add AngleDistance

include/units/Angle.hpp

@@ -68,6 +68,29 @@ class CAngle {
         constexpr CAngle(double value) : value(value) {}
 };
 
+/**
+ * @brief Angle Distance class
+ *
+ * yet another helper class to manage the compass angle fiasco (it's getting nuked on May 15 2025)
+ *
+ * consider the following:
+ * Angle exitRange1 = 0_cDeg;
+ * Angle exitRange2 = 0_stDeg;
+ *
+ * It is expected that exitRange1 and exitRange2 is equal to each other.
+ * However, this is not the case. 0_cDeg gets converted to 90_stDeg
+ * implicitly. So, yet another helper class is necessary (hooray)
+ *
+ */
+class AngleDistance : public Angle {
+    public:
+        explicit constexpr AngleDistance(double value) : Angle(fabs(value)) {}
+
+        constexpr AngleDistance(Angle value) : Angle(units::abs(value)) {}
+
+        constexpr AngleDistance(CAngle value) : Angle(units::abs(Angle(value) - Angle(M_PI_2))) {}
+};
+
 constexpr bool operator==(Angle lhs, CAngle rhs) { return lhs == Angle(rhs); }
 
 constexpr Angle rad = Angle(1.0);

src/main.cpp

@@ -45,14 +45,21 @@ void initialize() {
     units::Vector2D<Number> v2e = units::V2Position(2_in, 2_in) / 2_in;
 }
 
-void angleTests() {
+constexpr void angleTests() {
     static_assert(+15_cDeg == 75_stDeg);
     static_assert(to_stDeg(-+15_cDeg) == to_stDeg(105_stDeg));
     static_assert(r2i(to_stDeg(30_cDeg)) == r2i(to_stDeg(60_stDeg)));
     static_assert(r2i(to_stDeg(+0_cDeg)) == r2i(to_stDeg(90_stDeg)));
     Angle a = 2_cDeg;
 }
 
+constexpr void angleDistanceTests() {
+    // static_assert(r2i(to_stDeg(AngleDistance(-15_cDeg))) == r2i(to_stDeg(AngleDistance(+15_stDeg))));
+    Angle a = 2_stDeg + AngleDistance(15_stDeg);
+    Angle b = AngleDistance(15_stDeg) + 2_stDeg;
+    Angle c = 2_stDeg + AngleDistance(15_cDeg);
+}
+
 constexpr Number numAssignmentTests() {
     Number n = 1_num; // 1
     n += 2; // 3
@@ -73,7 +80,6 @@ constexpr double doubleAssignmentTests() {
     return d;
 }
 
-
 void numberOperatorTests() {
     static_assert(1_num + 2 == 3);
     static_assert(1 + 2_num <= 3);