From a779011b9048cdda04887c77e20ee8936f332a7a Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Tue, 25 Aug 2026 00:32:16 -0700
Subject: vfx pipeline

---
 src/content/entities/entity_bullet_emitter.rs | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

(limited to 'src/content/entities')

diff --git a/src/content/entities/entity_bullet_emitter.rs b/src/content/entities/entity_bullet_emitter.rs
index c014e8c..3788dd9 100644
--- a/src/content/entities/entity_bullet_emitter.rs
+++ b/src/content/entities/entity_bullet_emitter.rs
@@ -2,7 +2,7 @@ use glam::{IVec2, Vec2};
 use rapier2d::dynamics::RigidBodyBuilder;
 
 use crate::{
-    content::materials::MaterialId,
+    content::{materials::MaterialId, vfx::VfxMaterialId},
     input::Input,
     sim::{
         cell::Cell,
@@ -10,6 +10,7 @@ use crate::{
         lib::force::apply_bullet,
         sim_manager::SimCtx,
     },
+    vfx::VfxLine,
 };
 
 struct BulletEmitterEntityBehaviour {
@@ -27,11 +28,21 @@ impl EntityBehaviour for BulletEmitterEntityBehaviour {
         if let Some(target) = self.target {
             let pos = update_ctx.entity_data.transform(ctx).unwrap().0;
             let dir = (target - pos).normalize();
+            let from = pos + (dir * 4.0);
 
             self.shot_timer -= delta_time;
             if self.shot_timer <= 0.0 {
-                apply_bullet(ctx, pos + (dir * 4.0), target, 70);
-                self.shot_timer = 0.1;
+                apply_bullet(ctx, from, target, 70);
+                // 0.1 seconds to travel 200 cells
+                let lifetime = (target - from).length() / 1000.0;
+                ctx.vfx_writer.write_vfx_line(VfxLine::new(
+                    from,
+                    target,
+                    1.3,
+                    VfxMaterialId::Tracer,
+                    lifetime,
+                ));
+                self.shot_timer = 0.2;
             }
 
             self.life -= delta_time;
-- 
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