RayTracing Tutorial Full (Simple)

Benproductions1 · April 19, 2013, 8:44am

Hi! there,

After reading through this (quite a while ago):
http://forum.unity3d.com/threads/14980-Raytracing-tutorial-part-1

And, having created my own Raytracer in Unity:
https://github.com/Benproductions1/Unity-Raytracer

I decided I just wanted to make my own Tutorial on how to create a Raytraced renderer in Unity.
It’s quite simple and quite short, but I hope you enjoy it non the less:

github.com

BenjaminSchaaf/Unity-Raytracer/blob/master/Tutorial (Simple).md

Building a RayTracer in Unity
=============================
##Intro
Hello, and again, welcome to the "Building a RayTracer in Unity" tutorial.
Here are a couple things you should probably know:

- Everything will be statically typed... even function
- I will post the full script after every chapter
- This is made in Unity 4 indie. I have no guarantees it will work anywhere else
- If at any time during this tutorial you get lost on something, please take the time to look it up, before you ask me
- If you do not feel comfortable doing some basic programing, please learn before you come here :)

Note that throughout this tutorial I am assuming that you are already aware of the basics behind raytracing.I also assume you have basic knowledge in programming in Unityscript.  
Note that I will not teach you scripting, nor will I answer any questions related to basic scripting problems, as there are enough tutorials out there that already do that. I am solely focusing on Raytracing in Unity.

##Part 1: Black and White
The very first thing we should get working, is just getting unity to render something on the screen. For the time being, we are not going to worry what we are rendering, but more on how we are going to render it.

Lets begin with the start of the script: Defining the variables.  
The Only variable we need as of yet is the texture we want to render too

This file has been truncated. show original

Hope you enjoy it!
Benproductions1

Luckymouse · April 29, 2013, 8:38pm

Thanks for the Tutorial. I had try but after I attached the RTRenderer.js to the camera, then click play, then unity editor just freezed up.
I’m using 4.1.2f1 pro on my macbook. am I missing something?

Do you have any webplayer demo?

Benproductions1 · April 29, 2013, 11:01pm

@Luckymouse
I can only help you if you give me some more information. What part of the tutorial are you at? Does your code match that at the end of each chapter?
Does Unity freeze and die, or does it just take a really long time to render (if so just lower the resolution and/or make the game tab smaller)

I do not have a webplayer, but since all it is is just some code, I find no need for it.

Hope this helps,
Benproductions1

imaginaryhuman_1 · April 29, 2013, 11:07pm

Does it run in a shader or is it all scripting?

Benproductions1 · April 29, 2013, 11:17pm

@imaginaryhuman
It’s all scripting, the idea is to make it easy to understand for people who aren’t exactly the best at scripting,
so doing it in shaders would just confuse the majority of people anyway

If you want to take a look at the more advanced ray-tracer I made, it’s in the same repository.

Feel free to take what you want
Benproductions1

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RayTracing Tutorial Full (Simple)

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