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/******************************************************************************
*
* Copyright (C) 2012 Asahi Kasei Microdevices Corporation, Japan
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
#include "AKFS_VNorm.h"
#include "AKFS_Device.h"
/*!
*/
int16 AKFS_VbNorm(
const int16 ndata, /*!< Size of raw vector buffer */
const AKFVEC vdata[], /*!< Raw vector buffer */
const int16 nbuf, /*!< Size of data to be buffered */
const AKFVEC* o, /*!< Offset */
const AKFVEC* s, /*!< Sensitivity */
const AKFLOAT tgt, /*!< Target sensitivity */
const int16 nvec, /*!< Size of normalized vector buffer */
AKFVEC vvec[] /*!< Normalized vector buffer */
)
{
int i;
/* size check */
if ((ndata <= 0) || (nvec <= 0) || (nbuf <= 0)) {
return AKFS_ERROR;
}
/* dependency check */
if ((nbuf < 1) || (ndata < nbuf) || (nvec < nbuf)) {
return AKFS_ERROR;
}
/* sensitivity check */
if ((s->u.x <= AKFS_EPSILON) ||
(s->u.y <= AKFS_EPSILON) ||
(s->u.z <= AKFS_EPSILON) ||
(tgt <= 0)) {
return AKFS_ERROR;
}
/* calculate and store data to buffer */
if (AKFS_BufShift(nvec, nbuf, vvec) != AKFS_SUCCESS) {
return AKFS_ERROR;
}
for (i=0; i<nbuf; i++) {
vvec[i].u.x = ((vdata[i].u.x - o->u.x) / (s->u.x) * (AKFLOAT)tgt);
vvec[i].u.y = ((vdata[i].u.y - o->u.y) / (s->u.y) * (AKFLOAT)tgt);
vvec[i].u.z = ((vdata[i].u.z - o->u.z) / (s->u.z) * (AKFLOAT)tgt);
}
return AKFS_SUCCESS;
}
/*!
*/
int16 AKFS_VbAve(
const int16 nvec, /*!< Size of normalized vector buffer */
const AKFVEC vvec[], /*!< Normalized vector buffer */
const int16 nave, /*!< Number of averaeg */
AKFVEC* vave /*!< Averaged vector */
)
{
int i;
/* arguments check */
if ((nave <= 0) || (nvec <= 0) || (nvec < nave)) {
return AKFS_ERROR;
}
/* calculate average */
vave->u.x = 0;
vave->u.y = 0;
vave->u.z = 0;
for (i=0; i<nave; i++) {
if ((vvec[i].u.x == AKFS_INIT_VALUE_F) ||
(vvec[i].u.y == AKFS_INIT_VALUE_F) ||
(vvec[i].u.z == AKFS_INIT_VALUE_F)) {
break;
}
vave->u.x += vvec[i].u.x;
vave->u.y += vvec[i].u.y;
vave->u.z += vvec[i].u.z;
}
if (i == 0) {
vave->u.x = 0;
vave->u.y = 0;
vave->u.z = 0;
} else {
vave->u.x /= i;
vave->u.y /= i;
vave->u.z /= i;
}
return AKFS_SUCCESS;
}
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