bool Polygon::Intersects(const Circle& other) const
{
const Polygon& B = *this;
if (Intersects(other.Position()))
return true; // If the center of the circle is inside the polygon
for (int i = 0; i < B.NumPoints(); ++i)
{
if (other.Intersects(Segment(B[i], B[i + 1])))
return true;
}
return false;
}
Polygon::Polygon(const Circle& circle, int num)
: FConvex(circle.Position()), m_vPoints(num)
{
real angle = -2*pi/num;
real sint = sin(angle);
real cost = cos(angle);
Point current(-circle.Radius(), 0);
for (int i = 0; i < num; ++i)
{
m_vPoints[i] = current;
current.Rotate(sint, cost);
}
}
void test_three()
{
Circle *circle ;
Point *point ;
Shape *shape ;
IMethod *ptr ;
double area = 0.0 ;
circle = New(Circle) ;
circle->Set(circle , 10.0 , 20.0) ;
circle->Move(circle , 100.0 , 300.0) ;
circle->Position(circle) ;
circle->SetRadius(circle , 30.0) ;
area = circle->Area(circle) ;
circle->SetCircle(circle , 1.0 , 2.0 , 3.0) ;
shape = (Shape*)circle ;
shape->Position(shape) ;
area = shape->Area(shape) ;
point = (Point*)circle ;
point->Move(point , 1000.0 , 2000.0) ;
point->Position(point) ;
circle->AddRadius(circle , 50.0) ;
area = point->Area(point) ;
ptr = (IMethod*)circle ;
// area = ptr->Area() ;
ptr->GetClassName() ;
Delete(ptr) ;
}