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Add more functions to class Rect

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This commit is contained in:
Kirigaya Kazuto 2017-05-09 10:53:02 +08:00
parent bb563d069d
commit d8d77a5bd2
2 changed files with 51 additions and 2 deletions
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45
MiniEngine.cpp
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@ -126,12 +126,17 @@ namespace MiniEngine
h = H; h = H;
} }
Rect::Rect(const SDL_Rect& r):Rect(r.x,r.y,r.w,r.h)
{
}
Rect::Rect() Rect::Rect()
{ {
x = y = w = h = 0; x = y = w = h = 0;
} }
SDL_Rect Rect::toSDLRect() SDL_Rect Rect::toSDLRect() const
{ {
SDL_Rect r; SDL_Rect r;
r.x = x; r.x = x;
@ -141,6 +146,44 @@ namespace MiniEngine
return r; return r;
} }
bool Rect::isEmpty()
{
SDL_Rect r=toSDLRect();
return SDL_RectEmpty(&r)==SDL_TRUE;
}
bool Rect::operator == (const Rect& r) const
{
SDL_Rect a=toSDLRect(),b=r.toSDLRect();
return SDL_RectEquals(&a,&b)==SDL_TRUE;
}
bool Rect::hasIntersection(const Rect& r)
{
SDL_Rect a=toSDLRect(),b=r.toSDLRect();
return SDL_HasIntersection(&a,&b)==SDL_TRUE;
}
Rect Rect::getIntersection(const Rect& r)
{
SDL_Rect a=toSDLRect(),b=r.toSDLRect(),c;
if(SDL_IntersectRect(&a,&b,&c)==SDL_TRUE)
{
return Rect(c);
}
else
{
return Rect();
}
}
Rect Rect::getUnion(const Rect& r)
{
SDL_Rect a=toSDLRect(),b=r.toSDLRect(),c;
SDL_UnionRect(&a,&b,&c);//void
return Rect(c);
}
Point::Point(int X, int Y) Point::Point(int X, int Y)
{ {
x = X; x = X;

8
MiniEngine.h
View File

@ -33,8 +33,14 @@ namespace MiniEngine
public: public:
int x, y, w, h; int x, y, w, h;
Rect(int X, int Y, int W, int H); Rect(int X, int Y, int W, int H);
Rect(const SDL_Rect&);
Rect(); Rect();
SDL_Rect toSDLRect(); SDL_Rect toSDLRect() const;
bool isEmpty();
bool operator == (const Rect&) const;
bool hasIntersection(const Rect&);
Rect getIntersection(const Rect&);
Rect getUnion(const Rect&);
}; };
class Point class Point