2018-soft-3d-renderer/include/point.h

#ifndef POINT_H

#include "vec.h"


// STRUCTURE
struct Point
{
    inline Point(void) : x(0), y(0), z(0), w(1) {}
    inline Point(float x, float y, float z) : x(x), y(y), z(z), w(1) {}

    union
    {
        float e[4];

        struct
        {
            float x, y, z, w;
        };
    };
};


// OPERATORS
// p / f
inline Point operator/(Point p, float f)
{
    Point result;

    float inverse = 1.0f / f;

    result.x = p.x * inverse;
    result.y = p.y * inverse;
    result.z = p.z * inverse;

    return result;
}

// v /= f
inline Point &operator/=(Point &p, float f)
{
    p = p / f;

    return p;
}

// p1 - p2
inline Vector operator-(Point p1, Point p2)
{
    Vector result;

    result.x = p1.x - p2.x;
    result.y = p1.y - p2.y;
    result.z = p1.z - p2.z;

    return result;
}

// -p
inline Point operator-(Point p)
{
    Point result;

    result.x = -p.x;
    result.y = -p.y;
    result.z = -p.z;

    return result;
}


#define POINT_H
#endif