RLoc.cpp

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/*  Project Starshatter 4.5
        Destroyer Studios LLC
        Copyright © 1997-2004. All Rights Reserved.

        SUBSYSTEM:    Stars.exe
        FILE:         RLoc.cpp
        AUTHOR:       John DiCamillo


        OVERVIEW
        ========
        Navigation Point class implementation
*/

#include "MemDebug.h"
#include "RLoc.h"
#include "Random.h"

// +----------------------------------------------------------------------+

RLoc::RLoc()
: rloc(0), dex(0), dex_var(5.0e3f), az(0), az_var(3.1415f), el(0), el_var(0.1f)
{ }

RLoc::RLoc(const Point& l, double d, double dv)
: loc(l), base_loc(l), rloc(0), dex((float) d), dex_var((float) dv), 
az(0), az_var(3.1415f), el(0), el_var(0.1f)
{ }

RLoc::RLoc(RLoc* l, double d, double dv)
: rloc(l), dex((float) d), dex_var((float) dv), 
az(0), az_var(3.1415f), el(0), el_var(0.1f)
{ }

RLoc::RLoc(const RLoc& r)
: loc(r.loc), base_loc(r.base_loc), rloc(r.rloc), 
dex(r.dex), dex_var(r.dex_var),
az(r.az),   az_var(r.az_var),
el(r.el),   el_var(r.el_var)
{ }

RLoc::~RLoc()
{ }

// +----------------------------------------------------------------------+

const Point&
RLoc::Location()
{
        if (rloc || dex > 0) Resolve();
        return loc;
}

// +----------------------------------------------------------------------+

void
RLoc::Resolve()
{
        if (rloc) {
                base_loc = rloc->Location();
                rloc = 0;
        }

        if (dex > 0) {
                double d = dex + Random(-dex_var, dex_var);
                double a = az  + Random(-az_var,  az_var);
                double e = el  + Random(-el_var,  el_var);

                Point  p = Point(d *  sin(a),
                d * -cos(a),
                d *  sin(e));

                loc = base_loc + p;
                dex = 0;
        }
        else {
                loc = base_loc;
        }
}

// +----------------------------------------------------------------------+

void
RLoc::SetBaseLocation(const Point& l)
{
        base_loc = l;
        loc      = l;
}