Method RailTrail

client/src/main/java/jake2/client/CL_fx.java:1543–1620

(float[] start, float[] end)

	 * ===============
	 */
	static void RailTrail(float[] start, float[] end) {
		float len;
		int j;
		cparticle_t p;
		float dec;
		float[] right = new float[3];
		float[] up = new float[3];
		int i;
		float d, c, s;
		float[] dir = new float[3];
		byte clr = 0x74;

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

		Math3D.MakeNormalVectors(vec, right, up);

		for (i = 0; i < len; i++) {
			if (free_particles == null)
				return;

			p = free_particles;
			free_particles = p.next;
			p.next = active_particles;
			active_particles = p;

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

			d = i * 0.1f;
			c = (float) Math.cos(d);
			s = (float) Math.sin(d);

			Math3D.VectorScale(right, c, dir);
			Math3D.VectorMA(dir, s, up, dir);

			p.alpha = 1.0f;
			p.alphavel = -1.0f / (1.0f + Globals.rnd.nextFloat() * 0.2f);
			p.color = clr + (Lib.rand() & 7);
			for (j = 0; j < 3; j++) {
				p.org[j] = move[j] + dir[j] * 3;
				p.vel[j] = dir[j] * 6;
			}

			Math3D.VectorAdd(move, vec, move);
		}

		dec = 0.75f;
		Math3D.VectorScale(vec, dec, vec);
		Math3D.VectorCopy(start, move);

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

			if (free_particles == null)
				return;
			p = free_particles;