asteroids-cs165/bullet.cpp
2020-06-30 20:04:55 -06:00

30 lines
589 B
C++

#include "bullet.h"
#include "ship.h"
#include <cmath>
#define M_PI 3.14159265
// Bullet non-default constructor
Bullet :: Bullet( const Point &point ) : FlyingObject() , framesAlive( 0 )
{
setPoint ( point );
}
// Fire Bullet
void Bullet :: fire ( const Velocity &vel , const float angle )
{
velocity.setDx ( BULLET_SPEED * ( -cos ( M_PI / 180 * angle ) ) );
velocity.setDy ( BULLET_SPEED * ( sin ( M_PI / 180 * angle ) ) );
}
// Advance Bullet
void Bullet :: advance ()
{
framesAlive++;
if ( framesAlive >= 40 )
{
kill();
}
FlyingObject :: advance();
}