Rough implementation of the metaballs simulation in MetaballsKit

Metaballs.xcodeproj/project.pbxproj

@@ -12,6 +12,10 @@
 		C0BBE36F1F2E816500E68524 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = C0BBE36E1F2E816500E68524 /* Assets.xcassets */; };
 		C0BBE3721F2E816500E68524 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = C0BBE3701F2E816500E68524 /* Main.storyboard */; };
 		C0BBE37D1F2E816500E68524 /* MetaballsTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = C0BBE37C1F2E816500E68524 /* MetaballsTests.swift */; };
+		C0BBE3951F2E81B600E68524 /* MetaballsKit.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = C0BBE38C1F2E81B600E68524 /* MetaballsKit.framework */; };
+		C0BBE39A1F2E81B600E68524 /* MetaballsKitTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = C0BBE3991F2E81B600E68524 /* MetaballsKitTests.swift */; };
+		C0BBE39C1F2E81B600E68524 /* MetaballsKit.h in Headers */ = {isa = PBXBuildFile; fileRef = C0BBE38E1F2E81B600E68524 /* MetaballsKit.h */; settings = {ATTRIBUTES = (Public, ); }; };
+		C0BBE3A41F2E81C700E68524 /* Metaballs.swift in Sources */ = {isa = PBXBuildFile; fileRef = C0BBE3A31F2E81C700E68524 /* Metaballs.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -22,6 +26,13 @@
 			remoteGlobalIDString = C0BBE3661F2E816500E68524;
 			remoteInfo = Metaballs;
 		};
+		C0BBE3961F2E81B600E68524 /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = C0BBE35F1F2E816500E68524 /* Project object */;
+			proxyType = 1;
+			remoteGlobalIDString = C0BBE38B1F2E81B600E68524;
+			remoteInfo = MetaballsKit;
+		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
@@ -34,6 +45,13 @@
 		C0BBE3781F2E816500E68524 /* MetaballsTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = MetaballsTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		C0BBE37C1F2E816500E68524 /* MetaballsTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MetaballsTests.swift; sourceTree = "<group>"; };
 		C0BBE37E1F2E816500E68524 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		C0BBE38C1F2E81B600E68524 /* MetaballsKit.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = MetaballsKit.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		C0BBE38E1F2E81B600E68524 /* MetaballsKit.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MetaballsKit.h; sourceTree = "<group>"; };
+		C0BBE38F1F2E81B600E68524 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		C0BBE3941F2E81B600E68524 /* MetaballsKitTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = MetaballsKitTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		C0BBE3991F2E81B600E68524 /* MetaballsKitTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MetaballsKitTests.swift; sourceTree = "<group>"; };
+		C0BBE39B1F2E81B600E68524 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		C0BBE3A31F2E81C700E68524 /* Metaballs.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Metaballs.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -51,6 +69,21 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		C0BBE3881F2E81B600E68524 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		C0BBE3911F2E81B600E68524 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				C0BBE3951F2E81B600E68524 /* MetaballsKit.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXFrameworksBuildPhase section */
 
