球状に配置したボタンをポチポチ押すだけの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 ()
@property (nonatomic, weak) SCNView *sceneView;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [self color:3];
[self setupScene];
[self createButtons];
}
– (void)setupScene {
float w = CGRectGetMaxX(self.view.bounds);
SCNView *sv = [[SCNView alloc] initWithFrame:CGRectMake(0, 0, w, w)];
sv.scene = [SCNScene scene];
sv.backgroundColor = [self color:4];
[self.view addSubview:sv];
self.sceneView = sv;
[self.sceneView.scene.rootNode runAction:[SCNAction rotateByAngle:M_PI aroundAxis:SCNVector3Make(1, 0, 0) duration:30.0]];
}
– (void)createButtons {
float dangle = M_PI / 5.0;
NSMutableArray *btns = [NSMutableArray array];
for (int t=0; t<9; t++) {
for (int p =0; p<9; p++) {
SCNSphere *btn = [SCNSphere sphereWithRadius:1.2];
btn.firstMaterial.diffuse.contents = [[self color:0] colorWithAlphaComponent:0.8];
SCNNode *btnNode = [SCNNode nodeWithGeometry:btn];
btnNode.position = [self sphericalCoordinateTheata:t * dangle phi:p * dangle r:10];
btnNode.name = @”btn”;
// check distance
BOOL skip = NO;
for (SCNNode *previous in btns) {
SCNVector3 v0 = previous.position;
SCNVector3 v1 = btnNode.position;
SCNVector3 v = SCNVector3Make(v0.x – v1.x, v0.y – v1.y, v0.z – v1.z);
float d = sqrtf(v.x*v.x + v.y*v.y + v.z*v.z);
if (d < 3.0) {
skip = YES;
}
}
if (!skip) {
[self.sceneView.scene.rootNode addChildNode:btnNode];
[btns addObject:btnNode];
}
}
}
}
– (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:@”btn”]) {
SCNVector3 p = hit.position;
[hit runAction:[SCNAction sequence:@[
[SCNAction moveByX:-p.x * 0.1 y:-p.y * 0.1 z:-p.z * 0.1 duration:0.1],
[SCNAction moveTo:p duration:0.3]
]]];
hit.geometry.firstMaterial.diffuse.contents = [[self color:2] colorWithAlphaComponent:0.8];
}
}
}
– (SCNVector3)sphericalCoordinateTheata:(float)t phi:(float)p r:(float)r {
float x = r * sin(t) * cos(p);
float y = r * sin(t) * sin(p);
float z = r * cos(t);
return SCNVector3Make(x, y, z);
}
#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(0x5E0042);
case 1: return ColorHex(0x2C2233);
case 2: return ColorHex(0x005869);
case 3: return ColorHex(0x00856A);
case 4: return ColorHex(0xDFF7B9);
}
return nil;
}
@end