public static void BasicPolygroup(IPolygonSubtractor sub)
{
List <DTPolygon> subjectPolygroup = L(
P(V(-2.5f, 0.5f), V(2.5f, 0.5f), V(2.5f, 1.5f), V(-2.5f, 1.5f)),
P(V(-2.5f, -0.5f), V(2.5f, -0.5f), V(2.5f, 0.5f), V(-2.5f, 0.5f)),
P(V(-2.5f, -1.5f), V(2.5f, -1.5f), V(2.5f, -0.5f), V(-2.5f, -0.5f))
);
List <DTPolygon> clipPolygroup = L(
P(V(-1.5f, -1.5f), V(-0.5f, -1.5f), V(-0.5f, 1.5f), V(-1.5f, 1.5f)),
P(V(0.5f, -1.5f), V(1.5f, -1.5f), V(1.5f, 1.5f), V(0.5f, 1.5f))
);
List <List <DTPolygon> > expectedPolygroups = L(
L(
P(V(-2.5f, 0.5f), V(-1.5f, 0.5f), V(-1.5f, 1.5f), V(-2.5f, 1.5f)),
P(V(-2.5f, -0.5f), V(-1.5f, -0.5f), V(-1.5f, 0.5f), V(-2.5f, 0.5f)),
P(V(-2.5f, -1.5f), V(-1.5f, -1.5f), V(-1.5f, -0.5f), V(-2.5f, -0.5f))
),
L(
P(V(-0.5f, 0.5f), V(0.5f, 0.5f), V(0.5f, 1.5f), V(-0.5f, 1.5f)),
P(V(-0.5f, -0.5f), V(0.5f, -0.5f), V(0.5f, 0.5f), V(-0.5f, 0.5f)),
P(V(-0.5f, -1.5f), V(0.5f, -1.5f), V(0.5f, -0.5f), V(-0.5f, -0.5f))
),
L(
P(V(1.5f, 0.5f), V(2.5f, 0.5f), V(2.5f, 1.5f), V(1.5f, 1.5f)),
P(V(1.5f, -0.5f), V(2.5f, -0.5f), V(2.5f, 0.5f), V(1.5f, 0.5f)),
P(V(1.5f, -1.5f), V(2.5f, -1.5f), V(2.5f, -0.5f), V(1.5f, -0.5f))
)
);
// Clipper does this in a weird way and joins only the first polygroup into a single polygon
List <List <DTPolygon> > expectedPolygroupsJoinedFirst = L(
L(
P(V(-2.5f, -1.5f), V(-1.5f, -1.5f), V(-1.5f, 1.5f), V(-2.5f, 1.5f))
),
L(
P(V(-0.5f, 0.5f), V(0.5f, 0.5f), V(0.5f, 1.5f), V(-0.5f, 1.5f)),
P(V(-0.5f, -0.5f), V(0.5f, -0.5f), V(0.5f, 0.5f), V(-0.5f, 0.5f)),
P(V(-0.5f, -1.5f), V(0.5f, -1.5f), V(0.5f, -0.5f), V(-0.5f, -0.5f))
),
L(
P(V(1.5f, 0.5f), V(2.5f, 0.5f), V(2.5f, 1.5f), V(1.5f, 1.5f)),
P(V(1.5f, -0.5f), V(2.5f, -0.5f), V(2.5f, 0.5f), V(1.5f, 0.5f)),
P(V(1.5f, -1.5f), V(2.5f, -1.5f), V(2.5f, -0.5f), V(1.5f, -0.5f))
)
);
VerifyPolygroups(sub.SubtractPolygroup(subjectPolygroup, clipPolygroup), expectedPolygroups, expectedPolygroupsJoinedFirst);
}
public void ExecuteExplosions(IEnumerable <Explosion> explosions, IEnumerable <DestructibleObject> dtObjects, IPolygonSubtractor subtractor)
{
TriangleNetTriangulator.Instance.callCount = 0;
// 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)
{
for (int i = 0; i < dtObjectList.Count; i++)
{
DestructibleObject 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.RemoveAt(i--);
UnityEngine.Object.Destroy(dtObj.gameObject);
continue;
}
List <DTPolygon> inputPolygroup = dtObj.GetTransformedPolygonList();
// Subtract explosion polygon from destructible object polygon group
DTProfilerMarkers.SubtractPolygroup.Begin();
List <List <DTPolygon> > result = subtractor.SubtractPolygroup(inputPolygroup, new List <DTPolygon>()
{
exp.DTPolygon
});
DTProfilerMarkers.SubtractPolygroup.End();
int count = result.Count();
if (count == 0)
{
// If no output polygons, remove the current destrucible object
dtObjectList.RemoveAt(i--);
UnityEngine.Object.Destroy(dtObj.gameObject);
continue;
}
else
{
// Otherwise apply the output polygons (fragments) to GameObjects (new or reused)
foreach (List <DTPolygon> polygroup in result)
{
if (polygroup != result.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 list
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;
}
}
}
}
// Add pendingAdditions elements to objectList so that they are included when processing the next explosion in explosions
dtObjectList.AddRange(pendingAdditions);
pendingAdditions.Clear();
}
Debug.Log("# Objects:" + dtObjectList.Count);
Debug.Log("# Polygons:" + dtObjectList.Sum(obj => obj.GetTransformedPolygonList().Count));
Debug.Log("# Triangulation Calls:" + TriangleNetTriangulator.Instance.callCount);
}