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use super::{ Quat };
pub fn slerp(
left: Quat,
right: Quat,
amount: f32
) -> Quat{
let num2;
let num3;
let num = amount;
let mut num4 = (((left.v.x * right.v.x) + (left.v.y * right.v.y)) + (left.v.z * right.v.z))
+ (left.s * right.s);
let mut flag = false;
if num4 < 0.0 {
flag = true;
num4 = -num4;
}
if num4 > 0.999_999 {
num3 = 1.0 - num;
num2 = if flag { -num } else { num };
} else {
let num5 = num4.acos();
let num6 = 1.0 / num5.sin();
num3 = ((1.0 - num) * num5).sin() * num6;
num2 = if flag {
-(num * num5).sin() * num6
} else {
(num * num5).sin() * num6
};
}
Quat::new(
(num3 * left.s) + (num2 * right.s),
(num3 * left.v.x) + (num2 * right.v.x),
(num3 * left.v.y) + (num2 * right.v.y),
(num3 * left.v.z) + (num2 * right.v.z),
)
}