1 files changed, 126 insertions, 0 deletions
diff --git a/src/mbgl/util/vec.hpp b/src/mbgl/util/vec.hpp
new file mode 100644
index 0000000000..40d540fca4
--- /dev/null
+++ b/src/mbgl/util/vec.hpp
@@ -0,0 +1,126 @@
+#ifndef MBGL_UTIL_VEC
+#define MBGL_UTIL_VEC
+
+#include <limits>
+#include <type_traits>
+#include <cmath>
+#include <cstdint>
+#include <array>
+
+namespace mbgl {
+
+template <typename T = double>
+struct vec2 {
+    struct null {};
+    typedef T Type;
+
+    T x, y;
+
+    inline vec2() = default;
+
+    template<typename U = T, typename std::enable_if<std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    inline vec2(null) : x(std::numeric_limits<T>::quiet_NaN()), y(std::numeric_limits<T>::quiet_NaN()) {}
+
+    template<typename U = T, typename std::enable_if<!std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    inline vec2(null) : x(std::numeric_limits<T>::min()), y(std::numeric_limits<T>::min()) {}
+
+    inline vec2(const vec2& o) = default;
+
+    template<typename U>
+    inline vec2(const U& u) : x(u.x), y(u.y) {}
+
+    inline vec2(T x_, T y_) : x(x_), y(y_) {}
+
+    inline bool operator==(const vec2& rhs) const {
+        return x == rhs.x && y == rhs.y;
+    }
+
+    template <typename O>
+    inline typename std::enable_if<std::is_arithmetic<O>::value, vec2>::type
+    operator*(O o) const {
+        return {x * o, y * o};
+    }
+
+    inline void operator*=(T o) {
+        x *= o;
+        y *= o;
+    }
+
+    template <typename O>
+    inline typename std::enable_if<std::is_arithmetic<O>::value, vec2>::type
+    operator/(O o) const {
+        return {x / o, y / o};
+    }
+
+    inline void operator/=(T o) {
+        x /= o;
+        y /= o;
+    }
+
+    inline vec2<T> operator *(const std::array<float, 16>& matrix) {
+        return { x * matrix[0] + y * matrix[4] + matrix[12], x * matrix[1] + y * matrix[5] + matrix[13] };
+    }
+
+    template <typename O>
+    inline typename std::enable_if<std::is_arithmetic<O>::value, vec2>::type
+    operator-(O o) const {
+        return {x - o, y - o};
+    }
+
+    template <typename O>
+    inline typename std::enable_if<!std::is_arithmetic<O>::value, vec2>::type
+    operator-(const O &o) const {
+        return vec2<T>(x - o.x, y - o.y);
+    }
+
+    template <typename O>
+    inline typename std::enable_if<!std::is_arithmetic<O>::value, vec2>::type
+    operator+(const O &o) const {
+        return vec2<T>(x + o.x, y + o.y);
+    }
+
+    template <typename M>
+    inline vec2 matMul(const M &m) const {
+        return {m[0] * x + m[1] * y, m[2] * x + m[3] * y};
+    }
+
+    template<typename U = T, typename std::enable_if<std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    explicit operator bool() const {
+        return !std::isnan(x) && !std::isnan(y);
+    }
+
+    template<typename U = T, typename std::enable_if<!std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    explicit operator bool() const {
+        return x != std::numeric_limits<T>::min() && y != std::numeric_limits<T>::min();
+    }
+};
+
+template <typename T = double>
+struct vec4 {
+    T x, y, z, w;
+
+    inline vec4() = default;
+    inline vec4(const vec4& o) : x(o.x), y(o.y), z(o.z), w(o.w) {}
+    inline vec4(T x_, T y_, T z_, T w_) : x(x_), y(y_), z(z_), w(w_) {}
+    inline bool operator==(const vec4& rhs) const {
+        return x == rhs.x && y == rhs.y && z == rhs.z && w == rhs.w;
+    }
+
+    template<typename U = T, typename std::enable_if<std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    explicit operator bool() const {
+        return !std::isnan(x) && !std::isnan(y) && !std::isnan(z) && !std::isnan(w);
+    }
+
+    template<typename U = T, typename std::enable_if<!std::numeric_limits<U>::has_quiet_NaN, int>::type = 0>
+    explicit operator bool() const {
+        return x != std::numeric_limits<T>::min()
+            && y != std::numeric_limits<T>::min()
+            && z != std::numeric_limits<T>::min()
+            && w != std::numeric_limits<T>::min();
+    }
+};
+
+
+} // namespace mbgl
+
+#endif // MBGL_UTIL_VEC