/// <summary>
/// initialize PVS manager.
/// </summary>
/// <param name="pvsManager">the PVS manager.</param>
public static void InitPVSManager(PVSManager pvsManager)
{
pvsManager.debugPlanes = new List <PVSManager.Plane>();
pvsManager.debugLines = new List <PVSManager.Line>();
var currentScene = SceneManager.GetActiveScene();
var allRootGos = new List <GameObject>();
currentScene.GetRootGameObjects(allRootGos);
var worldBounds = new Bounds(Vector3.zero, Vector3.zero);
var renderers = new List <Renderer>();
var colliders = new List <Renderer>();
foreach (var go in allRootGos)
{
WalkThroughTransformTree(go.transform, (tr) =>
{
var renderer = tr.GetComponent <Renderer>();
if (!renderer || !tr.gameObject.isStatic)
{
return;
}
worldBounds.Encapsulate(renderer.bounds);
if (renderer.gameObject.tag == "PVS")
{
renderers.Add(renderer);
}
colliders.Add(renderer);
});
}
var counts = new Vector3(math.ceil(worldBounds.size.x / pvsManager.cellSize.x), math.ceil(worldBounds.size.y / pvsManager.cellSize.y), math.ceil(worldBounds.size.z / pvsManager.cellSize.z));
worldBounds.size = new Vector3(counts.x * pvsManager.cellSize.x, counts.y * pvsManager.cellSize.y, counts.z * pvsManager.cellSize.z);
pvsManager.worldBounds = worldBounds;
pvsManager.renderers = renderers;
pvsManager.colliders = colliders;
pvsManager.AllocVisibleFlags();
Debug.Log($"{sizeof(int) * pvsManager.visibleFlags.Length} bytes were allocated for visible flags.");
pvsManager.accelerationStructure = new RayTracingAccelerationStructure();
var subMeshFlagArray = new bool[32];
var subMeshCutoffArray = new bool[32];
for (var i = 0; i < 32; ++i)
{
subMeshFlagArray[i] = true;
subMeshCutoffArray[i] = false;
}
foreach (var renderer in colliders)
{
pvsManager.accelerationStructure.AddInstance(renderer, subMeshFlagArray, subMeshCutoffArray);
}
pvsManager.accelerationStructure.Build();
}
