Vector3int32.h

/**
  @file Vector3int32.h
  
  @maintainer Morgan McGuire, matrix@brown.edu

  @created 2008-07-01
  @edited  2008-07-01
  Copyright 2000-2009, Morgan McGuire.
  All rights reserved.
 */

#ifndef VECTOR3INT32_H
#define VECTOR3INT32_H

#include "G3D/platform.h"
#include "G3D/g3dmath.h"
#include "G3D/HashTrait.h"

namespace G3D {

/**
 \ Vector3int32
 A Vector3 that packs its fields into uint32s.
 */
G3D_BEGIN_PACKED_CLASS(4)
class Vector3int32 {
private:
    // Hidden operators
    bool operator<(const Vector3int32&) const;
    bool operator>(const Vector3int32&) const;
    bool operator<=(const Vector3int32&) const;
    bool operator>=(const Vector3int32&) const;

public:
    G3D::int32              x;
    G3D::int32              y;
    G3D::int32              z;

    Vector3int32() : x(0), y(0), z(0) {}
    Vector3int32(int _x, int _y, int _z) : x(_x), y(_y), z(_z) {}
    Vector3int32(const class Vector3int16& v);
    Vector3int32(const class Vector3& v);
    Vector3int32(class BinaryInput& bi);

    void serialize(class BinaryOutput& bo) const;
    void deserialize(class BinaryInput& bi);

    inline G3D::int32& operator[] (int i) {
        debugAssert(i <= 2);
        return ((G3D::int32*)this)[i];
    }

    inline const G3D::int32& operator[] (int i) const {
        debugAssert(i <= 2);
        return ((G3D::int32*)this)[i];
    }

    inline Vector3int32 operator+(const Vector3int32& other) const {
        return Vector3int32(x + other.x, y + other.y, z + other.z);
    }

    inline Vector3int32 operator-(const Vector3int32& other) const {
        return Vector3int32(x - other.x, y - other.y, z - other.z);
    }

    inline Vector3int32 operator*(const Vector3int32& other) const {
        return Vector3int32(x * other.x, y * other.y, z * other.z);
    }

    inline Vector3int32 operator*(const int s) const {
        return Vector3int32(x * s, y * s, z * s);
    }

    inline Vector3int32& operator+=(const Vector3int32& other) {
        x += other.x;
        y += other.y;
        z += other.z;
        return *this;
    }

    inline Vector3int32& operator-=(const Vector3int32& other) {
        x -= other.x;
        y -= other.y;
        z -= other.z;
        return *this;
    }

    inline Vector3int32& operator*=(const Vector3int32& other) {
        x *= other.x;
        y *= other.y;
        z *= other.z;
        return *this;
    }

    inline bool operator== (const Vector3int32& rkVector) const {
        return ( x == rkVector.x && y == rkVector.y && z == rkVector.z );
    }

    inline bool operator!= (const Vector3int32& rkVector) const {
        return ( x != rkVector.x || y != rkVector.y || z != rkVector.z );
    }

    Vector3int32 max(const Vector3int32& v) const {
        return Vector3int32(iMax(x, v.x), iMax(y, v.y), iMax(z, v.z));
    }

    Vector3int32 min(const Vector3int32& v) const {
        return Vector3int32(iMin(x, v.x), iMin(y, v.y), iMin(z, v.z));
    }

    std::string toString() const;
}
G3D_END_PACKED_CLASS(4)

}

template <> struct HashTrait<G3D::Vector3int32> {
    static size_t hashCode(const G3D::Vector3int32& key) {
        // Mask for the top bit of a uint32
        const G3D::uint32 top = (1UL << 31);
        // Mask for the bottom 10 bits of a uint32
        const G3D::uint32 bot = 0x000003FF;
        return static_cast<size_t>(((key.x & top) | ((key.y & top) >> 1) | ((key.z & top) >> 2)) | 
                                   (((key.x & bot) << 19) ^ ((key.y & bot) << 10) ^ (key.z & bot)));
    }
};

#endif