This is a set of C++ classes for solving and displaying real-time fluid dynamics simulations based on Navier-Stokes equations and Jos Stam's paper on Real-Time Fluid Dynamics for Games. The solver class has no dependencies on openFrameworks and can be used in any C++ project. The drawer class extends ofBaseDraws and contains an ofTexture for seamless integration with openFrameworks drawing routines. Also included in the addon is a ofxMSAParticleUpdater class which allows the fluid solver to be easily plugged into ofxMSAPhysics as a force field.

About

This is a library for solving real-time fluid dynamics simulations based on Navier-Stokes equations and Jos Stam's paper on Real-Time Fluid Dynamics for Games. While I wrote the library primarily for processing it has no dependency on processing libraries and the source can be used with any Java application.

C++ version for openFrameworks can be found here.

The video below is a demo of a processing sketch using MSAFluid, being controlled by MSA Remote on iPhone (You can view the video in HD and download a 1080p version at vimeo).

Superfluid vs Particle from jimi hertz on Vimeo.

MSA Fluids test from den ivanov on Vimeo.

MSAFluid on a MultiTouch table from xTUIO from Sandor Rozsa on Vimeo.

Note: Everytime I mention iPhone, I am in fact referring to iPhone & iPod Touch running OS 2+.

Update 29/03/2009

Just posted a simple example application source code and walk-through which can be found here.

Update 27/03/2009

openFrameworks 006 is now officially released! You can download a fat package for your system from www.openframeworks.cc, mac/linux/windows and now iPhone. I do recommend you keep an eye on the ofxiPhone SVN for updates and fixes.

What is this and what does it do?

ofxiPhone (along with ofxMultitouch & ofxAccelerometer) are addons for openFrameworks 006+ that allow you to develop for iPhone in plain old C/C++ just as you would on a normal desktop (mac, linux, windows). This means using the normal testApp.h, testApp.cpp, main.cpp; setup(), update(), draw(), mousePressed(), ofImage, ofTexture etc. and any other C++ classes you may have created. It also means that you can reuse your exact same code running on your desktop (mac osx, windows, linux) unchanged on the iPhone by just copying across your testApp.h, testApp.cpp, main.cpp and other source or resource files you may be using.

ofxMSAPhysics is a C++ 3D particle/constraint based physics library for openFrameworks. It uses a very similar api to the traer.physics library for processing to make getting into it as easy as possible.

Version 2.0a is now available for testing.

Main features include

• particles
• springs
• attractions (+ve or -ve)
• collision
• replay saving and load from disk (temporarily disabled in current alpha release)
• custom particles (extend ofxMSAParticle and add to the system)
• custom constraints (extend ofxMSAConstraint and add to the system)
• custom force fields (extend ofxMSAParticleUpdater and add to the system) 
• custom drawing (extend ofxMSAParticleDrawer and add to the system)

Made with openFrameworks.

Over the years OpenGL has developed lots of different ways of sending vertex data to the graphics card: Immediate mode (glBegin / glVertex / glEnd etc.), Display Lists, Vertex Arrays, Vertex Buffer Objects etc. The first of these (Immediate Mode) is quite inefficient, so it's been dropped in OpenGL ES and depreciated in OpenGL 3.0. Instead we are to use Vertex Arrays or VBO's (Vertex Buffer Objects). They are way more efficient, but generally not as straightforward to setup and use.

For this reason I wrote a C++ class that wraps up the functionality of Vertex Arrays (and soon VBO's) in an immediate mode style syntax. I.e. you can carry on calling glBegin / glNormal / setColor / glTexCoord / glVertex / glEnd etc. but instead of sending the data on every function call, it just caches them all in client-side arrays, and sends it all in one go when you call glEnd(). Later you can call draw() to redraw the information you've put in. Thus improving performance on desktop systems, and allowing immediate mode style syntax on embedded systems such as the iPhone. (The previous post about the Meshulator uses this class).

A set of C++ template classes for doing various types of interpolations on data with any number of dimensions. You can feed the system an arbitrary number of data (data can be simple types like float, int or complex types like structs, classes), then resample at any resolution, or ask for the value at any percentage along the data - or just draw it - including splines in 3D.
This is useful for creating and drawing splines (in any dimensions), or creating smooth animation paths from keyframes (again, in any dimensions).

Made with openFrameworks.

Source code on SVN here