public void ExecuteExplosions(IEnumerable <Explosion> explosions, IEnumerable <DestructibleObject> dtObjects, IPolygonSubtractor subtractor)
{
// Store destructible objects in a new list, since we may add or remove some during processing
List <DestructibleObject> dtObjectList = dtObjects.ToList();
// Add new destructible objects to this list instead of objectList until finished processing the current explosion
List <DestructibleObject> pendingAdditions = new List <DestructibleObject>();
// Process all objects for all explosions
foreach (var exp in explosions)
{
List <List <DTPolygon> > relevantObjectPolygons = new List <List <DTPolygon> >();
List <int> relevantObjectIndices = new List <int>();
for (int i = 0; i < dtObjectList.Count; ++i)
{
var dtObj = dtObjectList[i];
// Do basic AABB-circle check to see whether we can skip processing this destructible object with this explosion
int bc = DTUtility.BoundsCheck(dtObj, exp);
if (bc == -1)
{
// Object is not affected by explosion
continue;
}
else if (bc == 1)
{
// Object is completely removed by explosion
dtObjectList[i] = null;
UnityEngine.Object.Destroy(dtObj.gameObject);
continue;
}
else
{
// Add object to the input list for the subtractor
relevantObjectPolygons.Add(dtObj.GetTransformedPolygonList());
relevantObjectIndices.Add(i);
continue;
}
}
var result = subtractor.SubtractBulk(relevantObjectPolygons, new DTPolygon[] { exp.DTPolygon });
// Iterate results corresponding to each input polygon group
for (int i = 0; i < result.Count; i++)
{
// Add new destructible objects for any output polygons that could not be matched with an input polygon
if (i >= relevantObjectPolygons.Count)
{
GameObject go = new GameObject();
DestructibleObject newObj = go.AddComponent <DestructibleObject>();
List <DTPolygon> polygroup = result[i][0];
newObj.ApplyTransformedPolygonList(polygroup);
pendingAdditions.Add(newObj);
continue;
}
// We know that these output polygons correspond to one or more pieces of this existing destructible object
DestructibleObject dtObj = dtObjectList[relevantObjectIndices[i]];
if (result[i].Count == 0)
{
// If no output polygons, remove the current destrucible object
dtObjectList[relevantObjectIndices[i]] = null;
UnityEngine.Object.Destroy(dtObj.gameObject);
continue;
}
else
{
// Otherwise apply the output polygons (fragments) to GameObjects (new or reused)
foreach (List <DTPolygon> polygroup in result[i])
{
if (polygroup != result[i].Last())
{
// Duplicate the GameObject that was clipped by the explosion, so that we maintain properties such as velocity
GameObject go = UnityEngine.Object.Instantiate(dtObj.gameObject, dtObj.transform.parent);
DestructibleObject newObj = go.GetComponent <DestructibleObject>();
// Apply the new clipped polygon
newObj.ApplyTransformedPolygonList(polygroup);
// Add it to the objectList, but not until after finished processing this explosion
pendingAdditions.Add(newObj);
continue;
}
else
{
// Reuse the existing GameObject by applying the new clipped polygon to it
dtObj.ApplyTransformedPolygonList(polygroup);
continue;
}
}
}
}
// Delete any entries that were set to null
for (int i = 0; i < dtObjectList.Count; ++i)
{
if (dtObjectList[i] == null)
{
dtObjectList.RemoveAt(i--);
}
}
// Add pendingAdditions elements to objectList so that they are included when processing the next explosion in explosions
dtObjectList.AddRange(pendingAdditions);
pendingAdditions.Clear();
}
}
public void ExecuteExplosions(IEnumerable <Explosion> explosions, IEnumerable <DestructibleObject> dtObjects, IPolygonSubtractor subtractor)
{
// Store destructible objects in a new list, since we may add or remove some during processing
List <DestructibleObject> dtObjectList = dtObjects.ToList();
// Add new destructible objects to this list instead of objectList until finished processing the current explosion
List <DestructibleObject> pendingAdditions = new List <DestructibleObject>();
// Process all objects for all explosions
var explosionPolygons = explosions.Select(e => e.DTPolygon);
var dtObjectPolygons = dtObjectList.Select(o => o.GetTransformedPolygonList());
int numInputPolygonGroups = dtObjectPolygons.Count();
var result = subtractor.SubtractBulk(dtObjectPolygons, explosionPolygons);
// Iterate results corresponding to each input polygon group
for (int i = 0; i < result.Count; i++)
{
// Add new destructible objects for any output polygon groups that could not be matched with an input polygon group
if (i >= numInputPolygonGroups)
{
GameObject go = new GameObject();
DestructibleObject newObj = go.AddComponent <DestructibleObject>();
List <DTPolygon> polygroup = result[i][0];
newObj.ApplyTransformedPolygonList(polygroup);
pendingAdditions.Add(newObj);
continue;
}
// We know that these output polygons correspond to one or more pieces of this existing destructible object
DestructibleObject dtObj = dtObjectList[i];
if (result[i].Count == 0)
{
// If no output polygons, remove the current destrucible object
dtObjectList[i] = null;
UnityEngine.Object.Destroy(dtObj.gameObject);
continue;
}
else
{
// Otherwise apply the output polygons (fragments) to GameObjects (new or reused)
foreach (List <DTPolygon> polygroup in result[i])
{
if (polygroup != result[i].Last())
{
// Duplicate the GameObject that was clipped by the explosion, so that we maintain properties such as velocity
GameObject go = UnityEngine.Object.Instantiate(dtObj.gameObject, dtObj.transform.parent);
DestructibleObject newObj = go.GetComponent <DestructibleObject>();
// Apply the new clipped polygon
newObj.ApplyTransformedPolygonList(polygroup);
// Add it to the objectList, but not until after finished processing this explosion
pendingAdditions.Add(newObj);
continue;
}
else
{
// Reuse the existing GameObject by applying the new clipped polygon to it
dtObj.ApplyTransformedPolygonList(polygroup);
continue;
}
}
}
}
// Delete any entries that were set to null
for (int i = 0; i < dtObjectList.Count; ++i)
{
if (dtObjectList[i] == null)
{
dtObjectList.RemoveAt(i--);
}
}
// Add pendingAdditions elements to objectList so that they are included when processing the next explosion in explosions
dtObjectList.AddRange(pendingAdditions);
pendingAdditions.Clear();
}