/// <summary>
/// Synchronize the viewport between HAPI and Unity.
/// </summary>
void UpdateViewport(HEU_SessionBase session, HEU_SessionSyncData syncData)
{
SceneView sceneView = SceneView.lastActiveSceneView;
if (sceneView == null)
{
return;
}
// Get the latest viewport from HAPI, and check it agianst last update.
HAPI_Viewport viewHAPI = new HAPI_Viewport(true);
session.GetViewport(ref viewHAPI);
if (!HEU_HAPIUtility.IsViewportEqual(ref viewHAPI, ref syncData._viewportHAPI))
{
// HAPI has changed. Update local viewport.
Transform target = sceneView.camera.transform;
// Account for left-handed coordinate system
Vector3 pivot = new Vector3(-viewHAPI.position[0], viewHAPI.position[1], viewHAPI.position[2]);
Quaternion rotation = new Quaternion(viewHAPI.rotationQuaternion[0],
viewHAPI.rotationQuaternion[1], viewHAPI.rotationQuaternion[2],
viewHAPI.rotationQuaternion[3]);
Vector3 euler = rotation.eulerAngles;
euler.y = -euler.y;
euler.z = -euler.z;
// Flip the camera direction for Unity camera
rotation = Quaternion.Euler(euler) * Quaternion.Euler(0, 180f, 0);
// TODO: use viewHAPI.offset to set camera distance
// Unfortuantely no direct API to set the camera distance in Unity
sceneView.LookAtDirect(pivot, rotation);
sceneView.Repaint();
// Store HAPI viewport for comparison on next update
syncData._viewportHAPI = viewHAPI;
syncData._viewportLocal = viewHAPI;
syncData._viewportJustUpdated = true;
}
else
{
// HAPI hasn't changed, so let's see if local viewport has
Vector3 pivot = sceneView.pivot;
Quaternion rotation = sceneView.rotation;
float localDistance = sceneView.cameraDistance;
// Generate the local HAPI_Viewport
HAPI_Viewport viewLocal = new HAPI_Viewport(true);
// Account for left-handed coordinate system
viewLocal.position[0] = -pivot.x;
viewLocal.position[1] = pivot.y;
viewLocal.position[2] = pivot.z;
// Flip the camera direction for Unity camera
rotation = rotation * Quaternion.Euler(0, 180f, 0);
Vector3 euler = rotation.eulerAngles;
euler.y = -euler.y;
euler.z = -euler.z;
rotation = Quaternion.Euler(euler);
viewLocal.rotationQuaternion[0] = rotation.x;
viewLocal.rotationQuaternion[1] = rotation.y;
viewLocal.rotationQuaternion[2] = rotation.z;
viewLocal.rotationQuaternion[3] = rotation.w;
viewLocal.offset = syncData._viewportHAPI.offset;
if (!HEU_HAPIUtility.IsViewportEqual(ref viewLocal, ref syncData._viewportLocal))
{
// Always store local viewport for comparison on next update
syncData._viewportLocal = viewLocal;
if (syncData._viewportJustUpdated)
{
// Unity's SceneView internally updates the
// viewport after setting it, so this makes sure
// to update and store the latest change locally,
// and skip sending it to HAPI
syncData._viewportJustUpdated = false;
}
else
{
session.SetViewport(ref viewLocal);
// Store HAPI viewport for comparison on next update
syncData._viewportHAPI = viewLocal;
}
//Debug.Log("Setting HAPI (from local)");
//Debug.LogFormat("Pos: {0}, {1}, {2}", viewLocal.position[0], viewLocal.position[1], viewLocal.position[2]);
//Debug.LogFormat("Rot: {0}, {1}, {2}, {3}", viewLocal.rotationQuaternion[0],
//viewLocal.rotationQuaternion[1], viewLocal.rotationQuaternion[2], viewLocal.rotationQuaternion[3]);
//Debug.LogFormat("Dis: {0}, sceneView.camDist: {1}", viewLocal.offset, sceneView.cameraDistance);
}
}
}
