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

// Project Monophony

//   Wire-Frame 3D Graphics Accelerator IP Core

//

// File:

//   mp_vector3.c

//

// Abstract:

//   vector3 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_vector3.h"

void mp_vector3_mp_vector3(mp_vector3 *dst) {

    dst->x = 0.0;

    dst->y = 0.0;

    dst->z = 0.0;

}

void mp_vector3_set0(mp_vector3 *dst, float lx,  float ly,  float lz) {

    dst->x = lx;

    dst->y = ly;

    dst->z = lz;

}

void mp_vector3_set2(mp_vector3 *dst, mp_vector3 *v) {

    dst->x = v->x;

    dst->y = v->y;

    dst->z = v->z;

}

int mp_vector3_is_zero_vector(mp_vector3 *dst) {

    if (dst->x < 0 &&

        dst->y < 0 &&

        dst->z < 0) return 1;

    return 0;

}

float mp_vector3_size(mp_vector3 *dst) {

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

    t = sqrt(t);

    return t;

}

float mp_vector3_size2(mp_vector3 *dst) {

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

    return t;

}

void mp_vector3_normalize(mp_vector3 *dst) {

    float t = mp_vector3_size(dst);

    if (t <= 0) {

        dst->x = 0;

        dst->y = 0;

        dst->z = 0;

    } else {

      t = 1.0F/t;

      dst->x *= t;

      dst->y *= t;

      dst->z *= t;

    }

}

void mp_vector3_cross_product0(mp_vector3 *dst, mp_vector3 *a,  mp_vector3 *b){

    dst->x = a->y*b->z - b->y*a->z;

    dst->y = a->z*b->x - b->z*a->x;

    dst->z = a->x*b->y - b->x*a->y;

}

void mp_vector3_cross_product1(mp_vector3 *dst, mp_vector3 *b) {

    dst->x = dst->y*b->z - b->y*dst->z;

    dst->y = dst->z*b->x - b->z*dst->x;

    dst->z = dst->x*b->y - b->x*dst->y;

}

float mp_vector3_inner_product0(mp_vector3 *dst, mp_vector3 *a) {

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

    return t;

}

float mp_vector3_inner_product1(float x,  float y,  float z){

    float t = x*x + y*y + z*z;

    return t;

}

float mp_vector3_inner_product3( mp_vector3 *a,  mp_vector3 *b) {

    float t = a->x*b->x+a->y*b->y+a->z*b->z;

    return t;

}

void mp_vector3_scale(mp_vector3 *dst, float t) {

    dst->x *= t;

    dst->y *= t;

    dst->z *= t;

}

void mp_vector3_add0(mp_vector3 *dst, mp_vector3 *v) {

    dst->x += v->x;

    dst->y += v->y;

    dst->z += v->z;

}

void mp_vector3_subtract0(mp_vector3 *dst, mp_vector3 *v) {

    dst->x -= v->x;

    dst->y -= v->y;

    dst->z -= v->z;

}

void mp_vector3_assign0(mp_vector3 *dst, mp_vector3 *v) {

    dst->x = v->x;

    dst->y = v->y;

    dst->z = v->z;

}