joonhyub

Ray tracing for Processing (Joons-Renderer)

in Library and Tool Development • 3 years ago

Update

June 2, 2013, joons-renderer v0.71 now supports Processing 2.0b9.

Hey guys,

I've written a library which enables users to ray-trace render their Processing sketches. It's based on Sunflow. I wrote it for personal use, but thought I could share.

Announcing joons-renderer:

Features

Code as you normally would in Processing, just ray-trace render the result with Sunflow renderer.
The library reads what's on Processing's display, and returns the exact same view, only rendered.
It supports:
- Textures
- Light sources
- Depth-of-field
- External file objects
- .. and others

Download
You can download it from http://code.google.com/p/joons-renderer/ with a bunch of examples and instructions.

Samples

Below is a 3D shape I generated using Processing only:

And below is a render of the above Processing geometry using my library (Mirrory texture):

I also made a short animation clip just to see how it works in animation (depth-of-field enabled):

Animation Test from Joon Hyub Lee on Vimeo.

Replies(35)

owaunandr..

Re: Ray tracing for Processing

3 years ago

This looks interesting. Do you have a download link for the library as yet ?

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

Got it uploaded. Please do try it.

jimmij

Re: Ray tracing for Processing

3 years ago

I am very interested!

...and ready to contribute.

PhiLho

Re: Ray tracing for Processing

3 years ago

Any relation to P5Sunflow? If not, perhaps you can outline the differences between the libraries.

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

Nope, I wrote it from scratch. Tried P5Sunflow, didn't really work, so I wrote my own.

The main differences are that:

1. It works with the latest version of P5.

2. It uses an external render template(an SC file), so all of Sunflow's functionalities are incorporated without compromise,

3. and having said that, it is a bit messier and not very well integrated with the P5 language.

I'll soon make it available on a Google code page for you to try.

lancegary

Re: Ray tracing for Processing

3 years ago

I am very interested too.

Lance

yelele_br..

Re: Ray tracing for Processing

3 years ago

I'm interested too.

monkstone

Re: Re: Ray tracing for Processing

3 years ago

Just tried it out on my linux box and there is path issue with the intermediate files, it is all Bill Gates fault, I guess I will need to compile the source, looks promising though.

andreas.s..

Re: Ray tracing for Processing [NOW DOWNLOADABLE]

3 years ago

hi, had the same issues as monkstone. so i tweaked your code a bit, and recompiled, hope you dont mind.

i added a system property file.separator instead of a hard coded windows file separator (\). i used the library template and uploaded a snapshot here http://www.sojamo.de/tmp/downloads/joons.zip

to edit the source of this template version, you either need eclipse ( To get started, have a look at the video screencast and follow the wiki posts "How To" and "Guidelines") or you can use ant (from the command line cd into the resources folder and execute ant, before that, make sure your build.properties inside the same folder are set accordingly)

a compiled version of the library is located inside folder distribution (distribution/joons-0.1.1/download/joons-0.1.1.zip)

andreas schlegel, http://www.sojamo.de

monkstone

Re: Re: Ray tracing for Processing [NOW DOWNLOADABLE]

3 years ago

Nice work andreas, I particularly like the way test sample is integrated ( it took about 6 minutes to render on my machine, so you need a bit of patience).

joonhyub

Re: Re: Ray tracing for Processing [NOW DOWNLOADABLE]

3 years ago

No I don't mind at all. Whatever suits you best, andreas. Let me have a look at what you've done to the source code and reflect the changes on my Google code page.

I want to make sure that your contribution is acknowledged - what is the best way to do it in the open-source community?

(BTW I love your works on your website, man)

joonhyub

Re: Ray tracing for Processing [NOW DOWNLOADABLE]

3 years ago

monkstone said:
Nice work andreas, I particularly like the way test sample is integrated (it took about 6 minutes to render on my machine, so you need a bit of patience).

Wow, you mean the one with a white box and a white sphere on a white plane with lights coming off at one side of the box, right? I don't understand why it takes your machine so long, because it took me about 20 seconds to render. Do you think yours being a linux box has anything to do with the slowness?

monkstone

Re: Re: Ray tracing for Processing [NOW DOWNLOADABLE]

3 years ago

Do you think yours being a linux box has anything to do with the slowness?

