orbital period and acceleration v1

OrbitalSimulator · May 20, 2021 · fddf4d4 · fddf4d4
1 parent da71ca4
commit fddf4d4
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Showing 2 changed files with 12 additions and 5 deletions.
diff --git a/app/src/main/java/src/univ/CelestialBody.java b/app/src/main/java/src/univ/CelestialBody.java
@@ -87,11 +87,20 @@ public double orbitalVelocity(double r2)
 		return Math.sqrt((G*mass)/r);
 
 	}
-	public double acceleration()
+	/**
+	 * Calculates the gravitational acceleration of a planet
+	 * @return acceleration in m/s^2
+	 */
+	public double planetaryGravitationalAcceleration()
 	{
 		double G = 6.67408e-11;	
 		return (G*mass)/(radius*radius);
 	}
+	/**
+	 * Calculates the orbital period of a planet
+	 * @param r2 The height of the orbit above the planet's surface (meters)
+	 * @return time (seconds) it takes for an object to orbit once around another object
+	 */
 	public double orbitalPeriod(double r2)
 	{
 		double G = 6.67408e-11;

diff --git a/app/src/test/java/src/test/TestCelestialBody.java b/app/src/test/java/src/test/TestCelestialBody.java
@@ -136,15 +136,14 @@ void testOrbitalVelocity()
 	}
 	/* Tests that the acceleration() method calculates the gravitational acceleration of the earth correctly*/
 	@Test
-	void testAcceleration()
+	void testPlanetaryGravitationalAcceleration()
 	{
 		/*Earth's gravitational acceleration*/
 		double exactAcceleration = 9.8;
 
 		/*Test*/
 		CelestialBody earth = new CelestialBody(new Vector3d(), new Vector3d(), 5.97*Math.pow(10,24), 6378000, "Earth", "", "", LocalDateTime.of(d1, t1));
-		double testAcceleration = earth.acceleration();
-		System.out.println(testAcceleration);
+		double testAcceleration = earth.planetaryGravitationalAcceleration();
 		assertTrue(inRange(exactAcceleration, testAcceleration, epsilon));
 	}
 	/* Tests that the orbitalPeriodMethod() method calculates the orbital period of the earth around the sun correctly*/
@@ -162,7 +161,6 @@ void testOrbitalPeriod()
 
 		/*Test*/
 		double testOrbitalPeriod = sun.orbitalPeriod(r2);
-		System.out.println(testOrbitalPeriod);
 		assertTrue(inRange(exactOrbitalPeriod, testOrbitalPeriod, epsilon));
 	}
 	/**