rect.h

/*
**  ClanLib SDK
**  Copyright (c) 1997-2020 The ClanLib Team
**
**  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.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
**    Kenneth Gangstoe
**    Harry Storbacka
**    Mark Page
*/

#pragma once

#include "vec2.h"
#include "size.h"
#include "point.h"
#include "origin.h"
#include "cl_math.h"

namespace clan
{

        template<typename Type>
        class Rectx
        {
        public:
                Rectx() : left(0), top(0), right(0), bottom(0) {}

                Rectx(const Sizex<Type> &s) : left(0), top(0), right(s.width), bottom(s.height) {}

                Rectx(Type new_left, Type new_top, Type new_right, Type new_bottom)
                        : left(new_left), top(new_top), right(new_right), bottom(new_bottom) {}

                Rectx(const Pointx<Type> &p, const Sizex<Type> &size)
                        : left(p.x), top(p.y), right(p.x + size.width), bottom(p.y + size.height) {}

                Rectx(Type new_left, Type new_top, const Sizex<Type> &size)
                        : left(new_left), top(new_top), right(new_left + size.width), bottom(new_top + size.height) {}

                Rectx(const Rectx<Type> &rect) = default;

                template<typename OtherType, typename std::enable_if_t<std::is_integral<Type>::value && !std::is_integral<OtherType>::value, int> = 0>
                Rectx(const Rectx<OtherType>& copy) : left(static_cast<Type>(std::floor(copy.left + 0.5f))), top(static_cast<Type>(std::floor(copy.top + 0.5f))), right(static_cast<Type>(std::floor(copy.right + 0.5f))), bottom(static_cast<Type>(std::floor(copy.bottom + 0.5f))) {}

                template<typename OtherType, typename std::enable_if_t<!std::is_integral<Type>::value || std::is_integral<OtherType>::value, int> = 0>
                Rectx(const Rectx<OtherType>& copy) : left(static_cast<Type>(copy.left)), top(static_cast<Type>(copy.top)), right(static_cast<Type>(copy.right)), bottom(static_cast<Type>(copy.bottom)) {}

                bool operator==(const Rectx<Type> &r) const
                {
                        return (left == r.left && top == r.top && right == r.right && bottom == r.bottom);
                }

                bool operator!=(const Rectx<Type> &r) const
                {
                        return (left != r.left || top != r.top || right != r.right || bottom != r.bottom);
                }

                Rectx<Type> &operator*=(const Type &s)
                {
                        left *= s; top *= s; right *= s; bottom *= s; return *this;
                }

                Rectx<Type> operator*(const Type &s) const
                {
                        return Rectx<Type>(left*s, top*s, right*s, bottom *s);
                }

                static Rectx<Type> xywh(Type x, Type y, Type width, Type height) { return Rectx<Type>(x, y, x + width, y + height); }
                static Rectx<Type> ltrb(Type left, Type top, Type right, Type bottom) { return Rectx<Type>(left, top, right, bottom); }

                Type left;

                Type top;

                Type right;

                Type bottom;

                Type get_width() const { return right - left; }

                Type get_height() const { return bottom - top; }

                Sizex<Type> get_size() const { return Sizex<Type>(right - left, bottom - top); }

                bool contains(const Vec2<Type> &p) const
                {
                        return (p.x >= left && p.x < right)
                                && (p.y >= top && p.y < bottom);
                }

                Pointx<Type> get_top_left() const
                {
                        return Pointx<Type>(left, top);
                }

                Pointx<Type> get_top_right() const
                {
                        return Pointx<Type>(right, top);
                }

                Pointx<Type> get_bottom_right() const
                {
                        return Pointx<Type>(right, bottom);
                }

                Pointx<Type> get_bottom_left() const
                {
                        return Pointx<Type>(left, bottom);
                }

                bool is_overlapped(const Rectx<Type> &r) const
                {
                        return (r.left < right && r.right > left && r.top < bottom && r.bottom > top);
                }

                bool is_inside(const Rectx<Type> &r) const
                {
                        return ((left <= r.left)
                                && (top <= r.top)
                                && (right >= r.right)
                                && (bottom >= r.bottom));
                }

