Tao3D Libre Edition – Tao is now Open Source

Taodyne just released Tao3D “Libre Edition”, a GPLv3 version of Tao3D.

What is Tao3D?

Tao3D is a functional reactive programming language designed specifically for real-time 3D animations. It lets you create sophisticated, data-rich presentations very quickly. It used to be called “Tao Presentations”, but as we open the source code, we think it’s about time we change the name as well. Tao3D stands for “The Art of 3D“.

Yeah, but why should I care?

Tao3D is a fun development environment, ideal to teach programming to kids, because you immediately see what you do, graphically. It is also a great tool to present complex information. If you have a billion data points to explore interactively, it can do that. If you want to show a 3D model of a new car, it can do that too. And if all you need is to see what a given text does in 32 different typefaces, nothing is easier than to do it with Tao.

If you are a graphics programmer, it’s probably one of the best environments out here to test shaders interactively, in relatively realistic environments. You can also use it to quickly prototype new user interface ideas, typically with one tenth the amount of code it would take with JavaScript/HTML or some old technology like that.

Oh, and it’s free, and the code source is available. So can’t find a better bargain…

Is the source code any interesting for developers?

Tao3D is implemented using a few ideas that might spark some interest notably for people who work on compilers.

1. A homo-iconic source code format that remains readable.

Homoiconic languages like Lisp (i.e. languages where code and data are “the same thing”) are often relatively hard to read for humans. Tao3D uses a parse tree format that is very simple yet can represent practically any source code in a relatively natural way.

Specifically, there are 8 node types: integer, real, text, name, infix, prefix, postfix and block. The first four are terminals as well as leafs in the parse tree. The last four are inner nodes, and represent the way humans perceive a specific operation. “Infix” represents “A+B” or “A and B”. “Prefix” represent “+3” or “sin x”. “Postfix” represent “3%” or “3km”. Finally, “Block” represent (A) or [A] or {A}. Blocks are used to represent indentation. Infix are used to represent line separators.

Like in Lisp, the parse tree is also the fundamental data structure at runtime. The type system as described in the reference document is not fully implemented yet, but once it is, it will be a thing of beauty🙂

2. A compilation strategy based on tree rewrites

A single operator, ->, which reads as “transforms into”, is used to define functions, operators, variables and macros / syntactic structures.

// X transforms into 0: Defines X as a variable
X->0

// Define a factorial function
0! -> 1
N! -> N * (N-1)!

// Define an 'if-then-else'
if true then X else Y -> X
if false then X else Y -> Y

3. A reactive approach for dynamic events

Tao3D is reactive, meaning that the program automatically reacts to events and updates accordingly. For example, you can have a circle that follows the mouse with the following program:

color "red"
circle mouse_x, mouse_y, 100

This automatically create a mouse-based animation. More examples are given in the article linked at the beginning of this post.

4. A real-time code generation using LLVM

Tao3D uses LLVM to dynamically generate code on the fly as you change its source code. This is not new per se, but if you are interested in this kind of things, this is an example of code that can teach you how to do it.

Build instructions

git clone https://github.com/c3d/tao-3D.git
cd tao-3D
git submodule update --init --recursive
./configure
make install

Fork me on GitHub, and enjoy.

Reminder: What does it do?

As a reminder, here is the video I already posted yesterday that shows what Tao can do for you.

7 thoughts on “Tao3D Libre Edition – Tao is now Open Source

  1. Hello, searching for information on this language come here.
    The point is that in the official site there is detailed information about the language and its installation in ubuntu which is my operating system. I would be grateful if you could provide me with basic and advanced information to start programming in this language.
    Thank you

    1. Hello peron,

      There are three ways to get started:
      – You can find a number of examples on http://tao3d.sf.net.
      – Many of these examples are available in the Help menu of Tao3D
      – There are a number of examples and tutorials on the Taodyne blog, e.g. http://www.taodyne.com/shop/blog/294-from-javascript-to-tao3d-33-times-shorter. Unfortunately, some information was lost in the transition from one version of our blog to the next, and so it’s no longer that easy to find the tutorials😦

      Feel free to ask questions directly too.

      1. sorry, The error messages after make install are:

        make[1]: *** [compiler.o] Error 1
        make[1]: se sale del directorio «/home/nada/tao-3D/libxlr»
        make: *** [sub-libxlr-install_subtargets] Error 2

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