package org.geogebra.common.kernel.commands;
import org.geogebra.common.kernel.Kernel;
import org.geogebra.common.kernel.algos.AlgoAngleConic;
import org.geogebra.common.kernel.algos.AlgoAngleNumeric;
import org.geogebra.common.kernel.algos.AlgoAngleVector;
import org.geogebra.common.kernel.arithmetic.Command;
import org.geogebra.common.kernel.geos.GeoConic;
import org.geogebra.common.kernel.geos.GeoElement;
import org.geogebra.common.kernel.geos.GeoLine;
import org.geogebra.common.kernel.geos.GeoNumberValue;
import org.geogebra.common.kernel.geos.GeoNumeric;
import org.geogebra.common.kernel.geos.GeoPoint;
import org.geogebra.common.kernel.geos.GeoPolygon;
import org.geogebra.common.kernel.geos.GeoVec3D;
import org.geogebra.common.kernel.geos.GeoVector;
import org.geogebra.common.kernel.kernelND.GeoConicND;
import org.geogebra.common.kernel.kernelND.GeoLineND;
import org.geogebra.common.kernel.kernelND.GeoPointND;
import org.geogebra.common.kernel.kernelND.GeoVectorND;
import org.geogebra.common.main.MyError;
/**
* Angle[ number ] Angle[ <GeoPolygon> ] Angle[ <GeoConic> ] Angle[
* <GeoVector> ] Angle[ <GeoPoint> ] Angle[ <GeoVector>, <GeoVector> ] Angle[
* <GeoLine>, <GeoLine> ] Angle[ <GeoPoint>, <GeoPoint>, <GeoPoint> ] Angle[
* <GeoPoint>, <GeoPoint>, <Number> ]
*/
public class CmdAngle extends CommandProcessor {
/**
* Create new command processor
*
* @param kernel
* kernel
*/
public CmdAngle(Kernel kernel) {
super(kernel);
}
@Override
public GeoElement[] process(Command c) throws MyError {
int n = c.getArgumentNumber();
boolean[] ok = new boolean[n];
return process(c, n, ok);
}
/**
*
* @param c
* command
* @param n
* arguments length
* @param ok
* ok check
* @return result
* @throws MyError
* argument / length error
*/
protected GeoElement[] process(Command c, int n, boolean ok[])
throws MyError {
GeoElement[] arg;
switch (n) {
/**
* // Anlge[ constant number ] // get number value ExpressionNode en =
* null; ExpressionValue eval; double value = 0.0; // check if we got
* number: // ExpressionNode && NumberValue || Assignment // build
* ExpressionNode from one of these cases ok[0] = false; Object ob =
* c.getArgument(0); if (ob instanceof ExpressionNode) { en =
* (ExpressionNode) ob; eval = en.evaluate(); if (eval .isNumberValue()
* && !(eval .isGeoPolygon())) { value = ((NumberValue)
* eval).getDouble(); ok[0] = true; } } else if (ob instanceof
* Assignment) { GeoElement geo = cons.lookupLabel(((Assignment)
* ob).getVariable()); if (geo .isGeoNumeric()) { // wrap GeoNumeric int
* ExpressionNode for // kernel.DependentNumer() en = new
* ExpressionNode(kernel, (NumberValue) geo,
* ExpressionNode.NO_OPERATION, null); ok[0] = true; } }
*/
case 1:
arg = resArgs(c);
// wrap angle as angle (needed to avoid ambiguities between numbers
// and angles in XML)
if (arg[0].isGeoAngle()) {
// maybe we have to set a label here
if (!cons.isSuppressLabelsActive() && !arg[0].isLabelSet()) {
arg[0].setLabel(c.getLabel());
// make sure that arg[0] is in construction list
if (arg[0].isIndependent()) {
cons.addToConstructionList(arg[0], true);
} else {
cons.addToConstructionList(arg[0].getParentAlgorithm(),
true);
}
