| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef FLUTTER_FML_MATH_H_ |
| #define FLUTTER_FML_MATH_H_ |
| |
| namespace flutter { |
| namespace math { |
| |
| // e |
| constexpr float kE = 2.7182818284590452354; |
| |
| // log_2 e |
| constexpr float kLog2E = 1.4426950408889634074; |
| |
| // log_10 e |
| constexpr float kLog10E = 0.43429448190325182765; |
| |
| // log_e 2 |
| constexpr float kLogE2 = 0.69314718055994530942; |
| |
| // log_e 10 |
| constexpr float kLogE10 = 2.30258509299404568402; |
| |
| // pi |
| constexpr float kPi = 3.14159265358979323846; |
| |
| // pi/2 |
| constexpr float kPiOver2 = 1.57079632679489661923; |
| |
| // pi/4 |
| constexpr float kPiOver4 = 0.78539816339744830962; |
| |
| // 1/pi |
| constexpr float k1OverPi = 0.31830988618379067154; |
| |
| // 2/pi |
| constexpr float k2OverPi = 0.63661977236758134308; |
| |
| // 2/sqrt(pi) |
| constexpr float k2OverSqrtPi = 1.12837916709551257390; |
| |
| // sqrt(2) |
| constexpr float kSqrt2 = 1.41421356237309504880; |
| |
| // 1/sqrt(2) |
| constexpr float k1OverSqrt2 = 0.70710678118654752440; |
| |
| } // namespace math |
| } // namespace flutter |
| |
| #endif // FLUTTER_FML_MATH_H_ |