まわっているコインをタッチして集めるiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
@import SceneKit;
@import SpriteKit;
@interface ViewController ()
@property (nonatomic, weak) SCNView *sceneView;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor grayColor];
[self setupScene];
[self createGround];
[self createCamera];
[self createCounter];
[self startTimer];
}
– (void)setupScene {
float w = CGRectGetMaxX(self.view.bounds);
SCNView *sv = [[SCNView alloc] initWithFrame:CGRectMake(0, 0, w, w)];
sv.backgroundColor = [self color:4];
sv.scene = [SCNScene scene];
sv.overlaySKScene = [SKScene sceneWithSize:sv.frame.size];
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createGround {
SCNBox *ground = [SCNBox boxWithWidth:40 height:1 length:40 chamferRadius:0];
ground.firstMaterial.diffuse.contents = [UIColor lightGrayColor];
SCNNode *groundNode = [SCNNode nodeWithGeometry:ground];
groundNode.name = @”ground”;
[self.sceneView.scene.rootNode addChildNode:groundNode];
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.position = SCNVector3Make(0, 20, 50);
camera.constraints = @[[SCNLookAtConstraint lookAtConstraintWithTarget:[self.sceneView.scene.rootNode childNodeWithName:@”ground” recursively:NO]]];
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)createCounter {
float w = CGRectGetMaxX(self.view.bounds) / 4.0;
for (int i=0; i < 4; i++) {
SKSpriteNode *box = [SKSpriteNode spriteNodeWithColor:[self color:i] size:CGSizeMake(w, w)];
box.name = [NSString stringWithFormat:@”box%d”, i];
box.position = CGPointMake(i * w + w/2.0, w/2.0);
[self.sceneView.overlaySKScene addChild:box];
SKLabelNode *l = [SKLabelNode labelNodeWithText:[NSString stringWithFormat:@”%d”, 0]];
l.name = @”numberLabel”;
l.verticalAlignmentMode = SKLabelVerticalAlignmentModeCenter;
l.fontSize = 50;
[box addChild:l];
}
}
– (void)startTimer {
[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(tick) userInfo:nil repeats:YES];
}
– (void)tick {
float x = arc4random() % 40 – 20.0;
float z = arc4random() % 40 – 20.0;
SCNCylinder *coin = [SCNCylinder cylinderWithRadius:2 height:0.5];
int colorIdx = arc4random() % 4;
coin.firstMaterial.diffuse.contents = [self color:colorIdx];
SCNNode *coinNode = [SCNNode nodeWithGeometry:coin];
coinNode.name = [NSString stringWithFormat:@”coin%d”, colorIdx];
coinNode.position = SCNVector3Make(x, 5, z);
coinNode.rotation = SCNVector4Make(1, 0, 0, M_PI/2.0);
coinNode.transform = SCNMatrix4Scale(coinNode.transform, 1, 1, 1.4);
[self.sceneView.scene.rootNode addChildNode:coinNode];
[coinNode runAction:[SCNAction rotateByAngle:M_PI aroundAxis:SCNVector3Make(0, 1, 0) duration:1.0]];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInView:self.sceneView];
NSArray *hits = [self.sceneView hitTest:p options:@{SCNHitTestSortResultsKey : @YES}];
if (hits.count > 0) {
SCNNode *hit = [hits.firstObject node];
if ([hit.name hasPrefix:@”coin”]) {
SKNode *counterBox = [self.sceneView.overlaySKScene childNodeWithName:[NSString stringWithFormat:@”box%@”, [hit.name substringFromIndex:4]]];
SKLabelNode *l = (SKLabelNode *)[counterBox childNodeWithName:@”numberLabel”];
l.text = [NSString stringWithFormat:@”%d”, [l.text intValue] + 1];
[hit removeAllActions];
[hit runAction:[SCNAction moveByX:0 y:5 z:0 duration:0.2] completionHandler:^{
[hit removeFromParentNode];
}];
}
}
}
#define ColorHex(rgb) [UIColor colorWithRed:((rgb & 0xFF0000) >> 16) / 255.0 green:((rgb & 0xFF00) >> 8) / 255.0 blue:(rgb & 0xFF) / 255.0 alpha:1.0]
– (UIColor *)color:(int)i {
switch (i) {
case 0 : return ColorHex(0xC8385A);
case 1 : return ColorHex(0xFFCF48);
case 2 : return ColorHex(0x1FCECB);
case 3 : return ColorHex(0x1CA9C9);
case 4 : return ColorHex(0xECEABE);
default:
break;
}
return nil;
}
@end