regenerate orbit lines based on system tick interval

1 files changed, 18 insertions, 6 deletions

diff --git a/src/tacmap/body_render.rs b/src/tacmap/body_render.rs
index 8b32532..92ac13f 100644
--- a/src/tacmap/body_render.rs
+++ b/src/tacmap/body_render.rs
@@ -1,7 +1,7 @@
 use std::error::Error;
 
 use crate::solar_system::Kilometers;
-use crate::timeman::Second;
+use crate::timeman::{SYSTEM_TICK_INTERVAL, Second};
 use crate::wgpuctx::{WgpuCtx, pipeline::RenderPipelineBuilder};
 
 use super::*;
@@ -92,6 +92,18 @@ impl BodyRenderer
             return Ok(());
         }
 
+        //Round to the nearest tick
+        let tick_time = match self.last_time {
+            Some(last_time) => {
+                let this_tick = time / SYSTEM_TICK_INTERVAL;
+                let last_tick = last_time / SYSTEM_TICK_INTERVAL;
+
+                if this_tick == last_tick { return Ok(()) }
+                this_tick * SYSTEM_TICK_INTERVAL
+            }
+            None => 0
+        };
+
         self.last_time = Some(time);
 
         let (_, bodies_buffer) = match &self.body_instance_buffer {
@@ -101,11 +113,11 @@ impl BodyRenderer
 
         let bodies = solar_system.bodies();
         let body_instances = bodies.iter().map(|body| {
-            let position = body.position();
-            let origin = match body.get_orbits() {
-                Some(origin_id) => {
-                    let origin_body = &bodies[origin_id];
-                    origin_body.position()
+            let position = body.relative_position();
+            let origin = match body.get_orbit() {
+                Some(orbit) => {
+                    let origin_body = &bodies[orbit.parent()];
+                    origin_body.relative_position()
                 },
                 None => cgmath::Vector3::new(0.0, 0.0, 0.0)
             };