FilesExpand file tree

master

/

Enemy.cpp

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

50 lines (41 loc) · 1.19 KB

master

/

Enemy.cpp

Copy path

Top

File metadata and controls

• Code
• Blame

50 lines (41 loc) · 1.19 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

#include "Enemy.h"

#include <QPixmap>

#include <QTimer>

#include <qmath.h>

#include <QDebug>

Enemy::Enemy(QGraphicsItem *parent){

// set graphics

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

// set points

points << QPointF(200,200) << QPointF(400,200); // move down-right then right

point_index = 0;

dest = points[0];

rotateToPoint(dest);

// connect timer to move_forward

QTimer * timer = new QTimer(this);

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

timer->start(150);

}

void Enemy::rotateToPoint(QPointF p){

QLineF ln(pos(),p);

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

}

void Enemy::move_forward(){

// 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;

}

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);

}