CmdPlane.java

package org.geogebra.common.geogebra3D.kernel3D.commands;

import org.geogebra.common.geogebra3D.kernel3D.algos.AlgoDependentVector3D;
import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.arithmetic.Equation;
import org.geogebra.common.kernel.arithmetic.ExpressionNode;
import org.geogebra.common.kernel.commands.CommandProcessor;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.kernelND.GeoCoordSys2D;
import org.geogebra.common.kernel.kernelND.GeoLineND;
import org.geogebra.common.kernel.kernelND.GeoPointND;
import org.geogebra.common.main.MyError;
import org.geogebra.common.plugin.Operation;

/**
 * Plane command
 *
 */
public class CmdPlane extends CommandProcessor {
	/**
	 * @param kernel
	 *            Kernel
	 */
	public CmdPlane(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 1:
			if (c.getArgument(0).unwrap() instanceof Equation) {
				((Equation) c.getArgument(0).unwrap()).setForcePlane();
			}
			arg = resArgs(c);
			if (arg[0] instanceof GeoCoordSys2D) {
				GeoElement[] ret = { (GeoElement) kernelA.getManager3D()
						.Plane3D(c.getLabel(), (GeoCoordSys2D) arg[0]) };
				return ret;
			}

			throw argErr(app, c, arg[0]);
		case 2:
			arg = resArgs(c);
			if ((ok[0] = (arg[0].isGeoPoint()))
					&& (ok[1] = (arg[1] instanceof GeoLineND))) {
				GeoElement[] ret = { (GeoElement) kernelA.getManager3D()
						.Plane3D(c.getLabel(), (GeoPointND) arg[0],
								(GeoLineND) arg[1]) };
				return ret;
			} else if ((ok[0] = (arg[0].isGeoPoint()))
					&& (ok[1] = (arg[1] instanceof GeoCoordSys2D))) {
				GeoElement[] ret = { (GeoElement) kernelA.getManager3D()
						.Plane3D(c.getLabel(), (GeoPointND) arg[0],
								(GeoCoordSys2D) arg[1]) };
				return ret;
			} else if ((ok[0] = (arg[0].isGeoLine()))
					&& (ok[1] = (arg[1].isGeoLine()))) {
				GeoElement[] ret = { kernelA.getManager3D().Plane3D(
						c.getLabel(), (GeoLineND) arg[0], (GeoLineND) arg[1]) };
				return ret;

			} else {
				if (!ok[0]) {
					throw argErr(app, c, arg[0]);
				}
				throw argErr(app, c, arg[1]);
			}

		case 3:
			arg = resArgs(c);
			if ((ok[0] = (arg[0].isGeoPoint()))
					&& (ok[1] = (arg[1].isGeoPoint()))
					&& (ok[2] = (arg[2].isGeoPoint()))) {
				GeoElement[] ret = { kernelA.getManager3D().Plane3D(
						c.getLabel(), (GeoPointND) arg[0], (GeoPointND) arg[1],
						(GeoPointND) arg[2]) };
				return ret;
			}

			// implement Plane[(1,2,3),Vector[(3,-3,1)],Vector[(2,2,-1)]] as
			// shortcut/macro for
			// PerpendicularPlane[(1,2,3),Vector[(3,-3,1)]\u2297Vector[(2,2,-1)]]
			if ((ok[0] = (arg[0].isGeoPoint()))
					&& (ok[1] = (arg[1].isGeoVector()))
					&& (ok[2] = (arg[2].isGeoVector()))) {
				ExpressionNode cross = new ExpressionNode(kernelA, arg[1],
						Operation.VECTORPRODUCT, arg[2]);

				AlgoDependentVector3D algo = new AlgoDependentVector3D(cons,
						cross);

				return new GeoElement[] { (GeoElement) kernelA.getManager3D()
						.OrthogonalPlane3D(c.getLabel(), (GeoPointND) arg[0],
								algo.getVector3D()) };
			}

			if (!ok[0]) {
				throw argErr(app, c, arg[0]);
			} else if (!ok[1]) {
				throw argErr(app, c, arg[1]);
			} else {
				throw argErr(app, c, arg[2]);
			}

		default:
			throw argNumErr(app, c, n);
		}

	}

}