begin work on body info window

1 files changed, 60 insertions, 0 deletions

diff --git a/src/solar_system/fleet.rs b/src/solar_system/fleet.rs
new file mode 100644
index 0000000..c331cd7
--- /dev/null
+++ b/src/solar_system/fleet.rs
@@ -0,0 +1,60 @@
+use crate::solar_system::{GRAVITATIONAL_CONSTANT, Kilometers, SolarSystem, body::OrbitalBody, orbit::StaticOrbit};
+use crate::timeman::Second;
+
+pub type FleetId = usize;
+
+pub struct Fleet
+{
+    id: FleetId,
+    name: String,
+
+    position: cgmath::Vector3<Kilometers>,
+    velocity: cgmath::Vector3<f32>,
+    acceleration: cgmath::Vector3<f32>,
+
+    baked_orbit: Option<(f64, StaticOrbit)>,
+}
+
+impl Fleet
+{
+    pub fn new(
+        id: FleetId,
+        name: String)
+    -> Self
+    {
+        Self {
+            id,
+            name,
+            position: cgmath::vec3(0.0, 0.0, 0.0),
+            velocity: cgmath::vec3(0.0, 0.0, 0.0),
+            acceleration: cgmath::vec3(0.0, 0.0, 0.0),
+            baked_orbit: None,
+        }
+    }
+
+    pub fn id(&self) -> FleetId { self.id }
+    pub fn name(&self) -> &String { &self.name }
+
+    pub fn make_orbit(
+        &mut self,
+        body: &OrbitalBody,
+        radius: Kilometers)
+    {
+        let sgp = body.mass() * GRAVITATIONAL_CONSTANT;
+        self.baked_orbit = Some((sgp, StaticOrbit::new_circular(body, radius)));
+    }
+
+    pub fn tick(
+        &mut self,
+        time: Second)
+    {
+        match &self.baked_orbit {
+            Some(orbit_info) => {
+                let sgp = orbit_info.0;
+                let orbit = &orbit_info.1;
+                self.position = orbit.calculate_position_at(sgp, time);
+            },
+            None => {}
+        }
+    }
+}