円盤の３段重ねなタイマーを動かす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 ()
@property (nonatomic, weak) SCNView *sceneView;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
[self setupScene];
[self createDisk];
[self createCamera];
}
– (void)setupScene {
SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];
sv.backgroundColor = [self color:0];
sv.scene = [SCNScene scene];
sv.autoenablesDefaultLighting = YES;
sv.allowsCameraControl = YES;
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createDisk {
for (int i=0; i<3; i++) {
SCNCylinder *c = [SCNCylinder cylinderWithRadius:10 height:3];
c.firstMaterial.diffuse.contents = [self color:1];
SCNNode *cn = [SCNNode nodeWithGeometry:c];
cn.name = [NSString stringWithFormat:@”timer%d”, i];
cn.position = SCNVector3Make(0, 3.1 * i, 0);
[self.sceneView.scene.rootNode addChildNode:cn];
SCNBox *redLine = [SCNBox boxWithWidth:0.2 height:2 length:0.1 chamferRadius:0.4];
redLine.firstMaterial.diffuse.contents = [self color:2];
SCNNode *redLineNode = [SCNNode nodeWithGeometry:redLine];
redLineNode.position = SCNVector3Make(0, –0.6, 10.1);
[cn addChildNode:redLineNode];
for (int i=0; i<60; i++) {
float x = 10.05 * cos(i * M_PI / 30.0);
float z = 10.05 * sin(i * M_PI / 30.0);
SCNBox *dot = [SCNBox boxWithWidth:0.1 height:0.3 length:0.1 chamferRadius:0];
dot.firstMaterial.diffuse.contents = [self color:3];
SCNNode *dotNode = [SCNNode nodeWithGeometry:dot];
dotNode.position = SCNVector3Make(x, 1.2, z);
[cn addChildNode:dotNode];
}
[cn runAction:[SCNAction rotateByAngle:i * M_PI / 5.0 aroundAxis:SCNVector3Make(0, 1, 0) duration:0.4]];
}
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.position = SCNVector3Make(0, 15, 60);
camera.rotation = SCNVector4Make(1, 0, 0, –0.2);
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
SCNNode *top = [self.sceneView.scene.rootNode childNodeWithName:@”timer2″ recursively:NO];
SCNNode *mid = [self.sceneView.scene.rootNode childNodeWithName:@”timer1″ recursively:NO];
[top runAction:[SCNAction rotateToX:0 y:0 z:0 duration:60.0 * top.rotation.w / (2.0 * M_PI)] completionHandler:^{
SCNSphere *s = [SCNSphere sphereWithRadius:5];
s.firstMaterial.diffuse.contents = [self color:4];
SCNNode *sn = [SCNNode nodeWithGeometry:s];
[self.sceneView.scene.rootNode addChildNode:sn];
sn.physicsBody = [SCNPhysicsBody dynamicBody];
[sn.physicsBody applyForce:SCNVector3Make(0, 20, 0) impulse:YES];
}];
[mid runAction:[SCNAction rotateToX:0 y:0 z:0 duration:60.0 * mid.rotation.w / (2.0 * M_PI)] completionHandler:^{
SCNSphere *s = [SCNSphere sphereWithRadius:3];
s.firstMaterial.diffuse.contents = [self color:4];
SCNNode *sn = [SCNNode nodeWithGeometry:s];
[self.sceneView.scene.rootNode addChildNode:sn];
sn.physicsBody = [SCNPhysicsBody dynamicBody];
[sn.physicsBody applyForce:SCNVector3Make(0, 20, 0) impulse:YES];
}];
}
#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 {
if (i > 4) return nil;
int colorCode[] = {0x2F343B, 0x7E827A, 0x703030, 0xE3CDA4, 0xC77966};
return ColorHex(colorCode[i]);
}
@end