From 83605aeb60a745b4e5d5bafc2ee56602ae647155 Mon Sep 17 00:00:00 2001
From: Nick Lockwood <nick@charcoaldesign.co.uk>
Date: Sat, 23 Sep 2023 18:28:50 +0100
Subject: [PATCH] Improve example app

---
 Euclid.xcodeproj/project.pbxproj              |  4 +++
 .../xcshareddata/xcschemes/Example.xcscheme   |  2 +-
 Example/EuclidMesh.swift                      | 26 +++++++++++++++++++
 Example/RealityKitViewController.swift        | 20 ++++----------
 Example/SceneKitViewController.swift          | 13 +---------
 5 files changed, 37 insertions(+), 28 deletions(-)
 create mode 100644 Example/EuclidMesh.swift

diff --git a/Euclid.xcodeproj/project.pbxproj b/Euclid.xcodeproj/project.pbxproj
index 64fd0f70..3b3ba877 100644
--- a/Euclid.xcodeproj/project.pbxproj
+++ b/Euclid.xcodeproj/project.pbxproj
@@ -12,6 +12,7 @@
 		010A633B2A955BE9000E3306 /* MeshExportTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 010A633A2A955BE9000E3306 /* MeshExportTests.swift */; };
 		0112D5C928EE29BB00A1C085 /* Euclid+RealityKit.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0112D5C828EE29BB00A1C085 /* Euclid+RealityKit.swift */; };
 		0125478027AFD53900C442C3 /* MeshShapeTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0125477F27AFD53900C442C3 /* MeshShapeTests.swift */; };
+		0128EEBB2ABA607A00E60976 /* EuclidMesh.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0128EEBA2ABA607A00E60976 /* EuclidMesh.swift */; };
 		013312DD21CA532A00626F1B /* PlaneTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 013312DC21CA532A00626F1B /* PlaneTests.swift */; };
 		013499932902FB5900CED6BE /* Euclid+SIMD.swift in Sources */ = {isa = PBXBuildFile; fileRef = 013499922902FB5900CED6BE /* Euclid+SIMD.swift */; };
 		0134999729043ACC00CED6BE /* RealityKitViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 0134999629043ACC00CED6BE /* RealityKitViewController.swift */; };
@@ -112,6 +113,7 @@
 		010A633A2A955BE9000E3306 /* MeshExportTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MeshExportTests.swift; sourceTree = "<group>"; };
 		0112D5C828EE29BB00A1C085 /* Euclid+RealityKit.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Euclid+RealityKit.swift"; sourceTree = "<group>"; };
 		0125477F27AFD53900C442C3 /* MeshShapeTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MeshShapeTests.swift; sourceTree = "<group>"; };
+		0128EEBA2ABA607A00E60976 /* EuclidMesh.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EuclidMesh.swift; sourceTree = "<group>"; };
 		013312DC21CA532A00626F1B /* PlaneTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PlaneTests.swift; sourceTree = "<group>"; };
 		013499922902FB5900CED6BE /* Euclid+SIMD.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = "Euclid+SIMD.swift"; sourceTree = "<group>"; };
 		0134999629043ACC00CED6BE /* RealityKitViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RealityKitViewController.swift; sourceTree = "<group>"; };
@@ -312,6 +314,7 @@
 			isa = PBXGroup;
 			children = (
 				016FABEC21C078E400AF60DC /* AppDelegate.swift */,
+				0128EEBA2ABA607A00E60976 /* EuclidMesh.swift */,
 				016FABF021C078E400AF60DC /* SceneKitViewController.swift */,
 				0134999629043ACC00CED6BE /* RealityKitViewController.swift */,
 				016FABF221C078E400AF60DC /* Main.storyboard */,
@@ -582,6 +585,7 @@
 			files = (
 				016FABF121C078E400AF60DC /* SceneKitViewController.swift in Sources */,
 				0134999729043ACC00CED6BE /* RealityKitViewController.swift in Sources */,
+				0128EEBB2ABA607A00E60976 /* EuclidMesh.swift in Sources */,
 				016FABED21C078E400AF60DC /* AppDelegate.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/Euclid.xcodeproj/xcshareddata/xcschemes/Example.xcscheme b/Euclid.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
index 4e3e0940..483cd90e 100644
--- a/Euclid.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
+++ b/Euclid.xcodeproj/xcshareddata/xcschemes/Example.xcscheme
@@ -41,7 +41,7 @@
       </Testables>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
diff --git a/Example/EuclidMesh.swift b/Example/EuclidMesh.swift
new file mode 100644
index 00000000..9cb20640
--- /dev/null
+++ b/Example/EuclidMesh.swift
@@ -0,0 +1,26 @@
+//
+//  EuclidMesh.swift
+//  Example
+//
+//  Created by Nick Lockwood on 20/09/2023.
+//  Copyright © 2023 Nick Lockwood. All rights reserved.
+//
+
+import Euclid
+import UIKit
+
+let euclidMesh: Mesh = {
+    let start = CFAbsoluteTimeGetCurrent()
+
+    // create some geometry using Euclid
+    let cube = Mesh.cube(size: 0.8, material: UIColor.red)
+    let sphere = Mesh.sphere(slices: 120, material: CGImage.checkerboard())
+    let mesh = cube.subtracting(sphere).makeWatertight()
+
+    print("Time:", CFAbsoluteTimeGetCurrent() - start)
+    print("Polygons:", mesh.polygons.count)
+    print("Triangles:", mesh.triangulate().polygons.count)
+    print("Watertight:", mesh.isWatertight)
+
+    return mesh
+}()
diff --git a/Example/RealityKitViewController.swift b/Example/RealityKitViewController.swift
index c4c1651e..732e9e8d 100644
--- a/Example/RealityKitViewController.swift
+++ b/Example/RealityKitViewController.swift
@@ -26,23 +26,13 @@ class RealityKitViewController: UIViewController {
         arView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
         view.addSubview(arView)
 
