ポーン

ポーンを表示するiPhoneアプリのサンプルコードを描いてみます。

#import “ViewController.h”

@import SceneKit;

@interface ViewController ()

@property (nonatomic, weak) SCNView *sceneView;

@property (nonatomic) int state;

@end

@implementation ViewController

– (void)viewDidLoad {

    [super viewDidLoad];

    [self setupScene];

    [self createBoard];

    [self createCamera];

    [self createLight];

}

– (void)setupScene {

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

    sv.backgroundColor = [UIColor brownColor];

    sv.scene = [SCNScene scene];

    sv.allowsCameraControl = YES;

    [self.view addSubview:sv];

    

    self.sceneView = sv;

}

– (void)createBoard {

    float w = 5;

    SCNGeometry *whitePlate = [SCNBox boxWithWidth:w height:1 length:w chamferRadius:0];

    whitePlate.firstMaterial.diffuse.contents = [UIColor whiteColor];

    SCNGeometry *blackPlate = [SCNBox boxWithWidth:w height:1 length:w chamferRadius:0];

    blackPlate.firstMaterial.diffuse.contents = [UIColor blackColor];

    for (int i=0; i<4; i++) {

        float x = (i % 2) * w;

        float z = (i / 2) * w;

        SCNNode *plate = [SCNNode nodeWithGeometry:(x == z) ? whitePlate : blackPlate];

        plate.position = SCNVector3Make(x, 0, z);

        plate.physicsBody = [SCNPhysicsBody staticBody];

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

    }

}

– (void)createPawnWithColor:(UIColor*)color {

    SCNNode *pawn = [SCNNode node];

    SCNSphere *head = [SCNSphere sphereWithRadius:1];

    head.firstMaterial.diffuse.contents = color;

    SCNNode *headNode = [SCNNode nodeWithGeometry:head];

    headNode.position = SCNVector3Make(0, 2, 0);

    [pawn addChildNode:headNode];

    

    SCNCylinder *neck = [SCNCylinder cylinderWithRadius:1 height:0.3];

    neck.firstMaterial.diffuse.contents = color;

    SCNNode *neckNode = [SCNNode nodeWithGeometry:neck];

    neckNode.position = SCNVector3Make(0, 1, 0);

    [pawn addChildNode:neckNode];

    

    SCNCone *body = [SCNCone coneWithTopRadius:0.5 bottomRadius:1 height:3];

    body.firstMaterial.diffuse.contents = color;

    SCNNode *bodyNode = [SCNNode nodeWithGeometry:body];

    bodyNode.position = SCNVector3Make(0, 0, 0);

    [pawn addChildNode:bodyNode];

    

    SCNCone *base = [SCNCone coneWithTopRadius:1.5 bottomRadius:1.8 height:1];

    base.firstMaterial.diffuse.contents = color;

    SCNNode *baseNode = [SCNNode nodeWithGeometry:base];

    baseNode.position = SCNVector3Make(0, –2, 0);

    [pawn addChildNode:baseNode];

    

    

    pawn.position = SCNVector3Make(0, 6, 0);

    pawn.physicsBody = [SCNPhysicsBody dynamicBody];

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

    

}

– (void)createCamera {

    SCNNode *camera = [SCNNode node];

    camera.camera = [SCNCamera camera];

    camera.position = SCNVector3Make(2.5, 10, 25);

    camera.rotation = SCNVector4Make(1, 0, 0, –0.2);

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

}

– (void)createLight {

    SCNLight *light = [SCNLight light];

    light.type = SCNLightTypeOmni;

    SCNNode *lightNode = [SCNNode node];

    lightNode.position = SCNVector3Make(0, 20, 20);

    lightNode.light = light;

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

    

    

    SCNLight *light2 = [SCNLight light];

    light2.type = SCNLightTypeDirectional;

    SCNNode *light2Node = [SCNNode node];

    light2Node.position = SCNVector3Make(0, 30, 30);

    light2Node.rotation = SCNVector4Make(1, 0, 0, –0.2);

    light2Node.light = light2;

    [self.sceneView.scene.rootNode addChildNode:light2Node];

}

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

    if (self.state == 0) {

        [self createPawnWithColor:[UIColor colorWithWhite:0.1 alpha:1]];

        ++self.state;

    }

}

@end