I don't know is the simple answer, but it might be.

However I svn checked out the sunflow project, and ran the sunflow gui with the Menger Sponge Example and that rendered somewhat quicker. I then recompiled joons.jar against my newly compiled sunflow.jar and the included janino.jar, but got errors about parse not being icluded...

joonhyub

Re: Ray tracing for Processing [UPLOADED]

3 years ago

monkstone said:

I don't know is the simple answer, but it might be

Oh I know! You can go to http://sunflow.sourceforge.net/index.php?pg=down and download the binary build of Sunflow, and use the temp.SC file and the obj files you created using my library, and render using that binary version, to find out for sure. If you are interested.

monkstone

Re: Re: Ray tracing for Processing [UPLOADED]

3 years ago

Oops comments just got crossed!!!! There seems to have been a glitch at the discussion server...

yelele_br..

Re: Ray tracing for Processing [UPLOADED]

3 years ago

It seem to be great : i'll have to learn sc file a bit but, thanks for sharing your lib

taurere

Re: Ray tracing for Processing [UPLOADED]

3 years ago

Just delivered all the functionalities and documents I promised I would.

Whatever makes Processing better for simpletons like me and rendering less of a pain.

http://code.google.com/p/joons-renderer/

monkstone

Re: Re: Ray tracing for Processing [UPLOADED]

3 years ago

Some of the file paths are still hard coded. Wherever there is '\\' in the code plays badly under linux and mac.

You could use File.separator cure this...

private char sep = java.io.File.separatorChar;

use the sep where you had \\.

Also I suggest the use of StringBuilder to build the string in openFile.

StringBuilder template = new StringBuilder("import org.sunflow.core.*;\n");
        template.append("import org.sunflow.core.accel.*;\n");
        template.append("import org.sunflow.core.camera.*;\n");
        template.append("import org.sunflow.core.primitive.*;\n");
        template.append("import org.sunflow.core.shader.*;\n");
        template.append("import org.sunflow.image.Color;\n");
        template.append("import org.sunflow.math.*;\n\n");
        template.append("public void build() {\n");
        template.append("include(");
        template.append('"');
        template.append(scFilePath);
        template.append('"');
        template.append(");}\n");
        buildTemplate = template.toString();

For whatever reason the test sample now renders reasonably quickly for me (I am now using sunflow 0.073).

Postscript 7 October 2010:-

A little tip for anyone updating to sunflow 0.073, the cornellbox is now considered a light source(formerly it was an object).

Thus in any cornell. sc file you need to replace 'object; by 'light'.

joonhyub

Re: Ray tracing for Processing [UPLOADED]

3 years ago

Thanks monkstone! I'll get it fixed.

eskimoblo..

Re: Ray tracing for Processing

3 years ago

There is a bug how the lib handle shapes other then the default POLYGON, cause it creates a new triangle after every third vertex and not after every vertex as it needs for quad strips for example. Here is a quick hack that get quad strips work (OBJWriter.java). Note not to delete the last 2 vertices in the endShape method.

public void beginShape(int kind) {

vertexCount = 0;

OBJWriteEnabled = true;

this.kind = kind;

System.out.println(kind);

