package org.geogebra.common.kernel.commands;
import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoPoint;
import org.geogebra.common.kernel.geos.GeoVector;
import org.geogebra.common.kernel.kernelND.GeoPointND;
import org.geogebra.common.kernel.kernelND.GeoVectorND;
import org.geogebra.common.main.MyError;
/**
* Ray[ <GeoPoint>, <GeoPoint> ] Ray[ <GeoPoint>, <GeoVector> ]
*/
public class CmdRay extends CommandProcessor {
/**
* Creates new command processor
*
* @param kernel
* kernel
*/
public CmdRay(Kernel kernel) {
super(kernel);
}
@Override
public GeoElement[] process(Command c) throws MyError {
int n = c.getArgumentNumber();
boolean[] ok = new boolean[n];
GeoElement[] arg;
switch (n) {
case 2:
arg = resArgs(c);
// line through two points
if ((ok[0] = (arg[0].isGeoPoint()))
&& (ok[1] = (arg[1].isGeoPoint()))) {
GeoElement[] ret = { ray(c.getLabel(), (GeoPointND) arg[0],
(GeoPointND) arg[1]) };
return ret;
}
// line through point with direction vector
else if ((ok[0] = (arg[0].isGeoPoint()))
&& (ok[1] = (arg[1].isGeoVector()))) {
GeoElement[] ret = { ray(c.getLabel(), (GeoPointND) arg[0],
(GeoVectorND) arg[1]) };
return ret;
}
// syntax error
else {
if (!ok[0]) {
throw argErr(app, c, arg[0]);
}
throw argErr(app, c, arg[1]);
}
default:
throw argNumErr(app, c, n);
}
}
/**
* @param label
* label
* @param a
* first point
* @param b
* second point
* @return [ab)
*/
protected GeoElement ray(String label, GeoPointND a, GeoPointND b) {
return getAlgoDispatcher().ray(label, (GeoPoint) a, (GeoPoint) b);
}
/**
* @param label
* label
* @param a
* first point
* @param v
* vector direction
* @return [av)
*/
protected GeoElement ray(String label, GeoPointND a, GeoVectorND v) {
return getAlgoDispatcher().ray(label, (GeoPoint) a, (GeoVector) v);
}
}