86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*
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Copyright (c) 2009 Christopher A. Taylor. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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* Neither the name of LibCat nor the names of its contributors may be used
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to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef CAT_SCALAR_HPP
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#define CAT_SCALAR_HPP
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#include <cat/Platform.hpp>
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#include <cmath>
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namespace cat {
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// PI
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#define CAT_TWO_PI_64 6.283185307179586476925286766559
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#define CAT_TWO_PI_32 6.28318531f
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#define CAT_PI_64 3.1415926535897932384626433832795
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#define CAT_PI_32 3.14159265f
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#define CAT_HALF_PI_64 1.5707963267948966192313216916398
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#define CAT_HALF_PI_32 1.5707963268f
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#define CAT_QUARTER_PI_64 0.78539816339744830961566084581988
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#define CAT_QUARTER_PI_32 0.7853981634f
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#define CAT_INV_PI_64 0.31830988618379067153776752674503
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#define CAT_INV_PI_32 0.3183098862f
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// Angle conversion
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inline f64 Deg2Rad(f64 angle)
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{
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return angle * CAT_TWO_PI_64 / 360.0;
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}
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inline f32 Deg2Rad(f32 angle)
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{
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return angle * CAT_TWO_PI_32 / 360.0f;
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}
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inline f64 Rad2Deg(f64 angle)
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{
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return angle * 360.0 / CAT_TWO_PI_64;
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}
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inline f32 Rad2Deg(f32 angle)
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{
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return angle * 360.0f / CAT_TWO_PI_32;
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}
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// Generic clamp() function
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template<class Scalar>
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void Clamp(Scalar &x, Scalar low, Scalar high)
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{
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if (x < low) x = low;
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else if (x > high) x = high;
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}
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// Fast inverse square root
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f32 InvSqrt(f32 x);
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} // namespace cat
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#endif // CAT_SCALAR_HPP
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