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#include "Enemy.h"

#include <QPixmap>

#include <QTimer>

#include <qmath.h>

#include <QDebug>

Enemy::Enemy(QList<QPointF> pointsToFollow, QGraphicsItem *parent){

// set graphics

setPixmap(QPixmap(":/images/enemy.png"));

// set points

points = pointsToFollow;

point_index = 0;

dest = points[0];

rotateToPoint(dest);

// connect timer to move_forward

QTimer * timer = new QTimer(this);

connect(timer,SIGNAL(timeout()),this,SLOT(moveForward()));

timer->start(150);

}

void Enemy::rotateToPoint(QPointF p){

QLineF ln(pos(),p);

setRotation(-1 * ln.angle());

}

void Enemy::moveForward(){

// if close to dest, rotate to next dest

QLineF ln(pos(),dest);

if (ln.length() < 5){

point_index++;

// last point reached

if (point_index >= points.size()){

return;

}

// last point not reached

dest = points[point_index];

rotateToPoint(dest);

}

// move enemy forward at current angle

int STEP_SIZE = 5;

double theta = rotation(); // degrees

double dy = STEP_SIZE * qSin(qDegreesToRadians(theta));

double dx = STEP_SIZE * qCos(qDegreesToRadians(theta));

setPos(x()+dx, y()+dy);

}

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Enemy.cpp

Enemy.cpp

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