-        // create some geometry using Euclid
-        let start = CFAbsoluteTimeGetCurrent()
-        let cube = Mesh.cube(size: 0.8, material: UIColor.red)
-        let sphere = Mesh.sphere(slices: 120, material: UIColor.blue)
-        let mesh = cube.subtracting(sphere).makeWatertight()
-
-        print("Time:", CFAbsoluteTimeGetCurrent() - start)
-        print("Polygons:", mesh.polygons.count)
-        print("Triangles:", mesh.triangulate().polygons.count)
-        print("Watertight:", mesh.isWatertight)
-
         if #available(macOS 12.0, iOS 15.0, *) {
             // create ModelEntity
-            let entity = try! ModelEntity(mesh)
-            let anchor = AnchorEntity(world: .zero)
-            anchor.addChild(entity)
-            arView.scene.anchors.append(anchor)
+            if let entity = try? ModelEntity(euclidMesh) {
+                let anchor = AnchorEntity(world: .zero)
+                anchor.addChild(entity)
+                arView.scene.anchors.append(anchor)
+            }
         } else {
             let alert = UIAlertController(
                 title: "Unsupported",
diff --git a/Example/SceneKitViewController.swift b/Example/SceneKitViewController.swift
index de4e9555..c600d16a 100644
--- a/Example/SceneKitViewController.swift
+++ b/Example/SceneKitViewController.swift
@@ -25,19 +25,8 @@ class SceneKitViewController: UIViewController {
         // place the camera
         cameraNode.position = SCNVector3(x: 0, y: 0, z: 2)
 
-        // create some geometry using Euclid
-        let start = CFAbsoluteTimeGetCurrent()
-        let cube = Mesh.cube(size: 0.8, material: UIColor.red)
-        let sphere = Mesh.sphere(slices: 120, material: UIColor.blue)
-        let mesh = cube.subtracting(sphere).makeWatertight()
-
-        print("Time:", CFAbsoluteTimeGetCurrent() - start)
-        print("Polygons:", mesh.polygons.count)
-        print("Triangles:", mesh.triangulate().polygons.count)
-        print("Watertight:", mesh.isWatertight)
-
         // create SCNNode
-        let geometry = SCNGeometry(mesh)
+        let geometry = SCNGeometry(euclidMesh)
         let node = SCNNode(geometry: geometry)
         scene.rootNode.addChildNode(node)