十角タイマー

十角に数字をふってくるくるまわすタイマーのiPhoneアプリのサンプルコードを描いてみます。

#import “ViewController.h”

@import SceneKit;

@interface ViewController () <SCNSceneRendererDelegate>

@property (nonatomic, weak) SCNView *sceneView;

@property (nonatomic) BOOL stop;

@property (nonatomic) NSTimeInterval interval;

@property (nonatomic, strong) NSMutableArray *decagons;

@end

@implementation ViewController

– (void)viewDidLoad {

[super viewDidLoad];

self.view.backgroundColor = [UIColor colorWithHue:0.1 saturation:0.4 brightness:0.4 alpha:1];

self.stop = YES;

[self setupScene];

[self createCamera];

[self createTimer];

[self createLight];

[self createButton];

}

– (void)setupScene {

float w = CGRectGetMaxX(self.view.bounds);

SCNView *sceneView = [[SCNView alloc] initWithFrame:CGRectMake(0, 120, w, w)];

sceneView.backgroundColor = [UIColor colorWithHue:0.1 saturation:0.3 brightness:1 alpha:1];

sceneView.scene = [SCNScene scene];

[self.view addSubview:sceneView];

self.sceneView = sceneView;

self.sceneView.delegate = self;

}

– (void)createTimer {

self.decagons = [NSMutableArray array];

for (int i=0; i<3; i++) {

float r = 30;

float l = r * (cos(2.0 * M_PI/5.0) – cos(3.0 * M_PI/5.0));

SCNNode *decagon = [self createDecagonAtPoint:SCNVector3Make((i-1) * l, 0, 0)];

[self.decagons addObject:decagon];

}

– (SCNNode *)createDecagonAtPoint:(SCNVector3)p {

float r = 30;

float l = r * (cos(2.0 * M_PI/5.0) – cos(3.0 * M_PI/5.0));

float l2 = 2.0 * r * cos(M_PI/10.0);

SCNNode *decagon = [SCNNode node];

for (int i=0; i<5; i++) {

SCNBox *box = [SCNBox boxWithWidth:l height:l length:l2 chamferRadius:0];

box.firstMaterial.diffuse.contents = [UIColor colorWithHue:0.9 saturation:0.2 brightness:0.6 alpha:1];

SCNNode *boxNode = [SCNNode nodeWithGeometry:box];

SCNText *front = [SCNText textWithString:[NSString stringWithFormat:@”%d”, i] extrusionDepth:0.5];

SCNNode *frontNode = [SCNNode nodeWithGeometry:front];

frontNode.position = SCNVector3Make(-l/6.0, -l/3.0, l2/2.0);

[boxNode addChildNode:frontNode];

SCNText *back = [SCNText textWithString:[NSString stringWithFormat:@”%d”, i+5] extrusionDepth:0.5];

SCNNode *backNode = [SCNNode nodeWithGeometry:back];

backNode.transform = SCNMatrix4Rotate(backNode.transform, M_PI, 0, 1, 0);

backNode.transform = SCNMatrix4Rotate(backNode.transform, M_PI, 0, 0, 1);

backNode.position = SCNVector3Make(-l/6.0, l/3.0, -l2/2.0);

[boxNode addChildNode:backNode];

for (int j=0; j<i; j++) {

boxNode.transform = SCNMatrix4Rotate(boxNode.transform, M_PI/5.0, 1, 0, 0);

}

decagon.position = p;

[decagon addChildNode:boxNode];

}

[self.sceneView.scene.rootNode addChildNode:decagon];

return decagon;

}

– (void)createCamera {

SCNNode *camera = [SCNNode node];

camera.camera = [SCNCamera camera];

camera.position = SCNVector3Make(0, 0, 100);

[self.sceneView.scene.rootNode addChildNode:camera];

}

– (void)createLight {

SCNLight *light = [SCNLight light];

light.type = SCNLightTypeOmni;

SCNNode *lightNode = [SCNNode node];

lightNode.light = light;

lightNode.position = SCNVector3Make(0, 10, 150);

[self.sceneView.scene.rootNode addChildNode:lightNode];

}

– (void)createButton {

UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];

btn.titleLabel.font = [UIFont boldSystemFontOfSize:40];

[btn setTitle:@”Run” forState:UIControlStateNormal];

[btn sizeToFit];

btn.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds)+ 180);

[self.view addSubview:btn];

[btn addTarget:self action:@selector(tapButton:) forControlEvents:UIControlEventTouchUpInside];

}

– (void)renderer:(id<SCNSceneRenderer>)aRenderer updateAtTime:(NSTimeInterval)time {

if (self.stop)

return;

if (self.interval == 0) {

self.interval = time;

return;

}

float t = time – self.interval;

float ten = floor(t / 10.0);

float one = floor(t – ten * 10.0);

float first = t – ten * 10.0 – one;

SCNNode *decagon = self.decagons[2];