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/shader/particle.wgsl | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

(limited to 'src/shader/particle.wgsl')

diff --git a/src/shader/particle.wgsl b/src/shader/particle.wgsl
index 3dd61a9..227468b 100644
--- a/src/shader/particle.wgsl
+++ b/src/shader/particle.wgsl
@@ -14,8 +14,8 @@ struct Particle {
 @group(0) @binding(2) var<storage, read> particles: array<Particle>;
 
 struct VertexOutput {
-    @builtin(position) clip_position: vec4<f32>,
-    @location(0) world: vec2<f32>,
+    @builtin(position) clip_position: vec4f,
+    @location(0) world: vec2f,
     @location(1) @interpolate(flat) instance: u32,
     @location(2) @interpolate(flat) material: u32,
     @location(3) @interpolate(flat) life: f32,
@@ -29,7 +29,7 @@ fn vs_main(
     let particle = particles[n];
 
     // (0,0),(1,0),(0,1),(1,1)
-    let corner = vec2<f32>(f32(i & 1u), f32((i >> 1u) & 1u));
+    let corner = vec2f(f32(i & 1u), f32((i >> 1u) & 1u));
     let world = particle.position + corner;
 
     var out: VertexOutput;
@@ -43,9 +43,10 @@ fn vs_main(
 }
 
 @fragment
-fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
+fn fs_main(in: VertexOutput) -> @location(0) vec4f {
     let particle = particles[in.instance];
     // TODO can pack more in here and shift
     let c = palette[in.material];
-    return vec4<f32>(c.r, c.g, c.b, c.a * smoothstep(0.0, 1, in.life));
+    // if life is less than 1, smoothly reduce alpha to 0
+    return vec4f(c.r, c.g, c.b, c.a * smoothstep(0.0, 1, in.life));
 }
-- 
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