ワイヤーを使ってジャンプするような感じで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 () <SCNSceneRendererDelegate>
@property (nonatomic, weak) SCNView *sceneView;
@end
@implementation ViewController
– (void)viewDidLoad {
[super viewDidLoad];
[self setupScene];
[self createStrap];
[self createBase];
[self createHook];
[self createCamera];
}
– (void)setupScene {
SCNView *sv = [[SCNView alloc] initWithFrame:self.view.bounds];
sv.backgroundColor = [UIColor blackColor];
sv.scene = [SCNScene scene];
sv.autoenablesDefaultLighting = YES;
sv.delegate = self;
[self.view addSubview:sv];
self.sceneView = sv;
}
– (void)createStrap {
SCNNode *strap = [SCNNode node];
[self.sceneView.scene.rootNode addChildNode:strap];
SCNBox *bar = [SCNBox boxWithWidth:0.1 height:1 length:0.1 chamferRadius:0];
bar.firstMaterial.diffuse.contents = [UIColor brownColor];
SCNNode *barNode = [SCNNode nodeWithGeometry:bar];
[strap addChildNode:barNode];
for (int i=0; i<4; i++) {
SCNBox *b = [SCNBox boxWithWidth:0.5 height:0.1 length:0.1 chamferRadius:0];
b.firstMaterial.diffuse.contents = [UIColor whiteColor];
SCNNode *bNode = [SCNNode nodeWithGeometry:b];
if (i < 2) {
bNode.position = SCNVector3Make(0, (i%2)==0 ? –0.55 : –1, 0);
} else {
bNode.position = SCNVector3Make((i%2)==0 ? –0.25 : 0.25, –0.75, 0);
bNode.rotation = SCNVector4Make(0, 0, 1, M_PI * 0.5);
}
[strap addChildNode:bNode];
}
strap.rotation = SCNVector4Make(0, 1, 0, M_PI * 0.5);
strap.physicsBody = [SCNPhysicsBody staticBody];
}
– (void)createBase {
for (int i=0; i<2; i++) {
SCNBox *base = [SCNBox boxWithWidth:4 height:1 length:1 chamferRadius:0];
base.firstMaterial.diffuse.contents = [UIColor grayColor];
SCNNode *baseNode = [SCNNode nodeWithGeometry:base];
if (i==1) {
baseNode.name = @”base”;
}
baseNode.position = SCNVector3Make(i==0 ? –5 : 5, –4, 0);
[self.sceneView.scene.rootNode addChildNode:baseNode];
}
}
– (void)createHook {
SCNBox *player = [SCNBox boxWithWidth:0.5 height:0.5 length:0.5 chamferRadius:0.1];
player.firstMaterial.diffuse.contents = [UIColor yellowColor];
SCNNode *playerNode = [SCNNode nodeWithGeometry:player];
playerNode.name = @”player”;
playerNode.position = SCNVector3Make(-3.5, –3.3, –0.3);
[self.sceneView.scene.rootNode addChildNode:playerNode];
SCNNode *hook = [SCNNode node];
hook.name = @”hook”;
NSArray *b = @[[SCNBox boxWithWidth:0.1 height:0.2 length:0.1 chamferRadius:0],[SCNBox boxWithWidth:0.3 height:0.1 length:0.1 chamferRadius:0],[SCNBox boxWithWidth:0.1 height:0.4 length:0.1 chamferRadius:0]];
SCNVector3 p[] = {SCNVector3Make(0.15, 0.1, 0), SCNVector3Make(0, 0.2, 0), SCNVector3Make(-0.15, 0, 0)};
for (int i=0; i<3; i++) {
((SCNBox *)b[i]).firstMaterial.diffuse.contents = [UIColor whiteColor];
SCNNode *bNode = [SCNNode nodeWithGeometry:b[i]];
bNode.position = p[i];
[hook addChildNode:bNode];
}
hook.position = SCNVector3Make(-3.5, –3, 0);
[self.sceneView.scene.rootNode addChildNode:hook];
}
– (void)createCamera {
SCNNode *camera = [SCNNode node];
camera.camera = [SCNCamera camera];
camera.position = SCNVector3Make(0, 0, 8);
[self.sceneView.scene.rootNode addChildNode:camera];
}
– (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
SCNNode *hook = [self.sceneView.scene.rootNode childNodeWithName:@”hook” recursively:NO];
[hook removeAllActions];
hook.physicsBody = [SCNPhysicsBody dynamicBody];
[hook.physicsBody applyForce:SCNVector3Make(6, 6.6, 0) impulse:YES];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
SCNNode *player = [self.sceneView.scene.rootNode childNodeWithName:@”player” recursively:NO];
player.physicsBody = [SCNPhysicsBody dynamicBody];
player.physicsBody.mass = 0.1;
SCNPhysicsHingeJoint *j = [SCNPhysicsHingeJoint jointWithBody:player.physicsBody axis:SCNVector3Make(0, 0, 1) anchor:SCNVector3Make(-player.position.x, -player.position.y, 0)];
[self.sceneView.scene.physicsWorld addBehavior:j];
[player.physicsBody applyForce:SCNVector3Make(2, 0.7, 0) impulse:YES];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
SCNNode *base = [self.sceneView.scene.rootNode childNodeWithName:@”base” recursively:NO];
base.physicsBody = [SCNPhysicsBody staticBody];
});
});
}
– (void)renderer:(id<SCNSceneRenderer>)aRenderer didApplyAnimationsAtTime:(NSTimeInterval)time {
SCNNode *hook = [self.sceneView.scene.rootNode childNodeWithName:@”hook” recursively:NO];
SCNNode *player = [self.sceneView.scene.rootNode childNodeWithName:@”player” recursively:NO];
SCNNode *ropeOld = [self.sceneView.scene.rootNode childNodeWithName:@”rope” recursively:NO];
[ropeOld removeFromParentNode];
UIBezierPath *p = [UIBezierPath bezierPath];
[p moveToPoint:CGPointMake(hook.presentationNode.position.x, hook.presentationNode.position.y)];
[p addLineToPoint:CGPointMake(hook.presentationNode.position.x+0.1, hook.presentationNode.position.y)];
[p addLineToPoint:CGPointMake(player.presentationNode.position.x+0.1, player.presentationNode.position.y)];
[p addLineToPoint:CGPointMake(player.presentationNode.position.x, player.presentationNode.position.y)];
[p closePath];
SCNShape *rope = [SCNShape shapeWithPath:p extrusionDepth:0.2];
rope.firstMaterial.diffuse.contents = [UIColor brownColor];
SCNNode *ropeN = [SCNNode nodeWithGeometry:rope];
ropeN.name = @”rope”;
[self.sceneView.scene.rootNode addChildNode:ropeN];
}
@end