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| author | Dan Goodliffe <dan@randomdan.homeip.net> | 2021-02-14 13:06:50 +0000 |
|---|---|---|
| committer | Dan Goodliffe <dan@randomdan.homeip.net> | 2021-02-14 13:06:50 +0000 |
| commit | a117836ed6bbbc750830a96647da88d5506e69f8 (patch) | |
| tree | cfa56e664c825c4f618c37164b2cffac15bcc0e1 /utility/maths.cpp | |
| parent | Simplify flat_angle (diff) | |
| download | ilt-a117836ed6bbbc750830a96647da88d5506e69f8.tar.bz2 ilt-a117836ed6bbbc750830a96647da88d5506e69f8.tar.xz ilt-a117836ed6bbbc750830a96647da88d5506e69f8.zip | |
Construct an Arc from three points
Diffstat (limited to 'utility/maths.cpp')
| -rw-r--r-- | utility/maths.cpp | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/utility/maths.cpp b/utility/maths.cpp index 5cae411..e36c91e 100644 --- a/utility/maths.cpp +++ b/utility/maths.cpp @@ -39,15 +39,16 @@ normalize(float ang) return ang; } -Arc -create_arc(const glm::vec3 & centre3, const glm::vec3 & e0p, const glm::vec3 & e1p) +Arc::Arc(const glm::vec3 & centre3, const glm::vec3 & e0p, const glm::vec3 & e1p) : + Arc([&]() -> Arc { + const auto diffa = e0p - centre3; + const auto diffb = e1p - centre3; + const auto anga = flat_angle(diffa); + const auto angb = [&diffb, &anga]() { + const auto angb = flat_angle(diffb); + return (angb < anga) ? angb + two_pi : angb; + }(); + return {anga, angb}; + }()) { - const auto diffa = centre3 - e0p; - const auto diffb = centre3 - e1p; - const auto anga = flat_angle(diffa); - const auto angb = [&diffb, &anga]() { - const auto angb = flat_angle(diffb); - return (angb < anga) ? angb + two_pi : angb; - }(); - return {anga, angb}; } |