yosegi block

ViewController.m

//
//  ViewController.m
//  yosegiBlock
//
//  Created by MizushimaYusuke on 8/19/15.
//  Copyright (c) 2015 MizushimaYusuke. All rights reserved.
//

#import "ViewController.h"
@import SceneKit;

@interface ViewController ()
@property (nonatomic, weak) SCNView *sceneView;
@property (nonatomic) int count;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupScene];
    [self createBlocks];
    [self createCamera];
}

- (void)setupScene {
    SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];
    sv.backgroundColor = [self color:0];
    sv.scene = [SCNScene scene];
    sv.allowsCameraControl = YES;
    [self.view addSubview:sv];
    
    self.sceneView = sv;
}

- (void)createBlocks {
    
    SCNNode* (^yosegi)(float) = ^SCNNode* (float s) {
        SCNNode *yosegiBlock = [SCNNode node];
        for (int i=0; i<16; i++) {
            float x = (i % 4) * s - 1.5 * s;
            float y = (i / 4) * s - 1.5 * s;
            SCNBox *b = [SCNBox boxWithWidth:s*1.2 height:s*1.2 length:s chamferRadius:s * 0.14];
            b.firstMaterial.diffuse.contents = [self color:((i / 4 + i % 4) % 2) ? 2 : 4];
            SCNNode *bNode = [SCNNode nodeWithGeometry:b];
            bNode.position = SCNVector3Make(x, y, 0);
            [yosegiBlock addChildNode:bNode];
        }
        return yosegiBlock;
    };

    for (int i=0; i<3; i++) {
        SCNNode *yosegiClone = yosegi(0.2);
        yosegiClone.name = [NSString stringWithFormat:@"%d", i];
        [self.sceneView.scene.rootNode addChildNode:yosegiClone];
    }
}

- (void)createCamera {
    SCNNode *camera = [SCNNode node];
    camera.camera = [SCNCamera camera];
    camera.position = SCNVector3Make(0, 0, 5);
    [self.sceneView.scene.rootNode addChildNode:camera];
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    
    
    SCNNode *n0 = [self.sceneView.scene.rootNode childNodeWithName:@"0" recursively:false];
    SCNNode *n1 = [self.sceneView.scene.rootNode childNodeWithName:@"1" recursively:false];
    SCNNode *n2 = [self.sceneView.scene.rootNode childNodeWithName:@"2" recursively:false];

    if (self.count == 0) {
        [n0 runAction:[SCNAction moveTo:SCNVector3Make(0, 1.2, 0) duration:0.5]];
        [n2 runAction:[SCNAction moveTo:SCNVector3Make(0, -1.2, 0) duration:0.5]];
    }
    
    if (self.count == 1) {
        for (SCNNode *n in @[n0, n1, n2]) {
            [n runAction:[SCNAction rotateByX:0 y:0 z:M_PI * 0.25 duration:0.5]];
        }
    }
    
    if (self.count == 2) {
        for (SCNNode *n in @[n0, n1, n2]) {
            [n runAction:[SCNAction sequence:@[[SCNAction waitForDuration:[n.name intValue] * 0.4], [SCNAction repeatActionForever:[SCNAction rotateByAngle:M_PI aroundAxis:SCNVector3Make(0, 1, 0) duration:1.2]]]]];
        }
    }
    
    self.count++;
}

#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 {
    if (i > 4) return nil;
    int code[] = {0x5E9977, 0xE9DBA6, 0xC9BD8A, 0xF25C05, 0x362B24};
    return ColorHex(code[i]);
}

@end