箱をくるっとして矢印を表示する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 createCube];
[self createCamera];
}
– (void)setupScene {
SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];
sv.backgroundColor = [UIColor greenColor];
sv.scene = [SCNScene scene];
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createCube {
int colorSetting[9][6] = {
{0,0,0,1,0,0},
{0,0,0,0,0,0},
{0,1,0,0,0,0},
{0,1,0,1,0,0},
{0,1,0,1,0,0},
{0,1,0,1,0,0},
{0,0,0,1,0,0},
{0,0,0,0,0,0},
{0,1,0,0,0,0}
};
for (int i=0; i<9; i++) {
float x = (i % 3);
float y = (i / 3);
SCNBox *box = [SCNBox boxWithWidth:0.8 height:0.8 length:0.8 chamferRadius:0];
NSMutableArray *materials = [NSMutableArray array];
for (int j=0;j<6;j++) {
SCNMaterial *m = [SCNMaterial material];
m.diffuse.contents = colorSetting[i][j] == 0 ? [UIColor whiteColor] : [UIColor blackColor];
[materials addObject:m];
}
box.materials = materials;
SCNNode *boxNode = [SCNNode nodeWithGeometry:box];
boxNode.name = [NSString stringWithFormat:@”box %d”, i];
boxNode.position = SCNVector3Make(x, y, 0);
[self.sceneView.scene.rootNode addChildNode:boxNode];
}
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.camera.usesOrthographicProjection = YES;
camera.camera.orthographicScale = 2;
camera.position = SCNVector3Make(1, 0, 7);
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
CGPoint p = [[touches anyObject] locationInView:self.sceneView];
SCNHitTestResult *hit = [self.sceneView hitTest:p options:@{SCNHitTestSortResultsKey : @YES}].firstObject;
if ([hit.node.name isEqual:@”box 5″]) {
[self.sceneView.scene.rootNode enumerateChildNodesUsingBlock:^(SCNNode *child, BOOL *stop) {
if ([child.name hasPrefix:@”box”]) {
[child runAction:[SCNAction sequence:@[[SCNAction rotateToX:0 y:0 z:0 duration:1.0], [SCNAction rotateToX:0 y:-M_PI * 0.5 z:0 duration:0.2]]]];
}
}];
} else if ([hit.node.name isEqual:@”box 3″]) {
[self.sceneView.scene.rootNode enumerateChildNodesUsingBlock:^(SCNNode *child, BOOL *stop) {
if ([child.name hasPrefix:@”box”]) {
[child runAction:[SCNAction sequence:@[[SCNAction rotateToX:0 y:0 z:0 duration:1.0], [SCNAction rotateToX:0 y:M_PI * 0.5 z:0 duration:0.2]]]];
}
}];
}
}
@end