In this section, we add to the project the emitter, which will create particles at a specified rate.
The example is based on the 03-Particles/01-SingleParticle project, implemented in the previous section. We implement the emitter right inside the testApp class. In the class declaration, replace the following line with declaration of a single particle Particle p; with an array of particles:
vector<Particle> p; //Particles
Note
We will delete inactive particles from any parts of the p array. So for computational efficiency, it is preferable to use the deque class instead of vector. But for simplicity, in this example, we use vector. It works fast enough for our purposes in the example.
See usage of deque in the Radial slit-scan example section in Chapter 5, Working with Videos.
Next, add the declaration of the parameter bornRate and the supplementary variable bornCount:
float bornRate; //Particles born rate per...