typedef struct XrSpatialRaycastInfoANDROID {
    XrStructureType    type;
    const void*        next;
    XrSpace            space;
    XrTime             time;
    XrVector3f         origin;
    XrVector3f         direction;
    float              maxDistance;
} XrSpatialRaycastInfoANDROID;

typedef struct XrSpatialRaycastResultDataANDROID {
    XrPosef    hitPose;
    float      distanceSquared;
} XrSpatialRaycastResultDataANDROID;

typedef struct XrSpatialComponentRaycastResultListANDROID {
    XrStructureType                       type;
    void*                                 next;
    uint32_t                              raycastResultCount;
    XrSpatialRaycastResultDataANDROID*    raycastResults;
} XrSpatialComponentRaycastResultListANDROID;

typedef struct XrSpatialCapabilityConfigurationDepthRaycastANDROID {
    XrStructureType                     type;
    const void*                         next;
    XrSpatialCapabilityEXT              capability;
    uint32_t                            enabledComponentCount;
    const XrSpatialComponentTypeEXT*    enabledComponents;
} XrSpatialCapabilityConfigurationDepthRaycastANDROID;

XrResult xrCreateSpatialRaycastSnapshotANDROID(
    XrSpatialContextEXT                         spatialContext,
    const XrSpatialRaycastSnapshotCreateInfoANDROID* createInfo,
    XrSpatialSnapshotEXT*                       snapshot);

typedef struct XrSpatialRaycastSnapshotCreateInfoANDROID {
    XrStructureType                       type;
    const void*                           next;
    uint32_t                              componentTypeCount;
    const XrSpatialComponentTypeEXT*      componentTypes;
    const XrSpatialRaycastInfoANDROID*    raycastInfo;
} XrSpatialRaycastSnapshotCreateInfoANDROID;

// Check runtime supported capabilities
uint32_t capabilityCount;
CHK_XR(xrEnumerateSpatialCapabilitiesEXT(instance, systemId, 0, &capabilityCount, nullptr));
std::vector<XrSpatialCapabilityEXT> capabilities(capabilityCount);
CHK_XR(xrEnumerateSpatialCapabilitiesEXT(instance, systemId, capabilityCount, &capabilityCount, capabilities.data()));

if (std::find(capabilities.begin(), capabilities.end(), XR_SPATIAL_CAPABILITY_DEPTH_RAYCAST_ANDROID) == capabilities.end()) {
  return;
}

if (std::find(capabilities.begin(), capabilities.end(), XR_SPATIAL_CAPABILITY_PLANE_TRACKING_EXT) == capabilities.end()) {
  return;
}

// Create capability config for depth raycasting
std::vector<XrSpatialComponentTypeEXT> depthRaycastComponents {
  XR_SPATIAL_COMPONENT_TYPE_RAYCAST_RESULT_ANDROID
};

// Create capability config for depth raycasting
XrSpatialCapabilityConfigurationDepthRaycastANDROID depthRaycastConfig {
  .type = XR_TYPE_SPATIAL_CAPABILITY_CONFIGURATION_DEPTH_RAYCAST_ANDROID,
  .next = nullptr,
  .capability = XR_SPATIAL_CAPABILITY_DEPTH_RAYCAST_ANDROID,
  .enabledComponentCount = (uint32_t)depthRaycastComponents.size(),
  .enabledComponents = depthRaycastComponents.data(),
};

// Enumerate runtime supported components for plane tracking capability
XrSpatialCapabilityComponentTypesEXT capabilityComponentTypes {
  XR_TYPE_SPATIAL_CAPABILITY_COMPONENT_TYPES_EXT
};

bool isRaycastSupportedViaPlaneTracking;
std::vector<XrSpatialComponentTypeEXT> planeTrackingComponents {
  XR_SPATIAL_COMPONENT_TYPE_BOUNDED_2D_EXT,
  XR_SPATIAL_COMPONENT_TYPE_PLANE_ALIGNMENT_EXT,
};

