104 lines
2.9 KiB
C++
104 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "pegasus/movie.h"
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#include "pegasus/pegasus.h"
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#include "pegasus/neighborhood/mars/constants.h"
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#include "pegasus/neighborhood/mars/hermite.h"
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#include "pegasus/neighborhood/mars/planetmover.h"
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#include "pegasus/neighborhood/mars/shuttleenergymeter.h"
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namespace Pegasus {
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static const TimeScale kRovingScale = kTractorBeamScale;
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static const TimeValue kRovingTime = kTenSeconds * kRovingScale;
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static const TimeValue kRovingSlop = kTwoSeconds * kRovingScale;
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static const CoordType kMaxVelocity = 20;
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PlanetMover::PlanetMover() {
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setScale(kRovingScale);
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_dropping = false;
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_planetMovie = nullptr;
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}
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void PlanetMover::startMoving(Movie *planetMovie) {
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_planetMovie = planetMovie;
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_p4 = kPlanetStartTop;
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_r4 = g_vm->getRandomNumber(kMaxVelocity - 1);
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if (_r4 + _p4 < kPlanetStopTop)
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_r4 = kPlanetStopTop - _p4;
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newDestination();
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}
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void PlanetMover::stopMoving() {
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stop();
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}
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void PlanetMover::dropPlanetOutOfSight() {
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stop();
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CoordType currentLoc = hermite(_p1, _p4, _r1, _r4, _lastTime, _duration);
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CoordType currentV = dHermite(_p1, _p4, _r1, _r4, _lastTime, _duration);
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_p1 = currentLoc;
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_r1 = currentV;
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_p4 = kPlanetStartTop;
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_r4 = 0;
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_duration = kTractorBeamTime - kTractorBeamScale;
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_dropping = true;
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setSegment(0, _duration);
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setTime(0);
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start();
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}
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void PlanetMover::newDestination() {
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_p1 = _p4;
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_r1 = _r4;
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_p4 = kPlanetStopTop + g_vm->getRandomNumber(kPlanetStartTop - kPlanetStopTop - 1);
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_r4 = g_vm->getRandomNumber(kMaxVelocity - 1);
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if (_r4 + _p4 < kPlanetStopTop)
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_r4 = kPlanetStopTop - _p4;
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stop();
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_duration = kRovingTime + g_vm->getRandomNumber(kRovingSlop - 1);
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setSegment(0, _duration);
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setTime(0);
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start();
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}
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void PlanetMover::timeChanged(const TimeValue) {
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if (_planetMovie) {
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_planetMovie->moveElementTo(kPlanetStartLeft, hermite(_p1, _p4, _r1, _r4, _lastTime, _duration));
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if (_lastTime == _duration) {
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if (_dropping)
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stop();
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else
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newDestination();
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}
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}
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}
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} // End of namespace Pegasus
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