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| author | SmallJoker <SmallJoker@users.noreply.github.com> | 2018-08-03 00:25:37 +0200 |
|---|---|---|
| committer | Paramat <paramat@users.noreply.github.com> | 2018-08-02 23:25:37 +0100 |
| commit | f3997025fd4785606fe4f8b05037e9463c5be7da (patch) | |
| tree | fb334a76f0781a2dd944f25b3e4969cd56a5241a /src/util | |
| parent | 741e3efaf5c8e6d85178051d8655971a7f8b0bb9 (diff) | |
| download | minetest-f3997025fd4785606fe4f8b05037e9463c5be7da.tar.gz minetest-f3997025fd4785606fe4f8b05037e9463c5be7da.tar.bz2 minetest-f3997025fd4785606fe4f8b05037e9463c5be7da.zip | |
Smoothed yaw rotation for objects (#6825)
Diffstat (limited to 'src/util')
| -rw-r--r-- | src/util/numeric.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/util/numeric.h b/src/util/numeric.h index f7df19ca9..61370a3f4 100644 --- a/src/util/numeric.h +++ b/src/util/numeric.h @@ -376,3 +376,22 @@ inline u32 npot2(u32 orig) { orig |= orig >> 16; return orig + 1; } + +// Gradual steps towards the target value in a wrapped (circular) system +// using the shorter of both ways +template<typename T> +inline void wrappedApproachShortest(T ¤t, const T target, const T stepsize, + const T maximum) +{ + T delta = target - current; + if (delta < 0) + delta += maximum; + + if (delta > stepsize && maximum - delta > stepsize) { + current += (delta < maximum / 2) ? stepsize : -stepsize; + if (current >= maximum) + current -= maximum; + } else { + current = target; + } +} |