Initial release

deps_src/libnest2d/include/libnest2d/common.hpp

@@ -0,0 +1,232 @@
+#ifndef LIBNEST2D_CONFIG_HPP
+#define LIBNEST2D_CONFIG_HPP
+
+#ifndef NDEBUG
+#include <iostream>
+#endif
+
+#include <stdexcept>
+#include <string>
+#include <cmath>
+#include <type_traits>
+#include <limits>
+
+#define MAX_NUM_PLATES 36
+
+#if defined(_MSC_VER) &&  _MSC_VER <= 1800 || __cplusplus < 201103L
+    #define BP2D_NOEXCEPT
+    #define BP2D_CONSTEXPR
+    #define BP2D_COMPILER_MSVC12
+#elif __cplusplus >= 201103L
+    #define BP2D_NOEXCEPT noexcept
+    #define BP2D_CONSTEXPR constexpr
+#endif
+
+/*
+ * Debugging output dout and derr definition
+ */
+//#ifndef NDEBUG
+//#   define dout std::cout
+//#   define derr std::cerr
+//#else
+//#   define dout 0 && std::cout
+//#   define derr 0 && std::cerr
+//#endif
+
+namespace libnest2d {
+
+struct DOut {
+#ifndef NDEBUG
+    std::ostream& out = std::cout;
+#endif
+};
+
+struct DErr {
+#ifndef NDEBUG
+    std::ostream& out = std::cerr;
+#endif
+};
+
+template<class T>
+inline DOut&& operator<<( DOut&& out, T&& d) {
+#ifndef NDEBUG
+    out.out << d;
+#endif
+    return std::move(out);
+}
+
+template<class T>
+inline DErr&& operator<<( DErr&& out, T&& d) {
+#ifndef NDEBUG
+    out.out << d;
+#endif
+    return std::move(out);
+}
+inline DOut dout() { return DOut(); }
+inline DErr derr() { return DErr(); }
+
+template< class T >
+struct remove_cvref {
+    using type = typename std::remove_cv<
+        typename std::remove_reference<T>::type>::type;
+};
+
+template< class T >
+using remove_cvref_t = typename remove_cvref<T>::type;
+
+template< class T >
+using remove_ref_t = typename std::remove_reference<T>::type;
+
+template<bool B, class T>
+using enable_if_t = typename std::enable_if<B, T>::type;
+
+template<class F, class...Args>
+struct invoke_result {
+    using type = typename std::result_of<F(Args...)>::type;
+};
+
+template<class F, class...Args>
+using invoke_result_t = typename invoke_result<F, Args...>::type;
+
+/**
+ * A useful little tool for triggering static_assert error messages e.g. when
+ * a mandatory template specialization (implementation) is missing.
+ *
+ * \tparam T A template argument that may come from and outer template method.
+ */
+template<class T> struct always_false { enum { value = false }; };
+
+const double BP2D_CONSTEXPR Pi = 3.141592653589793238463; // 2*std::acos(0);
+const double BP2D_CONSTEXPR Pi_2 = 2*Pi;
+
+/**
+ * @brief Only for the Radian and Degrees classes to behave as doubles.
+ */
+class Double {
+protected:
+  double val_;
+public:
+  Double(): val_(double{}) { }
+  Double(double d) : val_(d) { }
+
+  operator double() const BP2D_NOEXCEPT { return val_; }
+  operator double&() BP2D_NOEXCEPT { return val_; }
+};
+
+class Degrees;
+
+/**
+ * @brief Data type representing radians. It supports conversion to degrees.
+ */
+class Radians: public Double {
+    mutable double sin_ = std::nan(""), cos_ = std::nan("");
+public:
+    Radians(double rads = Double() ): Double(rads) {}
+    inline Radians(const Degrees& degs);
+
+    inline operator Degrees();
+    inline double toDegrees();
+
+    inline double sin() const {
+        if(std::isnan(sin_)) {
+            cos_ = std::cos(val_);
+            sin_ = std::sin(val_);
+        }
+        return sin_;
+    }
+
+    inline double cos() const {
+        if(std::isnan(cos_)) {
+            cos_ = std::cos(val_);
+            sin_ = std::sin(val_);
+        }
+        return cos_;
+    }
+};
+
+/**
+ * @brief Data type representing degrees. It supports conversion to radians.
+ */
+class Degrees: public Double {
+public:
+    Degrees(double deg = Double()): Double(deg) {}
+    Degrees(const Radians& rads): Double( rads * 180/Pi ) {}
+    inline double toRadians() { return Radians(*this);}
+};
+
+inline bool operator==(const Degrees& deg, const Radians& rads) {
+    Degrees deg2 = rads;
+    auto diff = std::abs(deg - deg2);
+    return diff < 0.0001;
+}
+
+inline bool operator==(const Radians& rads, const Degrees& deg) {
+    return deg == rads;
+}
+
+inline Radians::operator Degrees() { return *this * 180/Pi; }
+
+inline Radians::Radians(const Degrees &degs): Double( degs * Pi/180) {}
+
+inline double Radians::toDegrees() { return operator Degrees(); }
+
+enum class GeomErr : std::size_t {
+    OFFSET,
+    MERGE,
+    NFP
+};
+
+const std::string ERROR_STR[] = {
+    "Offsetting could not be done! An invalid geometry may have been added.",
+    "Error while merging geometries!",
+    "No fit polygon cannot be calculated."
+};
+
+class GeometryException: public std::exception {
+
+    virtual const std::string& errorstr(GeomErr errcode) const BP2D_NOEXCEPT {
+        return ERROR_STR[static_cast<std::size_t>(errcode)];
+    }
+
+    GeomErr errcode_;
+public:
+
+    GeometryException(GeomErr code): errcode_(code) {}
+
+    GeomErr errcode() const { return errcode_; }
+
+    const char * what() const BP2D_NOEXCEPT override {
+        return errorstr(errcode_).c_str();
+    }
+};
+
+struct ScalarTag {};
+struct BigIntTag {};
+struct RationalTag {};
+
+template<class T> struct _NumTag { 
+    using Type = 
+        enable_if_t<std::is_arithmetic<T>::value, ScalarTag>; 
+};
+
+template<class T> using NumTag = typename _NumTag<remove_cvref_t<T>>::Type;
+
+/// A local version for abs that is garanteed to work with libnest2d types
+template <class T> inline T abs(const T& v, ScalarTag) 
+{ 
+    return std::abs(v); 
+}
+
+template<class T> inline T abs(const T& v) { return abs(v, NumTag<T>()); }
+
+template<class T2, class T1> inline T2 cast(const T1& v, ScalarTag, ScalarTag) 
+{
+    return static_cast<T2>(v);    
+}
+
+template<class T2, class T1> inline T2 cast(const T1& v) { 
+    return cast<T2, T1>(v, NumTag<T1>(), NumTag<T2>());
+}
+
+}
+#endif // LIBNEST2D_CONFIG_HPP