a4a1bf07aa
These constants are not part of the standard. We instead use our own constexpr definitions in the filament::math namespace, as part of the scalar.h include.
73 lines
3.3 KiB
C++
73 lines
3.3 KiB
C++
/*
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* Copyright (C) 2016 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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#include <gtest/gtest.h>
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#include <math/fast.h>
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#include <math/scalar.h>
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using namespace filament::math;
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class FastTest : public testing::Test {
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protected:
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};
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TEST_F(FastTest, Trig) {
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constexpr float sqrt1_2f = (float) F_SQRT1_2;
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constexpr double sqrt1_2d = F_SQRT1_2;
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constexpr float abs_error = 0.002f; // 0.2%
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<float>(-F_PI));
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EXPECT_NEAR (-sqrt1_2f, fast::sin<float>(-F_PI_2 - F_PI_4), abs_error);
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EXPECT_FLOAT_EQ(-1.0f, fast::sin<float>(-F_PI_2));
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EXPECT_NEAR (-sqrt1_2f, fast::sin<float>(-F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<float>(0.0));
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EXPECT_NEAR ( sqrt1_2f, fast::sin<float>(F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 1.0f, fast::sin<float>(F_PI_2));
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EXPECT_NEAR ( sqrt1_2f, fast::sin<float>(F_PI_2 + F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<float>(F_PI));
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EXPECT_FLOAT_EQ(-1.0f, fast::cos<float>(-F_PI));
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EXPECT_NEAR (-sqrt1_2f, fast::cos<float>(-F_PI_2 - F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::cos<float>(-F_PI_2));
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EXPECT_NEAR (sqrt1_2f, fast::cos<float>(-F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 1.0f, fast::cos<float>(0.0));
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EXPECT_NEAR (sqrt1_2f, fast::cos<float>(F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::cos<float>(F_PI_2));
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EXPECT_NEAR (-sqrt1_2f, fast::cos<float>(F_PI_2 + F_PI_4), abs_error);
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EXPECT_FLOAT_EQ(-1.0f, fast::cos<float>(F_PI));
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<double>(-F_PI));
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EXPECT_NEAR (-sqrt1_2d, fast::sin<double>(-F_PI_2 - F_PI_4), abs_error);
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EXPECT_FLOAT_EQ(-1.0f, fast::sin<double>(-F_PI_2));
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EXPECT_NEAR (-sqrt1_2d, fast::sin<double>(-F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<double>(0.0));
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EXPECT_NEAR ( sqrt1_2d, fast::sin<double>(F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 1.0f, fast::sin<double>(F_PI_2));
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EXPECT_NEAR ( sqrt1_2d, fast::sin<double>(F_PI_2 + F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::sin<double>(F_PI));
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EXPECT_FLOAT_EQ(-1.0f, fast::cos<double>(-F_PI));
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EXPECT_NEAR (-sqrt1_2d, fast::cos<double>(-F_PI_2 - F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::cos<double>(-F_PI_2));
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EXPECT_NEAR (sqrt1_2d, fast::cos<double>(-F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 1.0f, fast::cos<double>(0.0));
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EXPECT_NEAR (sqrt1_2d, fast::cos<double>(F_PI_4), abs_error);
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EXPECT_FLOAT_EQ( 0.0f, fast::cos<double>(F_PI_2));
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EXPECT_NEAR (-sqrt1_2d, fast::cos<double>(F_PI_2 + F_PI_4), abs_error);
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EXPECT_FLOAT_EQ(-1.0f, fast::cos<double>(F_PI));
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}
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