７つの箱をタップして色をそろえるiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
@import SceneKit;
@interface ViewController ()
@property (nonatomic, weak) SCNView *sceneView;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
[self setupScene];
[self createSevenBox];
[self createCamera];
}
– (void)setupScene {
SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];
sv.backgroundColor = [self color:0];
sv.scene = [SCNScene scene];
sv.allowsCameraControl = YES;
sv.autoenablesDefaultLighting = YES;
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createSevenBox {
float l = 10;
SCNVector3 points[] = {
SCNVector3Make(0, 0, 0),
SCNVector3Make(l, 0, 0),
SCNVector3Make(-l, 0, 0),
SCNVector3Make(0, l, 0),
SCNVector3Make(0, -l, 0),
SCNVector3Make(0, 0, l),
SCNVector3Make(0, 0, -l),
};
float s = l * 0.6;
for (int i=0; i<7; i++) {
SCNBox *box = [SCNBox boxWithWidth:s height:s length:s chamferRadius:0.1];
box.firstMaterial.diffuse.contents = (i==6) ? [self color:2] : [self color:4];
box.firstMaterial.specular.contents = [self color:1];
SCNNode *boxNode = [SCNNode nodeWithGeometry:box];
boxNode.name = (i==6) ? @”on” : @”off”;
boxNode.position = points[i];
[self.sceneView.scene.rootNode addChildNode:boxNode];
}
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.position = SCNVector3Make(0, 0, 60);
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInView:self.sceneView];
// x y z +-
void (^setupNode)(SCNNode *n) = ^(SCNNode *n){
SCNMaterial *material = [SCNMaterial material];
material.specular.contents = [self color:1];
if ([n.name isEqual:@”on”]) {
n.name = @”off”;
material.diffuse.contents = [self color:4];
} else {
n.name = @”on”;
material.diffuse.contents = [self color:2];
}
n.geometry.firstMaterial = material;
};
SCNNode *hit = [[self.sceneView hitTest:p options:@{SCNHitTestSortResultsKey:@YES}].firstObject node];
if (!hit) return;
else setupNode(hit);
[self.sceneView.scene.rootNode.childNodes enumerateObjectsUsingBlock:^(SCNNode *n, NSUInteger idx, BOOL *stop) {
float dx = fabs(n.position.x – hit.position.x);
float dy = fabs(n.position.y – hit.position.y);
float dz = fabs(n.position.z – hit.position.z);
if ((dx == 10 && dy == 0 && dz == 0)
|| (dx == 0 && dy == 10 && dz == 0)
|| (dx == 0 && dy == 0 && dz == 10)
) {
setupNode(n);
}
}];
}
#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 > 3) return nil;
int colorCode[] = {0xFFE261, 0xFFFAF4, 0x040014, 0xDEFDFF};
return ColorHex(colorCode[i]);
}
@end