// only the vertices in between beginShape() are recorded

}
public void vertex(float x, float y, float z) {
// is called when the user uses vertex() in p5.
JVector vertexVector = new JVector(x, y, z);
vertexVector = rotateAll(vertexVector);
vertexVector = translateAll(vertexVector);
vertexCount++;
if (OBJWriteEnabled) {
if (this.kind == 17) {
int mod = vertexCount %2;
if(oldVertex1!=null && oldVertex2!=null){
if(mod==0){
vertices.add(generateString("v", oldVertex1));
vertices.add(generateString("v", oldVertex2));
vertices.add(generateString("v", vertexVector));
}else{
vertices.add(generateString("v", oldVertex2));
vertices.add(generateString("v", vertexVector));
vertices.add(generateString("v", oldVertex1));
}
}
if(mod==0) {
oldVertex1 = vertexVector;
}else {
oldVertex2 = vertexVector;
}
} else {
if (vertexCount == 1) {
// the initial vertex coordinates in the beginShape()
initVertexVector = new JVector(x, y, z);
initVertexVector = rotateAll(initVertexVector);
initVertexVector = translateAll(initVertexVector);
}
vertexVector = rotateAll(vertexVector);
vertexVector = translateAll(vertexVector);
if (vertexCount == 3) {
// when there are more than 3 vertices in a beginShape(),
// we need to create another, new triangle
vertices.add(generateString("v", vertexVector));
vertices.add(generateString("v", initVertexVector));
vertexCount = 2;
}
vertices.add(generateString("v", vertexVector));
}
}
}
public void endShape(int mode) {
// remove two unnecessary remnants from the strings list
// vertices.remove(vertices.size() - 1);
// vertices.remove(vertices.size() - 1);
OBJWriteEnabled = false;
}

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

I think I know exactly what you're getting at, koeberle. This is great, cause I couldn't figure out a way to do that by myself. I'm crazy busy atm tho. Gimme a few days, I'll have it updated asap for sure! Thank you so much again :)

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

Okay, I had it a bit modified and implemented. beginShape(QUAD_STRIP), as well as plain beginShape() now work on my lib. Thanks koeberle!

jaeger83

Re: Ray tracing for Processing

3 years ago

hi there, i downloaded the library and it looks great.

unfortunately i'm getting errors when trying to run the demo sketch with the cornell_box. here is the error:

UnsupportedClassVersionError: A library is using code compiled with an unsupported version of java.

This version of Processing only supports libraries and JAR files compiled for Java 1.5.

A library used by this sketch was compiled for Java 1.6 or later, and needs to be recompiled with Java 1.5.

i am on a macbook pro running OSX 10.5.8

my java version is up to date according to Software Update

i have tried Processing versions 1.1, 1.2.1, 0191

i have sunflow version 0.07.2 installed

how can i fix this? really want to try out your library!

thanks

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

Hi jaeger83, um, I really don't know how to solve that problem.

If you know how to use Eclipse, maybe you can try compiling the lib yourself, since I've uploaded my Eclipse project folder for people to download, edit, compile and use as they wish.

Please do tell me if you wish to take this route. I'll assist you further.

Thanks!

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

Oh, hey, jaeger83, I suppose you can try updating your Java Runtime Environment to 1.6, which I reckon is the least painful solution.

jaeger83

Re: Ray tracing for Processing

3 years ago

hi joonhyub, thanks for getting back to me. i will try out your suggestions. i don't use eclipse yet but i have been recommended it.

p1r_dvndr

Re: Ray tracing for Processing

3 years ago

Joonhyub, the update is working fine. Boxes are stretched and placement via pushMatrix and popMatrix seems to work great.

Want a suggestion for the continued work? I for one would love a Sunflow library that handles the Processing camera and perspective perfectly, so I could really get the exact same placement in the render as I do in the original sketch... Let me know if I'm not making sense...

joonhyub

Re: Re: Ray tracing for Processing

3 years ago

You are referring to the fact that there is a minuscule difference between the way geometry appears in Processing and the way it appears on the rendered result, right? As far as I know, for example, 45 degrees of viewing angle in Processing is minutely different from that in Sunflow. I suppose if I can find an accurate way to calibrate Sunflow using Processing as the reference, I can make the two the same. p1r, maybe you would like to help me with this?

Thanks!

roboguyuk

Re: Ray tracing for Processing

2 years ago

Im on 10.7.1 and keep get a NullPointerException

/Code/Processing/Cos_Fun/JoonsWIP/CameraExport.txt does not exist or could not be read

/Code/Processing/Cos_Fun/JoonsWIP/PerspectiveExport.txt does not exist or could not be read

/Code/Processing/Cos_Fun/JoonsWIP/FileMeshExport.txt does not exist or could not be read

/Code/Processing/Cos_Fun/JoonsWIP/SphereExport.txt does not exist or could not be read

