static void UpdateRealtimeSubdivisionDebug()
{
var debugDisplay = ProbeReferenceVolume.instance.debugDisplay;
if (!debugDisplay.realtimeSubdivision)
return;
// Avoid killing the GPU when Unity is in background and runInBackground is disabled
if (!Application.runInBackground && !UnityEditorInternal.InternalEditorUtility.isApplicationActive)
return;
// update is called 200 times per second so we bring down the update rate to 60hz to avoid overloading the GPU
if (Time.realtimeSinceStartupAsDouble - s_LastRefreshTime < 1.0f / 60.0f)
return;
s_LastRefreshTime = Time.realtimeSinceStartupAsDouble;
if (Time.realtimeSinceStartupAsDouble - s_LastSubdivisionTime > debugDisplay.subdivisionDelayInSeconds)
{
var probeVolume = GameObject.FindObjectOfType<ProbeVolume>();
if (probeVolume == null || !probeVolume.isActiveAndEnabled || ProbeReferenceVolume.instance.sceneData == null)
return;
var profile = ProbeReferenceVolume.instance.sceneData.GetProfileForScene(probeVolume.gameObject.scene);
if (profile == null)
return;
if (s_CurrentSubdivision == null)
{
// Start a new Subdivision
s_CurrentSubdivision = Subdivide();
}
// Step the subdivision with the amount of cell per frame in debug menu
int updatePerFrame = debugDisplay.subdivisionCellUpdatePerFrame;
// From simplification level 5 and higher, the cost of calculating one cell is very high, so we adjust that number.
if (profile.simplificationLevels > 4)
updatePerFrame = (int)Mathf.Max(1, updatePerFrame / Mathf.Pow(9, profile.simplificationLevels - 4));
for (int i = 0; i < debugDisplay.subdivisionCellUpdatePerFrame; i++)
{
if (!s_CurrentSubdivision.MoveNext())
{
s_LastSubdivisionTime = Time.realtimeSinceStartupAsDouble;
s_CurrentSubdivision = null;
break;
}
}
IEnumerator Subdivide()
{
var ctx = ProbeGIBaking.PrepareProbeSubdivisionContext();
// Cull all the cells that are not visible (we don't need them for realtime debug)
ctx.cells.RemoveAll(c =>
{
return probeVolume.ShouldCullCell(c.position);
});
Camera activeCamera = Camera.current ?? SceneView.lastActiveSceneView.camera;
// Sort cells by camera distance to compute the closest cells first
if (activeCamera != null)
{
var cameraPos = activeCamera.transform.position;
ctx.cells.Sort((c1, c2) =>
{
c1.volume.CalculateCenterAndSize(out var c1Center, out var _);
float c1Distance = Vector3.Distance(cameraPos, c1Center);
c2.volume.CalculateCenterAndSize(out var c2Center, out var _);
float c2Distance = Vector3.Distance(cameraPos, c2Center);
return c1Distance.CompareTo(c2Distance);
});
}
// Progressively update cells:
var cells = ctx.cells.ToList();
// Remove all the cells that was not updated to prevent ghosting
foreach (var cellVolume in ProbeReferenceVolume.instance.realtimeSubdivisionInfo.Keys.ToList())
{
if (!cells.Any(c => c.volume.Equals(cellVolume)))
ProbeReferenceVolume.instance.realtimeSubdivisionInfo.Remove(cellVolume);
}
// Subdivide visible cells
foreach (var cell in cells)
{
// Override the cell list to only compute one cell
ctx.cells.Clear();
ctx.cells.Add(cell);
var result = ProbeGIBaking.BakeBricks(ctx);
if (result.bricksPerCells.TryGetValue(cell.position, out var bricks))
ProbeReferenceVolume.instance.realtimeSubdivisionInfo[cell.volume] = bricks;
else
ProbeReferenceVolume.instance.realtimeSubdivisionInfo.Remove(cell.volume);
yield return null;
}
yield break;
}
}
}
