emote-cd2025/util.lua
2022-06-19 16:28:06 +02:00

28 lines
500 B
Lua

local util = {}
-- helper functions
function util.facedir_to_look_horizontal(dir)
if dir == 0 then
return 0
elseif dir == 1 then
return math.pi * 3/2
elseif dir == 2 then
return math.pi
elseif dir == 3 then
return math.pi / 2
else
return nil
end
end
function util.vector_rotate_xz(vec, angle)
local a = angle - (math.pi * 3/2)
return {
x = (vec.z * math.sin(a)) - (vec.x * math.cos(a)),
y = vec.y,
z = (vec.z * math.cos(a)) - (vec.x * math.sin(a))
}
end
emote.util = util