我正在寻找一种方法来使一个笔记绕其z轴旋转360度。持有相机的节点沿着z轴负方向移动,不允许更改其y和z。
我已经尝试过
CABasicAnimation
,但没有成功。
有人能指点我一个解决方案吗?可以考虑将其旋转不到360度?由于您的标题中提到了“无限”,所以应该没问题,而且重复动画一遍又一遍最终会超过360度。
否则,您可以查看苹果的默认SceneKit项目,它对我非常有用:
[cameraNode runAction:[SCNAction repeatActionForever:[SCNAction rotateByX:0 y:.5 z:0 duration:1]]];
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"rotation"];
animation.toValue = [NSValue valueWithSCNVector4:SCNVector4Make(0, 0, 1, M_PI*2)];
animation.duration = 15;
animation.repeatCount = MAXFLOAT; //repeat forever
[YOURNODE addAnimation:animation forKey:nil];
cameraNode
上,它没有任何效果。在cameraNode.camera
上尝试这个会给我这个错误信息:[SCNKit ERROR] rotation is not an animatable path (from <SCNCamera: 0x14ed5470>)
。 - tomalbrclet node = SCNNode()
self.sceneView.scene.rootNode.addChildNode(node)
//creating an box object
node.geometry = SCNBox(width: 0.1, height: 0.1, length: 0.1, chamferRadius: 0)
node.geometry?.firstMaterial?.diffuse.contents = UIColor.blue
node.position = SCNVector3(0,0,0)
//adding a rotation by Z axis
let action = SCNAction.rotateBy(x: 0, y: 0, z: CGFloat(GLKMathDegreesToRadians(360)), duration: 8)
let forever = SCNAction.repeatForever(action)
node.runAction(forever)
[[ZnodeOnly physicsBody] setVelocityFactor:SCNVector3Make(0, 0, 1)];
[[ZnodeOnly physicsBody] setAngularVelocityFactor:SCNVector3Make(0, 0, 1)];
[RotatingNode runAction:[SCNAction repeatActionForever:[SCNAction rotateByAngle:-360/(180/M_PI) aroundAxis:SCNVector3Make(0, 0, 1) duration:1]]];
[node setRotation:(x,y,z, w)]
是一种立即进行的变换。使用 SCNAction 可以使旋转动画化。
cameraNode.rotation = SCNVector4Make(0, 0, 1.f, cameraNode.presentationNode.rotation.w + DEGREES_TO_RADIANS(.5f));
给我一种奇怪的效果,就像在90度后突然回到0... - tomalbrc