ドミノを倒して旗を立てる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.view.backgroundColor = [self color:1];
[self setupScene];
[self createBar];
[self createFlag];
[self createDomino];
[self createCamera];
}
– (void)setupScene {
float w = CGRectGetMaxX(self.view.bounds);
SCNView *sv = [[SCNView alloc] initWithFrame:CGRectMake(0, 0, w, w)];
sv.backgroundColor = [self color:0];
sv.scene = [SCNScene scene];
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createBar {
SCNBox *box = [SCNBox boxWithWidth:30 height:2 length:10 chamferRadius:0];
box.firstMaterial.diffuse.contents = [self color:2];
SCNNode *boxNode = [SCNNode nodeWithGeometry:box];
boxNode.position = SCNVector3Make(15, 10, 0);
[self.sceneView.scene.rootNode addChildNode:boxNode];
boxNode.physicsBody = [SCNPhysicsBody staticBody];
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.position = SCNVector3Make(0, 0, 80);
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)createFlag {
for (int i=0; i<3; i++) {
SCNBox *box = nil;
SCNNode *boxNode = nil;
if (i < 2) {
box = [SCNBox boxWithWidth:25 height:5 length:10 chamferRadius:0];
boxNode = [SCNNode nodeWithGeometry:box];
boxNode.position = SCNVector3Make(10 – 30 * i, –20, 0);
} else {
box = [SCNBox boxWithWidth:50 height:1 length:8 chamferRadius:0];
boxNode = [SCNNode nodeWithGeometry:box];
boxNode.position = SCNVector3Make(-5, –24, 0);
}
box.firstMaterial.diffuse.contents = [self color:3];
boxNode.physicsBody = [SCNPhysicsBody staticBody];
[self.sceneView.scene.rootNode addChildNode:boxNode];
}
SCNCylinder *pole = [SCNCylinder cylinderWithRadius:0.5 height:20];
pole.firstMaterial.diffuse.contents = [self color:4];
SCNNode *poleNode = [SCNNode nodeWithGeometry:pole];
poleNode.position = SCNVector3Make(-13, –15, 0);
poleNode.rotation = SCNVector4Make(0, 0, 1, M_PI/2.0);
poleNode.physicsBody = [SCNPhysicsBody dynamicBody];
poleNode.physicsBody.velocityFactor = SCNVector3Make(1, 1, 0);
poleNode.physicsBody.angularVelocityFactor = SCNVector3Make(0, 0, 1);
[self.sceneView.scene.rootNode addChildNode:poleNode];
SCNBox *flag = [SCNBox boxWithWidth:5 height:5 length:0.2 chamferRadius:0];
flag.firstMaterial.diffuse.contents = [self color:1];
SCNNode *flagNode = [SCNNode nodeWithGeometry:flag];
flagNode.position = SCNVector3Make(2.5, 7.5, 0);
[poleNode addChildNode:flagNode];
}
– (void)createDomino {
for (int i=0; i<6; i++) {
SCNBox *domino = [SCNBox boxWithWidth:1.5 height:6.4 length:4 chamferRadius:0];
domino.firstMaterial.diffuse.contents = [self color:1];
SCNNode *dominoNode = [SCNNode nodeWithGeometry:domino];
dominoNode.name = [NSString stringWithFormat:@”domino%d”, i];
dominoNode.position = SCNVector3Make(i * 5 + 3, 15, 0);
dominoNode.physicsBody = [SCNPhysicsBody dynamicBody];
dominoNode.physicsBody.mass = 40.0;
[self.sceneView.scene.rootNode addChildNode:dominoNode];
}
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
SCNNode *domino = [self.sceneView.scene.rootNode childNodeWithName:@”domino5″ recursively:NO];
[domino.physicsBody applyForce:SCNVector3Make(-2, 0, 0) atPosition:SCNVector3Make(0, 100, 0) impulse:YES];
}
#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(0x054C51);
case 1: return ColorHex(0x229C89);
case 2: return ColorHex(0xC21800);
case 3: return ColorHex(0xFF3C20);
case 4: return ColorHex(0xFFCC7C);
}
return nil;
}
@end