Drawing a line between two points using SceneKit

Question

I have two points (let\'s call them pointA and pointB) of type SCNVector3. I want to draw a line between them. Seems like it should be easy, but can\'t find a way to do it.<

Answer 1

Here is a swift5 version:

func lineBetweenNodes(positionA: SCNVector3, positionB: SCNVector3, inScene: SCNScene) -> SCNNode {
    let vector = SCNVector3(positionA.x - positionB.x, positionA.y - positionB.y, positionA.z - positionB.z)
    let distance = sqrt(vector.x * vector.x + vector.y * vector.y + vector.z * vector.z)
    let midPosition = SCNVector3 (x:(positionA.x + positionB.x) / 2, y:(positionA.y + positionB.y) / 2, z:(positionA.z + positionB.z) / 2)

    let lineGeometry = SCNCylinder()
    lineGeometry.radius = 0.05
    lineGeometry.height = distance
    lineGeometry.radialSegmentCount = 5
    lineGeometry.firstMaterial!.diffuse.contents = GREEN

    let lineNode = SCNNode(geometry: lineGeometry)
    lineNode.position = midPosition
    lineNode.look (at: positionB, up: inScene.rootNode.worldUp, localFront: lineNode.worldUp)
    return lineNode
}