VTFMathlib.h

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/*
 * VTFLib
 * Copyright (C) 2005-2010 Neil Jedrzejewski & Ryan Gregg

 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later
 * version.
 */

// ============================================================
// NOTE: This file is commented for compatibility with Doxygen.
// ============================================================
#ifndef VTFLIB_VTFMATHLIB_H
#define VTFLIB_VTFMATHLIB_H

#include "stdafx.h"

// Defines for data alignment
//---------------------------
#define CACHE_LINE  16                                  

#ifdef __WINDOWS__
#   define CACHE_ALIGN __declspec(align(CACHE_LINE))    
#else
#   define CACHE_ALIGN __attribute__((aligned (CACHE_LINE)))
#endif

// Macros
//-------
#define drand48() (((vlSingle) rand())/((vlSingle) RAND_MAX))       

// Vector class
//-------------

class Vector
{
    public:

        vlSingle x;     
        vlSingle y;     
        vlSingle z;     
    
    inline void Init(vlSingle vX, vlSingle vY, vlSingle vZ)
    {
        x = vX;
        y = vY;
        z = vZ;
    }

    inline void Init(void)
    {
        x = 0.0f;
        y = 0.0f;
        z = 0.0f;
    }
};

// VectorAligned class
//--------------------

class CACHE_ALIGN VectorAligned
{
    public:
        
        vlSingle x;     
        vlSingle y;     
        vlSingle z;     

        inline VectorAligned(vlSingle vX, vlSingle vY, vlSingle vZ) 
        {
            x = vX;
            y = vY;
            z = vZ;
        }

        inline VectorAligned(void)
        {
            x = 0.0f;
            y = 0.0f;
            z = 0.0f;
        }
};

void VecAdd(Vector *a, Vector *b, Vector *sum);         
void VecSub(Vector *a, Vector *b, Vector *diff);        
void VecScale(Vector *v, vlSingle scale);               
vlSingle VecDot(Vector *u, Vector *v);                  
void VecReflect(Vector *axis, Vector *v, Vector *r);    
vlInt Intersect(Vector *v);                             

#endif //VTF_MATHLIB