PI :f32: 3.14159265;
TAU :f32: 6.28318530;
DEG2RAD :f32: 0.01745329;
RAD2DEG :f32: 57.2957795;

sqrt :: (x: $T) -> T #builtin;
sin :: (x: $T) -> T #builtin;
cos :: (x: $T) -> T #builtin;
floor :: (x: $T) -> T #builtin;

min :: (a: $T, b: T) -> T {
    if a < b then a else b;
}

max :: (a: $T, b: T) -> T {
    if a > b then a else b;
}

clamp :: (val: $T, lo: T, hi: T) -> T {
    if val < lo then lo
    else if val > hi then hi
    else val;
}

abs :: (x: $T) -> T {
    if x < 0 then 0 - x else x;
}

lerp :: (a: f32, b: f32, t: f32) -> f32 {
    a + (b - a) * t;
}

sign :: (x: $T) -> T {
    if x > 0 then 1
    else if x < 0 then 0 - 1
    else 0;
}