VisionPro Question if that’s okay here - I’m finally checking out how to use my wee hand coded USD files in a VisionPro app. The Apple documentation seems to say RealityKit should obey the autoplay metadata, but it doesn’t seem to work. Is the problem with my USDA files, the Swift, or something else?
I can make the animations run with an explicit call to run, but what have I done wrong to get the one cube to autoplay?
import SwiftUI
import RealityKit
import RealityKitContent
struct ContentView: View {
@State var enlarge = false
var body: some View {
VStack {
//A ModelEntity, not expected to autoplay
Model3D(named: "cube_purple_autoplay", bundle: realityKitContentBundle)
//An Entity, actually expected this to autoplay
RealityView { content in
if let cube = try? await Entity(named: "cube_purple_autoplay", in: realityKitContentBundle) {
print(cube.components)
content.add(cube)
}
}
//Scene has one cube that should auto play, one that should not.
//Neither do, but both will start (as expected) with click.
RealityView { content in
// Add the initial RealityKit content
if let scene = try? await Entity(named: "Scene", in: realityKitContentBundle) {
content.add(scene)
}
} update: { content in
// Update the RealityKit content when SwiftUI state changes
if let scene = content.entities.first {
if enlarge {
for animation in scene.availableAnimations {
scene.playAnimation(animation.repeat())
}
} else {
scene.stopAllAnimations()
}
let uniformScale: Float = enlarge ? 1.4 : 1.0
scene.transform.scale = [uniformScale, uniformScale, uniformScale]
}
}
.gesture(TapGesture().targetedToAnyEntity().onEnded { _ in
enlarge.toggle()
})
VStack {
Toggle("Enlarge RealityView Content", isOn: $enlarge)
.toggleStyle(.button)
}.padding().glassBackgroundEffect()
}
}
}
No autospin meta data
#usda 1.0
(
defaultPrim = "transformAnimation"
endTimeCode = 89
startTimeCode = 0
timeCodesPerSecond = 24
upAxis = "Y"
)
def Xform "transformAnimation" ()
{
def Scope "Geom"
{
def Xform "xform1"
{
float xformOp:rotateY.timeSamples = {
...
}
double3 xformOp:translate = (0, 0, 0)
uniform token[] xformOpOrder = ["xformOp:translate", "xformOp:rotateY"]
over "cube_1" (
prepend references = @./cube_base_with_purple_linked.usd@
)
{
double3 xformOp:translate = (0, 0, 0)
uniform token[] xformOpOrder = ["xformOp:translate"]
}
}
With autoplay metadata
#usda 1.0
(
defaultPrim = "autoAnimation"
endTimeCode = 89
startTimeCode = 0
timeCodesPerSecond = 24
autoPlay = true
playbackMode = "loop"
upAxis = "Y"
)
def Xform "autoAnimation"
{
def Scope "Geom"
{
def Xform "xform1"
{
float xformOp:rotateY.timeSamples = {
...
}
double3 xformOp:translate = (0, 0, 0)
uniform token[] xformOpOrder = ["xformOp:translate", "xformOp:rotateY"]
over "cube_1" (
prepend references = @./cube_base_with_purple_linked.usd@
)
{
quatf xformOp:orient = (1, 0, 0, 0)
float3 xformOp:scale = (2, 2, 2)
double3 xformOp:translate = (0, 0, 0)
uniform token[] xformOpOrder = ["xformOp:translate", "xformOp:orient", "xformOp:scale"]
}
}
}
}
