Function lookat 

pub fn lookat<T>(
    eye: &Vector3<T>,
    dest: &Vector3<T>,
    up: &Vector3<T>,
) -> Matrix4<T>
where
    T: FloatScalar,

Creates a view matrix looking from eye position to target.

Parameters

• eye: Camera position
• dest: Target position to look at
• up: Up vector (typically (0, 1, 0))

The resulting matrix transforms from world space to view space.