/// <summary>
/// Split faces so that none face is intercepted by a face of other object
/// </summary>
/// <param name="compareObject">the other object 3d used to make the split</param>
public void SplitFaces(Object3D compareObject)
{
Line line;
Face thisFace, compareFace;
Segment segment1;
Segment segment2;
double v1DistToCompareFace, distFace1Vert2, distFace1Vert3, distFace2Vert1, distFace2Vert2, distFace2Vert3;
int signFace1Vert1, signFace1Vert2, signFace1Vert3, signFace2Vert1, signFace2Vert2, signFace2Vert3;
int numFacesBefore = this.GetNumFaces();
int numFacesStart = this.GetNumFaces();
//if the objects bounds overlap...
if (this.GetBound().Overlap(compareObject.GetBound()))
{
//for each object1 face...
for (int thisFaceIndex = 0; thisFaceIndex < this.GetNumFaces(); thisFaceIndex++)
{
//if object1 face bound and object2 bound overlap ...
thisFace = GetFace(thisFaceIndex);
if (thisFace.GetBound().Overlap(compareObject.GetBound()))
{
//for each object2 face...
for (int compareFaceIndex = 0; compareFaceIndex < compareObject.GetNumFaces(); compareFaceIndex++)
{
//if object1 face bound and object2 face bound overlap...
compareFace = compareObject.GetFace(compareFaceIndex);
if (thisFace.GetBound().Overlap(compareFace.GetBound()))
{
//PART I - DO TWO POLIGONS INTERSECT?
//POSSIBLE RESULTS: INTERSECT, NOT_INTERSECT, COPLANAR
//distance from the face1 vertices to the face2 plane
v1DistToCompareFace = ComputeDistance(thisFace.v1, compareFace);
distFace1Vert2 = ComputeDistance(thisFace.v2, compareFace);
distFace1Vert3 = ComputeDistance(thisFace.v3, compareFace);
//distances signs from the face1 vertices to the face2 plane
signFace1Vert1 = (v1DistToCompareFace > EqualityTolerance ? 1 : (v1DistToCompareFace < -EqualityTolerance ? -1 : 0));
signFace1Vert2 = (distFace1Vert2 > EqualityTolerance ? 1 : (distFace1Vert2 < -EqualityTolerance ? -1 : 0));
signFace1Vert3 = (distFace1Vert3 > EqualityTolerance ? 1 : (distFace1Vert3 < -EqualityTolerance ? -1 : 0));
//if all the signs are zero, the planes are coplanar
//if all the signs are positive or negative, the planes do not intersect
//if the signs are not equal...
if (!(signFace1Vert1 == signFace1Vert2 && signFace1Vert2 == signFace1Vert3))
{
//distance from the face2 vertices to the face1 plane
distFace2Vert1 = ComputeDistance(compareFace.v1, thisFace);
distFace2Vert2 = ComputeDistance(compareFace.v2, thisFace);
distFace2Vert3 = ComputeDistance(compareFace.v3, thisFace);
//distances signs from the face2 vertices to the face1 plane
signFace2Vert1 = (distFace2Vert1 > EqualityTolerance ? 1 : (distFace2Vert1 < -EqualityTolerance ? -1 : 0));
signFace2Vert2 = (distFace2Vert2 > EqualityTolerance ? 1 : (distFace2Vert2 < -EqualityTolerance ? -1 : 0));
signFace2Vert3 = (distFace2Vert3 > EqualityTolerance ? 1 : (distFace2Vert3 < -EqualityTolerance ? -1 : 0));
//if the signs are not equal...
if (!(signFace2Vert1 == signFace2Vert2 && signFace2Vert2 == signFace2Vert3))
{
line = new Line(thisFace, compareFace);
//intersection of the face1 and the plane of face2
segment1 = new Segment(line, thisFace, signFace1Vert1, signFace1Vert2, signFace1Vert3);
//intersection of the face2 and the plane of face1
segment2 = new Segment(line, compareFace, signFace2Vert1, signFace2Vert2, signFace2Vert3);
//if the two segments intersect...
if (segment1.Intersect(segment2))
{
//PART II - SUBDIVIDING NON-COPLANAR POLYGONS
int lastNumFaces = GetNumFaces();
bool splitOccured = this.SplitFace(thisFaceIndex, segment1, segment2);
//prevent from infinite loop (with a loss of faces...)
if (GetNumFaces() > numFacesStart * 100)
{
//System.out.println("possible infinite loop situation: terminating faces split");
//return;
int a = 0;
}
//if the face in the position isn't the same, there was a break
if (splitOccured &&
thisFace != GetFace(thisFaceIndex))
{
//if the generated solid is equal the origin...
