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Add a point constrain method to region

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Force a point to not exceed the region boundaries.
This commit is contained in:
Danny Robson 2013-08-05 16:38:05 +10:00
parent ff55c368cf
commit f256f4d0e9
2 changed files with 11 additions and 2 deletions
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10
region.cpp
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@ -136,9 +136,17 @@ region<T>::overlaps (const region<T> &rhs) const {
//-----------------------------------------------------------------------------
template <typename T>
void
region<T>::constrain (point2 &p) const {
p.x = std::min (std::max (static_cast<T> (p.x), x), x + w);
p.y = std::min (std::max (static_cast<T> (p.y), y), y + h);
}
template <typename T>
point2
region<T>::constrain (const point2 &p) const {
region<T>::constrained (const point2 &p) const {
point2 v;
v.x = std::min (std::max (static_cast<T> (p.x), x), x + w);
v.y = std::min (std::max (static_cast<T> (p.y), y), y + h);

3
region.hpp
View File

@ -57,7 +57,8 @@ namespace util {
bool contains (const point2&) const; // exclusive of borders
bool overlaps (const region<T>&) const; // exclusive of borders
point2 constrain (const point2&) const;
void constrain (point2&) const;
point2 constrained (const point2&) const;
region overlap (const region<T>&) const;