Has anyone managed to get an SCNText string wrapping correctly within a containerFrame in ARKit?
I've had a go, but the lines seem to be superimposed on top of each other, rather than being rendered vertically in sequence. If it was a problem with the size of the containerFrame being too small, I'd expect the string to just be truncated. It doesn't make a difference which truncation mode I use (...end / ...none / ..middle) etc. https://www.dropbox.com/s/hfe01fm2bfvuvs0/IMG_1E372152586C-1.jpeg?dl=0
This is code from my SCNNode subclass, creating the extruded text in the init method. The same code works fine (with different sizes obviously) to produce wrapped, extruded text in a standard SceneKit view.
let extrudedText = SCNText(string: definition.text, extrusionDepth: 0.1) extrudedText.font = UIFont(name: definition.fontname, size: 0.2)! extrudedText.containerFrame = CGRect(origin: .zero, size: CGSize(width: 0.8, height: 1.5)) extrudedText.truncationMode = kCATruncationNone extrudedText.isWrapped = true extrudedText.alignmentMode = kCAAlignmentLeft let material = SCNMaterial.material(named: "iron") extrudedText.materials = [material] geometry = extrudedText // change pivot point to middle of text box let (min, max) = boundingBox let dx = min.x + 0.5 * (max.x - min.x) let dy = min.y + 0.5 * (max.y - min.y) let dz = min.z + 0.5 * (max.z - min.z) pivot = SCNMatrix4MakeTranslation(dx, dy, dz)
Answer from Apple: my font size was too small. If I use a "normal" font size and containing frame on the SCNText object, and then set a scale on the node that contains it, everything wraps as expected. Something like:
extrudedText.font = UIFont(name: definition.fontname, size: 20)! extrudedText.containerFrame = CGRect(origin: .zero, size: CGSize(width: 100.0, height: 500.0)) ... scale = SCNVector3Make(0.01, 0.01, 0.01)