source: code/trunk/src/external/bullet/LinearMath/btQuadWord.h @ 8895

/*
Copyright (c) 2003-2006 Gino van den Bergen / Erwin Coumans  http://continuousphysics.com/Bullet/

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, 
including commercial applications, and to alter it and redistribute it freely, 
subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/


#ifndef BT_SIMD_QUADWORD_H
#define BT_SIMD_QUADWORD_H

#include "btScalar.h"
#include "btMinMax.h"


#if defined (__CELLOS_LV2) && defined (__SPU__)
#include <altivec.h>
#endif

/**@brief The btQuadWord class is base class for btVector3 and btQuaternion. 
 * Some issues under PS3 Linux with IBM 2.1 SDK, gcc compiler prevent from using aligned quadword.
 */
#ifndef USE_LIBSPE2
ATTRIBUTE_ALIGNED16(class) btQuadWord
#else
class btQuadWord
#endif
{
protected:

#if defined (__SPU__) && defined (__CELLOS_LV2__)
        union {
                vec_float4 mVec128;
                btScalar        m_floats[4];
        };
public:
        vec_float4      get128() const
        {
                return mVec128;
        }
protected:
#else //__CELLOS_LV2__ __SPU__
        btScalar        m_floats[4];
#endif //__CELLOS_LV2__ __SPU__

        public:
  

  /**@brief Return the x value */
                SIMD_FORCE_INLINE const btScalar& getX() const { return m_floats[0]; }
  /**@brief Return the y value */
                SIMD_FORCE_INLINE const btScalar& getY() const { return m_floats[1]; }
  /**@brief Return the z value */
                SIMD_FORCE_INLINE const btScalar& getZ() const { return m_floats[2]; }
  /**@brief Set the x value */
                SIMD_FORCE_INLINE void  setX(btScalar x) { m_floats[0] = x;};
  /**@brief Set the y value */
                SIMD_FORCE_INLINE void  setY(btScalar y) { m_floats[1] = y;};
  /**@brief Set the z value */
                SIMD_FORCE_INLINE void  setZ(btScalar z) { m_floats[2] = z;};
  /**@brief Set the w value */
                SIMD_FORCE_INLINE void  setW(btScalar w) { m_floats[3] = w;};
  /**@brief Return the x value */
                SIMD_FORCE_INLINE const btScalar& x() const { return m_floats[0]; }
  /**@brief Return the y value */
                SIMD_FORCE_INLINE const btScalar& y() const { return m_floats[1]; }
  /**@brief Return the z value */
                SIMD_FORCE_INLINE const btScalar& z() const { return m_floats[2]; }
  /**@brief Return the w value */
                SIMD_FORCE_INLINE const btScalar& w() const { return m_floats[3]; }

        //SIMD_FORCE_INLINE btScalar&       operator[](int i)       { return (&m_floats[0])[i]; }      
        //SIMD_FORCE_INLINE const btScalar& operator[](int i) const { return (&m_floats[0])[i]; }
        ///operator btScalar*() replaces operator[], using implicit conversion. We added operator != and operator == to avoid pointer comparisons.
        SIMD_FORCE_INLINE       operator       btScalar *()       { return &m_floats[0]; }
        SIMD_FORCE_INLINE       operator const btScalar *() const { return &m_floats[0]; }

        SIMD_FORCE_INLINE       bool    operator==(const btQuadWord& other) const
        {
                return ((m_floats[3]==other.m_floats[3]) && (m_floats[2]==other.m_floats[2]) && (m_floats[1]==other.m_floats[1]) && (m_floats[0]==other.m_floats[0]));
        }

        SIMD_FORCE_INLINE       bool    operator!=(const btQuadWord& other) const
        {
                return !(*this == other);
        }

  /**@brief Set x,y,z and zero w 
   * @param x Value of x
   * @param y Value of y
   * @param z Value of z
   */
                SIMD_FORCE_INLINE void  setValue(const btScalar& x, const btScalar& y, const btScalar& z)
                {
                        m_floats[0]=x;
                        m_floats[1]=y;
                        m_floats[2]=z;
                        m_floats[3] = 0.f;
                }

/*              void getValue(btScalar *m) const 
                {
                        m[0] = m_floats[0];
                        m[1] = m_floats[1];
                        m[2] = m_floats[2];
                }
*/
/**@brief Set the values 
   * @param x Value of x
   * @param y Value of y
   * @param z Value of z
   * @param w Value of w
   */
                SIMD_FORCE_INLINE void  setValue(const btScalar& x, const btScalar& y, const btScalar& z,const btScalar& w)
                {
                        m_floats[0]=x;
                        m_floats[1]=y;
                        m_floats[2]=z;
                        m_floats[3]=w;
                }
  /**@brief No initialization constructor */
                SIMD_FORCE_INLINE btQuadWord()
                //      :m_floats[0](btScalar(0.)),m_floats[1](btScalar(0.)),m_floats[2](btScalar(0.)),m_floats[3](btScalar(0.))
                {
                }
 
  /**@brief Three argument constructor (zeros w)
   * @param x Value of x
   * @param y Value of y
   * @param z Value of z
   */
                SIMD_FORCE_INLINE btQuadWord(const btScalar& x, const btScalar& y, const btScalar& z)           
                {
                        m_floats[0] = x, m_floats[1] = y, m_floats[2] = z, m_floats[3] = 0.0f;
                }

/**@brief Initializing constructor
   * @param x Value of x
   * @param y Value of y
   * @param z Value of z
   * @param w Value of w
   */
                SIMD_FORCE_INLINE btQuadWord(const btScalar& x, const btScalar& y, const btScalar& z,const btScalar& w) 
                {
                        m_floats[0] = x, m_floats[1] = y, m_floats[2] = z, m_floats[3] = w;
                }

  /**@brief Set each element to the max of the current values and the values of another btQuadWord
   * @param other The other btQuadWord to compare with 
   */
                SIMD_FORCE_INLINE void  setMax(const btQuadWord& other)
                {
                        btSetMax(m_floats[0], other.m_floats[0]);
                        btSetMax(m_floats[1], other.m_floats[1]);
                        btSetMax(m_floats[2], other.m_floats[2]);
                        btSetMax(m_floats[3], other.m_floats[3]);
                }
  /**@brief Set each element to the min of the current values and the values of another btQuadWord
   * @param other The other btQuadWord to compare with 
   */
                SIMD_FORCE_INLINE void  setMin(const btQuadWord& other)
                {
                        btSetMin(m_floats[0], other.m_floats[0]);
                        btSetMin(m_floats[1], other.m_floats[1]);
                        btSetMin(m_floats[2], other.m_floats[2]);
                        btSetMin(m_floats[3], other.m_floats[3]);
                }



};

#endif //BT_SIMD_QUADWORD_H