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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "engines/stark/movement/stringpullingpath.h"
#include "engines/stark/resources/floor.h"
#include "engines/stark/services/global.h"
#include "engines/stark/services/services.h"
#include "math/line3d.h"
namespace Stark {
StringPullingPath::StringPullingPath() :
_targetStep(1) {
}
void StringPullingPath::addStep(const Math::Vector3d &position) {
_steps.push_back(position);
}
void StringPullingPath::reset() {
_steps.clear();
_targetStep = 1;
}
Math::Vector3d StringPullingPath::computeWalkTarget(const Math::Vector3d &fromPosition) {
Current *current = StarkGlobal->getCurrent();
Resources::Floor *floor = current->getFloor();
// HACK: Sometimes the character gets stuck because of rounding errors
// If we detect the character is stuck on a step, just make it go to the next one.
// TODO: Improve the string pulling code so that the targets can also be points between two steps.
if (fromPosition.getDistanceTo(_steps[_targetStep]) < 1.0 && _targetStep < _steps.size() - 1) {
_targetStep++;
}
for (uint i = _targetStep + 1; i < _steps.size(); i++) {
Math::Line3d testSegment = Math::Line3d(fromPosition, _steps[i]);
if (!floor->isSegmentInside(testSegment)) {
break;
}
_targetStep = i;
}
return _steps[_targetStep];
}
bool StringPullingPath::hasSteps() const {
return _steps.size() > 1;
}
} // End of namespace Stark
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