Method RocketTrail

client/src/main/java/jake2/client/CL_fx.java:1491–1534

(float[] start, float[] end, centity_t old)

	 * ===============
	 */
	static void RocketTrail(float[] start, float[] end, centity_t old) {
		float len;
		int j;
		cparticle_t p;
		float dec;

		// smoke
		DiminishingTrail(start, end, old, Defines.EF_ROCKET);

		// fire
		Math3D.VectorCopy(start, move);
		Math3D.VectorSubtract(end, start, vec);
		len = Math3D.VectorNormalize(vec);

		dec = 1;
		Math3D.VectorScale(vec, dec, vec);

		while (len > 0) {
			len -= dec;

			if (free_particles == null)
				return;

			if ((Lib.rand() & 7) == 0) {
				p = free_particles;
				free_particles = p.next;
				p.next = active_particles;
				active_particles = p;

				Math3D.VectorClear(p.accel);
				p.time = ClientGlobals.cl.time;

				p.alpha = 1.0f;
				p.alphavel = -1.0f / (1.0f + Globals.rnd.nextFloat() * 0.2f);
				p.color = 0xdc + (Lib.rand() & 3);
				for (j = 0; j < 3; j++) {
                    p.org[j] = move[j] + Lib.crandom() * 5;
                    p.vel[j] = Lib.crandom() * 20;
				}
				p.accel[2] = -PARTICLE_GRAVITY;
			}
			Math3D.VectorAdd(move, vec, move);
		}
	}

	// stack variable
	// move, vec