Draw SceneKit object between two points

Question

Having made some progress in the geometry side of things I\'m moving on to putting together an entire scene. That scene has a couple dozen objects, each defined by a boundin

Answer 1

EDIT: For under or equal to IOS 11

I've good news for you ! You can link two points and put a SCNNode on this Vector !

Take this and enjoy drawing line between two point !

class   CylinderLine: SCNNode
{
    init( parent: SCNNode,//Needed to add destination point of your line
        v1: SCNVector3,//source
        v2: SCNVector3,//destination
        radius: CGFloat,//somes option for the cylinder
        radSegmentCount: Int, //other option
        color: UIColor )// color of your node object
    {
        super.init()

        //Calcul the height of our line
        let  height = v1.distance(v2)

        //set position to v1 coordonate
        position = v1

        //Create the second node to draw direction vector
        let nodeV2 = SCNNode()

        //define his position
        nodeV2.position = v2
        //add it to parent
        parent.addChildNode(nodeV2)

        //Align Z axis
        let zAlign = SCNNode()
        zAlign.eulerAngles.x = Float(M_PI_2)

        //create our cylinder
        let cyl = SCNCylinder(radius: radius, height: CGFloat(height))
        cyl.radialSegmentCount = radSegmentCount
        cyl.firstMaterial?.diffuse.contents = color

        //Create node with cylinder
        let nodeCyl = SCNNode(geometry: cyl )
        nodeCyl.position.y = -height/2
        zAlign.addChildNode(nodeCyl)

        //Add it to child
        addChildNode(zAlign)

        //set contrainte direction to our vector
        constraints = [SCNLookAtConstraint(target: nodeV2)]
    }

    override init() {
        super.init()
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
    }
}

private extension SCNVector3{
    func distance(receiver:SCNVector3) -> Float{
        let xd = receiver.x - self.x
        let yd = receiver.y - self.y
        let zd = receiver.z - self.z
        let distance = Float(sqrt(xd * xd + yd * yd + zd * zd))

        if (distance < 0){
            return (distance * -1)
        } else {
            return (distance)
        }
    }
}