 /* Begin PBXGroup section */
@@ -59,6 +92,8 @@
 			children = (
 				C0BBE3691F2E816500E68524 /* Metaballs */,
 				C0BBE37B1F2E816500E68524 /* MetaballsTests */,
+				C0BBE38D1F2E81B600E68524 /* MetaballsKit */,
+				C0BBE3981F2E81B600E68524 /* MetaballsKitTests */,
 				C0BBE3681F2E816500E68524 /* Products */,
 			);
 			sourceTree = "<group>";
@@ -68,6 +103,8 @@
 			children = (
 				C0BBE3671F2E816500E68524 /* Metaballs.app */,
 				C0BBE3781F2E816500E68524 /* MetaballsTests.xctest */,
+				C0BBE38C1F2E81B600E68524 /* MetaballsKit.framework */,
+				C0BBE3941F2E81B600E68524 /* MetaballsKitTests.xctest */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -93,8 +130,38 @@
 			path = MetaballsTests;
 			sourceTree = "<group>";
 		};
+		C0BBE38D1F2E81B600E68524 /* MetaballsKit */ = {
+			isa = PBXGroup;
+			children = (
+				C0BBE38E1F2E81B600E68524 /* MetaballsKit.h */,
+				C0BBE38F1F2E81B600E68524 /* Info.plist */,
+				C0BBE3A31F2E81C700E68524 /* Metaballs.swift */,
+			);
+			path = MetaballsKit;
+			sourceTree = "<group>";
+		};
+		C0BBE3981F2E81B600E68524 /* MetaballsKitTests */ = {
+			isa = PBXGroup;
+			children = (
+				C0BBE3991F2E81B600E68524 /* MetaballsKitTests.swift */,
+				C0BBE39B1F2E81B600E68524 /* Info.plist */,
+			);
+			path = MetaballsKitTests;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
+/* Begin PBXHeadersBuildPhase section */
+		C0BBE3891F2E81B600E68524 /* Headers */ = {
+			isa = PBXHeadersBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				C0BBE39C1F2E81B600E68524 /* MetaballsKit.h in Headers */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXHeadersBuildPhase section */
+
 /* Begin PBXNativeTarget section */
 		C0BBE3661F2E816500E68524 /* Metaballs */ = {
 			isa = PBXNativeTarget;
@@ -131,6 +198,42 @@
 			productReference = C0BBE3781F2E816500E68524 /* MetaballsTests.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
 		};
+		C0BBE38B1F2E81B600E68524 /* MetaballsKit */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = C0BBE39D1F2E81B600E68524 /* Build configuration list for PBXNativeTarget "MetaballsKit" */;
+			buildPhases = (
+				C0BBE3871F2E81B600E68524 /* Sources */,
+				C0BBE3881F2E81B600E68524 /* Frameworks */,
+				C0BBE3891F2E81B600E68524 /* Headers */,
+				C0BBE38A1F2E81B600E68524 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = MetaballsKit;
+			productName = MetaballsKit;
+			productReference = C0BBE38C1F2E81B600E68524 /* MetaballsKit.framework */;
+			productType = "com.apple.product-type.framework";
+		};
+		C0BBE3931F2E81B600E68524 /* MetaballsKitTests */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = C0BBE3A01F2E81B600E68524 /* Build configuration list for PBXNativeTarget "MetaballsKitTests" */;
+			buildPhases = (
+				C0BBE3901F2E81B600E68524 /* Sources */,
+				C0BBE3911F2E81B600E68524 /* Frameworks */,
+				C0BBE3921F2E81B600E68524 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+				C0BBE3971F2E81B600E68524 /* PBXTargetDependency */,
+			);
+			name = MetaballsKitTests;
+			productName = MetaballsKitTests;
+			productReference = C0BBE3941F2E81B600E68524 /* MetaballsKitTests.xctest */;
+			productType = "com.apple.product-type.bundle.unit-test";
+		};
 /* End PBXNativeTarget section */
 
 /* Begin PBXProject section */
@@ -152,6 +255,17 @@
 						ProvisioningStyle = Automatic;
 						TestTargetID = C0BBE3661F2E816500E68524;
 					};
+					C0BBE38B1F2E81B600E68524 = {
+						CreatedOnToolsVersion = 8.3.3;
+						DevelopmentTeam = 78372RE6B4;
+						LastSwiftMigration = 0830;
+						ProvisioningStyle = Automatic;
+					};
+					C0BBE3931F2E81B600E68524 = {
+						CreatedOnToolsVersion = 8.3.3;
+						DevelopmentTeam = 78372RE6B4;
+						ProvisioningStyle = Automatic;
+					};
 				};
 			};
 			buildConfigurationList = C0BBE3621F2E816500E68524 /* Build configuration list for PBXProject "Metaballs" */;
@@ -169,6 +283,8 @@
 			targets = (
 				C0BBE3661F2E816500E68524 /* Metaballs */,
 				C0BBE3771F2E816500E68524 /* MetaballsTests */,
+				C0BBE38B1F2E81B600E68524 /* MetaballsKit */,
+				C0BBE3931F2E81B600E68524 /* MetaballsKitTests */,
 			);
 		};
 /* End PBXProject section */
@@ -190,6 +306,20 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		C0BBE38A1F2E81B600E68524 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		C0BBE3921F2E81B600E68524 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXResourcesBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -210,6 +340,22 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
+		C0BBE3871F2E81B600E68524 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				C0BBE3A41F2E81C700E68524 /* Metaballs.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+		C0BBE3901F2E81B600E68524 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				C0BBE39A1F2E81B600E68524 /* MetaballsKitTests.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
 /* End PBXSourcesBuildPhase section */
 
