From e7b107a96e2c4cf9432b7cc2a4bf4852c0f125ae Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?L=27=C3=A9lectron=20rare?=
 <108685187+electron-rare@users.noreply.github.com>
Date: Fri, 26 Jun 2026 12:13:55 +0200
Subject: [PATCH] feat(avlivebody): render settings state object

Add RenderSettings ObservableObject with Published defaults for
layer visibility, mesh material, video opacity, light intensities,
camera FOV, and panel toggle. Add RenderSettingsTests asserting
all eleven defaults via TDD red-green cycle.
---
 .../Sources/AVLiveBody/RenderSettings.swift   | 31 +++++++++++++++++++
 .../AVLiveBodyTests/RenderSettingsTests.swift | 21 +++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 avlivebody-mac/Sources/AVLiveBody/RenderSettings.swift
 create mode 100644 avlivebody-mac/Tests/AVLiveBodyTests/RenderSettingsTests.swift

diff --git a/avlivebody-mac/Sources/AVLiveBody/RenderSettings.swift b/avlivebody-mac/Sources/AVLiveBody/RenderSettings.swift
new file mode 100644
index 0000000..3cc821e
--- /dev/null
+++ b/avlivebody-mac/Sources/AVLiveBody/RenderSettings.swift
@@ -0,0 +1,31 @@
+// avlivebody-mac/Sources/AVLiveBody/RenderSettings.swift
+import SwiftUI
+
+/// Live visual settings for AVLiveBody. ContentView observes this and
+/// pushes changes to SceneController. Defaults chosen so the scene is
+/// lit and everything visible out of the box.
+@MainActor
+final class RenderSettings: ObservableObject {
+    // Layer visibility
+    @Published var showSkeleton: Bool = true
+    @Published var showMesh: Bool = true
+    @Published var showVideo: Bool = true
+
+    // Mesh material
+    @Published var meshMetallic: Bool = false
+    @Published var meshRoughness: Double = 0.6
+
+    // Video quad
+    @Published var videoOpacity: Double = 1.0
+
+    // Lights (RealityKit DirectionalLight intensities)
+    @Published var keyIntensity: Double = 4000
+    @Published var fillIntensity: Double = 1500
+    @Published var rimIntensity: Double = 2000
+
+    // Camera
+    @Published var fieldOfView: Double = 55
+
+    // Panel visibility
+    @Published var showPanel: Bool = false
+}
diff --git a/avlivebody-mac/Tests/AVLiveBodyTests/RenderSettingsTests.swift b/avlivebody-mac/Tests/AVLiveBodyTests/RenderSettingsTests.swift
new file mode 100644
index 0000000..ac9dcd4
--- /dev/null
+++ b/avlivebody-mac/Tests/AVLiveBodyTests/RenderSettingsTests.swift
@@ -0,0 +1,21 @@
+// avlivebody-mac/Tests/AVLiveBodyTests/RenderSettingsTests.swift
+import XCTest
+@testable import AVLiveBody
+
+@MainActor
+final class RenderSettingsTests: XCTestCase {
+    func testDefaults() {
+        let s = RenderSettings()
+        XCTAssertTrue(s.showSkeleton)
+        XCTAssertTrue(s.showMesh)
+        XCTAssertTrue(s.showVideo)
+        XCTAssertFalse(s.meshMetallic)
+        XCTAssertEqual(s.meshRoughness, 0.6, accuracy: 1e-9)
+        XCTAssertEqual(s.videoOpacity, 1.0, accuracy: 1e-9)
+        XCTAssertEqual(s.keyIntensity, 4000, accuracy: 1e-9)
+        XCTAssertEqual(s.fillIntensity, 1500, accuracy: 1e-9)
+        XCTAssertEqual(s.rimIntensity, 2000, accuracy: 1e-9)
+        XCTAssertEqual(s.fieldOfView, 55, accuracy: 1e-9)
+        XCTAssertFalse(s.showPanel)
+    }
+}