53 lines
1.7 KiB
C++
53 lines
1.7 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LATINIME_GEOMETRY_UTILS_H
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#define LATINIME_GEOMETRY_UTILS_H
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#include <cmath>
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#include "defines.h"
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#define ROUND_FLOAT_10000(f) ((f) < 1000.0f && (f) > 0.001f) \
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? (floorf((f) * 10000.0f) / 10000.0f) : (f)
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namespace latinime {
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static inline float SQUARE_FLOAT(const float x) { return x * x; }
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static AK_FORCE_INLINE float getAngle(const int x1, const int y1, const int x2, const int y2) {
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const int dx = x1 - x2;
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const int dy = y1 - y2;
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if (dx == 0 && dy == 0) return 0.0f;
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return atan2f(static_cast<float>(dy), static_cast<float>(dx));
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}
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static AK_FORCE_INLINE float getAngleDiff(const float a1, const float a2) {
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const float deltaA = fabsf(a1 - a2);
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const float diff = ROUND_FLOAT_10000(deltaA);
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if (diff > M_PI_F) {
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const float normalizedDiff = 2.0f * M_PI_F - diff;
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return ROUND_FLOAT_10000(normalizedDiff);
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}
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return diff;
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}
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static AK_FORCE_INLINE int getDistanceInt(const int x1, const int y1, const int x2,
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const int y2) {
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return static_cast<int>(hypotf(static_cast<float>(x1 - x2), static_cast<float>(y1 - y2)));
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}
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} // namespace latinime
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#endif // LATINIME_GEOMETRY_UTILS_H
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