 /* Begin PBXTargetDependency section */
@@ -218,6 +364,11 @@
 			target = C0BBE3661F2E816500E68524 /* Metaballs */;
 			targetProxy = C0BBE3791F2E816500E68524 /* PBXContainerItemProxy */;
 		};
+		C0BBE3971F2E81B600E68524 /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			target = C0BBE38B1F2E81B600E68524 /* MetaballsKit */;
+			targetProxy = C0BBE3961F2E81B600E68524 /* PBXContainerItemProxy */;
+		};
 /* End PBXTargetDependency section */
 
 /* Begin PBXVariantGroup section */
@@ -384,6 +535,85 @@
 			};
 			name = Release;
 		};
+		C0BBE39E1F2E81B600E68524 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "";
+				COMBINE_HIDPI_IMAGES = YES;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = 78372RE6B4;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				FRAMEWORK_VERSION = A;
+				INFOPLIST_FILE = MetaballsKit/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = me.erynwells.MetaballsKit;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 3.0;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Debug;
+		};
+		C0BBE39F1F2E81B600E68524 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				CLANG_ENABLE_MODULES = YES;
+				CODE_SIGN_IDENTITY = "";
+				COMBINE_HIDPI_IMAGES = YES;
+				CURRENT_PROJECT_VERSION = 1;
+				DEFINES_MODULE = YES;
+				DEVELOPMENT_TEAM = 78372RE6B4;
+				DYLIB_COMPATIBILITY_VERSION = 1;
+				DYLIB_CURRENT_VERSION = 1;
+				DYLIB_INSTALL_NAME_BASE = "@rpath";
+				FRAMEWORK_VERSION = A;
+				INFOPLIST_FILE = MetaballsKit/Info.plist;
+				INSTALL_PATH = "$(LOCAL_LIBRARY_DIR)/Frameworks";
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = me.erynwells.MetaballsKit;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 3.0;
+				VERSIONING_SYSTEM = "apple-generic";
+				VERSION_INFO_PREFIX = "";
+			};
+			name = Release;
+		};
+		C0BBE3A11F2E81B600E68524 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				COMBINE_HIDPI_IMAGES = YES;
+				DEVELOPMENT_TEAM = 78372RE6B4;
+				INFOPLIST_FILE = MetaballsKitTests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = me.erynwells.MetaballsKitTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
+			};
+			name = Debug;
+		};
+		C0BBE3A21F2E81B600E68524 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
+				COMBINE_HIDPI_IMAGES = YES;
+				DEVELOPMENT_TEAM = 78372RE6B4;
+				INFOPLIST_FILE = MetaballsKitTests/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/../Frameworks @loader_path/../Frameworks";
+				PRODUCT_BUNDLE_IDENTIFIER = me.erynwells.MetaballsKitTests;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 3.0;
+			};
+			name = Release;
+		};
 /* End XCBuildConfiguration section */
 
 /* Begin XCConfigurationList section */
@@ -412,6 +642,22 @@
 			);
 			defaultConfigurationIsVisible = 0;
 		};
+		C0BBE39D1F2E81B600E68524 /* Build configuration list for PBXNativeTarget "MetaballsKit" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				C0BBE39E1F2E81B600E68524 /* Debug */,
+				C0BBE39F1F2E81B600E68524 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+		};
+		C0BBE3A01F2E81B600E68524 /* Build configuration list for PBXNativeTarget "MetaballsKitTests" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				C0BBE3A11F2E81B600E68524 /* Debug */,
+				C0BBE3A21F2E81B600E68524 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+		};
 /* End XCConfigurationList section */
 	};
 	rootObject = C0BBE35F1F2E816500E68524 /* Project object */;

