今日はカフェウォール錯視を表示するiPhoneアプリのサンプルコードを描いてみます。
#import “ViewController.h”
@import SpriteKit;
@interface CafeScene : SKScene
@end
@implementation CafeScene
– (void)didMoveToView:(SKView *)view
{
self.backgroundColor = [SKColor whiteColor];
[self createCafeWall];
}
– (void)createCafeWall
{
for (int i=0; i<10; i++) {
SKSpriteNode *slope = [SKSpriteNode spriteNodeWithColor:[SKColor lightGrayColor] size:CGSizeMake(300, 2)];
slope.position = CGPointMake(160, i * 40 + 60);
[self addChild:slope];
slope.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:slope.size];
slope.physicsBody.dynamic = NO;
for (int j=0; j<5; j++) {
SKSpriteNode *box = [SKSpriteNode spriteNodeWithColor:[SKColor blackColor] size:CGSizeMake(40, 40)];
box.position = CGPointMake(j * 80 + (i%2) * 20 + 10, slope.position.y + 20);
[self addChild:box];
}
}
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
CGPoint p = [[touches anyObject] locationInNode:self];
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:10 startAngle:0 endAngle:2.0*M_PI clockwise:NO];
SKShapeNode *ball = [SKShapeNode node];
ball.path = path.CGPath;
ball.position = CGPointMake(-20, p.y);
ball.fillColor = [SKColor yellowColor];
[self addChild:ball];
ball.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:10];
[ball.physicsBody applyImpulse:CGVectorMake(5, 0)];
}
– (void)didSimulatePhysics
{
[self enumerateChildNodesWithName:@”ball” usingBlock:^(SKNode *ball, BOOL *stop) {
if (ball.position.x > 330 || ball.position.x < –10) {
[ball removeFromParent];
}
}];
}
@end
@interface ViewController ()
@end
@implementation ViewController
– (void)viewDidLoad
{
[super viewDidLoad];
SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:spriteView];
SKScene *scene = [[CafeScene alloc] initWithSize:spriteView.frame.size];
[spriteView presentScene:scene];
}
@end