pmc/vector.cc
author Markus Bröker <mbroeker@largo.dyndns.tv>
Thu, 16 Apr 2009 12:49:12 +0200
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getch.c renamed to cross_getch.c committer: Markus Bröker <mbroeker@largo.homelinux.org>
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/**
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 * test/demos/pmc/vector.cc
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 * Copyright (C) 2008 Markus Broeker
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 */
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#include <cmath>
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#include <vector.h>
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#include <cstdio>
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using namespace algebra;
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Vector::Vector (int xx, int yy)
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{
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    name = "Vector";
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    x = xx;
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    y = yy;
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    mode = RAD;
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#ifdef DEBUG
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    fprintf (stderr, "New Vector: (%.3d, %.3d)\n", x, y);
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#endif
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}
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Vector::~Vector ()
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{
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#ifdef DEBUG
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    fprintf (stderr, "Bye, bye Vector: (%.3d, %.3d)\n", x, y);
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#endif
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}
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int Vector::X ()
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{
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    return x;
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}
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int Vector::Y ()
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{
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    return y;
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}
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Vector Vector::operator+ (Vector & a)
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{
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    return Vector (x + a.X (), y + a.Y ());
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}
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Vector Vector::operator- (Vector & a)
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{
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    return Vector (x - a.X (), y - a.Y ());
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}
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double Vector::abs ()
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{
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    return (std::sqrt (x * x + y * y));
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}
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void Vector::vector ()
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{
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    fprintf (stderr, "(%.3d, %.3d)", x, y);
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}
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double Vector::angle (Vector & v)
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{
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    if (mode == DEG)
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        return ((180.0 / M_PI) * std::acos ((v.X () * X () + v.Y () * Y ()) / (abs () * v.abs ())));
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    return (std::acos ((v.X () * X () + v.Y () * Y ()) / (abs () * v.abs ())));
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}
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void Vector::setMode (Mode m)
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{
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    mode = m;
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}