CHK_XR(xrEnumerateSpatialCapabilityComponentTypesEXT(instance, systemId,
       XR_SPATIAL_CAPABILITY_PLANE_TRACKING_EXT, &capabilityComponentTypes));

planeTrackingComponents.resize(capabilityComponentTypes.componentTypeCountOutput);
capabilityComponentTypes.componentTypeCapacityInput = (uint32_t)planeTrackingComponents.size();
capabilityComponentTypes.componentTypes = planeTrackingComponents.data();

CHK_XR(xrEnumerateSpatialCapabilityComponentTypesEXT(instance, systemId,
       XR_SPATIAL_CAPABILITY_PLANE_TRACKING_EXT, &capabilityComponentTypes));

// Check if raycast is supported by plane tracking
isRaycastSupportedViaPlaneTracking = std::find(planeTrackingComponents.begin(),
planeTrackingComponents.end(), XR_SPATIAL_COMPONENT_TYPE_RAYCAST_RESULT_ANDROID)
!= planeTrackingComponents.end();

// Create capability config for plane tracking
XrSpatialCapabilityConfigurationPlaneTrackingEXT planeTrackingConfig {
  .type = XR_TYPE_SPATIAL_CAPABILITY_CONFIGURATION_PLANE_TRACKING_EXT,
  .next = nullptr,
  .capability = XR_SPATIAL_CAPABILITY_PLANE_TRACKING_EXT,
  .enabledComponentCount = (uint32_t)planeTrackingComponents.size(),
  .enabledComponents = planeTrackingComponents.data(),
};

// Create spatial context
// Types of raycast is determined by configs included in XrSpatialContextCreateInfoEXT
// For this example, both plane raycast & depth raycast are performed
std::vector<const XrSpatialCapabilityConfigurationBaseHeaderEXT*> capabilityConfigs;
capabilityConfigs.push_back(reinterpret_cast<const XrSpatialCapabilityConfigurationBaseHeaderEXT*>(&depthRaycastConfig));
if(isRaycastSupportedViaPlaneTracking) capabilityConfigs.push_back(reinterpret_cast<const XrSpatialCapabilityConfigurationBaseHeaderEXT*>(&planeTrackingConfig));

XrSpatialContextCreateInfoEXT contextCreateInfo {
  .type = XR_TYPE_SPATIAL_CONTEXT_CREATE_INFO_EXT,
  .next = nullptr,
  .capabilityConfigCount = (uint32_t)capabilityConfigs.size(),
  .capabilityConfigs = capabilityConfigs.data(),
};

CHK_XR(xrCreateSpatialContextAsyncEXT(session, &contextCreateInfo, &future))

// Completes creating spatial context
XrCreateSpatialContextCompletionEXT contextCompletion{
XR_TYPE_CREATE_SPATIAL_CONTEXT_COMPLETION_EXT};

CHK_XR(xrCreateSpatialContextCompleteEXT(session, future, &contextCompletion))

// Fill in the raycast info.
XrSpatialRaycastInfoANDROID raycastInfo {
  .type        = XR_TYPE_SPATIAL_RAYCAST_INFO_ANDROID,
  .next        = nullptr,
  .space       = viewSpace,
  .time        = updateTime,
  .origin      = {0.0f, 0.0f, 0.0f},
  .direction   = {0.0f, 0.0f,-1.0f},
  .maxDistance = 0.0f  // ray is unbounded
};

// Next pointing to the raycast info.
XrSpatialDiscoverySnapshotCreateInfoEXT discoverySnapshotCreateInfo {
  .type = XR_TYPE_SPATIAL_DISCOVERY_SNAPSHOT_CREATE_INFO_EXT,
  .next = &raycastInfo
};

// Create snapshot
CHK_XR(xrCreateSpatialDiscoverySnapshotAsyncEXT (
spatialContext, &discoverySnapshotCreateInfo, &future));

waitUntilReady(future);

// Complete async operation.
XrCreateSpatialDiscoverySnapshotCompletionInfoEXT
  createSnapshotCompletionInfo {
    .type      = XR_TYPE_CREATE_SPATIAL_DISCOVERY_SNAPSHOT_COMPLETION_INFO_EXT,
    .baseSpace = viewSpace,
    .time      = updateTime,
    .future    = future,
  };

