/**
* Create a new triangle with the three given edges as a basis.
*
* <p>An integrity check is processed while building the triangle. This constructor is the best
* way to ensure that already existing edges will be linked to the good triangles, and that ther
* won't be any edge duplication in the data structures.
*
* @param e1
* @param e2
* @param e3
* @throws DelaunayError If there is at least two edges that don't share exactly a point.
*/
public DTriangle(DEdge e1, DEdge e2, DEdge e3) throws DelaunayError {
super();
init();
// We check the integrity of the edges given to build this triangle
boolean integrityE1E2 =
(e1.isExtremity(e2.getStartPoint()) && !e3.isExtremity((e2.getStartPoint())))
|| (e1.isExtremity(e2.getEndPoint()) && !e3.isExtremity(e2.getEndPoint()));
boolean integrityE1EptNb =
(e1.isExtremity(e3.getStartPoint()) && !e2.isExtremity((e3.getStartPoint())))
|| (e1.isExtremity(e3.getEndPoint()) && !e2.isExtremity(e3.getEndPoint()));
boolean integrityEptNbE2 =
(e2.isExtremity(e3.getStartPoint()) && !e1.isExtremity((e3.getStartPoint())))
|| (e2.isExtremity(e3.getEndPoint()) && !e1.isExtremity(e3.getEndPoint()));
if (integrityE1E2 && integrityE1EptNb && integrityEptNbE2) {
edges[0] = e1;
edges[1] = e2;
edges[2] = e3;
connectEdges();
computeCenter();
radius = e1.getStartPoint().squareDistance2D(xCenter, yCenter);
} else {
throw new DelaunayError(
"Problem while generating the Triangle : "
+ integrityE1E2
+ " "
+ integrityE1EptNb
+ " "
+ integrityEptNbE2);
}
}
/**
* Create a DTriangle from another triangle<br>
* NB : it doesn't update edges connection - topology is not preserved.
*
* @param aTriangle
*/
public DTriangle(DTriangle aTriangle) {
super((Element) aTriangle);
init();
System.arraycopy(aTriangle.edges, 0, edges, 0, PT_NB);
xCenter = aTriangle.xCenter;
yCenter = aTriangle.yCenter;
radius = aTriangle.radius;
}
/**
* Create a new triangle with three input points.
*
* @param p1
* @param p2
* @param p3
* @throws DelaunayError
*/
public DTriangle(DPoint p1, DPoint p2, DPoint p3) throws DelaunayError {
super();
init();
DEdge e1 = new DEdge(p1, p2);
DEdge e2 = new DEdge(p2, p3);
DEdge e3 = new DEdge(p3, p1);
edges[0] = e1;
edges[1] = e2;
edges[2] = e3;
connectEdges();
computeCenter();
radius = e1.getStartPoint().squareDistance2D(xCenter, yCenter);
}