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DJUTILS - Delft Java Utilities Drawing and animation primitives
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package org.djutils.draw.line;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Locale;
import org.djutils.draw.DrawRuntimeException;
import org.djutils.draw.Drawable3d;
import org.djutils.draw.bounds.Bounds3d;
import org.djutils.draw.point.DirectedPoint3d;
import org.djutils.draw.point.Point3d;
import org.djutils.exceptions.Throw;
/**
* LineSegment3d is a line segment bound by 2 end points in 3D-space. A line segment stores the order in which it has been
* created, so the end points are known as 'start' and 'end'.
*
* Copyright (c) 2020-2024 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
* BSD-style license. See DJUTILS License.
*
* @author Alexander Verbraeck
* @author Peter Knoppers
*/
public class LineSegment3d implements Drawable3d, LineSegment
{
/** */
private static final long serialVersionUID = 20210121L;
/** The start x-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double startX;
/** The start y-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double startY;
/** The start z-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double startZ;
/** The end x-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double endX;
/** The end y-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double endY;
/** The end z-coordinate. */
@SuppressWarnings("checkstyle:visibilitymodifier")
public final double endZ;
/**
* Construct a new LineSegment3d from six coordinates.
* @param startX double; the x-coordinate of the start point
* @param startY double; the y-coordinate of the start point
* @param startZ double; the z-coordinate of the start point
* @param endX double; the x-coordinate of the end point
* @param endY double; the y-coordinate of the end point
* @param endZ double; the z-coordinate of the end point
* @throws DrawRuntimeException when (startX,startY) is equals end (endX,endY)
*/
public LineSegment3d(final double startX, final double startY, final double startZ, final double endX, final double endY,
final double endZ) throws DrawRuntimeException
{
Throw.when(startX == endX && startY == endY && startZ == endZ, DrawRuntimeException.class,
"Start and end may not be equal");
this.startX = startX;
this.startY = startY;
this.startZ = startZ;
this.endX = endX;
this.endY = endY;
this.endZ = endZ;
}
/**
* Construct a new LineSegment3d from a Point3d and three coordinates.
* @param start Point3d; the start point
* @param endX double; the x-coordinate of the end point
* @param endY double; the y-coordinate of the end point
* @param endZ double; the z-coordinate of the end point
* @throws NullPointerException when start is null
* @throws DrawRuntimeException when start has the exact coordinates endX, endY
*/
public LineSegment3d(final Point3d start, final double endX, final double endY, final double endZ)
throws NullPointerException, DrawRuntimeException
{
this(Throw.whenNull(start, "start").x, start.y, start.z, endX, endY, endZ);
}
/**
* Construct a new LineSegment3d from three coordinates and a Point3d.
* @param startX double; the x-coordinate of the start point
* @param startY double; the y-coordinate of the start point
* @param startZ double; the z-coordinate of the start point
* @param end Point3d; the end point
* @throws NullPointerException when end is null
* @throws DrawRuntimeException when end has the exact coordinates startX, startY, startZ
*/
public LineSegment3d(final double startX, final double startY, final double startZ, final Point3d end)
throws NullPointerException, DrawRuntimeException
{
this(startX, startY, startZ, Throw.whenNull(end, "end").x, end.y, end.z);
}
/**
* Construct a new LineSegment3d from two Point3d objects.