XrCreateSpatialDiscoverySnapshotCompletionEXT completion {
  XR_TYPE_CREATE_SPATIAL_DISCOVERY_SNAPSHOT_COMPLETION_EXT};

CHK_XR(xrCreateSpatialDiscoverySnapshotCompleteEXT(
           spatialContext, &createSnapshotCompletionInfo,
           &completion));

if(completion.futureResult != XR_SUCCESS) return;

// Query hit result components
std::array<XrSpatialComponentTypeEXT, 1> enabledComponents = {
  XR_SPATIAL_COMPONENT_TYPE_RAYCAST_RESULT_ANDROID
};

XrSpatialComponentDataQueryConditionEXT queryCond {
  .type = XR_TYPE_SPATIAL_COMPONENT_DATA_QUERY_CONDITION_EXT,
  .componentTypeCount = 1,
  .componentTypes     = enabledComponents.data(),
};

XrSpatialComponentDataQueryResultEXT queryResult {
  .type = XR_TYPE_SPATIAL_COMPONENT_DATA_QUERY_RESULT_EXT,
};

XrResult result = xrQuerySpatialComponentDataEXT(
           completion.snapshot, &queryCond, &queryResult);

// Check query result.
if(result != XR_SUCCESS) return;

// Query again for the hit result list.
std::vector<XrSpatialRaycastResultDataANDROID> raycastResults;
raycastResults.resize(queryResult.entityIdCountOutput);
XrSpatialComponentRaycastResultListANDROID raycastResultList {
  .type               = XR_TYPE_SPATIAL_COMPONENT_RAYCAST_RESULT_LIST_ANDROID,
  .raycastResultCount = (uint32_t)raycastResults.size(),
  .raycastResults     = raycastResults.data(),
};

queryResult.next = &raycastResultList;
result = xrQuerySpatialComponentDataEXT(completion.snapshot, &queryCond, &queryResult);

// Check query result again.
if(result != XR_SUCCESS) return;

std::vector<XrSpatialEntityEXT> hitEntities;
std::vector<XrPosef> depthHitPoses;
for(uint32_t i = 0; i < queryResult.entityIdCountOutput; ++i) {
    // access raycastResults[i] for id & pose
    XrSpatialEntityIdEXT   id   = queryResult.entityIds[i];
    XrPosef                pose = raycastResults[i].hitPose;

    if (id != XR_NULL_SPATIAL_ENTITY_ID_EXT) {
        // hit entities (e.g. planes)
    // get entity handle via entity id
    XrSpatialEntityFromIdCreateInfoEXT entityCreateInfo {
      .type = XR_TYPE_SPATIAL_ENTITY_FROM_ID_CREATE_INFO_EXT,
      .entityId = id,
    };

    XrSpatialEntityEXT entity = XR_NULL_HANDLE;
    xrCreateSpatialEntityFromIdEXT(spatialContext, &entityCreateInfo, &entity);

    hitEntities.push_back(entity);
  } else {
    // hit depth
    depthHitPoses.push_back(pose);
  }
}

// Cleanup
xrDestroySpatialSnapshotEXT(completion.snapshot);

// fill in create info
XrSpatialRaycastSnapshotCreateInfoANDROID createInfo {
  .type = XR_TYPE_SPATIAL_RAYCAST_SNAPSHOT_CREATE_INFO_ANDROID,
  .componentTypeCount = 0,   // include all hit spatial entities
  .componentTypes = nullptr,
  .raycastInfo = &raycastInfo
};

// create raycast snapshot
XrSpatialSnapshotEXT raycastSnapshot = XR_NULL_HANDLE;
CHK_XR(xrCreateSpatialRaycastSnapshotANDROID(
  spatialContext, &createInfo, &raycastSnapshot));

// ...
// query component data as previous example
// ...

// Cleanup
xrDestroySpatialSnapshotEXT(raycastSnapshot);