MetaballsKit/Info.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>$(CURRENT_PROJECT_VERSION)</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>Copyright © 2017 Eryn Wells. All rights reserved.</string>
+	<key>NSPrincipalClass</key>
+	<string></string>
+</dict>
+</plist>

MetaballsKit/Metaballs.swift

@@ -0,0 +1,78 @@
+//
+//  Metaballs.swift
+//  Metaballs
+//
+//  Created by Eryn Wells on 7/30/17.
+//  Copyright © 2017 Eryn Wells. All rights reserved.
+//
+
+import Foundation
+
+public struct Ball {
+    let radius: CGFloat
+    var position = CGPoint()
+    var velocity = CGVector()
+
+    internal var bounds: CGRect {
+        let diameter = radius * 2
+        return CGRect(x: position.x - radius, y: position.y - radius, width: diameter, height: diameter)
+    }
+
+    init(radius r: CGFloat) {
+        radius = r
+    }
+
+    internal mutating func update() {
+        position.x += velocity.dx
+        position.y += velocity.dy
+    }
+}
+
+public struct Field {
+    var size: CGSize
+    private(set) var balls = [Ball]()
+
+    internal var bounds: CGRect {
+        return CGRect(origin: CGPoint(), size: size)
+    }
+
+    init(size s: CGSize) {
+        size = s
+    }
+
+    public func update() {
+        let selfBounds = bounds
+        for var ball in balls {
+            // Update position of ball.
+            ball.update()
+
+            if !selfBounds.contains(ball.position) {
+                // Degenerate case. If the ball finds itself outside the bounds of the field, plop it back in the center.
+                ball.position = CGPoint(x: selfBounds.midX, y: selfBounds.midY)
+            } else {
+                // Do collision detection with walls.
+                let ballBounds = ball.bounds
+                if !selfBounds.contains(ballBounds) {
+                    if ballBounds.minX < selfBounds.minX || ballBounds.maxX > selfBounds.maxX {
+                        ball.velocity.dx *= -1
+                    }
+                    if ballBounds.minY < selfBounds.minY || ballBounds.maxY > selfBounds.maxY {
+                        ball.velocity.dy *= -1
+                    }
+                }
+            }
+        }
+    }
+
+    public func sample(at point: CGPoint) throws -> CGFloat {
+        return 0.0
+    }
+
+    public mutating func add(ball: Ball) throws {
+        guard bounds.contains(ball.bounds) else {
+            /// TODO: Throw an error.
+            return
+        }
+        balls.append(ball)
+    }
+}

MetaballsKit/MetaballsKit.h

@@ -0,0 +1,19 @@
+//
+//  MetaballsKit.h
+//  MetaballsKit
+//
+//  Created by Eryn Wells on 7/30/17.
+//  Copyright © 2017 Eryn Wells. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+//! Project version number for MetaballsKit.
+FOUNDATION_EXPORT double MetaballsKitVersionNumber;
+
+//! Project version string for MetaballsKit.
+FOUNDATION_EXPORT const unsigned char MetaballsKitVersionString[];
+
+// In this header, you should import all the public headers of your framework using statements like #import <MetaballsKit/PublicHeader.h>
+
+

MetaballsKitTests/Info.plist

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>BNDL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+</dict>
+</plist>

MetaballsKitTests/MetaballsKitTests.swift

@@ -0,0 +1,36 @@
+//
+//  MetaballsKitTests.swift
+//  MetaballsKitTests
+//
+//  Created by Eryn Wells on 7/30/17.
+//  Copyright © 2017 Eryn Wells. All rights reserved.
+//
+
+import XCTest
+@testable import MetaballsKit
+
+class MetaballsKitTests: XCTestCase {
+    
+    override func setUp() {
+        super.setUp()
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+    
+    override func tearDown() {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+        super.tearDown()
+    }
+    
+    func testExample() {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    }
+    
+    func testPerformanceExample() {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+    
+}