                Rectx<Type> get_rot_bounds(const Vec2<Type> &hotspot, const Angle &angle) const;

                Rectx<Type> get_rot_bounds(Origin origin, Type x, Type y, const Angle &angle) const;

                Pointx<Type> get_center() const
                {
                        return Pointx<Type>((left + right) / 2, (top + bottom) / 2);
                }

                Rectx<Type> &set_top_left(const Vec2<Type>& p)
                {
                        left = p.x;
                        top = p.y;
                        return *this;
                }

                Rectx<Type> &set_bottom_right(const Vec2<Type>& p)
                {
                        right = p.x;
                        bottom = p.y;
                        return *this;
                }

                Rectx<Type> &set_width(Type width)
                {
                        right = left + width;
                        return *this;
                }

                Rectx<Type> &set_height(Type height)
                {
                        bottom = top + height;
                        return *this;
                }

                Rectx<Type> &shrink(const Type &new_left, const Type &new_top, const Type &new_right, const Type &new_bottom)
                {
                        left += new_left; top += new_top; right -= new_right; bottom -= new_bottom;
                        return *this;
                };

                Rectx<Type> &shrink(const Type &left_right, const Type &top_bottom)
                {
                        left += left_right; top += top_bottom; right -= left_right; bottom -= top_bottom;
                        return *this;
                };

                Rectx<Type> &shrink(const Type &shrink)
                {
                        left += shrink; top += shrink; right -= shrink; bottom -= shrink;
                        return *this;
                };

                Rectx<Type> &expand(const Type &expand_left, const Type &expand_top, const Type &expand_right, const Type &expand_bottom)
                {
                        left -= expand_left; top -= expand_top; right += expand_right; bottom += expand_bottom;
                        return *this;
                };

                Rectx<Type> &expand(const Type &left_and_right, const Type &top_and_bottom)
                {
                        left -= left_and_right;
                        right += left_and_right;
                        top -= top_and_bottom;
                        bottom += top_and_bottom;
                        return *this;
                };

                Rectx<Type> &expand(const Type &expand)
                {
                        left -= expand;
                        right += expand;
                        top -= expand;
                        bottom += expand;
                        return *this;
                };

                Rectx<Type> &translate(const Vec2<Type> &p)
                {
                        left += p.x; top += p.y; right += p.x; bottom += p.y;
                        return *this;
                };

                Rectx<Type> &translate(const Sizex<Type> &p)
                {
                        left += p.width; top += p.height; right += p.width; bottom += p.height;
                        return *this;
                };

                Rectx<Type> &translate(const Rectx<Type> &p)
                {
                        left += p.left; top += p.top; right += p.left; bottom += p.top;
                        return *this;
                };

                Rectx<Type> &translate(Type x, Type y)
                {
                        left += x; top += y; right += x; bottom += y;
                        return *this;
                };

                Rectx<Type> &set_size(const Sizex<Type> &size)
                {
                        right = left + size.width;
                        bottom = top + size.height;
                        return *this;
                }

                Rectx<Type> &overlap(const Rectx<Type> &rect)
                {
                        Rectx<Type> result;
                        result.left = max(left, rect.left);
                        result.right = min(right, rect.right);
                        result.top = max(top, rect.top);
                        result.bottom = min(bottom, rect.bottom);
                        if (result.right < result.left)
                                result.left = result.right;
                        if (result.bottom < result.top)
                                result.top = result.bottom;

                        *this = result;
                        return *this;
                }

                Rectx<Type> &bounding_rect(const Rectx<Type> &rect)
                {
                        Rectx<Type> result;
                        result.left = min(left, rect.left);
                        result.right = max(right, rect.right);
                        result.top = min(top, rect.top);
                        result.bottom = max(bottom, rect.bottom);
                        *this = result;
                        return *this;
                }

