95     mtx_t     particles_lock; // Particles data sharing mutex
150 // Maximum number of particles
194 // Global vectors holding all particles. We use two vectors for double
196 static PARTICLE particles[MAX_PARTICLES];  variable
227     printf("Usage: particles [-bfhs]\n");  in usage()
320         // Particles should bounce on the fountain (with friction)  in update_particle()
330         // Particles should bounce on the floor (with friction)  in update_particle()
350     // Update particles (iterated several times per frame if dt is too large)  in particle_engine()
357             update_particle(&particles[i], dt2);  in particle_engine()
369                 if (!particles[i].active)  in particle_engine()
371                     init_particle(&particles[i], t + min_age);  in particle_engine()
372                     update_particle(&particles[i], min_age);  in particle_engine()
384 // Draw all active particles. We use OpenGL 1.1 vertex
388 #define BATCH_PARTICLES 70  // Number of particles to draw in each batch
411     // Note that 1) and 2) is the same for all particles (done only once).  in draw_particles()
432     // Don't update z-buffer, since all particles are transparent!  in draw_particles()
471     // Loop through all particles and build vertex arrays.  in draw_particles()
474     pptr = particles;  in draw_particles()
533             // Increase count of drawable particles  in draw_particles()
537         // If we have filled up one batch of particles, draw it as a set  in draw_particles()
557     // Draw final batch of particles (if any)  in draw_particles()
849     // Particles must be drawn after all solid objects have been drawn  in draw_scene()
918         // Update particles  in physics_thread_main()