Subversion Repositories wf3d

//=======================================================================

// Project Monophony

//   Wire-Frame 3D Graphics Accelerator IP Core

//

// File:

//   mp_vector4.h

//

// Abstract:

//   vector4 implementation

//

// Author:

//   Kenji Ishimaru (info.info.wf3d@gmail.com)

//

//======================================================================

//

// Copyright (c) 2015, Kenji Ishimaru

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//

//  -Redistributions of source code must retain the above copyright notice,

//   this list of conditions and the following disclaimer.

//  -Redistributions in binary form must reproduce the above copyright notice,

//   this list of conditions and the following disclaimer in the documentation

//   and/or other materials provided with the distribution.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,

// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Revision History

#include <math.h>

#include "mp_vector4.h"

void mp_vector4_init(mp_vector4 *dst) {

    dst->x = 0.0;

    dst->y = 0.0;

    dst->z = 0.0;

    dst->w = 0.0;

}

void mp_vector4_set0(mp_vector4 *dst, float lx,  float ly,  float lz) {

    dst->x = lx;

    dst->y = ly;

    dst->z = lz;

    dst->w = 1.0;

}

void mp_vector4_set1(mp_vector4 *dst, float lx,  float ly,

                                      float lz,  float lw) {

    dst->x = lx;

    dst->y = ly;

    dst->z = lz;

    dst->w = lw;

}

void mp_vector4_set2(mp_vector4 *dst, mp_vector4 *v) {

    dst->x = v->x;

    dst->y = v->y;

    dst->z = v->z;

    dst->w = v->w;

}

void mp_vector4_normalize(mp_vector4 *dst) {

    float t = dst->x*dst->x + dst->y*dst->y + dst->z*dst->z + dst->w*dst->w;

    t = sqrt(t);

    t = 1.0F/t;

    dst->x = dst->x * t;

    dst->y = dst->y * t;

    dst->z = dst->z * t;

    dst->w = dst->w * t;

}