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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::codegen::Bindings::XRSpaceBinding;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::reflector::reflect_dom_object;
use crate::dom::bindings::root::{Dom, DomRoot};
use crate::dom::eventtarget::EventTarget;
use crate::dom::globalscope::GlobalScope;
use crate::dom::xrreferencespace::XRReferenceSpace;
use crate::dom::xrsession::XRSession;
use dom_struct::dom_struct;
use euclid::{RigidTransform3D, Rotation3D, Vector3D};
use webvr_traits::WebVRFrameData;
#[dom_struct]
pub struct XRSpace {
eventtarget: EventTarget,
session: Dom<XRSession>,
is_viewerspace: bool,
}
impl XRSpace {
pub fn new_inherited(session: &XRSession) -> XRSpace {
XRSpace {
eventtarget: EventTarget::new_inherited(),
session: Dom::from_ref(session),
is_viewerspace: false,
}
}
fn new_viewerspace_inner(session: &XRSession) -> XRSpace {
XRSpace {
eventtarget: EventTarget::new_inherited(),
session: Dom::from_ref(session),
is_viewerspace: true,
}
}
pub fn new_viewerspace(global: &GlobalScope, session: &XRSession) -> DomRoot<XRSpace> {
reflect_dom_object(
Box::new(XRSpace::new_viewerspace_inner(session)),
global,
XRSpaceBinding::Wrap,
)
}
}
impl XRSpace {
/// Gets pose represented by this space
///
/// The reference origin used is common between all
/// get_pose calls for spaces from the same device, so this can be used to compare
/// with other spaces
pub fn get_pose(&self, base_pose: &WebVRFrameData) -> RigidTransform3D<f64> {
if let Some(reference) = self.downcast::<XRReferenceSpace>() {
reference.get_pose(base_pose)
} else if self.is_viewerspace {
XRSpace::viewer_pose_from_frame_data(base_pose)
} else {
unreachable!()
}
}
pub fn viewer_pose_from_frame_data(data: &WebVRFrameData) -> RigidTransform3D<f64> {
let pos = data.pose.position.unwrap_or([0., 0., 0.]);
let translation = Vector3D::new(pos[0] as f64, pos[1] as f64, pos[2] as f64);
let orient = data.pose.orientation.unwrap_or([0., 0., 0., 0.]);
let rotation = Rotation3D::quaternion(
orient[0] as f64,
orient[1] as f64,
orient[2] as f64,
orient[3] as f64,
);
RigidTransform3D::new(rotation, translation)
}
pub fn session(&self) -> &XRSession {
&self.session
}
}
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