package org.geogebra.common.kernel.commands;
import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.Transform;
import org.geogebra.common.kernel.TransformShearOrStretch;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoLine;
import org.geogebra.common.kernel.geos.GeoNumeric;
import org.geogebra.common.kernel.geos.GeoVec3D;
import org.geogebra.common.kernel.geos.GeoVector;
import org.geogebra.common.main.MyError;
/**
* Stretch[<Object>,<Line>,<Ratio>]
*/
public class CmdStretch extends CommandProcessor {
/**
* Create new command processor
*
* @param kernel
* kernel
*/
public CmdStretch(Kernel kernel) {
super(kernel);
}
@Override
final public GeoElement[] process(Command c) throws MyError {
String label = c.getLabel();
int n = c.getArgumentNumber();
GeoElement[] arg;
GeoElement[] ret;
switch (n) {
case 2:
arg = resArgs(c);
if (arg[1] instanceof GeoVector) {
if (arg[0].isMatrixTransformable() || arg[0].isGeoFunction()
|| arg[0].isGeoPolygon() || arg[0].isGeoList()) {
ret = Stretch(label, arg[0], (GeoVec3D) arg[1], null);
return ret;
}
throw argErr(app, c, arg[0]);
}
throw argErr(app, c, arg[1]);
case 3:
arg = resArgs(c);
if ((arg[1] instanceof GeoLine) && arg[2].isGeoNumeric()) {
if (arg[0].isMatrixTransformable() || arg[0].isGeoFunction()
|| arg[0].isGeoPolygon() || arg[0].isGeoList()) {
ret = Stretch(label, arg[0], (GeoVec3D) arg[1],
(GeoNumeric) arg[2]);
return ret;
}
throw argErr(app, c, arg[0]);
}
if (!(arg[1] instanceof GeoVec3D)) {
throw argErr(app, c, arg[1]);
}
throw argErr(app, c, arg[2]);
default:
throw argNumErr(app, c, n);
}
}
/**
* apply matrix Michael Borcherds 2010-05-27
*/
final private GeoElement[] Stretch(String label, GeoElement Q, GeoVec3D l,
GeoNumeric num) {
Transform t = new TransformShearOrStretch(cons, l, num, false);
return t.transform(Q, label);
}
}