dolly/drivers/
arm.rs

1use std::marker::PhantomData;
2
3use glam::{Quat, Vec3};
4
5use crate::{
6    driver::RigDriver, handedness::Handedness, rig::RigUpdateParams, transform::Transform,
7};
8
9/// Offsets the camera along a vector, in the coordinate space of the parent.
10#[derive(Debug)]
11pub struct Arm {
12    pub offset: mint::Vector3<f32>,
13}
14
15impl Arm {
16    pub fn new<V>(offset: V) -> Self
17    where
18        V: Into<mint::Vector3<f32>>,
19    {
20        let offset = offset.into();
21
22        Self { offset }
23    }
24}
25
26impl<H: Handedness> RigDriver<H> for Arm {
27    fn update(&mut self, params: RigUpdateParams<H>) -> Transform<H> {
28        let parent_position: Vec3 = params.parent.position.into();
29        let parent_rotation: Quat = params.parent.rotation.into();
30        let offset: Vec3 = self.offset.into();
31
32        let position = parent_position + parent_rotation * offset;
33
34        Transform {
35            rotation: params.parent.rotation,
36            position: position.into(),
37            phantom: PhantomData,
38        }
39    }
40}
dolly/drivers/arm.rs

dolly/drivers/
arm.rs
