Removed BBox, renamed position to origin

I've replaced the BBox class with a pair of inline functions in
check_bounds.hpp. I've also renamed the 'position' variable to 'origin' in
several locations.

These changes are mostly to alleviate ambiguity.

common/utilities/bbox.hpp

@@ -1,75 +0,0 @@
-/* Copyright: (c) Kayne Ruse 2013, 2014
- * 
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event will the authors be held liable for any damages
- * arising from the use of this software.
- * 
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- * 
- * 1. The origin of this software must not be misrepresented; you must not
- * claim that you wrote the original software. If you use this software
- * in a product, an acknowledgment in the product documentation would be
- * appreciated but is not required.
- * 
- * 2. Altered source versions must be plainly marked as such, and must not be
- * misrepresented as being the original software.
- * 
- * 3. This notice may not be removed or altered from any source
- * distribution.
-*/
-#ifndef BBOX_HPP_
-#define BBOX_HPP_
-
-#include <type_traits>
-#include <stdexcept>
-#include <algorithm>
-
-//TODO: This is supposed to interact with the vector
-class BBox {
-public:
-	double x, y;
-	double w, h;
-
-	BBox() = default;
-	BBox(double i, double j, double k, double l): x(i), y(j), w(k), h(l) {};
-	~BBox() = default;
-	BBox& operator=(BBox const&) = default;
-
-	double Size() {
-		return std::max(w*h,0.0);
-	}
-
-	bool IsCollision(BBox rhs) {
-		return not (
-			x >= rhs.x + rhs.w ||
-			y >= rhs.y + rhs.h ||
-			rhs.x >= x + w ||
-			rhs.y >= y + h
-		);
-	}
-
-	BBox Intersection(BBox rhs) {
-		if (!IsCollision(rhs)) {
-			return {0, 0, 0, 0};
-		}
-		BBox ret;
-		ret.x = std::max(x, rhs.x);
-		ret.y = std::max(y, rhs.y);
-		ret.w = std::min(x+w, rhs.x+rhs.w) - ret.x;
-		ret.h = std::min(y+h, rhs.y+rhs.h) - ret.y;
-		return ret;
-	}
-
-	double operator[](size_t i) {
-		if (i >= 4)
-			throw(std::domain_error("Out of range"));
-		return *(&x+i);
-	}
-};
-
-//This is explicitly a POD
-static_assert(std::is_pod<BBox>::value, "BBox is not a POD");
-
-#endif

common/utilities/check_bounds.cpp

@@ -0,0 +1,40 @@
+/* Copyright: (c) Kayne Ruse 2014
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#include "check_bounds.hpp"
+
+bool checkPoint(Vector2 const& origin, Vector2 const& bound, Vector2 const& point) {
+	return !(
+		point.x < origin.x ||
+		point.y < origin.y ||
+		point.x >= origin.x + bound.x ||
+		point.y >= origin.y + bound.y
+	);
+}
+
+bool checkOverlap(Vector2 const& originOne, Vector2 const& boundOne, Vector2 const& originTwo, Vector2 const& boundTwo) {
+	return !(
+		originOne.x >= originTwo.x + boundTwo.x ||
+		originOne.x + boundOne.x >= originTwo.x ||
+		originOne.y >= originTwo.y + boundTwo.y ||
+		originOne.y + boundOne.y >= originTwo.y
+	);
+}

common/utilities/check_bounds.hpp

@@ -0,0 +1,30 @@
+/* Copyright: (c) Kayne Ruse 2014
+ * 
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ * 
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ * 
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+*/
+#ifndef CHECKBOUNDS_HPP_
+#define CHECKBOUNDS_HPP_
+
+#include "vector2.hpp"
+
+bool checkPoint(Vector2 const& origin, Vector2 const& bound, Vector2 const& point);
+bool checkOverlap(Vector2 const& originOne, Vector2 const& boundOne, Vector2 const& originTwo, Vector2 const& boundTwo);
+
+#endif

common/utilities/vector2.hpp

@@ -42,12 +42,6 @@ public:
 		return x*x+y*y;
 	}
 
-	double operator[](size_t i) {
-		if (i >= 2)
-			throw(std::domain_error("Out of range"));
-		return *(&x+i);
-	}
-
 	//Arithmetic operators
 	Vector2 operator+(Vector2 v) const {
 		Vector2 ret;