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@@ -28,8 +28,7 @@
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/// The class \ref lemon::dim2::Point "dim2::Point" implements
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/// a two dimensional vector with the usual operations.
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///
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/// The class \ref lemon::dim2::BoundingBox "dim2::BoundingBox"
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/// can be used to determine
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/// The class \ref lemon::dim2::Box "dim2::Box" can be used to determine
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/// the rectangular bounding box of a set of
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/// \ref lemon::dim2::Point "dim2::Point"'s.
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@@ -44,7 +43,7 @@
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/// \addtogroup misc
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/// @{
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/// A simple two dimensional vector (plain vector) implementation
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/// Two dimensional vector (plain vector)
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/// A simple two dimensional vector (plain vector) implementation
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/// with the usual vector operations.
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@@ -221,7 +220,7 @@
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template<typename T>
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inline std::ostream& operator<<(std::ostream &os, const Point<T>& z)
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{
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os << "(" << z.x << ", " << z.y << ")";
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os << "(" << z.x << "," << z.y << ")";
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return os;
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}
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@@ -260,67 +259,67 @@
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/// A class to calculate or store the bounding box of plain vectors.
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/// Bounding box of plain vectors (\ref Point points).
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/// A class to calculate or store the bounding box of plain vectors.
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///
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template<typename T>
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class BoundingBox {
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/// A class to calculate or store the bounding box of plain vectors
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/// (\ref Point points).
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template<typename T>
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class Box {
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Point<T> _bottom_left, _top_right;
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bool _empty;
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public:
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///Default constructor: creates an empty bounding box
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BoundingBox() { _empty = true; }
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///Default constructor: creates an empty box
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Box() { _empty = true; }
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///Construct an instance from one point
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BoundingBox(Point<T> a) {
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///Construct a box from one point
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Box(Point<T> a) {
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_bottom_left = _top_right = a;
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_empty = false;
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}
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///Construct an instance from two points
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///Construct a box from two points
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///Construct an instance from two points.
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///Construct a box from two points.
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///\param a The bottom left corner.
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///\param b The top right corner.
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///\warning The coordinates of the bottom left corner must be no more
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///than those of the top right one.
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BoundingBox(Point<T> a,Point<T> b)
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Box(Point<T> a,Point<T> b)
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{
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_bottom_left = a;
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_top_right = b;
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_empty = false;
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}
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///Construct an instance from four numbers
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///Construct a box from four numbers
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///Construct an instance from four numbers.
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///Construct a box from four numbers.
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///\param l The left side of the box.
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///\param b The bottom of the box.
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///\param r The right side of the box.
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///\param t The top of the box.
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///\warning The left side must be no more than the right side and
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///bottom must be no more than the top.
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BoundingBox(T l,T b,T r,T t)
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Box(T l,T b,T r,T t)
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{
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_bottom_left=Point<T>(l,b);
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_top_right=Point<T>(r,t);
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_empty = false;
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}
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///Return \c true if the bounding box is empty.
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///Return \c true if the box is empty.
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///Return \c true if the bounding box is empty (i.e. return \c false
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///Return \c true if the box is empty (i.e. return \c false
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///if at least one point was added to the box or the coordinates of
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///the box were set).
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///
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///The coordinates of an empty bounding box are not defined.
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///The coordinates of an empty box are not defined.
