clean up datatypes a bit

libstarlight/source/starlight/datatypes/VRect.cpp

@@ -8,13 +8,6 @@
 using starlight::Vector2;
 using starlight::VRect;
 
-VRect::VRect() : pos(Vector2()), size(Vector2()) { }
-
-VRect::~VRect() { }
-
-VRect::VRect(float x, float y, float w, float h) : pos(x, y), size(w, h) { }
-VRect::VRect(Vector2 pos, Vector2 size) : pos(pos), size(size) { }
-
 Vector2 VRect::Center() const { return pos + (size * 0.5f); }
 Vector2 VRect::TopLeft() const { return pos; }
 Vector2 VRect::TopRight() const { return Vector2(pos.x + size.x, pos.y); }
@@ -62,4 +55,6 @@ VRect VRect::LeftEdge(float width) const    { return VRect(pos.x, pos.y, width,
 VRect VRect::RightEdge(float width) const   { return VRect(pos.x + size.x - width, pos.y, width, size.y); }
 
 // constants
-const VRect VRect::zero = VRect(); // should initialize to 0,0,0,0
+const VRect VRect::invalid = VRect(Vector2::invalid, Vector2::invalid);
+
+const VRect VRect::zero = VRect(); // should initialize to 0,0,0,0

libstarlight/source/starlight/datatypes/VRect.h

@@ -12,10 +12,10 @@ namespace starlight {
         Vector2 pos;
         Vector2 size;
         
-        VRect();
+        constexpr VRect() = default;
-        VRect(float x, float y, float w, float h);
+        constexpr VRect(float x, float y, float w, float h) : pos(x, y), size(w, h) { }
-        VRect(Vector2 pos, Vector2 size);
+        constexpr VRect(Vector2 pos, Vector2 size) : pos(pos), size(size) { }
-        ~VRect();
+        ~VRect() = default;
         
         Vector2 Center() const;
         Vector2 TopLeft() const;
@@ -54,6 +54,9 @@ namespace starlight {
         inline VRect & operator += (const Vector2 & vec) { pos += vec; return *this; }
         inline VRect & operator -= (const Vector2 & vec) { pos -= vec; return *this; }
         
+        inline explicit operator bool() { return pos && size; }
+        
+        static const VRect invalid;
         static const VRect zero;
     };
 }

libstarlight/source/starlight/datatypes/Vector2.cpp

@@ -1,17 +1,12 @@
 #include <cstdlib>
 #include <cmath>
 #include <fastmath.h>
+#include <limits>
 
 #include "Vector2.h"
 
 using starlight::Vector2;
 
-Vector2::Vector2() : x(0.0f), y(0.0f) { }
-
-Vector2::~Vector2() { }
-
-Vector2::Vector2(float x, float y) : x(x), y(y) { }
-
 // maths
 float Vector2::Length() const { return sqrtf(x * x + y * y); }
 Vector2 Vector2::Normalized() const { float m = Length(); return m == 0.0f ? Vector2::zero : Vector2(x / m, y / m); }
@@ -35,9 +30,11 @@ Vector2 Vector2::RotateAround(const Vector2& anchor, float angle) const { return
 //inline Vector2 operator *(const Vector2* vec, const float scalar) { return Vector2(vec.x * scalar, vec.y * scalar); }
 
 // constants
+const Vector2 Vector2::invalid = Vector2(std::numeric_limits<double>::quiet_NaN());
+
 const Vector2 Vector2::zero = Vector2(0.0f, 0.0f);
 const Vector2 Vector2::one = Vector2(1.0f, 1.0f);
 const Vector2 Vector2::half = Vector2(0.5f, 0.5f);
 
 const Vector2 Vector2::h = Vector2(1, 0);
-const Vector2 Vector2::v = Vector2(0, 1);
+const Vector2 Vector2::v = Vector2(0, 1);

libstarlight/source/starlight/datatypes/Vector2.h

@@ -10,9 +10,10 @@ namespace starlight {
         float x = 0.0f;
         float y = 0.0f;
         
-        Vector2();
+        constexpr Vector2() = default;
-        Vector2(float x, float y);
+        constexpr Vector2(float x, float y) : x(x), y(y) { }
-        ~Vector2();
+        constexpr Vector2(float mag) : x(mag), y(mag) { }
+        ~Vector2() = default;
 
         float Length() const;
         Vector2 Normalized() const;
@@ -47,6 +48,9 @@ namespace starlight {
         inline Vector2 & operator -= (const Vector2 & o) { x -= o.x; y -= o.y; return *this; }
         inline Vector2 & operator *= (const Vector2 & o) { x *= o.x; y *= o.y; return *this; }
         
+        inline explicit operator bool() const { return x == x && y == y; }
+        
+        static const Vector2 invalid;
         static const Vector2 zero;
         static const Vector2 one;
         static const Vector2 half;