/**
* Finds intersections of the given line segment with this shape. Intersection points will be
* appended to the given list.
*
* @param line the line segment
* @param intersections the list of intersections
* @return the number of intersections that were found
*/
public int intersectionSegment(final Line3D line, List<Point3D> intersections) {
int count = 0;
int nFaces = meshFaces.length / 3;
Triangle3D face = new Triangle3D();
for (int f = 0; f < nFaces; f++) {
this.getFace(f, face);
count += face.intersectionSegment(line, intersections);
}
return count;
}
/**
* Returns true if the infinite line intersects this shape.
*
* @param line the infinite line
* @return true if the line intersects the shape
*/
public boolean hasIntersection(Line3D line) {
List<Point3D> list = new ArrayList();
int count = 0;
int nFaces = meshFaces.length / 3;
Triangle3D face = new Triangle3D();
for (int f = 0; f < nFaces; f++) {
this.getFace(f, face);
if (face.intersection(line, list) > 0) return true;
}
return false;
}
public void getFace(int face, Triangle3D tri) {
int start = face * 3;
int index1 = 3 * meshFaces[start];
int index2 = 3 * meshFaces[start + 1];
int index3 = 3 * meshFaces[start + 2];
tri.set(
meshPoints[index1],
meshPoints[index1 + 1],
meshPoints[index1 + 2],
meshPoints[index2],
meshPoints[index2 + 1],
meshPoints[index2 + 2],
meshPoints[index3],
meshPoints[index3 + 1],
meshPoints[index3 + 2]);
}
