initial commit

src/server/car.rs

@@ -0,0 +1,35 @@
+use nalgebra::*;
+
+use std::time::{Instant, Duration};
+
+#[derive(Default, Clone, Debug)]
+pub struct Car {
+    pub car_json: String,
+
+    pub pos: Vector3<f64>,
+    pub rot: Quaternion<f64>,
+    pub vel: Vector3<f64>,
+    pub rvel: Vector3<f64>,
+    pub tim: f64,
+    pub ping: f64,
+    pub last_pos_update: Option<Instant>,
+}
+
+impl Car {
+    pub fn new(car_json: String) -> Self {
+        Self {
+            car_json: car_json,
+
+            ..Default::default()
+        }
+    }
+
+    pub fn pos(&self) -> Vector3<f64> {
+        self.pos + self.vel * self.last_pos_update.map(|t| t.elapsed().as_secs_f64()).unwrap_or(0.0)
+    }
+
+    pub fn rotation(&self) -> Quaternion<f64> {
+        let t = self.last_pos_update.map(|t| t.elapsed().as_secs_f64()).unwrap_or(0.0);
+        self.rot + UnitQuaternion::from_euler_angles(self.rvel.x * t, self.rvel.y * t, self.rvel.z * t).quaternion()
+    }
+}