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//
// C++ Implementation: BoatAnimation
//
// Description:
//
//
// Author: Thibaut GRIDEL <tgridel@free.fr>
//
// Copyright (c) 2008-2010 Thibaut GRIDEL
//
// 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 <iostream>
#include <cmath>
#include <QtGui>
#include "boatanimation.h"
#include "headinganimation.h"
#include "situationmodel.h"
#include "splineanimation.h"
#include "trackmodel.h"
#include "boatmodel.h"
#include "boat.h"
/**
Populates the internal lists of Positions and Headings function
of time
This method parses the path of the \a track, does some stalling
analysis and determines position and heading as a function of time.
It also gives the pale color to \a track boats, while keeping
original color for animation \a boat.
*/
BoatAnimation::BoatAnimation(TrackModel *track, BoatGraphicsItem *boat, int maxSize, QObject *parent)
: QParallelAnimationGroup(parent),
m_track(track),
m_boat(boat),
m_headingAnimation(new HeadingAnimation(boat->boat(), "heading")),
m_sailAngleAnimation(new HeadingAnimation(boat->boat(), "trimSailAngle")),
m_posAnimation(new QSequentialAnimationGroup),
m_maxSize(maxSize),
m_time(QTime::currentTime()) {
QPainterPath path = m_track->path();
int size = m_track->size() - 1;
if (size < 0) {
return;
}
m_boat->setOrder(0);
QPointF point = path.elementAt(0);
// setPosAt(0,point);
BoatModel *model = m_track->boats()[0];
m_headingAnimation->setDuration(2000*m_maxSize);
m_headingAnimation->setStartValue(model->heading());
m_sailAngleAnimation->setDuration(2000*m_maxSize);
m_sailAngleAnimation->setStartValue(model->trimmedSailAngle());
// through all boats of the track
for (int i=0; i< size; i++) {
qreal index = 0;
QPointF c1 = path.elementAt(i*3+1);
QPointF c2 = path.elementAt(i*3+2);
QPointF end = path.elementAt(i*3+3);
bool stalled = ((point == c1) || (c2 == end));
QPainterPath curve(point);
curve.cubicTo(c1,c2,end);
qreal length = curve.length();
float e = 8;
// through 8 intermediary points between 2 boats
for (int j=1; j<=e; j++) {
qreal percent = curve.percentAtLength(length*j/e);
index = (i*e+j)/(maxSize*e);
if (!stalled) {
m_headingAnimation->setKeyValueAt(index, fmod(360+90-curve.angleAtPercent(percent),360.0));
}
}
model = m_track->boats()[i+1];
if (stalled) {
m_headingAnimation->setKeyValueAt(index, model->heading());
}
m_sailAngleAnimation->setKeyValueAt(index, model->trimmedSailAngle());
SplineAnimation *splineAnimation = new SplineAnimation(m_boat->boat(), "pos", m_track->boats()[i]->path());
splineAnimation->setStartValue(point);
splineAnimation->setEndValue(end);
splineAnimation->setDuration(2000);
m_posAnimation->addAnimation(splineAnimation);
point = end;
}
// dim all track boats
foreach(BoatModel *boat, m_track->boats()) {
boat->setDim(true);
}
}
/**
Resets the color and List of BoatModels in the track
*/
BoatAnimation::~BoatAnimation() {
while (!m_boats.isEmpty()) {
m_track->addBoat(m_boats.last());
m_boats.pop_back();
}
// undim all track boats
foreach(BoatModel *boat, m_track->boats()) {
boat->setDim(false);
}
}
/**
Updates TrackModel and animation boat position and heading
at \a step time, with a rate limit of one refresh every 40ms
*/
void BoatAnimation::afterAnimationStep(qreal step) {
// limit update rate to 40ms
if ((m_time.elapsed() < 40) && (step != 0) && (step != 1)) {
return;
}
m_headingAnimation->setCurrentTime(step*2000*m_maxSize);
m_sailAngleAnimation->setCurrentTime(step*2000*m_maxSize);
m_posAnimation->setCurrentTime(step*2000*m_maxSize);
int index = floor(step * m_maxSize);
BoatModel *boat;
for (int i=m_track->size()-1; i > index; i--) {
boat = m_track->boats()[i];
m_boats.push_back(boat);
m_track->deleteBoat(boat);
}
if (!m_boats.isEmpty()) {
for (int i = m_track->size()-1; i < index; i++) {
m_track->addBoat(m_boats.last());
m_boats.pop_back();
}
}
if (index > m_track->size() - 1) {
return;
}
boat = m_track->boats()[index];
m_boat->boat()->setOverlap(boat->overlap());
m_boat->boat()->setFlag(boat->flag());
m_boat->boat()->setText(boat->text());
m_boat->boat()->setTextPosition(boat->textPosition());
m_boat->boat()->setSpin(boat->spin());
// trigger next update rate calculation
m_time.start();
}
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