vect2.cpp

//
// Copyright (c) Singular Inversions Inc. 1998.
//
// File:        vect2.cpp
// Description: FR2Vect2TC class definitions
// Authors:     Andrew Beatty
// Created:     Aug 11, 1998
//
 
#include "stdafx.h"
 
#include "vect2.hpp"
 
namespace Fg {
 
// Returns the vector rotated counter-clockwise around the Z axis (rhr)
// by theta radians. Since we want to define it for float and double but
// not for int, we must define it twice, once for each instantiation:
//
template<>
const FR2Vect2DC       FR2Vect2DC::rotate(
 
        double          theta)
        const
{
    double      cosine=cos(theta),
                sine=sin(theta);
    FR2Vect2TC   retval;
 
    retval.x1 = x1 * cosine - x2 * sine;
    retval.x2 = x2 * cosine + x1 * sine;
 
    return(retval);
}
 
template<>
const FR2Vect2FC       FR2Vect2FC::rotate(
 
        float           theta) 
        const
{
    float               cosine = (float)cos(theta),
                sine   = (float)sin(theta);
    FR2Vect2TC   retval;
 
    retval.x1 = x1 * cosine - x2 * sine;
    retval.x2 = x2 * cosine + x1 * sine;
 
    return(retval);
}
 
//***********************************************************************
//                      Stream Operators
//***********************************************************************
 
std::ostream& operator<<(std::ostream& s,FR2Vect2IC vec)
{
    return s << "(" << vec.x1 << "," << vec.x2 << ")";
}
 
std::ostream& operator<<(std::ostream& s,FR2Vect2FC vec)
{
    std::ios::fmtflags oldFlag = s.setf(std::ios::fixed|std::ios::showpos|std::ios::right);
        std::streamsize oldPrec = s.precision(4);
    s << "(" << vec.x1 << "," << vec.x2 << ")";
    s.setf(oldFlag);
    s.precision(oldPrec);
    return s;
}
 
std::ostream& operator<<(std::ostream& s,FR2Vect2DC vec)
{
    std::ios::fmtflags oldFlag = s.setf(std::ios::fixed|std::ios::showpos|std::ios::right);
    std::streamsize  oldPrec = s.precision(4);
    s << "(" << vec.x1 << "," << vec.x2 << ")";
    s.setf(oldFlag);
    s.precision(oldPrec);
    return s;
}
 
}