ボタンを押すとリングが飛び出るiPhoneアプリのサンプルコードを書いてみます。
#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 createPopupButton];
[self createCamera];
[self createLight];
}
– (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:0];
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createPopupButton {
SCNBox *box = [SCNBox boxWithWidth:40 height:2 length:64 chamferRadius:1];
box.firstMaterial.diffuse.contents = [self color:1];
SCNNode *boxNode = [SCNNode nodeWithGeometry:box];
[self.sceneView.scene.rootNode addChildNode:boxNode];
SCNCylinder *btn = [SCNCylinder cylinderWithRadius:8 height:0.1];
btn.firstMaterial.diffuse.contents = [self color:2];
SCNNode *btnNode = [SCNNode nodeWithGeometry:btn];
btnNode.name = @”popbtn”;
btnNode.position = SCNVector3Make(0, 2.5, –10);
[boxNode addChildNode:btnNode];
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.camera.automaticallyAdjustsZRange = YES;
camera.position = SCNVector3Make(5, 35, 80);
camera.rotation = SCNVector4Make(0.5, 0, –0.4, –0.4);
[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, 40, 20);
lightNode.rotation = SCNVector4Make(1, 0, 0, –0.4);
[self.sceneView.scene.rootNode addChildNode:lightNode];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
CGPoint p = [[touches anyObject] locationInView:self.sceneView];
SCNNode *hit = [[self.sceneView hitTest:p options:@{SCNHitTestSortResultsKey:@YES}].firstObject node];
if ([hit.name isEqual:@”popbtn”]) {
for (int i=0; i<5; i++) {
SCNTube *ring = [SCNTube tubeWithInnerRadius:6.5 outerRadius:8 height:0.1];
ring.firstMaterial.diffuse.contents = [[self color:4] colorWithAlphaComponent:0.8];
SCNNode *ringNode = [SCNNode nodeWithGeometry:ring];
ringNode.position = hit.position;
[self.sceneView.scene.rootNode addChildNode:ringNode];
[self animationRing:ringNode cnt:i];
}
}
}
– (void)animationRing:(SCNNode *)ring cnt:(int)i {
[ring runAction:
[SCNAction group:@[
[SCNAction moveBy:SCNVector3Make(0, 6, 0) duration:0.2],
[SCNAction scaleBy:1.1 duration:0.18]
]
] completionHandler:^{
int next = i – 1;
if (next < 0) {
[ring runAction:[SCNAction sequence:@[
[SCNAction fadeOutWithDuration:2],
[SCNAction runBlock:^(SCNNode *node) { [ring removeFromParentNode]; }]]]];
} else {
[self animationRing:ring cnt:next];
}
}];
}
#define ColorHex(rgb) [UIColor colorWithRed:((rgb & 0xFF0000) >> 16)/255.0 green:((rgb & 0xFF00) >> 8)/255.0 blue:(rgb & 0xFF) /255.0 alpha:1]
– (UIColor *)color:(int)i {
switch (i) {
case 0 : return ColorHex(0x211426);
case 1 : return ColorHex(0x413659);
case 2 : return ColorHex(0x656F8C);
case 3 : return ColorHex(0x9BBFAB);
case 4 : return ColorHex(0xF2EFDF);
}
return nil;
}
@end