bevy_dolly 0.0.5

The dolly abstraction layer for the bevy game framework
Documentation 
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//use std::marker::PhantomData;

//use glam::Vec3;
use bevy_math::Vec3;
use bevy_transform::prelude::Transform;

use crate::dolly::{
    driver::RigDriver,
    //handedness::Handedness,
    rig::RigUpdateParams,
    //transform::Transform,
};

/// Offsets the camera along a vector, in the coordinate space of the parent.
#[derive(Debug)]
pub struct Arm {
    pub offset: Vec3,
}

impl Arm {
    pub fn new(offset: Vec3) -> Self {
        Self { offset }
    }
}

impl RigDriver for Arm {
    fn update(&mut self, params: RigUpdateParams) -> Transform {
        Transform {
            translation: params.parent.translation + params.parent.rotation * self.offset,
            rotation: params.parent.rotation,
            scale: Vec3::ONE,
        }
    }
}