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