SceneKitで６色のキューブを表示する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) SCNScene *scene;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
SCNView *sceneView = [[SCNView alloc] initWithFrame:CGRectMake(0, 0, 300, 300)];
sceneView.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.bounds));
sceneView.backgroundColor = [UIColor orangeColor];
[self.view addSubview:sceneView];
SCNScene *scene = [SCNScene scene];
sceneView.scene = scene;
self.scene = scene;
float s = 10;
SCNBox *box =[SCNBox boxWithWidth:s height:s length:s chamferRadius:0.1];
NSMutableArray *materials = [@[] mutableCopy];
NSArray *parts = @[[self imageWithColor:[UIColor redColor]],
[self imageWithColor:[UIColor blueColor]],
[self imageWithColor:[UIColor greenColor]],
[self imageWithColor:[UIColor purpleColor]],
[self imageWithColor:[UIColor brownColor]],
[self imageWithColor:[UIColor yellowColor]]];
for (id part in parts) {
SCNMaterial *material = [SCNMaterial material];
material.diffuse.contents = part;
[materials addObject:material];
}
SCNNode *cube = [SCNNode node];
cube.name = @”cube”;
cube.geometry = box;
cube.geometry.materials = materials;
[scene.rootNode addChildNode:cube];
SCNNode *cameraNode = [SCNNode node];
cameraNode.camera = [SCNCamera camera];;
cameraNode.position = SCNVector3Make(0, 0, 40);
[scene.rootNode addChildNode:cameraNode];
UILabel *title = [[UILabel alloc] init];
title.text = @”Cube Rotation”;
title.textColor = [UIColor whiteColor];
[title sizeToFit];
title.center = CGPointMake(CGRectGetMidX(self.view.bounds), CGRectGetMidY(self.view.frame) + 100);
[self.view addSubview:title];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
SCNNode *cube = [self.scene.rootNode childNodeWithName:@”cube” recursively:NO];
[SCNTransaction begin];
[SCNTransaction setAnimationDuration:0.5];
cube.transform = SCNMatrix4Rotate(cube.transform, M_PI/3.0, 0, 1, 0.4);
[SCNTransaction commit];
}
– (UIImage *)imageWithColor:(UIColor *)color
{
CGRect rect = CGRectMake(0, 0, 1, 1);
UIGraphicsBeginImageContext(rect.size);
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(ctx, color.CGColor);
CGContextFillRect(ctx, rect);
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return img;
}
– (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
@end