Commit d4a24c6d authored by Benedikt Zoennchen's avatar Benedikt Zoennchen

implemented the FMM on uniform triangulation

parent 622b0812
......@@ -24,21 +24,37 @@ import java.util.stream.StreamSupport;
*/
public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
public static <P extends IPoint> Face<P> of(P p1, P p2, P p3) {
public static <P extends IPoint> Face<P> of(P x, P y, P z) {
Face superTriangle = new Face();
HalfEdge edge1 = new HalfEdge(p1, superTriangle);
HalfEdge edge2 = new HalfEdge(p2, superTriangle);
HalfEdge edge3 = new HalfEdge(p3, superTriangle);
edge1.setNext(edge2);
edge2.setNext(edge3);
edge3.setNext(edge1);
superTriangle.setEdge(edge1);
Face borderFace = new Face(true);
HalfEdge xy = new HalfEdge(y, superTriangle);
HalfEdge yz = new HalfEdge(z, superTriangle);
HalfEdge zx = new HalfEdge(x, superTriangle);
xy.setNext(yz);
yz.setNext(zx);
zx.setNext(xy);
HalfEdge yx = new HalfEdge(x, borderFace);
HalfEdge zy = new HalfEdge(y, borderFace);
HalfEdge xz = new HalfEdge(z, borderFace);
yx.setNext(xz);
xz.setNext(zy);
zy.setNext(yx);
xy.setTwin(yx);
yz.setTwin(zy);
zx.setTwin(xz);
superTriangle.setEdge(xy);
borderFace.setEdge(yx);
return superTriangle;
}
public static <P extends IPoint> Face<P> getBorder(Class<P> p) {
return new Face<>();
return new Face<>(true);
}
/**
......@@ -46,6 +62,8 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
*/
private HalfEdge<P> edge;
private boolean border;
/**
* Default constructor. To construct a face where you have already some half-edges
* bordering this face.
......@@ -53,6 +71,11 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
* @param edge one of the half-edges bordering this face.
*/
public Face(@NotNull final HalfEdge<P> edge) {
this(edge, false);
}
public Face(@NotNull final HalfEdge<P> edge, boolean border) {
this.border = border;
this.edge = edge;
}
......@@ -60,10 +83,21 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
* This constructor can be used for constructing a new face without having
* constructed the bordering half-edges jet.
*/
public Face() {}
public Face(boolean border) {
this.border = border;
}
public Face() {
this.border = false;
}
public boolean isBorder() {
return border;
}
/**
* Sets one of the half-edges bordering this face.
*
* @param edge half-edge bordering this face
*/
public void setEdge(@NotNull HalfEdge<P> edge) {
......@@ -76,6 +110,7 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
/**
* Computes the area of this face.
*
* @return the area of this face
*/
public double getArea() {
......@@ -90,10 +125,21 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
return streamPoints().collect(Collectors.toList());
}
/**
* Returns true if and only if the point contained in this face.
*
* @param point the point which might be contained
* @return true if and only if the point contained in this face.
*/
public boolean contains(final P point) {
return toPolygon().contains(point);
}
/**
* Transforms this face into a Polygon object.
*
* @return the Polygon object defined by this face
*/
public VPolygon toPolygon() {
Path2D path2D = new Path2D.Double();
path2D.moveTo(edge.getPrevious().getEnd().getX(), edge.getPrevious().getEnd().getY());
......@@ -103,6 +149,12 @@ public class Face<P extends IPoint> implements Iterable<HalfEdge<P>> {
return new VPolygon(path2D);
}
/**
* Transforms this face into a triangle. Assumption: The face is a valid triangle.
*
* @throws IllegalArgumentException if the face does not define a valid triangle
* @return a triangle which is defined by this face
*/
public VTriangle toTriangle() {
List<HalfEdge<P>> edges = getEdges();
if(edges.size() != 3) {
......
......@@ -11,6 +11,6 @@ public interface Triangulation<P extends IPoint> {
Face<P> locate(final IPoint point);
Stream<Face<P>> streamFaces();
Set<Face<P>> getFaces();
void insert(final P point);
HalfEdge<P> insert(final P point);
void remove(final P point);
}
......@@ -4,6 +4,7 @@ import org.apache.commons.lang3.tuple.Triple;
import org.junit.Before;
import org.junit.Test;
import org.vadere.util.geometry.data.DAG;
import org.vadere.util.geometry.data.HalfEdge;
import org.vadere.util.triangulation.DelaunayTriangulation;
import org.vadere.util.triangulation.DAGElement;
import org.vadere.util.geometry.data.Face;
......@@ -48,6 +49,7 @@ public class TestBoyerWatson {
triangulation.forEach(System.out::print);
}
/* TODO: reimplement it
@Test
public void testSplit() {
VPoint p1 = new VPoint(0,0);
......@@ -64,11 +66,11 @@ public class TestBoyerWatson {
DAG<DAGElement<VPoint>> dag = new DAG<>(new DAGElement<>(face, Triple.of(p1,p2,p3)));
DelaunayTriangulation<VPoint> boyerWatsonImproved = new DelaunayTriangulation<>(points, (x, y) -> new VPoint(x, y));
DAG<DAGElement<VPoint>> result = boyerWatsonImproved.split(centerPoint, dag);
HalfEdge<VPoint> result = boyerWatsonImproved.split(centerPoint, dag);
Set<VTriangle> triangulation = new HashSet<>(result.collectLeafs().stream().map(dagElement -> dagElement.getTriangle()).collect(Collectors.toList()));
Set<VTriangle> expectedResult = new HashSet<>(Arrays.asList(new VTriangle(p1, p2, centerPoint), new VTriangle(p2, p3, centerPoint), new VTriangle(p1, p3, centerPoint)));
assertTrue(testTriangulationEquality(triangulation, expectedResult));
}
}*/
@Test
public void testPerformance() {
......
......@@ -11,6 +11,7 @@ import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import static org.junit.Assert.assertEquals;
......@@ -101,7 +102,6 @@ public class TestFace {
assertEquals(incidentFaces.size(), 3);
}
@Test
public void testPointIterator() {
assertEquals(Arrays.asList(y, z, x), mesh.getVertices(face1));
......
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