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/*
* Copyright (C) 2012 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.
*/
#ifndef LATINIME_GEOMETRY_UTILS_H
#define LATINIME_GEOMETRY_UTILS_H
#include <cmath>
#include "defines.h"
#define ROUND_FLOAT_10000(f) ((f) < 1000.0f && (f) > 0.001f) \
? (floorf((f) * 10000.0f) / 10000.0f) : (f)
namespace latinime {
static inline float SQUARE_FLOAT(const float x) { return x * x; }
static AK_FORCE_INLINE float getAngle(const int x1, const int y1, const int x2, const int y2) {
const int dx = x1 - x2;
const int dy = y1 - y2;
if (dx == 0 && dy == 0) return 0.0f;
return atan2f(static_cast<float>(dy), static_cast<float>(dx));
}
static AK_FORCE_INLINE float getAngleDiff(const float a1, const float a2) {
const float deltaA = fabsf(a1 - a2);
const float diff = ROUND_FLOAT_10000(deltaA);
if (diff > M_PI_F) {
const float normalizedDiff = 2.0f * M_PI_F - diff;
return ROUND_FLOAT_10000(normalizedDiff);
}
return diff;
}
static AK_FORCE_INLINE int getDistanceInt(const int x1, const int y1, const int x2,
const int y2) {
return static_cast<int>(hypotf(static_cast<float>(x1 - x2), static_cast<float>(y1 - y2)));
}
} // namespace latinime
#endif // LATINIME_GEOMETRY_UTILS_H
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