rust-webvr 0.2.0

Safe rust API that provides a way to interact with Virtual Reality headsets and integration with vendor specific SDKs like OpenVR and Oculus. The API is inspired on the easy to use WebVR API but adapted to Rust design patterns
Documentation 
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use {VRDisplay, VRDisplayData, VRFrameData, VRStageParameters, VRLayer};
use super::super::utils;
use std::sync::Arc;
use std::cell::RefCell;
pub type MockVRDisplayPtr = Arc<RefCell<MockVRDisplay>>;
use std::time::Duration;
use std::thread;

pub struct MockVRDisplay {
    display_id: u64
}

unsafe impl Send for MockVRDisplay {}
unsafe impl Sync for MockVRDisplay {}

impl MockVRDisplay {
    pub fn new() -> MockVRDisplayPtr {
        Arc::new(RefCell::new(MockVRDisplay {
            display_id: utils::new_id(),
        }))
    }
}

impl VRDisplay for MockVRDisplay {

    fn id(&self) -> u64 {
        self.display_id
    }

    fn data(&self) -> VRDisplayData {
        let mut data = VRDisplayData::default();
        
        // Mock display data
        // Simulates a virtual HTC Vive

        data.display_name = "Mock VRDisplay".into();
        data.display_id = self.display_id;
        data.connected = true;

        data.capabilities.can_present = true;
        data.capabilities.has_orientation = true;
        data.capabilities.has_external_display = true;
        data.capabilities.has_position = true;

        data.stage_parameters = Some(VRStageParameters {
            sitting_to_standing_transform: [-0.9317312, 0.0, 0.36314875, 0.0, 0.0, 0.99999994, 0.0, 0.0, -0.36314875, 
                                            0.0, -0.9317312, 0.0, 0.23767996, 1.6813644, 0.45370483, 1.0],
            size_x: 2.0,
            size_z: 2.0
        });

        data.left_eye_parameters.offset = [0.035949998, 0.0, 0.015];
        data.left_eye_parameters.render_width = 1512;
        data.left_eye_parameters.render_height = 1680;
        data.left_eye_parameters.field_of_view.up_degrees = 55.82093048095703;
        data.left_eye_parameters.field_of_view.right_degrees = 51.26948547363281;
        data.left_eye_parameters.field_of_view.down_degrees = 55.707801818847656;
        data.left_eye_parameters.field_of_view.left_degrees = 54.42263412475586;

        data.right_eye_parameters.offset = [-0.035949998, 0.0, 0.015];
        data.right_eye_parameters.render_width = 1512;
        data.right_eye_parameters.render_height = 1680;
        data.right_eye_parameters.field_of_view.up_degrees = 55.898048400878906;
        data.right_eye_parameters.field_of_view.right_degrees = 54.37410354614258;
        data.right_eye_parameters.field_of_view.down_degrees = 55.614715576171875;
        data.right_eye_parameters.field_of_view.left_degrees = 51.304901123046875;
        
        data
    }

    fn inmediate_frame_data(&self, _near_z: f64, _far_z: f64) -> VRFrameData {
        let mut data = VRFrameData::default();
        // Position vector
        data.pose.position = Some([0.5, -0.7, -0.3]);
        // Orientation quaternion
        // TODO: Add animation
        data.pose.orientation = Some([0.9385081, -0.08066622, -0.3347714, 0.024972256]);

        // Simulates HTC Vive projections
        data.left_projection_matrix = [0.75620246, 0.0, 0.0, 0.0, 0.0, 
                                       0.68050665, 0.0, 0.0, -0.05713458, 
                                      -0.0021225351, -1.0000999, -1.0, 
                                       0.0, 0.0, -0.10000999, 0.0];

        data.left_view_matrix = [1.0, 0.0, 0.0, 0.0, 
                                 0.0, 1.0, 0.0, 0.0, 
                                 0.0, 0.0, 1.0, 0.0, 
                                -0.035949998, 0.0, 0.015, 1.0];

        data.right_projection_matrix = [0.75646526, 0.0, 0.0, 0.0, 
                                        0.0, 0.68069947, 0.0, 0.0, 
                                        0.055611316, -0.005315368, -1.0000999, -1.0, 
                                        0.0, 0.0, -0.10000999, 0.0];

        data.right_view_matrix = [1.0, 0.0, 0.0, 0.0,
                                  0.0, 1.0, 0.0, 0.0,
                                  0.0, 0.0, 1.0, 0.0,
                                  0.035949998, 0.0, 0.015, 1.0];

        data.timestamp = utils::timestamp();

        data
    }

    fn synced_frame_data(&self, near_z: f64, far_z: f64) -> VRFrameData {
        self.inmediate_frame_data(near_z, far_z)
    }

    fn reset_pose(&mut self) {

    }

    fn sync_poses(&mut self) {
        // Simulate Vsync
        thread::sleep(Duration::from_millis(1));
    }

    fn submit_frame(&mut self, _layer: &VRLayer) {

    }
}