BASIC compiler for Windows with OpenGL support
Created by Tom Mulgrew (tmulgrew@slingshot.co.nz)

Current released version

Basic4GL v2.5.5 (Installer, 5.0MB)

Download other versions, source code and plugins from the downloads page.

Basic4GL is a free BASIC programming language for Win32 platforms with built in OpenGL v1.1 support.
Basic4GL is a compiler and virtual machine, using a easy, simple syntax based on traditional BASIC. It is designed to be an easy to learn, easy to use language for writing games, 3D demos and utilities without all the setup hassle associated with most language compilers.

Basic4GL was written for anyone who:

• Wants a free, easy to learn language to get into programming
• Wants to learn OpenGL, or wants an easy to use environment for playing around with OpenGL, testing out ideas, making concept prototypes, e.t.c
• Wants to write 3D games and demos.

Write 3D OpenGL programs

Basic4GL is built around the OpenGL 3D accellerated graphics library. It automatically handles such tasks as creating an OpenGL window and initialising OpenGL for you, so you can skip all the usual linking, header file and initialisation and start writing OpenGL code from line 1.
For example, here's a complete, working OpenGL program in Basic4GL

glBegin (GL_TRIANGLES)
   glVertex3f (0, 10, -30)
   glVertex3f (8, -4, -30)
   glVertex3f (-8, -4, -30)
glEnd ()
SwapBuffers()

Basic4GL comes with a number of Nehe tutorial programs (converted to Basic4GL format).

Vectors and matrices are integrated directly into the Basic4GL language as 1D and 2D arrays respectively. Mathematical operators such as multiplication (*) and addition (+) behave appropriately on vector and matrix types, so you can write vector and matrix notation algebra directly into your programs.

You also get a standard library of trig functions and matrix creation routines (designed to mirror OpenGL's matrix creation routines), which makes trigonometry calculations quick, easy and compact to implement.

Write 2D programs

If you don't feel like writing OpenGL code or you just want to write some 2D sprite based games you can try Basic4GL's 2D sprite and tile engine. Use it to create 2D side scrollers, shoot-em-'ups, and animations without writing a line of OpenGL code.

Create your own games and demos

Once you've written your masterpiece, a few clicks will turn it into a stand-alone Windows executable file which you can distribute to whomever you want.

Program, test and debug from the same environment

The Basic4GL programming language is designed to be simple, flexible and very hard to crash! Run-time errors (such as array index out of bounds) are caught cleanly, and all resources (such as textures or file handles) are automatically cleaned up for you when the program finishes.
All editing takes place within the Basic4GL built in IDE, consisting of a syntax highlighting editor and a full symbolic debugger.
Basic4GL compiles and runs your changes in an instant, so you can tweak and experiment until you're completely satisfied (without having to reboot each time ;) without ever having to leave the Basic4GL programming environment.

Basic4GL isn't my day job! :-)
It's an application written in my own time because I felt like it.

As such it's not designed to compete with Blitz Basic, Dark Basic, Pure Basic, DiNGS Game Basic or any other commercial product. It doesn't compile to native machine code (if it did I'd be charging $$$ for it!), and Basic4GL is definitely not going to be the next C++!

Basic4GL was intended as a replacement for the old, free, beginner friendly, BASIC languages like QBasic/GWBasic that made programming accessible and easy to get into, but upgraded with some modern features to keep it relevant, up-to-date and interesting.

Basic4GL has come a long way, and a huge part of this is due to the support, suggestions, criticisms, code and tutorials contributed by users. To everybody who has helped out, thank you.

There are a number of ways you can help make Basic4GL a better program for everyone:

• The easiest is to just make a suggestion. E.g. "Basic4GL would be so much better if it had...".
  The discussion forum is a good place for this.
• Help out with the Basic4GL Wiki.
  We're currently working on moving the documentation and tutorial content of Basic4GL to Wiki format, so that anybody can help maintain the articles, extend them or add entirely new content.
• Write up a demo/game/example for Basic4GL.
  Basic4GL always needs some more new content to demonstrate what can be done and how.If it's something small, you can post it up in the discussion forum.
  If it's something big, or contains custom graphics or other files, you can email it to me and I will add it to the demos and examples section.
  With your permission I may even add it to the Basic4GL general release.
• Write up a tutorial. 3D, sprites, general programming, or whatever you feel would be useful to others.
  The Basic4GL Wiki is a good place to do this.
• Make a PayPal donation.
  Just a small amount of generousity makes me feel warm, fuzzy and appreciated.
  Also keeps the website hosts from pulling the plug :)