Exception in thread "Animation Thread" java.lang.NullPointerException

at joons.SCModifier.importPerspective(SCModifier.java:111)

at joons.JoonsRenderer.setSC(JoonsRenderer.java:73)

at Cos_Fun.setup(Cos_Fun.java:37)

at processing.core.PApplet.handleDraw(Unknown Source)

at processing.core.PApplet.run(Unknown Source)

at java.lang.Thread.run(Thread.java:680)

I've checked the permissions on my sketchbook and that path is definatley correct.

joonhyub

Re: Ray tracing for Processing

4 months ago

FYI, I've updated my library to be compatible with Processing 2.0b9. Thanks.

danyje

Re: Ray tracing for Processing

4 months ago

Very curious library for experiments, thank you! :)

joonhyub

Re: Ray tracing for Processing (Joons-Renderer)

4 months ago

Original Processing sketch with cornell box.

Rendered using Joons-Renderer v0.98b.

Hey, guys.

I've been totally rewriting my Joons-Renderer library for the past month. It's near completion, and I think I should do a beta test before I release it. If anyone’s interested, let me know your email, or email me, joonhyub.lee@kaist.ac.kr, and I will send you a copy of the library. I just want to get some feedback.

I tried to make it as natural to Processing as possible, compared to the last version. So setting a texture with the library is now as easy as:

fill(“shiny”, R, G, B);

sphere(15);

For more info on the project itself, you can visit here (2010), but I intend to update the website only when this beta test is completed.

Thanks!

monkstone

Re: Re: Ray tracing for Processing (Joons-Renderer)

3 months ago

I just gave version 0.99 a test drive looks pretty good to me. We are now back to processing coordinate system.

import joons.JoonsRenderer;
JoonsRenderer jr;
//camera declarations
float eyeX = 0;
float eyeY = 0;
float eyeZ = 120;
float centerX = 0;
float centerY = 0;
float centerZ = -1;
float upX = 0;
float upY = 1;
float upZ = 0;
float fov = PI / 4;
float aspect = 4/3f;
float zNear = 5;
float zFar = 10000;
void setup() {
size(800, 600, P3D);
jr = new JoonsRenderer(this);
}
void draw() {
jr.beginRecord(); //Make sure to include methods you want rendered.
camera(eyeX, eyeY, eyeZ, centerX, centerY, centerZ, upX, upY, upZ);
perspective(fov, aspect, zNear, zFar);
jr.cornellBox(100, 100, 100); //cornellBox(width, height, depth);
jr.background("gi_instant"); //Global illumination.
jr.fill("diffuse", 255, 0, 0);
render();
jr.endRecord();
jr.displayRendered(true); //Display rendered image if rendering completed, and the argument is true.
}
void render() { // encapsulate the processing sketch as a function
translate(0, 40, -10);
rotateY(-PI/8);
fill(255, 0, 0);
box(15);
translate(0, -15, 0);
box(15);
translate(15, 0, 0);
box(15);
translate(-15, -15, 0);
box(15);
translate(0, -15, 0);
box(15);
translate(15, 0, 0);
box(15);
}
void keyPressed() {
if (key=='r' || key=='R') jr.render(); //Press 'r' key to start rendering.
}

Chrisir

Re: Ray tracing for Processing (Joons-Renderer)

3 months ago

Hello,

Thanks!

I didn't have time to test it.

It looks great.

How fast does it work? Is it only suitable for producing images or can I use it for games with slowly moving tiles like chess pieces?

Thanks!

Greetings, Chrisir

joonhyub

Re: Re: Ray tracing for Processing (Joons-Renderer)

3 months ago

Hi Chrisir,

It takes at least 3 ~ 4 seconds to render an image,

so i'd say its unsuitable for interactive purposes, e.g. games.

One way to do this may be to pre-render everything your game will ever need to display beforehand,

but I'm guessing that can be pretty difficult with chess.

Anyway, its available now at the website (still under development):

http://github.com/joonhyublee/joons-renderer/wiki

so I'd appreciate it if you'd try it and tell me what you think when you get the time.

Cheers!

Top Reply

DownloadYou can download it from http://code.google.com/p/joons-renderer/ with a bunch of examples and instructions.

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Download
You can download it from http://code.google.com/p/joons-renderer/ with a bunch of examples and instructions.