Dandelion

「だんでらいおん」たちを、そよ風にのせて飛ばすiPhoneアプリを描いてみます。

— movie —

— sample code —

#import “ViewController.h”

#import <SpriteKit/SpriteKit.h>

@interface DandelionScene : SKScene

@end

@implementation DandelionScene

– (void)didMoveToView:(SKView *)view

{

    self.backgroundColor = [SKColor greenColor];

    self.physicsWorld.gravity = CGVectorMake(0, –0.01);

    [self createDandelion];

    [self createStem];

    [self createButton];

}

#define LionCenter CGPointMake(CGRectGetMidX(self.frame)/2.0, CGRectGetMidY(self.frame))

– (void)createDandelion

{

    CGPoint o = LionCenter;

    float r = 50;

    float dAngle = M_PI / 5.0;

    for (int i=0; i<10; i++) {

        float x = r * cos(i * dAngle) + o.x;

        float y = r * sin(i * dAngle) + o.y;

        SKNode *lion = [self createLionSeed];

        lion.position = CGPointMake(x, y);

        [self addChild:lion];

    }

    

    dAngle = M_PI / 3.0;

    r = 25;

    for (int i=0; i<6; i++) {

        float x = r * cos(i * dAngle) + o.x;

        float y = r * sin(i * dAngle) + o.y;

        SKNode *lion = [self createLionSeed];

        lion.position = CGPointMake(x, y);

        [self addChild:lion];

    }

    

    SKNode *lion = [self createLionSeed];

    lion.position = o;

    [self addChild:lion];

}

– (SKNode *)createLionSeed

{

    SKNode *lion = [SKNode node];

    lion.name = @”lion”;

    float r = 12;

    float dAngle = M_PI / 4.0;

    float s = 10;

    UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-s/2.0, -s/2.0, s, s)];

    for (int i=0; i<8; i++) {

        float x = r * cos(dAngle * i);

        float y = r * sin(dAngle * i);

        SKShapeNode *bit = [SKShapeNode node];

        bit.fillColor = [SKColor yellowColor];

        bit.path = path.CGPath;

        bit.position = CGPointMake(x, y);

        [lion addChild:bit];

    }

    

    s = 22;

    UIBezierPath *facePath = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-s/2.0, -s/2.0, s, s)];

    SKShapeNode *face = [SKShapeNode node];

    face.path = facePath.CGPath;

    face.position = CGPointZero;

    face.fillColor = [SKColor yellowColor];

    face.lineWidth = 0;

    [lion addChild:face];

    

    CGPoint p[] = {CGPointMake(-6, 2), CGPointMake(6, 2), CGPointMake(0, –3)};

    for (int i=0; i<3; i++) {

        UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-1.5, –1.5, 3, 3)];

        SKShapeNode *dot = [SKShapeNode node];

        dot.path = path.CGPath;

        dot.fillColor = [SKColor blackColor];

        dot.lineWidth = 0;

        dot.position = p[i];

        [lion addChild:dot];

    }

    

    for (int i=0; i<2; i++) {

        UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(-4, –3, 8, 6)];

        SKShapeNode *white = [SKShapeNode node];

        white.path = path.CGPath;

        white.fillColor = [SKColor whiteColor];

        white.strokeColor = [SKColor darkGrayColor];

        white.lineWidth = 0.5;

        white.position = CGPointMake(i * 8 – 4, –5);

        [lion addChild:white];

    }

    

    return lion;

}

– (void)createStem

{

    CGPoint start = LionCenter;

    CGPoint end = CGPointMake(LionCenter.x, LionCenter.y – 200);

    UIBezierPath *path = [UIBezierPath bezierPath];

    [path moveToPoint:start];

    [path addCurveToPoint:end controlPoint1:CGPointMake(start.x – 50, start.y) controlPoint2:CGPointMake(end.x – 50, end.y)];

    SKShapeNode *stem = [SKShapeNode node];

    stem.path = path.CGPath;

    stem.lineWidth = 3;

    stem.zPosition = –1;

    stem.strokeColor = [SKColor darkGrayColor];

    [self addChild:stem];

}

– (void)createButton

{

    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointZero radius:120 startAngle:0.1 endAngle:M_PI/2.0 clockwise:NO];

    SKShapeNode *button = [SKShapeNode node];

    button.name = @”button”;

    button.fillColor = [[SKColor yellowColor] colorWithAlphaComponent:0.6];

    button.path = path.CGPath;

    button.position = CGPointMake(CGRectGetMaxX(self.frame), 0);

    [self addChild:button];

    

    SKLabelNode *label = [SKLabelNode node];

    label.text = @”breeze”;

    label.zRotation = M_PI_4;

    label.position = CGPointMake(-40, 40);

    [button addChild:label];

}

– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    CGPoint p = [[touches anyObject] locationInNode:self];

    SKNode *button = [self childNodeWithName:@”button”];

    if ([button containsPoint:p]) {

        

        SKAction *action = [SKAction sequence:@[[SKAction scaleTo:0.8 duration:0.1], [SKAction scaleTo:1.0 duration:0.2]]];

        [button runAction:action];

        

        [self breeze];

    }

}

– (void)breeze

{

    [self enumerateChildNodesWithName:@”lion” usingBlock:^(SKNode *node, BOOL *stop) {

        int duration = arc4random() % 15;

        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(duration * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

            node.physicsBody = [SKPhysicsBody bodyWithCircleOfRadius:20];

            node.physicsBody.categoryBitMask = 0x1;

            node.physicsBody.collisionBitMask = 0x2;

            float x = (arc4random() % 3);

            float y = (arc4random() % 3);

            float vy = (arc4random() % 10);

            [node.physicsBody applyForce:CGVectorMake(15, vy) atPoint:CGPointMake(x, y)];

        });

    }];

}

@end

@interface ViewController ()

@end

@implementation ViewController

– (void)viewDidAppear:(BOOL)animated

{

    SKView *spriteView = [[SKView alloc] initWithFrame:self.view.bounds];

    [self.view addSubview:spriteView];

    

    SKScene *scene = [[DandelionScene alloc] initWithSize:spriteView.frame.size];

    [spriteView presentScene:scene];

}

@end