I have a method that renders 2D shapes on top of a 3D sphere. I'm using SpriteKit for the 2D shapes and SceneKit for the 3D content.
I want to be able to fill the color of my SKShapeNode and then apply the material to the SCNNode
let path = generatePinPath(nodeWidth: 120)
let scene = SKScene(size: CGSize(width: 120, height: 75))
let pinShape = SKShapeNode(path: path)
pinShape.name = "A Label"
pinShape.fillColor = SKColor.red
pinShape.strokeColor = SKColor.white
pinShape.lineWidth = 3
scene.addChild(pinShape)
let materialProperty = SCNMaterial()
materialProperty.diffuse.contents = scene
planeGeometry.firstMaterial = materialProperty
planeGeometry.firstMaterial?.isDoubleSided = false
let node = SCNNode(geometry: planeGeometry)
nodes.append(node)
My generatePinPath method looks like this:
func generatePinPath(nodeWidth: Int) -> CGMutablePath {
let path = CGMutablePath()
path.move(to: CGPoint(x: 20, y: 0)
path.addLine(to: CGPoint(x: CGFloat(nodeWidth - 20), y: 0))
path.addCurve(to: CGPoint(x: CGFloat(nodeWidth - 20), y: 53), control1: CGPoint(x: CGFloat(nodeWidth), y: 0), control2: CGPoint(x: CGFloat(nodeWidth), y: 53))
path.addLine(to: CGPoint(x: CGFloat(nodeWidth / 2) + 20, y: 53))
path.closeSubpath()
return path
}
When the shape renders on the 3D space, the red color is present but it is "bleeding" outside of the defined path. I don't know why this is happening, I just assumed that the path would constrain the color inside of itself. The stroke color and lines are rendering as expected.
It's possible that the "SpriteKit rendering inside SceneKit rendering" code path has an issue. What happens if you use a CAShapeLayer instead of SKShapeNode?