Add Angle#+

Author: rhannequin

lib/astronoby/aberration.rb

@@ -33,12 +33,8 @@ def apply
       )
 
       Astronoby::Coordinates::Ecliptic.new(
-        latitude: Astronoby::Angle.as_degrees(
-          @coordinates.latitude.degrees + delta_latitude.degrees
-        ),
-        longitude: Astronoby::Angle.as_degrees(
-          @coordinates.longitude.degrees + delta_longitude.degrees
-        )
+        latitude: @coordinates.latitude + delta_latitude,
+        longitude: @coordinates.longitude + delta_longitude
       )
     end
   end

lib/astronoby/angle.rb

@@ -47,24 +47,30 @@ def as_dms(degree, minute, second)
       end
     end
 
+    attr_reader :value
+
+    def initialize(value)
+      @value = if value.is_a?(Integer) || value.is_a?(BigDecimal)
+        BigDecimal(value)
+      else
+        BigDecimal(value, PRECISION)
+      end
+    end
+
     def radians
-      @angle
+      @value
     end
 
     def degrees
-      @angle * PI_IN_DEGREES / PI
+      @value * PI_IN_DEGREES / PI
     end
 
     def hours
-      @angle / RADIAN_PER_HOUR
+      @value / RADIAN_PER_HOUR
     end
 
-    def initialize(angle)
-      @angle = if angle.is_a?(Integer) || angle.is_a?(BigDecimal)
-        BigDecimal(angle)
-      else
-        BigDecimal(angle, PRECISION)
-      end
+    def +(other)
+      self.class.new(@value + other.value)
     end
 
     def str(format)

lib/astronoby/bodies/sun.rb

@@ -16,7 +16,7 @@ def ecliptic_coordinates
       Coordinates::Ecliptic.new(
         latitude: Angle.zero,
         longitude: Angle.as_degrees(
-          (true_anomaly.degrees + longitude_at_perigee.degrees) % 360
+          (true_anomaly + longitude_at_perigee).degrees % 360
         )
       )
     end

lib/astronoby/refraction.rb

@@ -54,9 +54,7 @@ def refract
 
       Astronoby::Coordinates::Horizontal.new(
         azimuth: @coordinates.azimuth,
-        altitude: Astronoby::Angle.as_degrees(
-          @coordinates.altitude.degrees + refraction_angle.degrees
-        ),
+        altitude: @coordinates.altitude + refraction_angle,
         latitude: @coordinates.latitude,
         longitude: @coordinates.longitude
       )

lib/astronoby/true_obliquity.rb

@@ -10,11 +10,7 @@ def self.for_epoch(epoch)
       mean_obliquity = Astronoby::MeanObliquity.for_epoch(epoch)
       nutation = Astronoby::Nutation.for_obliquity_of_the_ecliptic(epoch: epoch)
 
-      new(
-        Astronoby::Angle.as_degrees(
-          mean_obliquity.value.degrees + nutation.degrees
-        )
-      )
+      new(mean_obliquity.value + nutation)
     end
 
     def value

spec/astronoby/angle_spec.rb

@@ -93,6 +93,17 @@
     end
   end
 
+  describe "#+" do
+    it "returns a new angle with a value of the two angles added" do
+      angle_1 = described_class.as_radians(described_class::PI)
+      angle_2 = described_class.as_degrees(45)
+
+      new_angle = angle_1 + angle_2
+
+      expect(new_angle.degrees).to eq 225
+    end
+  end
+
   describe "#str" do
     it "returns a String" do
       angle = described_class.as_degrees(180)