Version 4.1

src/Sphere.cpp

@@ -0,0 +1,104 @@
+/***************************************************/
+/*! \class Sphere
+    \brief STK sphere class.
+
+    This class implements a spherical ball with
+    radius, mass, position, and velocity parameters.
+
+    by Perry R. Cook, 1995 - 2002.
+*/
+/***************************************************/
+
+#include "Sphere.h"
+#include <stdio.h>
+#include <math.h>
+
+Sphere::Sphere(double initRadius)
+{
+  myRadius = initRadius;
+  myMass = 1.0;
+  myPosition = new Vector3D(0, 0, 0);
+  myVelocity = new Vector3D(0, 0, 0);
+};
+
+Sphere::~Sphere()
+{
+  delete myPosition;
+  delete myVelocity;
+}
+
+void Sphere::setPosition(double anX, double aY, double aZ)
+{
+  myPosition->setXYZ(anX, aY, aZ);
+};
+
+void Sphere::setVelocity(double anX, double aY, double aZ)
+{
+  myVelocity->setXYZ(anX, aY, aZ);
+};
+
+void Sphere::setRadius(double aRadius)
+{
+  myRadius = aRadius;
+};
+
+void Sphere::setMass(double aMass)
+{
+  myMass = aMass;
+};
+
+Vector3D* Sphere::getPosition()
+{
+  return myPosition;
+};
+
+Vector3D* Sphere::getRelativePosition(Vector3D* aPosition)
+{
+  workingVector.setXYZ(aPosition->getX() - myPosition->getX(),
+                       aPosition->getY() - myPosition->getY(),  
+                       aPosition->getZ() - myPosition->getZ());
+  return &workingVector;
+};
+
+double Sphere::getVelocity(Vector3D* aVelocity)
+{
+  aVelocity->setXYZ(myVelocity->getX(), myVelocity->getY(), myVelocity->getZ());
+  return myVelocity->getLength();
+};
+
+double Sphere::isInside(Vector3D *aPosition)
+{
+  // Return directed distance from aPosition to spherical boundary ( <
+  // 0 if inside).
+  double distance;
+  Vector3D *tempVector;
+
+  tempVector = this->getRelativePosition(aPosition);
+  distance = tempVector->getLength();
+  return distance - myRadius;
+};
+
+double Sphere::getRadius()
+{
+  return myRadius;
+};
+
+double Sphere::getMass()
+{
+  return myMass;
+};
+
+void Sphere::addVelocity(double anX, double aY, double aZ)
+{
+  myVelocity->setX(myVelocity->getX() + anX);
+  myVelocity->setY(myVelocity->getY() + aY);
+  myVelocity->setZ(myVelocity->getZ() + aZ);
+}
+
+void Sphere::tick(double timeIncrement)
+{
+  myPosition->setX(myPosition->getX() + (timeIncrement * myVelocity->getX()));
+  myPosition->setY(myPosition->getY() + (timeIncrement * myVelocity->getY()));
+  myPosition->setZ(myPosition->getZ() + (timeIncrement * myVelocity->getZ()));
+};
+