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| 1 | #ifndef __TOUCHLIB_RECT2D__
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|---|---|
| 2 | #define __TOUCHLIB_RECT2D__
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| 3 | |
| 4 | #include "vector2d.h" |
| 5 | |
| 6 | // The following code was originally written by Nikolaus Gebhardt as part of Irrlicht.
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| 7 | // See www.irrlicht3d.org
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| 8 | |
| 9 | // The Irrlicht Engine License
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| 10 | // Copyright © 2002-2005 Nikolaus Gebhardt
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| 11 | // This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held
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| 12 | // liable for any damages arising from the use of this software.
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| 13 | //
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| 14 | // Permission is granted to anyone to use this software for any purpose, including commercial applications, and to
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| 15 | // alter it and redistribute it freely, subject to the following restrictions:
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| 16 | //
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| 17 | // 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
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| 18 | // If you use this software in a product, an acknowledgment in the product documentation would be appreciated but
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| 19 | // is not required.
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| 20 | // 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
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| 21 | // 3. This notice may not be removed or altered from any source distribution.
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| 22 | |
| 23 | //! Rectangle template.
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| 24 | |
| 25 | |
| 26 | |
| 27 | template <class T> |
| 28 | class rect |
| 29 | {
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| 30 | public:
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| 31 | |
| 32 | rect() |
| 33 | : upperLeftCorner(0,0), lowerRightCorner(0,0) {}; |
| 34 | |
| 35 | |
| 36 | rect(T x, T y, T x2, T y2) |
| 37 | : upperLeftCorner(x,y), lowerRightCorner(x2,y2) {};
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| 38 | |
| 39 | |
| 40 | rect(const vector2d<T>& upperLeft, const vector2d<T>& lowerRight) |
| 41 | : upperLeftCorner(upperLeft), lowerRightCorner(lowerRight) {};
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| 42 | |
| 43 | inline void addPoint(const vector2d<T> &pt) |
| 44 | {
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| 45 | if(upperLeftCorner == vector2d<T>(0,0) && lowerRightCorner == vector2d<T>(0,0)) |
| 46 | {
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| 47 | upperLeftCorner = pt; |
| 48 | lowerRightCorner = pt; |
| 49 | return;
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| 50 | } |
| 51 | |
| 52 | if(pt.X < upperLeftCorner.X)
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| 53 | upperLeftCorner.X = pt.X; |
| 54 | if(pt.Y < upperLeftCorner.Y)
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| 55 | upperLeftCorner.Y = pt.Y; |
| 56 | |
| 57 | if(pt.X > lowerRightCorner.X)
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| 58 | lowerRightCorner.X = pt.X; |
| 59 | if(pt.Y > lowerRightCorner.Y)
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| 60 | lowerRightCorner.Y = pt.Y; |
| 61 | }; |
| 62 | |
| 63 | inline void addPoint(T x, T y) |
| 64 | {
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| 65 | if(upperLeftCorner == vector2d<T>(0,0) && lowerRightCorner == vector2d<T>(0,0)) |
| 66 | {
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| 67 | upperLeftCorner.X = x; |
| 68 | upperLeftCorner.Y = y; |
| 69 | lowerRightCorner.X = x; |
| 70 | lowerRightCorner.Y = y; |
| 71 | return;
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| 72 | } |
| 73 | |
| 74 | if(x < upperLeftCorner.X)
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| 75 | upperLeftCorner.X = x; |
| 76 | if(y < upperLeftCorner.Y)
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| 77 | upperLeftCorner.Y = y; |
| 78 | |
| 79 | if(x > lowerRightCorner.X)
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| 80 | lowerRightCorner.X = x; |
| 81 | if(y > lowerRightCorner.Y)
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| 82 | lowerRightCorner.Y = y; |
| 83 | }; |
| 84 | |
| 85 | |
| 86 | void reset(const vector2d<T> &pt) |
| 87 | {
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| 88 | upperLeftCorner = pt; |
| 89 | lowerRightCorner = pt; |
| 90 | } |
| 91 | |
| 92 | bool isPointInside(const vector2d<T>& pos) const |
| 93 | {
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| 94 | return upperLeftCorner.X <= pos.X && upperLeftCorner.Y <= pos.Y &&
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| 95 | lowerRightCorner.X >= pos.X && lowerRightCorner.Y >= pos.Y; |
| 96 | } |
| 97 | |
| 98 | //! Returns if the rectangle collides with an other rectangle.