if (thisFace.Equals(GetFace(GetNumFaces() - 1)))
{
//return it to its position and jump it
if (thisFaceIndex != (GetNumFaces() - 1))
{
faces.RemoveAt(GetNumFaces() - 1);
faces.Insert(thisFaceIndex, thisFace);
}
else
{
continue;
}
}
//else: test next face
else
{
thisFaceIndex--;
break;
}
}
}
}
}
}
}
}
}
}
}
/// <summary>
/// Split faces so that no face is intercepted by a face of other object
/// </summary>
/// <param name="compareObject">the other object 3d used to make the split</param>
public void SplitFaces(CsgObject3D compareObject, CancellationToken cancellationToken,
Action <CsgFace, CsgFace> splitFaces = null,
Action <List <CsgFace> > results = null)
{
Stack <CsgFace> newFacesFromSplitting = new Stack <CsgFace>();
int numFacesStart = this.Faces.Count;
//if the objects bounds overlap...
//for each object1 face...
var bounds = compareObject.GetBound();
Faces.SearchBounds(bounds);
foreach (var thisFaceIn in Faces.QueryResults) // put it in an array as we will be adding new faces to it
{
newFacesFromSplitting.Push(thisFaceIn);
// make sure we process every face that we have added during splitting before moving on to the next face
while (newFacesFromSplitting.Count > 0)
{
var faceToSplit = newFacesFromSplitting.Pop();
// stop processing if operation has been canceled
cancellationToken.ThrowIfCancellationRequested();
//if object1 face bound and object2 bound overlap ...
//for each object2 face...
compareObject.Faces.SearchBounds(faceToSplit.GetBound());
foreach (var cuttingFace in compareObject.Faces.QueryResults)
{
//if object1 face bound and object2 face bound overlap...
//PART I - DO TWO POLIGONS INTERSECT?
//POSSIBLE RESULTS: INTERSECT, NOT_INTERSECT, COPLANAR
//distance from the face1 vertices to the face2 plane
double v1DistToCuttingFace = cuttingFace.DistanceFromPlane(faceToSplit.v1);
double v2DistToCuttingFace = cuttingFace.DistanceFromPlane(faceToSplit.v2);
double v3DistToCuttingFace = cuttingFace.DistanceFromPlane(faceToSplit.v3);
//distances signs from the face1 vertices to the face2 plane
PlaneSide sideFace1Vert1 = (v1DistToCuttingFace > EqualityTolerance ? PlaneSide.Front : (v1DistToCuttingFace < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
PlaneSide sideFace1Vert2 = (v2DistToCuttingFace > EqualityTolerance ? PlaneSide.Front : (v2DistToCuttingFace < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
PlaneSide sideFace1Vert3 = (v3DistToCuttingFace > EqualityTolerance ? PlaneSide.Front : (v3DistToCuttingFace < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
//if all the signs are zero, the planes are coplanar
//if all the signs are positive or negative, the planes do not intersect
//if the signs are not equal...
if (!(sideFace1Vert1 == sideFace1Vert2 && sideFace1Vert2 == sideFace1Vert3))
{
//distance from the face2 vertices to the face1 plane
double faceToSplitTo1 = faceToSplit.DistanceFromPlane(cuttingFace.v1);
double faceToSplitTo2 = faceToSplit.DistanceFromPlane(cuttingFace.v2);
double faceToSplitTo3 = faceToSplit.DistanceFromPlane(cuttingFace.v3);
//distances signs from the face2 vertices to the face1 plane
PlaneSide signFace2Vert1 = (faceToSplitTo1 > EqualityTolerance ? PlaneSide.Front : (faceToSplitTo1 < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
PlaneSide signFace2Vert2 = (faceToSplitTo2 > EqualityTolerance ? PlaneSide.Front : (faceToSplitTo2 < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
PlaneSide signFace2Vert3 = (faceToSplitTo3 > EqualityTolerance ? PlaneSide.Front : (faceToSplitTo3 < -EqualityTolerance ? PlaneSide.Back : PlaneSide.On));
//if the signs are not equal...
if (!(signFace2Vert1 == signFace2Vert2 && signFace2Vert2 == signFace2Vert3))
{
var line = new Line(faceToSplit, cuttingFace);
//intersection of the face1 and the plane of face2
var segment1 = new Segment(line, faceToSplit, sideFace1Vert1, sideFace1Vert2, sideFace1Vert3);
//intersection of the face2 and the plane of face1
var segment2 = new Segment(line, cuttingFace, signFace2Vert1, signFace2Vert2, signFace2Vert3);
//if the two segments intersect...
