144 lines
4.3 KiB
C++
144 lines
4.3 KiB
C++
/*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
* Copyright 2010-2015 Danny Robson <danny@nerdcruft.net>
|
|
*/
|
|
|
|
|
|
#ifndef __UTIL_REGION_HPP
|
|
#define __UTIL_REGION_HPP
|
|
|
|
#include "extent.hpp"
|
|
#include "point.hpp"
|
|
#include "vector.hpp"
|
|
#include "types/traits.hpp"
|
|
|
|
#include <ostream>
|
|
|
|
namespace util {
|
|
/**
|
|
* A two-dimensional rectangle, with size and position.
|
|
*/
|
|
template <size_t S, typename T>
|
|
struct region {
|
|
using position_type = T;
|
|
using size_type = typename try_unsigned<T>::type;
|
|
|
|
using extent_t = util::extent<S,size_type>;
|
|
using point_t = util::point<S,position_type>;
|
|
|
|
using value_type = T;
|
|
|
|
//---------------------------------------------------------------------
|
|
static constexpr size_t dimension = S;
|
|
static constexpr size_t elements = extent_t::elements + point_t::elements;
|
|
|
|
#if defined(COMPILER_CLANG)
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic ignored "-Wgnu-anonymous-struct"
|
|
#endif
|
|
union {
|
|
struct {
|
|
point_t p;
|
|
extent_t e;
|
|
};
|
|
struct {
|
|
T x, y;
|
|
T w, h;
|
|
};
|
|
};
|
|
#if defined(COMPILER_CLANG)
|
|
#pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
//---------------------------------------------------------------------
|
|
region () = default;
|
|
explicit region (extent_t);
|
|
region (point_t, extent_t);
|
|
region (point_t, point_t);
|
|
explicit region (std::array<T,S*2>);
|
|
|
|
//---------------------------------------------------------------------
|
|
template <typename U>
|
|
constexpr region<S,U> cast (void) const;
|
|
|
|
//---------------------------------------------------------------------
|
|
size_type area (void) const;
|
|
size_type diameter (void) const;
|
|
extent_t magnitude (void) const;
|
|
extent_t magnitude (extent_t);
|
|
|
|
void scale (size_type factor);
|
|
|
|
bool empty (void) const;
|
|
|
|
//---------------------------------------------------------------------
|
|
point_t base (void) const;
|
|
point_t away (void) const;
|
|
point_t centre (void) const;
|
|
point_t closest (point_t) const;
|
|
|
|
//---------------------------------------------------------------------
|
|
// Point and region relation queries
|
|
bool includes (point_t) const; // inclusive of borders
|
|
bool contains (point_t) const; // exclusive of borders
|
|
bool intersects (region<S,T>) const; // exclusive of borders
|
|
|
|
// Move a point to be within the region bounds
|
|
void constrain (point_t&) const;
|
|
point_t constrained (point_t) const;
|
|
|
|
// Compute binary region combinations
|
|
region intersection (region<S,T>) const;
|
|
|
|
//---------------------------------------------------------------------
|
|
region& resize (extent<S,T>);
|
|
|
|
// Compute a region `mag` units into the region
|
|
region inset (T mag);
|
|
|
|
region expanded (T mag) const;
|
|
region expanded (vector<S,T>) const;
|
|
|
|
region& expand (T mag);
|
|
region& expand (vector<S,T>);
|
|
|
|
// arithmetic operators
|
|
region operator+ (vector<S,T>) const;
|
|
region operator- (vector<S,T>) const;
|
|
|
|
// Logical comparison operators
|
|
bool operator ==(region<S,T> rhs) const;
|
|
bool operator !=(region<S,T> rhs) const
|
|
{ return !(*this == rhs); }
|
|
|
|
// Utility constants
|
|
static const region<S,T> MAX;
|
|
static const region<S,T> UNIT;
|
|
|
|
void sanity (void) const;
|
|
};
|
|
|
|
typedef region<2,size_t> region2u;
|
|
typedef region<2,intmax_t> region2i;
|
|
typedef region<2,float> region2f;
|
|
typedef region<2,double> region2d;
|
|
|
|
template <size_t S, typename T>
|
|
std::ostream& operator<< (std::ostream&, const util::region<S,T>&);
|
|
}
|
|
|
|
#include "region.ipp"
|
|
|
|
#endif
|