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bool empty() const {
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return _empty;
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}
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///Make the BoundingBox empty
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///Make the box empty
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void clear() {
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_empty = true;
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}
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@@ -328,7 +327,7 @@
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///Give back the bottom left corner of the box
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///Give back the bottom left corner of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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Point<T> bottomLeft() const {
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return _bottom_left;
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}
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@@ -344,7 +343,7 @@
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///Give back the top right corner of the box
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///Give back the top right corner of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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Point<T> topRight() const {
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return _top_right;
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}
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@@ -360,7 +359,7 @@
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///Give back the bottom right corner of the box
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///Give back the bottom right corner of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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Point<T> bottomRight() const {
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return Point<T>(_top_right.x,_bottom_left.y);
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}
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@@ -377,7 +376,7 @@
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///Give back the top left corner of the box
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///Give back the top left corner of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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Point<T> topLeft() const {
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return Point<T>(_bottom_left.x,_top_right.y);
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}
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@@ -394,7 +393,7 @@
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///Give back the bottom of the box
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///Give back the bottom of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T bottom() const {
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return _bottom_left.y;
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}
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@@ -410,7 +409,7 @@
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///Give back the top of the box
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///Give back the top of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T top() const {
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return _top_right.y;
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}
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@@ -426,7 +425,7 @@
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///Give back the left side of the box
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///Give back the left side of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T left() const {
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return _bottom_left.x;
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}
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@@ -442,7 +441,7 @@
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/// Give back the right side of the box
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/// Give back the right side of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T right() const {
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return _top_right.x;
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}
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@@ -458,7 +457,7 @@
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///Give back the height of the box
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///Give back the height of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T height() const {
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return _top_right.y-_bottom_left.y;
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}
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@@ -466,12 +465,12 @@
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///Give back the width of the box
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///Give back the width of the box.
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///If the bounding box is empty, then the return value is not defined.
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///If the box is empty, then the return value is not defined.
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T width() const {
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return _top_right.x-_bottom_left.x;
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}
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///Checks whether a point is inside a bounding box
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///Checks whether a point is inside the box
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bool inside(const Point<T>& u) const {
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if (_empty)
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return false;
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@@ -481,11 +480,11 @@
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}
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}
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///Increments a bounding box with a point
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///Increments the box with a point
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///Increments a bounding box with a point.
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///Increments the box with a point.
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///
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BoundingBox& add(const Point<T>& u){
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Box& add(const Point<T>& u){
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if (_empty) {
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_bottom_left = _top_right = u;
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_empty = false;
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@@ -499,11 +498,11 @@
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return *this;
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}
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///Increments a bounding box to contain another bounding box
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///Increments the box to contain another box
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///Increments a bounding box to contain another bounding box.
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///Increments the box to contain another box.
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///
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BoundingBox& add(const BoundingBox &u){
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Box& add(const Box &u){
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if ( !u.empty() ){
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add(u._bottom_left);
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add(u._top_right);
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@@ -511,12 +510,12 @@
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return *this;
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}
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///Intersection of two bounding boxes
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///Intersection of two boxes
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///Intersection of two bounding boxes.
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///Intersection of two boxes.
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///
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BoundingBox operator&(const BoundingBox& u) const {
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BoundingBox b;
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Box operator&(const Box& u) const {
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Box b;
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520 |
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if (_empty || u._empty) {
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b._empty = true;
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} else {
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@@ -530,9 +529,50 @@
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return b;
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}
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};//class Boundingbox
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};//class Box
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///Read a box from a stream
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///Read a box from a stream.
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///\relates Box
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template<typename T>
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inline std::istream& operator>>(std::istream &is, Box<T>& b) {
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char c;
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Point<T> p;
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if (is >> c) {
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if (c != '(') is.putback(c);
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} else {
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is.clear();
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}
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if (!(is >> p)) return is;
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b.bottomLeft(p);
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if (is >> c) {
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if (c != ',') is.putback(c);
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} else {
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is.clear();
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}
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555 |
if (!(is >> p)) return is;
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b.topRight(p);
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557 |
if (is >> c) {
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if (c != ')') is.putback(c);
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} else {
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560 |
is.clear();
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}
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562 |
return is;
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}
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564 |
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565 |
///Write a box to a stream
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567 |
///Write a box to a stream.
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///\relates Box
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|
569 |
template<typename T>
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|
570 |
inline std::ostream& operator<<(std::ostream &os, const Box<T>& b)
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|
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{
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572 |
os << "(" << b.bottomLeft() << "," << b.topRight() << ")";
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|
573 |
return os;
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574 |
}
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575 |
|
536 |
576 |
///Map of x-coordinates of a \ref Point "Point"-map
|
537 |
577 |
|
538 |
578 |
///\ingroup maps
|