* @param start Point3d; the start point
* @param end Point3d; the end point
* @throws NullPointerException when start is null
* @throws DrawRuntimeException when start has the exact coordinates endX, endY, endZ
*/
public LineSegment3d(final Point3d start, final Point3d end) throws NullPointerException, DrawRuntimeException
{
this(Throw.whenNull(start, "start point may not be null").x, start.y, start.z,
Throw.whenNull(end, "end point may not be null").x, end.y, end.z);
}
@Override
public Point3d getStartPoint()
{
return new Point3d(this.startX, this.startY, this.startZ);
}
@Override
public Point3d getEndPoint()
{
return new Point3d(this.endX, this.endY, this.endZ);
}
@Override
public double getLength()
{
// There is no varargs hypot function in Math
double dX = this.endX - this.startX;
double dY = this.endY - this.startY;
double dZ = this.endZ - this.startZ;
return Math.sqrt(dX * dX + dY * dY + dZ * dZ);
}
@Override
public Iterator getPoints()
{
return Arrays.stream(new Point3d[] {getStartPoint(), getEndPoint()}).iterator();
}
@Override
public int size()
{
return 2;
}
@Override
public Bounds3d getBounds()
{
return new Bounds3d(Math.min(this.startX, this.endX), Math.max(this.startX, this.endX),
Math.min(this.startY, this.endY), Math.max(this.startY, this.endY), Math.min(this.startZ, this.endZ),
Math.max(this.startZ, this.endZ));
}
@Override
public LineSegment2d project() throws DrawRuntimeException
{
return new LineSegment2d(this.startX, this.startY, this.endX, this.endY);
}
@Override
public DirectedPoint3d getLocationExtended(final double position) throws DrawRuntimeException
{
Throw.when(Double.isNaN(position) || Double.isInfinite(position), DrawRuntimeException.class,
"position must be finite");
double dX = this.endX - this.startX;
double dY = this.endY - this.startY;
double dZ = this.endZ - this.startZ;
double length = Math.sqrt(dX * dX + dY * dY + dZ * dZ);
return new DirectedPoint3d(this.startX + position * dX / length, this.startY + position * dY / length,
this.startZ + position * dZ / length, Math.atan2(dZ, Math.hypot(dX, dY)), Math.atan2(dY, dX));
}
@Override
public Point3d closestPointOnSegment(final Point3d point)
{
Throw.whenNull(point, "point");
return point.closestPointOnLine(this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ, true, true);
}
@Override
public LineSegment3d reverse()
{
return new LineSegment3d(this.endX, this.endY, this.endZ, this.startX, this.startY, this.startZ);
}
@Override
public Point3d projectOrthogonal(final Point3d point) throws NullPointerException
{
Throw.whenNull(point, "point");
return point.closestPointOnLine(this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ, null, null);
}
@Override
public Point3d projectOrthogonalExtended(final Point3d point) throws NullPointerException
{
Throw.whenNull(point, "point");
return point.closestPointOnLine(this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ);
}
@Override
public double projectOrthogonalFractional(final Point3d point) throws NullPointerException
{
Throw.whenNull(point, "point");
return point.fractionalPositionOnLine(this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ, null,
null);
}
@Override
public double projectOrthogonalFractionalExtended(final Point3d point) throws NullPointerException
{
Throw.whenNull(point, "point");
return point.fractionalPositionOnLine(this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ, false,
false);
}
@Override
public String toString()
{
return toString("%f", false);
}
@Override
public String toString(final String doubleFormat, final boolean doNotIncludeClassName)
{
String format = String.format("%1$s[startX=%2$s, startY=%2$s, startZ=%2$s - endX=%2%s, endY=%2$s, endZ=%2$s]",
doNotIncludeClassName ? "" : "LineSegment3d ", doubleFormat);
return String.format(Locale.US, format, this.startX, this.startY, this.startZ, this.endX, this.endY, this.endZ);
}
@Override
public int hashCode()
{
final int prime = 31;
int result = 1;
long temp;
temp = Double.doubleToLongBits(this.endX);
result = prime * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.endY);
result = prime * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.endZ);
result = prime * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.startX);
result = prime * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.startY);
result = prime * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.startZ);
result = prime * result + (int) (temp ^ (temp >>> 32));
return result;
}
@Override
@SuppressWarnings("checkstyle:needbraces")
public boolean equals(final Object obj)
{
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
LineSegment3d other = (LineSegment3d) obj;
if (Double.doubleToLongBits(this.endX) != Double.doubleToLongBits(other.endX))
return false;
if (Double.doubleToLongBits(this.endY) != Double.doubleToLongBits(other.endY))
return false;
if (Double.doubleToLongBits(this.endZ) != Double.doubleToLongBits(other.endZ))
return false;
if (Double.doubleToLongBits(this.startX) != Double.doubleToLongBits(other.startX))
return false;
if (Double.doubleToLongBits(this.startY) != Double.doubleToLongBits(other.startY))
return false;
if (Double.doubleToLongBits(this.startZ) != Double.doubleToLongBits(other.startZ))
return false;
return true;
}
}