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Lightweight trigonometry doc (#1356)

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* Doc units of trig functions

* "Very simple" yet I made a mistake

* sins returns in [-0x7FFF,0x7FFF] as the [-1,1] range

* Also `sys_math_atan.c`

* Remove `@param`s without descriptions

* Add note on Math_Atan2S/F arguments being unlike atan2

* "from (1,0) to (x,y)" -> "from vector ..."

* arg names -> `angle`

* Improve `@return` comment on atans
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Dragorn421 2022-10-15 23:29:36 +02:00 • committed by GitHub
parent 0b38f6e678
commit 0283493db8
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8
src/code/sys_math.c
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@ -38,10 +38,18 @@ f32 Math_PowF(f32 base, s32 exp) {
return ret;
}
/**
* @param angle radians
* @return sin(angle)
*/
f32 Math_SinF(f32 angle) {
return sins((s16)(angle * (0x7FFF / M_PI))) * SHT_MINV;
}
/**
* @param angle radians
* @return cos(angle)
*/
f32 Math_CosF(f32 angle) {
return coss((s16)(angle * (0x7FFF / M_PI))) * SHT_MINV;
}