Creating springs

In this recipe, we will learn how we can create springs.

Springs are objects that connect two particles and force them to be at a defined rest distance.

In this example, we will create random particles, and whenever the user presses a mouse button, two random particles will be connected by a new spring with a random rest distance.

Getting ready

We will be using the same particle system developed in the previous recipe, Creating a particle system in 2D. Create the Particle and ParticleSystem classes described in that recipe and include the ParticleSystem.h file at the top of the application source file.

We will be creating a Spring class, so it is necessary to create the following files:

• Spring.h

• Spring.cpp

How to do it…

We will create springs that constrain the movement of particles. Perform the following steps to do so:

1. In the Spring.h file, we will declare a Spring class. The first thing we need to do is to add the #pragma once macro and include the necessary files.

   #pragma once...