//-------------------------FACES_SPLITTING_METHODS------------------------------//
/**
* Split faces so that none face is intercepted by a face of other object
*
* @param object the other object 3d used to make the split
*/
public void splitFaces(Object3D obj)
{
Line line;
Face face1, face2;
Segment[] segments;
Segment segment1;
Segment segment2;
double distFace1Vert1, distFace1Vert2, distFace1Vert3, distFace2Vert1, distFace2Vert2, distFace2Vert3;
int signFace1Vert1, signFace1Vert2, signFace1Vert3, signFace2Vert1, signFace2Vert2, signFace2Vert3;
int numFacesBefore = getNumFaces();
int numFacesStart = getNumFaces();
int facesIgnored = 0;
//if the objects bounds overlap...
if (getBound().overlap(obj.getBound()))
{
//for each object1 face...
for (int i = 0; i < getNumFaces(); i++)
{
//if object1 face bound and object2 bound overlap ...
face1 = getFace(i);
if (face1.getBound().overlap(obj.getBound()))
{
//for each object2 face...
for (int j = 0; j < obj.getNumFaces(); 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 > TOL ? 1 : (distFace1Vert1 < -TOL ? -1 : 0));
signFace1Vert2 = (distFace1Vert2 > TOL ? 1 : (distFace1Vert2 < -TOL ? -1 : 0));
signFace1Vert3 = (distFace1Vert3 > TOL ? 1 : (distFace1Vert3 < -TOL ? -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 > TOL ? 1 : (distFace2Vert1 < -TOL ? -1 : 0));
signFace2Vert2 = (distFace2Vert2 > TOL ? 1 : (distFace2Vert2 < -TOL ? -1 : 0));
signFace2Vert3 = (distFace2Vert3 > TOL ? 1 : (distFace2Vert3 < -TOL ? -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 = getNumFaces();
this.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(getNumFaces() - 1)))
{
//return it to its position and jump it
if (i != (getNumFaces() - 1))
{
faces.RemoveAt(getNumFaces() - 1);
faces.Insert(i, face1);
}
else
{
continue;
}
}
//else: test next face
else
{
i--;
break;
}
}
}
}
}
}
}
}
}
}
}
//-------------------------FACES_SPLITTING_METHODS------------------------------//
/**
* Split faces so that none face is intercepted by a face of other object
*
* @param object the other object 3d used to make the split
*/
public void splitFaces(Object3D obj)
{
Line line;
Face face1, face2;
Segment[] segments;
Segment segment1;
Segment segment2;
double distFace1Vert1, distFace1Vert2, distFace1Vert3, distFace2Vert1, distFace2Vert2, distFace2Vert3;
int signFace1Vert1, signFace1Vert2, signFace1Vert3, signFace2Vert1, signFace2Vert2, signFace2Vert3;
int numFacesBefore = getNumFaces();
int numFacesStart = getNumFaces();
int facesIgnored = 0;
//if the objects bounds overlap...
if (getBound().overlap(obj.getBound()))
{
//for each object1 face...
for (int i = 0; i < getNumFaces(); i++)
{
//if object1 face bound and object2 bound overlap ...
face1 = getFace(i);
if (face1.getBound().overlap(obj.getBound()))
{
//for each object2 face...
for (int j = 0; j < obj.getNumFaces(); 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 > TOL ? 1 : (distFace1Vert1 < -TOL ? -1 : 0));
signFace1Vert2 = (distFace1Vert2 > TOL ? 1 : (distFace1Vert2 < -TOL ? -1 : 0));
signFace1Vert3 = (distFace1Vert3 > TOL ? 1 : (distFace1Vert3 < -TOL ? -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 > TOL ? 1 : (distFace2Vert1 < -TOL ? -1 : 0));
signFace2Vert2 = (distFace2Vert2 > TOL ? 1 : (distFace2Vert2 < -TOL ? -1 : 0));
signFace2Vert3 = (distFace2Vert3 > TOL ? 1 : (distFace2Vert3 < -TOL ? -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 = getNumFaces();
this.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(getNumFaces() - 1)))
{
//return it to its position and jump it
if (i != (getNumFaces() - 1))
{
faces.RemoveAt(getNumFaces() - 1);
faces.Insert(i, face1);
}
else
{
continue;
}
}
//else: test next face
else
{
i--;
break;
}
}
}
}
}
}
}
}
}
}
}