/// <summary>
/// Starts a fracture operation
/// </summary>
/// <param name="details">Fracture info</param>
/// <param name="callback">The object to fracture</param>
/// <param name="piecesParent">The parent of the resulting fractured pieces root object</param>
/// <param name="transferMass">True to distribute the original object's mass to the fracture pieces; false otherwise</param>
/// <param name="hideAfterFracture">True to hide the originating object after fracturing</param>
/// <returns></returns>
public static AsyncFractureResult StartFracture(FractureDetails details, FractureGeometry callback, Transform piecesParent, bool transferMass, bool hideAfterFracture)
{
AsyncFractureResult res = new AsyncFractureResult();
if (Suspended)
{
res.SetResult(null, new Bounds());
}
else
{
if (details.Asynchronous)
{
IEnumerator it = Instance.WaitForResults(FractureBuilder.Fracture(details), callback, piecesParent, transferMass, hideAfterFracture, res);
if (it.MoveNext())
{
#if UNITY_EDITOR
if (Instance._runningFractures.Count == 0 && !Application.isPlaying)
{
EditorApplication.update += Instance.OnEditorUpdate;
}
#endif
Instance._runningFractures.Add(new FractureInstance(res, it));
}
}
else
{
// There should only be one iteration
IEnumerator it = Instance.WaitForResults(FractureBuilder.Fracture(details), callback, piecesParent, transferMass, hideAfterFracture, res);
while (it.MoveNext())
{
Debug.LogWarning("DinoFracture: Sync fracture taking more than one iteration");
}
}
}
return(res);
}
private IEnumerator WaitForResults(AsyncFractureOperation operation, FractureGeometry callback, Transform piecesParent, bool transferMass, bool hideAfterFracture, AsyncFractureResult result)
{
while (!operation.IsComplete)
{
// Async fractures should not happen while in edit mode because game objects don't update too often
// and the coroutine is not pumped. Sync fractures should not reach this point.
System.Diagnostics.Debug.Assert(Application.isPlaying && operation.Details.Asynchronous);
yield return(null);
}
Rigidbody origBody = null;
if (transferMass)
{
origBody = callback.GetComponent <Rigidbody>();
}
float density = 0.0f;
if (origBody != null)
{
// Calculate the density by setting the density to
// a known value and see what the mass comes out to.
float mass = origBody.mass;
origBody.SetDensity(1.0f);
float volume = origBody.mass;
density = mass / volume;
// Reset the mass
origBody.mass = mass;
}
List <FracturedMesh> meshes = operation.Result.GetMeshes();
GameObject rootGO = new GameObject(callback.gameObject.name + " - Fracture Root");
rootGO.transform.parent = (piecesParent ?? callback.transform.parent);
rootGO.transform.position = callback.transform.position;
rootGO.transform.rotation = callback.transform.rotation;
rootGO.transform.localScale = Vector3.one; // Scale is controlled by the value in operation.Details
Material[] sharedMaterials = callback.GetComponent <Renderer>().sharedMaterials;
for (int i = 0; i < meshes.Count; i++)
{
GameObject go = (GameObject)Instantiate(callback.FractureTemplate);
go.name = "Fracture Object " + i;
go.transform.parent = rootGO.transform;
go.transform.localPosition = meshes[i].Offset;
go.transform.localRotation = Quaternion.identity;
go.transform.localScale = Vector3.one;
go.SetActive(true);
MeshFilter mf = go.GetComponent <MeshFilter>();
mf.mesh = meshes[i].Mesh;
MeshRenderer meshRenderer = go.GetComponent <MeshRenderer>();
if (meshRenderer != null)
{
Material[] materials = new Material[sharedMaterials.Length - meshes[i].EmptyTriangleCount + 1];
int matIdx = 0;
for (int m = 0; m < sharedMaterials.Length; m++)
{
if (!meshes[i].EmptyTriangles[m])
{
materials[matIdx++] = sharedMaterials[m];
}
}
if (!meshes[i].EmptyTriangles[sharedMaterials.Length])
{
materials[matIdx] = callback.InsideMaterial;
}
meshRenderer.sharedMaterials = materials;
}
MeshCollider meshCol = go.GetComponent <MeshCollider>();
if (meshCol != null)
{
meshCol.sharedMesh = mf.sharedMesh;
}
if (transferMass && origBody != null)
{
Rigidbody rb = go.GetComponent <Rigidbody>();
if (rb != null)
{
rb.SetDensity(density);
rb.mass = rb.mass; // Need to explicity set it for the editor to reflect the changes
}
}
FractureGeometry fg = go.GetComponent <FractureGeometry>();
if (fg != null)
{
fg.InsideMaterial = callback.InsideMaterial;
fg.FractureTemplate = callback.FractureTemplate;
fg.PiecesParent = callback.PiecesParent;
fg.NumGenerations = callback.NumGenerations - 1;
fg.DistributeMass = callback.DistributeMass;
}
}
OnFractureEventArgs args = new OnFractureEventArgs(callback, rootGO);
if (Application.isPlaying)
{
callback.gameObject.SendMessage("OnFracture", args, SendMessageOptions.DontRequireReceiver);
}
else
{
callback.OnFracture(args);
}
if (hideAfterFracture)
{
callback.gameObject.SetActive(false);
}
if (Application.isPlaying)
{
Transform trans = rootGO.transform;
for (int i = 0; i < trans.childCount; i++)
{
trans.GetChild(i).gameObject.SendMessage("OnFracture", args, SendMessageOptions.DontRequireReceiver);
}
}
result.SetResult(rootGO, operation.Result.EntireMeshBounds);
}
public OnFractureEventArgs(FractureGeometry orig, GameObject root)
{
OriginalObject = orig;
FracturePiecesRootObject = root;
}
