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96 lines
2.5 KiB
C++
96 lines
2.5 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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* 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 "titanic/star_control/flight_manager_base.h"
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#include "titanic/star_control/fmatrix.h"
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namespace Titanic {
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CFlightManagerBase::CFlightManagerBase() : _srcPos(0.0, 1000000.0, 0.0) {
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_active = false;
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_distance = 0.0;
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_flight = false;
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_step = 0.0;
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_step1 = 0;
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_accCount = 0;
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_traCount = 0;
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_decCount = 0;
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_totCount = 0;
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_currentSpin = 0.0;
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_spinStep = 0.0;
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}
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void CFlightManagerBase::clear() {
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_srcPos.clear();
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_destPos.clear();
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_currentSpin = 1.0;
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_distance = 0.0;
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_active = false;
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_flight = false;
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}
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void CFlightManagerBase::setPath(const FVector &from, const FVector &to) {
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_srcPos = from;
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_destPos = to;
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_direction = _destPos - _srcPos;
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// normalization won't happen if _direction is zero vector and that is okay
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float temp = 0.0;
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_direction.normalize(temp);
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_distance = temp;
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_active = false;
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_flight = false;
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_accCount = -1;
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_traCount = -1;
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_decCount = -1;
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_totCount = -1;
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_currentSpin = 1.0;
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}
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void CFlightManagerBase::buildMotionTable(int sustain, int decay, float distance) {
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_step = distance / (sustain + 2 * decay);
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_step1 = decay * _step;
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_accCount = GAMMA_TABLE_SIZE - 1;
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_traCount = sustain;
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_decCount = GAMMA_TABLE_SIZE - 1;
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_totCount = _accCount + _traCount + _decCount;
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// Main calculation loop
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double radix = 4.0;
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double index = 0.0;
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double step = 1.0 / (double)(GAMMA_TABLE_SIZE);
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double total = 0.0;
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for (int i = 0; i < GAMMA_TABLE_SIZE; ++i) {
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_gammaTable[GAMMA_TABLE_SIZE - i - 1] = pow(index, radix);
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index += step;
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total += _gammaTable[GAMMA_TABLE_SIZE - i - 1];
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}
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// normalise them
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for (int i = 0; i < GAMMA_TABLE_SIZE; ++i)
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_gammaTable[i] = _step1 * _gammaTable[i] / total;
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}
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} // End of namespace Titanic
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