if (segment1.Intersect(segment2))
{
//PART II - SUBDIVIDING NON-COPLANAR POLYGONS
Stack <CsgFace> facesFromSplit = new Stack <CsgFace>();
if (this.SplitFace(faceToSplit, segment1, segment2, facesFromSplit) &&
facesFromSplit.Count > 0 &&
!(facesFromSplit.Count == 1 && facesFromSplit.Peek().Equals(faceToSplit)))
{
foreach (var face in facesFromSplit)
{
newFacesFromSplitting.Push(face);
}
// send debugging information if registered
splitFaces?.Invoke(faceToSplit, cuttingFace);
results?.Invoke(facesFromSplit.ToList());
break;
}
}
}
}
}
}
}
}
/// <summary>
/// Split faces so that none face is intercepted by a face of other object
/// </summary>
/// <param name="obj">the other object 3d used to make the split</param>
public void SplitFaces(Object3D obj)
{
Line line;
Face face1, face2;
Segment segment1;
Segment segment2;
double distFace1Vert1, distFace1Vert2, distFace1Vert3, distFace2Vert1, distFace2Vert2, distFace2Vert3;
int signFace1Vert1, signFace1Vert2, signFace1Vert3, signFace2Vert1, signFace2Vert2, signFace2Vert3;
int numFacesBefore = NumFaces;
int numFacesStart = NumFaces;
//if the objects bounds overlap...
if (_Bound.Overlap(obj._Bound))
{
//for each object1 face...
for (int i = 0; i < NumFaces; i++)
{
//if object1 face bound and object2 bound overlap ...
face1 = GetFace(i);
if (face1.GetBound().Overlap(obj._Bound))
{
//for each object2 face...
for (int j = 0; j < obj.NumFaces; j++)
{
//if object1 face bound and object2 face bound overlap...
face2 = obj.GetFace(j);
if (face1.GetBound().Overlap(face2.GetBound()))
{
//PART I - DO TWO POLIGONS INTERSECT?
//POSSIBLE RESULTS: INTERSECT, NOT_INTERSECT, COPLANAR
//distance from the face1 vertices to the face2 plane
distFace1Vert1 = ComputeDistance(face1.V1, face2);
distFace1Vert2 = ComputeDistance(face1.V2, face2);
distFace1Vert3 = ComputeDistance(face1.V3, face2);
//distances signs from the face1 vertices to the face2 plane
signFace1Vert1 = (distFace1Vert1 > EqualityTolerance ? 1 : (distFace1Vert1 < -EqualityTolerance ? -1 : 0));
signFace1Vert2 = (distFace1Vert2 > EqualityTolerance ? 1 : (distFace1Vert2 < -EqualityTolerance ? -1 : 0));
signFace1Vert3 = (distFace1Vert3 > EqualityTolerance ? 1 : (distFace1Vert3 < -EqualityTolerance ? -1 : 0));
//if all the signs are zero, the planes are coplanar
//if all the signs are positive or negative, the planes do not intersect
//if the signs are not equal...
if (!(signFace1Vert1 == signFace1Vert2 && signFace1Vert2 == signFace1Vert3))
{
//distance from the face2 vertices to the face1 plane
distFace2Vert1 = ComputeDistance(face2.V1, face1);
distFace2Vert2 = ComputeDistance(face2.V2, face1);
distFace2Vert3 = ComputeDistance(face2.V3, face1);
//distances signs from the face2 vertices to the face1 plane
signFace2Vert1 = (distFace2Vert1 > EqualityTolerance ? 1 : (distFace2Vert1 < -EqualityTolerance ? -1 : 0));
signFace2Vert2 = (distFace2Vert2 > EqualityTolerance ? 1 : (distFace2Vert2 < -EqualityTolerance ? -1 : 0));
signFace2Vert3 = (distFace2Vert3 > EqualityTolerance ? 1 : (distFace2Vert3 < -EqualityTolerance ? -1 : 0));
//if the signs are not equal...
if (!(signFace2Vert1 == signFace2Vert2 && signFace2Vert2 == signFace2Vert3))
{
line = new Line(face1, face2);
//intersection of the face1 and the plane of face2
segment1 = new Segment(line, face1, signFace1Vert1, signFace1Vert2, signFace1Vert3);
//intersection of the face2 and the plane of face1
segment2 = new Segment(line, face2, signFace2Vert1, signFace2Vert2, signFace2Vert3);
//if the two segments intersect...
if (segment1.Intersect(segment2))
{
//PART II - SUBDIVIDING NON-COPLANAR POLYGONS
int lastNumFaces = NumFaces;
SplitFace(i, segment1, segment2);
//prevent from infinite loop (with a loss of faces...)
//if(numFacesStart*20<getNumFaces())
//{
// System.out.println("possible infinite loop situation: terminating faces split");
// return;
//}
//if the face in the position isn't the same, there was a break
if (face1 != GetFace(i))
{
//if the generated solid is equal the origin...
if (face1.Equals(GetFace(NumFaces - 1)))
{
//return it to its position and jump it
if (i != (NumFaces - 1))
{
Faces.RemoveAt(NumFaces - 1);
Faces.Insert(i, face1);
}
else
{
continue;
}
}
//else: test next face
else
{
i--;
break;
}
}
}
}
}
}
}
}
}
}
}