okay actually got scanlines

but fucked it over when applying it to the app

ShhShell/Terminal/CRT.metal

@@ -9,6 +9,18 @@
 #include <SwiftUI/SwiftUI_Metal.h>
 using namespace metal;
 
+[[ stitchable ]] half4 crt(float2 pos, half4 color, float2 size, float time) {
+	float2 uv = pos/size;
+	
+	// scanwave
+	half3 newCol = 0.75 + 0.5 + 0.5 * sin(time + uv.y*10 + half3(0));
+	
+	//scanlines
+	newCol *= 0.5 + 0.5 * sin(uv.y * 1000.0 + half3(0));
+	half4 output = half4(color.xyz*newCol, 1);
+	return output;
+}
+
 //learning shaders stuff here
 [[ stitchable ]] half4 sinebow(float2 pos, half4 color, float2 size, float time) {
 	float2 uv = (pos/size.x) * 2.0 - 1.0;

ShhShell/Views/ContentView.swift

@@ -12,7 +12,11 @@ struct ContentView: View {
 	@ObservedObject var hostsManager: HostsManager
 	@ObservedObject var keyManager: KeyManager
 	
+	@State private var spawnTime: Date = .now
+	
 	var body: some View {
+		TimelineView(.animation) { tl in
+			let time = tl.date.distance(to: spawnTime)
 			NavigationStack {
 				ZStack {
 					hostsManager.selectedTheme.background.suiColor.opacity(0.7)
@@ -98,6 +102,14 @@ struct ContentView: View {
 					}
 				}
 			}
+			.visualEffect { content, proxy in
+				content
+					.colorEffect(ShaderLibrary.crt(
+						.float2(proxy.size),
+						.float(time)
+					))
+			}
+		}
 	}
 }