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| 99 | bool isRectCollided(const rect<T>& other) const |
| 100 | {
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| 101 | return (lowerRightCorner.Y > other.upperLeftCorner.Y && upperLeftCorner.Y < other.lowerRightCorner.Y &&
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| 102 | lowerRightCorner.X > other.upperLeftCorner.X && upperLeftCorner.X < other.lowerRightCorner.X); |
| 103 | } |
| 104 | |
| 105 | //! Returns if the rectangle collides with an other rectangle.
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| 106 | bool isBoxInside(const rect<T>& other) const |
| 107 | {
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| 108 | //return (this->isPointInside(other.upperLeftCorner) && this->isPointInside(other.lowerRightCorner));
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| 109 | return (other.upperLeftCorner.Y >= upperLeftCorner.Y && other.upperLeftCorner.X >= upperLeftCorner.X &&
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| 110 | other.lowerRightCorner.Y <= lowerRightCorner.Y && other.lowerRightCorner.X <= lowerRightCorner.X); |
| 111 | } |
| 112 | |
| 113 | //! Returns width of rectangle.
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| 114 | T getWidth() const
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| 115 | {
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| 116 | return lowerRightCorner.X - upperLeftCorner.X;
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| 117 | } |
| 118 | |
| 119 | //! Returns height of rectangle.
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| 120 | T getHeight() const
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| 121 | {
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| 122 | return lowerRightCorner.Y - upperLeftCorner.Y;
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| 123 | } |
| 124 | |
| 125 | //! Returns the center of the rectangle
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| 126 | vector2d<T> getCenter() const
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| 127 | {
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| 128 | return vector2d<T>((upperLeftCorner.X + lowerRightCorner.X) / 2, |
| 129 | (upperLeftCorner.Y + lowerRightCorner.Y) / 2);
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| 130 | } |
| 131 | |
| 132 | T getArea() const
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| 133 | {
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| 134 | return getHeight() * getWidth();
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| 135 | } |
| 136 | |
| 137 | |
| 138 | //! Clips this rectangle with another one.
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| 139 | void clipAgainst(const rect<T>& other) |
| 140 | {
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| 141 | if (other.lowerRightCorner.X < lowerRightCorner.X)
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| 142 | lowerRightCorner.X = other.lowerRightCorner.X; |
| 143 | if (other.lowerRightCorner.Y < lowerRightCorner.Y)
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| 144 | lowerRightCorner.Y = other.lowerRightCorner.Y; |
| 145 | |
| 146 | if (other.upperLeftCorner.X > upperLeftCorner.X)
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| 147 | upperLeftCorner.X = other.upperLeftCorner.X; |
| 148 | if (other.upperLeftCorner.Y > upperLeftCorner.Y)
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| 149 | upperLeftCorner.Y = other.upperLeftCorner.Y; |
| 150 | |
| 151 | // correct possible invalid rect resulting from clipping
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| 152 | if (upperLeftCorner.Y > lowerRightCorner.Y)
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| 153 | upperLeftCorner.Y = lowerRightCorner.Y; |
| 154 | if (upperLeftCorner.X > lowerRightCorner.X)
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| 155 | upperLeftCorner.X = lowerRightCorner.X; |
| 156 | } |
| 157 | |
| 158 | |
| 159 | |
| 160 | vector2d<T> upperLeftCorner; |
| 161 | vector2d<T> lowerRightCorner; |
| 162 | }; |
| 163 | |
| 164 | //! Typedef for float 2d vector.
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| 165 | typedef rect<float> rect2df; |
| 166 | |
| 167 | #endif
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