こっちだよ人形

どっちに行こうかなと。手を伸ばした人形がくるくるまわる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 setupScene];

    [self createPlate];

    [self createFigure];

    [self createCamera];

    [self createLight];

}

– (void)setupScene {

    SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];

    sv.backgroundColor = [self color:2];

    sv.scene = [SCNScene scene];

    [self.view addSubview:sv];

    

    self.sceneView = sv;

}

– (void)createPlate

{

    SCNCylinder *plate = [SCNCylinder cylinderWithRadius:25 height:1];

    plate.firstMaterial.diffuse.contents = [self color:1];

    SCNNode *plateNode = [SCNNode nodeWithGeometry:plate];

    [self.sceneView.scene.rootNode addChildNode:plateNode];

}

– (void)createFigure {

    SCNNode *figureNode = [SCNNode node];

    figureNode.name = @”figure”;

    figureNode.position = SCNVector3Make(0, 5, 0);

    [self.sceneView.scene.rootNode addChildNode:figureNode];

    

    SCNBox *head = [SCNBox boxWithWidth:5 height:4 length:4 chamferRadius:0.2];

    head.firstMaterial.diffuse.contents = [self color:0];

    SCNNode *headNode = [SCNNode nodeWithGeometry:head];

    headNode.position = SCNVector3Make(0, 5, 0);

    [figureNode addChildNode:headNode];

    

    SCNBox *body = [SCNBox boxWithWidth:3 height:5.0 length:1.5 chamferRadius:0.2];

    body.firstMaterial.diffuse.contents = [self color:0];

    SCNNode *bodyNode = [SCNNode nodeWithGeometry:body];

    [figureNode addChildNode:bodyNode];

    

    for (int i=0; i<2; i++) {

        SCNBox *arm = [SCNBox boxWithWidth:1.2 height:4 length:1.2 chamferRadius:0.2];

        arm.firstMaterial.diffuse.contents = [self color:0];

        SCNNode *armNode = [SCNNode nodeWithGeometry:arm];

        armNode.pivot = SCNMatrix4MakeTranslation(0, 1.8, 0);

        armNode.position = SCNVector3Make(-2.2 + 4.4 * i, 1.8, 0);

        [figureNode addChildNode:armNode];

        

        if (i == 0) {

            armNode.name = @”movable hand”;

        }

        

        SCNBox *foot = [SCNBox boxWithWidth:1.3 height:2 length:1.3 chamferRadius:0.2];

        foot.firstMaterial.diffuse.contents = [self color:0];

        SCNNode *footNode = [SCNNode nodeWithGeometry:foot];

        footNode.position = SCNVector3Make(-0.8 + 1.6 * i, –3.5, 0);

        [figureNode addChildNode:footNode];

    }

    figureNode.physicsBody = [SCNPhysicsBody dynamicBody];

    figureNode.physicsBody.velocityFactor = SCNVector3Make(0, 0, 0);

    figureNode.physicsBody.angularVelocityFactor = SCNVector3Make(0, 1, 0);

}

– (void)createCamera {

    SCNNode *camera = [SCNNode node];

    camera.camera = [SCNCamera camera];

    camera.camera.zFar = 160;

    camera.position = SCNVector3Make(0, 30, 100);

    camera.rotation = SCNVector4Make(1, 0, 0, –0.02 * M_PI);

    [self.sceneView.scene.rootNode addChildNode:camera];

}

– (void)createLight {

    SCNLight *light = [SCNLight light];

    light.type = SCNLightTypeSpot;

    light.castsShadow = YES;

    

    SCNNode *lightNode = [SCNNode node];

    lightNode.light = light;

    lightNode.position = SCNVector3Make(20, 30, 70);

    lightNode.rotation = SCNVector4Make(1, 0, 0, –0.35);

    [self.sceneView.scene.rootNode addChildNode:lightNode];

    

    SCNLight *ambient = [SCNLight light];

    ambient.type = SCNLightTypeAmbient;

    ambient.color = [UIColor colorWithWhite:0.5 alpha:1.0];

    SCNNode *ambientNode = [SCNNode node];

    ambientNode.light = ambient;

    ambientNode.position = SCNVector3Make(0, 30, 70);

    ambientNode.rotation = SCNVector4Make(1, 0, 0, –0.35);

    [self.sceneView.scene.rootNode addChildNode:ambientNode];

}

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

{

    SCNNode *hand = [self.sceneView.scene.rootNode childNodeWithName:@”movable hand” recursively:YES];

    [hand runAction:[SCNAction rotateByAngle:0.5 * M_PI aroundAxis:SCNVector3Make(1, 0, 0) duration:0.5]];

    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

        SCNNode *figure = [self.sceneView.scene.rootNode childNodeWithName:@”figure” recursively:NO];

        [figure.physicsBody applyTorque:SCNVector4Make(0, 1, 0, 50.0) 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 {

    if (i > 2) return nil;

    

    int colors[] = {0x142426, 0xD1B748, 0xFFFDBE};

    return ColorHex(colors[i]);

}

@end