Number Type

The number type is a fundamental concept of the kernel, which is used to represent the number. The number type is a generic type, which means you can use any type that implements the NumberType trait as the number type.

NumberType trait was like this:

pub trait DefaultNumberValueTrait {
    fn default() -> Self;
    fn default_eps() -> Self;
    fn zero() -> Self;
    fn from_f64(value: f64) -> Self;
    fn pi() -> Self;
}

pub trait NumberType:
    DefaultNumberValueTrait
    + Add<Output = Self>
    + Sub<Output = Self>
    + Mul<Output = Self>
    + Div<Output = Self>
    + Neg<Output = Self>
    + PartialOrd
    + Clone
    + Copy
    + Debug
    + Display
{
    fn equals(self, other: Self) -> bool;
    fn sqrt(self) -> Self;
    fn abs(self) -> Self;
    fn sin(self) -> Self;
    fn cos(self) -> Self;
    fn acos(self) -> Self;
    fn atan(self) -> Self;
    fn atan2(self, other: Self) -> Self;
}

:::note equals return true if two numbers are equal, which means the absolute difference between them is less than default_eps. :::

RCGAL implements the NumberType trait for the f32 and f64, and you can use them directly. If you want to use other types, you need to implement the NumberType trait for them.