xrTriangleMeshBeginUpdateFB(3)

C Specification

The xrTriangleMeshBeginUpdateFB function is defined as:

// Provided by XR_FB_triangle_mesh
XrResult xrTriangleMeshBeginUpdateFB(
    XrTriangleMeshFB                            mesh);

Parameter Descriptions

Begins updating the mesh buffer data. The application must call this function before it makes any modifications to the buffers retrieved by xrTriangleMeshGetVertexBufferFB and xrTriangleMeshGetIndexBufferFB. If only the vertex buffer contents need to be updated, and the mesh is in state https://registry.khronos.org/OpenXR/specs/1.0/html/xrspec.html#fb_triangle_mesh_state_ready, xrTriangleMeshBeginVertexBufferUpdateFB may be used instead. To commit the modifications, the application must call xrTriangleMeshEndUpdateFB.

The triangle mesh mesh must be mutable. The runtime must return XR_ERROR_VALIDATION_FAILURE if the mesh is immutable.

Valid Usage (Implicit)

The XR_FB_triangle_mesh extension must be enabled prior to calling xrTriangleMeshBeginUpdateFB
mesh must be a valid XrTriangleMeshFB handle

Return Codes

On success, this command returns

On failure, this command returns

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.