Function HandleCrashedTrain

src/train_cmd.cpp:3742–3778

* Handle a crashed train. * @param v First train vehicle. * @return %Vehicle chain still exists. */

 * @return %Vehicle chain still exists.
 */
static bool HandleCrashedTrain(Train *v)
{
	int state = ++v->crash_anim_pos;

	if (state == 4 && !v->vehstatus.Test(VehState::Hidden)) {
		CreateEffectVehicleRel(v, 4, 4, 8, EV_EXPLOSION_LARGE);
	}

	uint32_t r;
	if (state <= 200 && Chance16R(1, 7, r)) {
		int index = (r * 10 >> 16);

		Vehicle *u = v;
		do {
			if (--index < 0) {
				r = Random();

				CreateEffectVehicleRel(u,
					GB(r,  8, 3) + 2,
					GB(r, 16, 3) + 2,
					GB(r,  0, 3) + 5,
					EV_EXPLOSION_SMALL);
				break;
			}
		} while ((u = u->Next()) != nullptr);
	}

	if (state <= 240 && !(v->tick_counter & 3)) ChangeTrainDirRandomly(v);

	if (state >= 4440 && !(v->tick_counter & 0x1F)) {
		bool ret = v->Next() != nullptr;
		DeleteLastWagon(v);
		return ret;
	}

	return true;
}

/** Maximum speeds for train that is broken down or approaching line end */
static const uint16_t _breakdown_speeds[16] = {