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https://github.com/thestk/stk
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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/***************************************************/
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/*! \class Sphere
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\brief STK sphere class.
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This class implements a spherical ball with
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radius, mass, position, and velocity parameters.
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by Perry R. Cook, 1995 - 2010.
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*/
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/***************************************************/
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#include "Sphere.h"
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#include <cmath>
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namespace stk {
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Vector3D* Sphere::getRelativePosition( Vector3D* position )
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{
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workingVector_.setXYZ(position->getX() - position_.getX(),
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position->getY() - position_.getY(),
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position->getZ() - position_.getZ());
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return &workingVector_;
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};
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StkFloat Sphere::getVelocity( Vector3D* velocity )
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{
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velocity->setXYZ( velocity_.getX(), velocity_.getY(), velocity_.getZ() );
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return velocity_.getLength();
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};
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StkFloat Sphere::isInside( Vector3D *position )
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{
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// Return directed distance from aPosition to spherical boundary ( <
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// 0 if inside).
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StkFloat distance;
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Vector3D *tempVector;
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tempVector = this->getRelativePosition( position );
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distance = tempVector->getLength();
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return distance - radius_;
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};
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void Sphere::addVelocity(StkFloat x, StkFloat y, StkFloat z)
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{
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velocity_.setX(velocity_.getX() + x);
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velocity_.setY(velocity_.getY() + y);
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velocity_.setZ(velocity_.getZ() + z);
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}
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} // stk namespace
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