. /../Lino Ray Tracer/ 1234567
doing pushups
written by Megagun on Jul 17, 2005 11:39
Barebones said:
And BTW, you did change your library to construct 3-D Beziers, in order to do that picture. Didn't you?
I don't think that's really needed.. Just generate one bezier for the X-axis, and one for the Y-axis (/Z axis, whatever you prefer), and then morph them into one..

Judging from the picture, it seems like he didn't use 3dstuffs at all..
written by Barebones on Jul 17, 2005 12:08
Hmm... I'd have to check if one bezier x (t), y (t) and a second bezier x ' (t), z (t) will have x (t) = x ' (t), as long as the control points share the same X coordinates (i.e, be the proyections of 3-D points into the XY and XZ planes resp.). It sounds feasible. *Yum yum food*
written by Cryoburner on Jul 18, 2005 21:49
I whipped together another render today, this time making use of my fractal heightmap library to create a blob of spheres. In fact, there are 1024 spheres, 2 planes, 4 lights, and 5 levels of reflection used in this scene. It took nearly 20 minutes to render on my 3500+. : D

cd/pngs/Cryoburner/linortblob (166 Kb)
whoosh
written by Buuks on Jul 18, 2005 21:50
This looks like a very impressive piece of software.
written by Barebones on Jul 18, 2005 21:50
The devouring mass of spheres. Holy number crunching terror, batman.
omg! toadstoolz!
written by Dumbum on Jul 19, 2005 08:59
This piece of software won't work for me...

When I start it I see nothing but a zone at the centre of my screen where my mouse pointer disappears
kamikazemadman
written by Peterpaul kl h on Jul 19, 2005 09:24
Dumbum said:
This piece of software won't work for me...

When I start it I see nothing but a zone at the centre of my screen where my mouse pointer disappears
RTFT! I suggest that you read the start of this thread...

You'll find out that nothing is supposed to happen, but that after a certain amount of time a new file pops up in the folder from where you run the program, this is the raytraced image. Find out for yourself how you can view it.
HINT: there are pointers for that in this thread.
deep into the jungle
written by Ponche on Jul 19, 2005 20:32
Nice renderings Cryo! I specially like the bezier one. I have added your suggestion about the scan line procedure. As always thanks for the suggestions.
written by Cryoburner on Jul 21, 2005 07:34
Here's another rendering that I made right after posting the last one. I didn't upload this one right away, since the file size of the original Png was around 300k, which is a bit on the large side for a 640x480 image. While I didn't want to use lossy compression, this version is a more reasonably sized and mildly compressed 150k Jpeg.

This scene features 1024 spheres, 2 planes, 5 lights, and 5 levels of reflection. Much like the last one, it took around 20 minutes to render. A number of the spheres are out of direct view, but you can see them reflected in the others. Once again, I used my fractal heightmap library to set their positions.

cd/jpgs/Cryoburner/linortorbs2 (152 Kb)
doing pushups
written by Megagun on Jul 21, 2005 09:41
nice... but.. they look distorted to the left and right of the image.. :S
lost, not forgotten
written by Alex on Jul 21, 2005 10:19
It's wonderful!
Alright, it's a raytracer, alright, a re-invention of the wheel... but raytracers ARE wonderful things.
So all thumbs up!
deep into the jungle
written by Ponche on Jul 21, 2005 11:20
Well, one difference... Linoleum.
lost, not forgotten
written by Alex on Jul 21, 2005 12:40
YEAH, too.
Which is admittedly what I love the most of this one...
written by Cryoburner on Jul 21, 2005 20:05
I noticed it already mentioned in the chat logs, but the corner distortion is simply the result of using a wide field of view, which is equally visible in photography. You'll notice the same effect in other 3D software, like terragen, 3DSMax, etc. If I didn't want it to be noticeable, I would have moved the camera 10 or 100 times as far away and adjusted the projected screen's distance accordingly to create a zoomed telephoto view of a similar area with less distortion.
deep into the jungle
written by Ponche on Aug 09, 2005 11:11
Version 1.1: Mainly addition is refractions, which may be buggy, i don't know, tell me if you find something. Added also a scanline procedure, suggested by Cryoburner. Also i have separated materials from primitives.

cd/zips/Ponche/lrt11 (14 Kb)

Edit: A shot for those too lazy to download and compile
If you can't see anything new, the center ball is refracting light coming from behind, so you can see the mirror ball through it.

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