 2010 6:02 pm

THE GRAND DEMO

Now my demo shows global illumination with changing light conditions (sun a.k.a directional light) although without shadow mapping. Point and spot lights would be possible but only with another set of 9 coefficients coding for depth.

http://project-ninja-star.googlecode.com/files/GIv2.zip

Sorry for the choice of words but "I'm going to rape UR eyes and make you **gasm over" my snippet/example

Yes what you see here is real time global illumination using spherical harmonix!

Will post more details+screenies in a bit

devsh · Post by **devsh** » Thu Dec 02, 2010 8:31 pm

sorry i didnt have time to crop these

http://img41.imageshack.us/img41/8415/s ... ot1401.png
http://img715.imageshack.us/img715/7825 ... hot13k.png
http://img641.imageshack.us/img641/8128 ... hot12q.png http://img72.imageshack.us/img72/1213/screenshot11j.png
http://img822.imageshack.us/img822/1261 ... hot10j.png
http://img199.imageshack.us/img199/6055 ... shot9b.png
http://img839.imageshack.us/img839/4230 ... shot8p.png
http://img684.imageshack.us/img684/9235 ... shot7h.png
http://img207.imageshack.us/img207/14/screenshot6sk.png
http://img101.imageshack.us/img101/8392 ... hot5en.png
http://img638.imageshack.us/img638/530/ ... hot4uz.png
http://img23.imageshack.us/img23/6627/screenshot3sf.png

macron12388 · Post by **macron12388** » Thu Dec 02, 2010 8:33 pm

Awesome! Glad to see you got it working.

devsh · Post by **devsh** » Thu Dec 02, 2010 8:39 pm

Yh its pretty sweet when you get it working

Lonesome Ducky · Post by **Lonesome Ducky** » Thu Dec 02, 2010 9:54 pm

Eh, here I am with clean pants. I was hoping for something a little more... exciting. Interesting, but could you crop the pictures to your actual window? It's distracting and takes up way too much space with your IDE in the background as well. (Yes, I'm fully aware that you said you had no time to crop them, but it's stretching the forums and it'll be very hard to read replies over a line. That horizontal scrollbar is the spawn of the devil.)

devsh · Post by **devsh** » Thu Dec 02, 2010 10:03 pm

how exciting did you expect?

this is WIP, I will only consider it HALF-DONE when I set up a "deferred render" or a pass which records the normal and depth of all pixels and inject SH into the scene per pixel

slavik262 · Post by **slavik262** » Thu Dec 02, 2010 10:12 pm

My pants are clean as well. It's cool, but I imagine it being extraordinarily expensive and not applicable in a real-time game scenario.

I also couldn't agree more with

Lonesome Ducky wrote:Interesting, but could you crop the pictures to your actual window? It's distracting and takes up way too much space with your IDE in the background as well. (Yes, I'm fully aware that you said you had no time to crop them, but it's stretching the forums and it'll be very hard to read replies over a line. That horizontal scrollbar is the spawn of the devil.)

Use thumbnails or crop them down. You should never have to scroll sideways on a forum.

devsh · Post by **devsh** » Thu Dec 02, 2010 10:23 pm

it is applicable Real Time, the level runs at 230FPS same as without GI... the spherical harmonic is only 27*4 bytes.... even with the level divided into a grid of 57*57*13 it still gives just over 4.3 mb I could make it even more defined if not for irrlicht's memory leaks when reading RTTs on CPU

You prebake the level and you can convert each cubemap (40*40*6*4), so the level looks as if you have covered it with 1.5GB worth of environment maps

I will take care of the images in a bit/replace them by a demo

Mel · Post by **Mel** » Thu Dec 02, 2010 10:24 pm

Looks great! good job! If you get to map the SH to the textures correctly, i'll clap ever more

Good luck.

fmx · Post by **fmx** » Thu Dec 02, 2010 10:35 pm

Looks interesting, I can't wait to try the demo to see the performance gains (or hits) for myself

devsh · Post by **devsh** » Thu Dec 02, 2010 10:35 pm

BEWARE OF THE DEMO!!!

http://project-ninja-star.googlecode.co ... _devsh.zip

devsh · Post by **devsh** » Thu Dec 02, 2010 11:03 pm

okay now it seems I only need to find and adapt the HDR image loader so I can finally stick my samples in a texture

slavik262 · Post by **slavik262** » Thu Dec 02, 2010 11:07 pm

You could always just export two textures. One would be the color and the other could be a per-pixel multiplier up to a certain maximum.

devsh · Post by **devsh** » Thu Dec 02, 2010 11:11 pm

Will not work

The main advantage is that with the ALL awesome SH atlas I can do PER Vertex interpolation and lookup whereas in this demo the interpolation is per object...

This approach has 2 pros:
1) More accurate lighting
2) object can be big (bigger than space between probes)

And 1 con:
1) the more geometry the more performance loss

Obviously my holy grail would be PER pixel GI... which would yield the same computational time/render time loss

I will raise the sysreq to SM 3.0 because I want to get 6/7 of the trilinear interpolation for free from the graphics card interpolating the 2d texture

slavik262 · Post by **slavik262** » Thu Dec 02, 2010 11:36 pm

Let me rephrase. Don't use two textures at runtime, but save your HDR texture as two images: a colormap and a multiplier map. Then, just recreate the HDR texture from the two.