This is a simple wrapper for Box2d using Openframeworks. The examples below are still in progress, but should be stable for the most part. Please open up a issue if you have suggestions or find bugs. The wrapper is using Box2d version 2.3.
First, pick the branch that matches your version of openFrameworks:
When making a vector of objects you need to be careful. You either need to make a vector of pointers or use the
Everytime you push into the vector
circles the object is destroyed and the created.
This causing issues for the
b2dBody body object owned by Box2d.
Incorrect way to store objects.
vector <ofxBox2dCircle> circles; ofxBox2dCircle circle; circles.push_back(circle);
Here is the how to create a vector of Box2d objects.
// in your header files vector <shared_ptr<ofxBox2dCircle> > circles; // now add a circle to the vector auto circle = std::make_shared<ofxBox2dCircle>(); // to grab the pointer you use the get() function of shared_ptr (std::shared_ptr) circle.get()->setPhysics(3.0, 0.53, 0.1); circle.get()->setup(box2d.getWorld(), 100, 100, 10); circles.push_back(circle);
Place ofxBox2d within a folder in the apps folder of the OF dir tree:
master branch is compatible with the current release of openFrameworks, and the
develop branch tries to stay up to date with openFrameworks on GitHub.