float2.cpp

//
//  float2.cpp
//  Homework 2: Curves
//
//  Created by mahina kaholokula on 10/16/14.
//  Copyright (c) 2014 mahina kaholokula. All rights reserved.
//

#include <math.h>
#include <stdlib.h>

class float2
{
public:
    float x;
    float y;
    
    float2()
    {
        x = 0.0f;
        y = 0.0f;
    }
    
    
    float2(float x, float y):x(x),y(y){}
    
    float2 operator-() const
    {
        return float2(-x, -y);
    }
    
    
    float2 operator+(const float2& addOperand) const
    {
        return float2(x + addOperand.x, y + addOperand.y);
    }
    
    float2 operator-(const float2& operand) const
    {
        return float2(x - operand.x, y - operand.y);
    }
    
    float2 operator*(const float2& operand) const
    {
        return float2(x * operand.x, y * operand.y);
    }
    
    float2 operator*(float operand) const
    {
        return float2(x * operand, y * operand);
    }
    
    float2 operator/(float operand) const
    {
        return float2(x / operand, y / operand);
    }
    
    float2 operator-=(const float2& a)
    {
        x -= a.x;
        y -= a.y;
        return *this;
    }
    
    float2 operator+=(const float2& a)
    {
        x += a.x;
        y += a.y;
        return *this;
    }
    
    float2 operator*=(const float2& a)
    {
        x *= a.x;
        y *= a.y;
        return *this;
    }
    
    float2 operator*=(float a)
    {
        x *= a;
        y *= a;
        return *this;
    }
    
    float norm()
    {
        return sqrtf(x*x+y*y);
    }
    
    float norm2()
    {
        return x*x+y*y;
    }
    
    float2 normalize()
    {
        float oneOverLength = 1.0f / norm();
        x *= oneOverLength;
        y *= oneOverLength;
        return *this;
    }
    
    //between -1 and 1
    static float2 random()
    {
        return float2(
                      ((float)rand() / RAND_MAX) * 2 - 1,
                      ((float)rand() / RAND_MAX) * 2 - 1);
    }
};