本文整理汇总了Java中org.apache.commons.math3.geometry.euclidean.threed.Vector3D.getNormSq方法的典型用法代码示例。如果您正苦于以下问题：Java Vector3D.getNormSq方法的具体用法？Java Vector3D.getNormSq怎么用？Java Vector3D.getNormSq使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.commons.math3.geometry.euclidean.threed.Vector3D的用法示例。
在下文中一共展示了Vector3D.getNormSq方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: intersect
import org.apache.commons.math3.geometry.euclidean.threed.Vector3D; //导入方法依赖的package包/类
/**
* Determine point of intersection with another arc
*
* @return point of intersection, or null if there is no unique intersection
*/
public GeoPoint intersect(GeoArc arcB) {
GeoArc arcA = this;
// If either arc is zero-length, no solution exists
if (arcA.length() < TOLERANCE) return null;
if (arcB.length() < TOLERANCE) return null;
// Convert points to cartesian
Vector3D p1 = arcA.pointA.toCartesian();
Vector3D p2 = arcA.pointB.toCartesian();
Vector3D p3 = arcB.pointA.toCartesian();
Vector3D p4 = arcB.pointB.toCartesian();
// Determine planes on which arcs lie
Vector3D vA = Vector3D.crossProduct(p1, p2);
Vector3D vB = Vector3D.crossProduct(p3, p4);
// Zero vector indicates antipodal points, which have no solution
if (vA.getNormSq() <= 0) return null;
if (vB.getNormSq() <= 0) return null;
// Determine line where planes intersect (which lies between points of circle intersection)
Vector3D v = Vector3D.crossProduct(vA.normalize(), vB.normalize());
double vLenSq = v.getNormSq();
// Zero vector indicates arcs on the same plane, which would have infinite solutions
if (vLenSq <= 0) return null;
// Normalize to unit length, which will result in a point on the sphere surface
v = v.scalarMultiply(1 / Math.sqrt(vLenSq));
// Convert the intersection points from cartesian to GeoPoint
GeoPoint s1 = new GeoPoint(v);
GeoPoint s2 = new GeoPoint(v.negate());
// If one of the points lies on both arcs, it is the solution
if (arcA.contains(s1) && arcB.contains(s1)) {
return s1;
}
if (arcA.contains(s2) && arcB.contains(s2)) {
return s2;
}
return null;
}