C Specification

The xrLoadControllerModelMSFT function loads the controller model as a byte buffer containing a binary form of glTF (a.k.a GLB file format) for the controller. The binary glTF data must conform to glTF 2.0 format defined at https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html.

// Provided by XR_MSFT_controller_model
XrResult xrLoadControllerModelMSFT(
    XrSession                                   session,
    XrControllerModelKeyMSFT                    modelKey,
    uint32_t                                    bufferCapacityInput,
    uint32_t*                                   bufferCountOutput,
    uint8_t*                                    buffer);

Parameters

Parameter Descriptions

  • session is the specified XrSession.

  • modelKey is the model key corresponding to the controller render model being queried.

  • bufferCapacityInput is the capacity of the buffer array, or 0 to indicate a request to retrieve the required capacity.

  • bufferCountOutput filled in by the runtime with the count of elements in buffer array, or returns the required capacity in the case that bufferCapacityInput is insufficient.

  • buffer is a pointer to an application-allocated array of the model for the device that will be filled with the uint8_t values by the runtime. It can be NULL if bufferCapacityInput is 0.

  • See Buffer Size Parameters chapter for a detailed description of retrieving the required buffer size.

Description

The xrLoadControllerModelMSFT function may be a slow operation and therefore should be invoked from a non-timing critical thread.

If the input modelKey is invalid, i.e. it is XR_NULL_CONTROLLER_MODEL_KEY_MSFT or not a key returned from XrControllerModelKeyStateMSFT, the runtime must return XR_ERROR_CONTROLLER_MODEL_KEY_INVALID_MSFT.

Valid Usage (Implicit)

  • The XR_MSFT_controller_model extension must be enabled prior to calling xrLoadControllerModelMSFT

  • session must be a valid XrSession handle

  • bufferCountOutput must be a pointer to a uint32_t value

  • If bufferCapacityInput is not 0, buffer must be a pointer to an array of bufferCapacityInput uint8_t values

Return Codes
On success, this command returns

  • XR_SUCCESS

  • XR_SESSION_LOSS_PENDING

On failure, this command returns

  • XR_ERROR_FUNCTION_UNSUPPORTED

  • XR_ERROR_VALIDATION_FAILURE

  • XR_ERROR_HANDLE_INVALID

  • XR_ERROR_INSTANCE_LOST

  • XR_ERROR_SESSION_LOST

  • XR_ERROR_OUT_OF_MEMORY

  • XR_ERROR_SIZE_INSUFFICIENT

  • XR_ERROR_CONTROLLER_MODEL_KEY_INVALID_MSFT

See Also

XR_MSFT_controller_model, XrControllerModelKeyMSFT, XrSession

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2024, The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.