DirArrayGen::DirArrayGen( Vec2D const& d )
{
difPos = Vec2D(0,0);
dir = ( 1.0f / sqrtf( d.length2() ) ) * d;
num = 1;
offset = 2;
}
void SimpleGen::generate( Weapon* weapon )
{
Object* owner = weapon->owner;
Object* destObj = weapon->destObj;
Vec2D dif = destObj->getPos() - owner->getPos();
float s= sqrtf(dif.length2());
Vec2D speed = ( weapon->bulletSpeed / s ) * dif;
Object* bullet = weapon->createBullet();
bullet->setVelocity( speed );
spawnObject(bullet);
}
void CircleMove::update( Object& obj , long time )
{
float len = m_speed * time / 1000.0f;
Vec2D dir = getCenterPos( obj ) - org;
float d = sqrtf( dir.length2() );
if ( d < 0.001 )
return;
if( fabs( radius - d ) > len )
{
if ( d > radius )
{
obj.setVelocity( (-len / d)* dir );
return;
}
else
{
obj.setVelocity( (len / d) * dir );
return;
}
}
float cos_ = ( radius*radius + d*d - len*len ) / ( 2 * radius * d );
if ( fabs( cos_ ) > 1 )
return;
float theta = acos( cos_ );
Vec2D rDir = ( radius / d ) * dir;
Vec2D dotDir( -rDir.y , rDir.x );
if ( !isClockwise )
dotDir = - dotDir;
Vec2D outSpeed = ( cos( theta )* rDir) + ( sin( theta ) * dotDir) - dir;
obj.setVelocity( outSpeed );
}
void DirArrayGen::setDir( Vec2D const& d )
{
dir = ( 1.0f / sqrtf( d.length2() ) ) * d;
}
void Follow::update( Object& obj , long time)
{
Vec2D dif = destObj->getPos() - getCenterPos( obj );
float s= sqrtf( dif.length2() );
obj.setVelocity( speed * time / (1000 *s ) * dif );
}
