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