Type errors (array of structures) in IVRCompositor_FnTable

[lisphacker]

In the method, vr.IVRCompositor_FnTable.WaitGetPoses_callback.apply(), the first parameter should be an array of structures. I created this with the statement Structure[] pRenderPoseArray = new TrackedDevicePose_t.ByReference().toArray(VR.k_unMaxTrackedDeviceCount); based on the Kotlin code in https://github.com/java-opengl-labs/jogl-hello-vr. However, this value can't be passed into the apply method in Java since the types don't match.

I've also tried

Object pRenderPoseArray = new TrackedDevicePose_t().toArray(VR.k_unMaxTrackedDeviceCount); _vrCompositor.WaitGetPoses.apply((TrackedDevicePose_t) pRenderPoseArray, VR.k_unMaxTrackedDeviceCount, null, 0);

and

Object pRenderPoseArray = new TrackedDevicePose_t.ByReference().toArray(VR.k_unMaxTrackedDeviceCount); _vrCompositor.WaitGetPoses.apply((TrackedDevicePose_t) pRenderPoseArray, VR.k_unMaxTrackedDeviceCount, null, 0);

but they both give runtime errors (type mismatch)

Any suggestions on how to get this working in Java?

Cheers
Gautham

[elect86]

Since the array you have to pass has to be a contiguous area of memory, you should create it like this:

private TrackedDevicePose_t.ByReference trackedDevicePosePtr = new TrackedDevicePose_t.ByReference();
TrackedDevicePose_t[] trackedDevicePose = (TrackedDevicePose_t[]) trackedDevicePosePtr.toArray(vr.k_unMaxTrackedDeviceCount);

You can find here some old java code I used in the past for the sample

Let me know if it works