I wanted to show a progress of a certain part of the game using an entity that looks like a "pie chart", basically cylinder with a cut-out. And as progress is changed (0-100) the entity would be fuller.
Is there a way to create this kind of model entity? I know there are ways to animated entities, warp them between meshes, but I was wondering if somebody knows how to achieve it in a simplest way possible? Maybe some kind of custom shader that would just change how the material is rendered? I do not need its physics body, just to show it.
I know how to do it in UIKit and classic 2d UI Apple frameworks but here working with model entities it gets a bit tricky for me.
Here is example of how it would look, examples are in 2d but you can imagine it being 3d cylinders with a cut-out.
Thank you!
You can use RealityViewAttachments to display any SwiftUI View as an entity. Here's a snippet that adds a ProgressView to a RealityView's content. This should point you in the right direction. For a deeper dive into RealityKit and attachments see Diorama.
struct ImmersiveView: View {
private let attachmentId = "attachment"
@State private var progress:Double = 0.1
// RealityKit uses meters so its best to specify the size in meters
// and let PhysicalMetric do the conversion to units appropriate for SwiftUI
// https://developer.apple.com/documentation/swiftui/physicalmetric
@PhysicalMetric(from: .meters)
var progressWidth = 0.5
var body: some View {
RealityView { content, attachments in
if let attachment = attachments.entity(for: attachmentId) {
attachment.position = [0, 1.2, -1.5]
content.add(attachment)
}
}
attachments: {
Attachment(id: attachmentId) {
VStack {
ProgressView(value: progress)
.frame(width: progressWidth)
Spacer(minLength: 10)
Slider(
value: $progress,
in: 0...1
)
}
}
}
}
}
