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在ARSCNView中显示“ARAnchor”

arkit augmented-reality scenekit swift

Andy Jazz · 技术社区 · 6 年前

在阿基特我们可以想象 Feature Points' Cloud 在纵火中通过 .showFeaturePoints 类型属性:

self.sceneView.debugOptions = [ARSCNDebugOptions.showFeaturePoints]

此外,我们还可以显示坐标轴可视化,指示AR世界坐标系的位置和方向:

static let showWorldOrigin: SCNDebugOptions

ARAnchors

如果对

2 回复 | 直到 6 年前

BlackMirrorz 6 年前

只是为了跟进@sj-r和@Rickster的评论。

coordinateOrigin.scn 可在以下位置找到: Creating Face Based Experiences

我以前用过一个小片段来形象化Axis:

class BMOriginVisualizer: SCNNode {

    //----------------------
    //MARK: - Initialization
    //---------------------

    /// Creates An AxisNode To Vizualize ARAnchors
    ///
    /// - Parameter scale: CGFloat
    init(scale: CGFloat = 1) {

        super.init()

        //1. Create The X Axis
        let xNode = SCNNode()
        let xNodeGeometry = SCNBox(width: 1, height: 0.01, length: 0.01, chamferRadius: 0)
        xNode.geometry = xNodeGeometry
        xNodeGeometry.firstMaterial?.diffuse.contents = UIColor.red
        xNode.position = SCNVector3(0.5, 0, 0)
        self.addChildNode(xNode)

        //2. Create The Y Axis
        let yNode = SCNNode()
        let yNodeGeometry = SCNBox(width: 0.01, height: 1, length: 0.01, chamferRadius: 0)
        yNode.geometry = yNodeGeometry
        yNode.position = SCNVector3(0, 0.5, 0)
        yNodeGeometry.firstMaterial?.diffuse.contents = UIColor.green
        self.addChildNode(yNode)

        //3. Create The Z Axis
        let zNode = SCNNode()
        let zNodeGeometry = SCNBox(width: 0.01, height: 0.01, length: 1, chamferRadius: 0)
        zNode.geometry = zNodeGeometry
        zNodeGeometry.firstMaterial?.diffuse.contents = UIColor.blue
        zNode.position = SCNVector3(0, 0, 0.5)
        self.addChildNode(zNode)

        //4. Scale Our Axis
        self.scale = SCNVector3(scale, scale, scale)

    }


    required init?(coder aDecoder: NSCoder) { fatalError("Vizualizer Coder Not Implemented") }
}

func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {

        let anchorVizualizer = BMOriginVisualizer(scale: 0.5)
        node.addChildNode(anchorVizualizer)

}

希望这能对@sj-r提供的答案提供有用的扩展。

sj-r 6 年前

ARAnchor 仅表示“位置和方向”。你能看到的东西 SCNNode

可以为通过中的方法添加的每个锚点附加一个节点 ARSCNViewDelegate

func renderer(_ renderer: SCNSceneRenderer, nodeFor anchor: ARAnchor) -> SCNNode? {
    //create a node so you can visualize the location.
    let sphereNode = SCNNode(geometry: SCNSphere(radius: 0.5))
    sphereNode.geometry?.firstMaterial?.diffuse.contents = UIColor.blue
    return sphereNode
}

在添加锚定后(或系统添加锚定时,例如在启用了“平面检测”或“图像/对象检测”时),将调用该命令

sceneView.session.add(anchor:)