Added bodies

simulator/src/main.rs

@@ -1,3 +1,10 @@
+use solar_engine::Body;
+
 fn main() {
     println!("Hello, world!");
+    let earth = Body::new("Earth", 5.972e24, [1.496e11, 0.0], [0.0, 0.0]);
+    println!("Created body: {:?}", earth);
+    
+    let sun = Body::new("Sun", 1.989e30, [0.0, 0.0], [0.0, 0.0]);
+    println!("Created body: {:?}", sun);
 }

solar_engine/src/body.rs

@@ -0,0 +1,18 @@
+#[derive(Debug)]
+pub struct Body {
+    pub name: String,
+    pub mass: f64,
+    pub position: [f64; 2],
+    pub velocity: [f64; 2],
+}
+
+impl Body {
+    pub fn new(name: &str, mass: f64, position: [f64; 2], velocity: [f64; 2]) -> Self {
+        Self {
+            name: name.to_string(),
+            mass,
+            position,
+            velocity,
+        }
+    }
+}

solar_engine/src/lib.rs

@@ -1,14 +1,3 @@
-pub fn add(left: u64, right: u64) -> u64 {
-    left + right
-}
+mod body;
+pub use body::Body;
 
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
-    }
-}