                Rectx<Type> &normalize()
                {
                        if (left > right)
                                right = left;

                        if (top > bottom)
                                bottom = top;

                        return *this;
                }

                Rectx<Type> &apply_alignment(Origin origin, Type x, Type y)
                {
                        Vec2<Type> offset = Vec2<Type>::calc_origin(origin, get_size());
                        offset.x -= x;
                        offset.y -= y;

                        left += offset.x;
                        top += offset.y;
                        right += offset.x;
                        bottom += offset.y;
                        return *this;
                }

                Rectx<Type> &clip(const Rectx<Type> &cr)
                {
                        top = max(top, cr.top);
                        left = max(left, cr.left);
                        right = min(right, cr.right);
                        bottom = min(bottom, cr.bottom);
                        top = min(top, bottom);
                        left = min(left, right);
                        return *this;
                }
        };

        class Rect : public Rectx<int>
        {
        public:
                Rect() : Rectx<int>() {}
                Rect(const Sizex<int>& s) : Rectx<int>(s) {}
                Rect(int new_left, int new_top, int new_right, int new_bottom) : Rectx<int>(new_left, new_top, new_right, new_bottom) {}
                Rect(const Pointx<int>& p, const Sizex<int>& size) : Rectx<int>(p, size) {}
                Rect(const Rectx<int>& rect) : Rectx<int>(rect) {}
                Rect(const Rectx<float>& rect) : Rectx<int>(rect) {}
                Rect(const Rectx<double>& rect) : Rectx<int>(rect) {}
                Rect(int new_left, int new_top, const Sizex<int>& size) : Rectx<int>(new_left, new_top, size) {}
        };

        class Rectf : public Rectx<float>
        {
        public:
                Rectf() : Rectx<float>() {}
                Rectf(const Sizex<int>& s) : Rectx<float>(s) {}
                Rectf(const Sizex<float>& s) : Rectx<float>(s) {}
                Rectf(float new_left, float new_top, float new_right, float new_bottom) : Rectx<float>(new_left, new_top, new_right, new_bottom) {}
                Rectf(const Pointx<float>& p, const Sizex<float>& size) : Rectx<float>(p, size) {}
                Rectf(const Rectx<int>& rect) : Rectx<float>(rect) {}
                Rectf(const Rectx<float>& rect) : Rectx<float>(rect) {}
                Rectf(const Rectx<double>& rect) : Rectx<float>(rect) {}
                Rectf(float new_left, float new_top, const Sizex<float>& size) : Rectx<float>(new_left, new_top, size) {}
        };

        class Rectd : public Rectx<double>
        {
        public:
                Rectd() : Rectx<double>() {}
                Rectd(const Sizex<int>& s) : Rectx<double>(s) {}
                Rectd(const Sizex<float>& s) : Rectx<double>(s) {}
                Rectd(const Sizex<double>& s) : Rectx<double>(s) {}
                Rectd(double new_left, double new_top, double new_right, double new_bottom) : Rectx<double>(new_left, new_top, new_right, new_bottom) {}
                Rectd(const Pointx<double>& p, const Sizex<double>& size) : Rectx<double>(p, size) {}
                Rectd(const Rectx<int>& rect) : Rectx<double>(rect) {}
                Rectd(const Rectx<float>& rect) : Rectx<double>(rect) {}
                Rectd(const Rectx<double>& rect) : Rectx<double>(rect) {}
                Rectd(double new_left, double new_top, const Sizex<double>& size) : Rectx<double>(new_left, new_top, size) {}
        };

        inline Rect RectPS(int x, int y, int width, int height)
        {
                return Rect(x, y, x + width, y + height);
        }

        inline Rectf RectfPS(float x, float y, float width, float height)
        {
                return Rectf(x, y, x + width, y + height);
        }

        inline Rectd RectdPS(double x, double y, double width, double height)
        {
                return Rectd(x, y, x + width, y + height);
        }

}