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/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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 "common/math/vec.h"
#include <nanohub_math.h>
void findOrthogonalVector(float inX, float inY, float inZ, float *outX,
float *outY, float *outZ) {
float x, y, z;
// discard the one with the smallest absolute value
if (fabsf(inX) <= fabsf(inY) && fabsf(inX) <= fabsf(inZ)) {
x = 0.0f;
y = inZ;
z = -inY;
} else if (fabsf(inY) <= fabsf(inZ)) {
x = inZ;
y = 0.0f;
z = -inX;
} else {
x = inY;
y = -inX;
z = 0.0f;
}
float magSquared = x * x + y * y + z * z;
float invMag = 1.0f / sqrtf(magSquared);
*outX = x * invMag;
*outY = y * invMag;
*outZ = z * invMag;
}
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