}
GeoElement[] ret = { arg[0] };
return ret;
}
// angle from number
else if (arg[0].isGeoNumeric()) {
AlgoAngleNumeric algo = new AlgoAngleNumeric(cons, c.getLabel(),
(GeoNumeric) arg[0]);
GeoElement[] ret = { algo.getAngle() };
return ret;
}
// angle from number
else if (arg[0].isGeoPoint() || arg[0].isGeoVector()) {
return anglePointOrVector(c.getLabel(), arg[0]);
}
// angle of conic or polygon
else {
if (arg[0].isGeoConic()) {
return angle(c.getLabel(), (GeoConicND) arg[0]);
} else if (arg[0].isGeoPolygon()) {
return angle(c.getLabels(), (GeoPolygon) arg[0]);
}
}
throw argErr(app, c, arg[0]);
case 2:
arg = resArgs(c);
GeoElement[] ret = process2(c, arg, ok);
if (ret != null) {
return ret;
}
// syntax error
if (ok[0] && !ok[1]) {
throw argErr(app, c, arg[1]);
}
throw argErr(app, c, arg[0]);
case 3:
arg = resArgs(c);
ret = process3(c, arg, ok);
if (ret != null) {
return ret;
}
// syntax error
throw argErr(app, c, getBadArg(ok, arg));
default:
throw argNumErr(app, c, n);
}
}
/**
* process angle when 2 arguments
*
* @param c
* command
* @param arg
* arguments
* @param ok
* ok array
* @return result (if one)
*/
protected GeoElement[] process2(Command c, GeoElement[] arg, boolean[] ok) {
GeoElement arg0 = arg[0];
GeoElement arg1 = arg[1];
if (arg0.isGeoPoint()) {
arg0 = kernelA.wrapInVector((GeoPointND) arg0);
}
if (arg1.isGeoPoint()) {
arg1 = kernelA.wrapInVector((GeoPointND) arg1);
}
// angle between vectors
if ((ok[0] = (arg0.isGeoVector())) && (ok[1] = (arg1.isGeoVector()))) {
return angle(c.getLabel(), (GeoVectorND) arg0, (GeoVectorND) arg1);
}
// angle between lines
if ((ok[0] = (arg[0].isGeoLine())) && (ok[1] = (arg[1].isGeoLine()))) {
return angle(c.getLabel(), (GeoLineND) arg[0], (GeoLineND) arg[1]);
}
return null;
}
/**
* process angle when 3 arguments
*
* @param c
* command
* @param arg
* arguments
* @param ok
* ok array
* @return result (if one)
*/
protected GeoElement[] process3(Command c, GeoElement[] arg, boolean[] ok) {
// angle between three points
if ((ok[0] = (arg[0].isGeoPoint())) && (ok[1] = (arg[1].isGeoPoint()))
&& (ok[2] = (arg[2].isGeoPoint()))) {
return angle(c.getLabel(), (GeoPointND) arg[0], (GeoPointND) arg[1],
(GeoPointND) arg[2]);
}
// fixed angle
if ((ok[0] = (arg[0].isGeoPoint())) && (ok[1] = (arg[1].isGeoPoint()))
&& (ok[2] = (arg[2] instanceof GeoNumberValue))) {
return angle(c.getLabels(), (GeoPointND) arg[0],
(GeoPointND) arg[1], (GeoNumberValue) arg[2]);
}
return null;
}
/**
* fixed angle
*
* @param labels
* labels
* @param p1
* point to rotate
* @param p2
* center
* @param a
* angle
* @return angle and rotated point
*/
protected GeoElement[] angle(String[] labels, GeoPointND p1, GeoPointND p2,
GeoNumberValue a) {
return getAlgoDispatcher().Angle(labels, (GeoPoint) p1, (GeoPoint) p2,
a, true);
}
/**
* @param label
* label
* @param p1
* first point
* @param p2
* second point
* @param p3
* third point
* @return angle between 3 points
*/
protected GeoElement[] angle(String label, GeoPointND p1, GeoPointND p2,
GeoPointND p3) {
GeoElement[] ret = { getAlgoDispatcher().Angle(label, (GeoPoint) p1,
(GeoPoint) p2, (GeoPoint) p3) };
return ret;
}
/**
* @param label
* label
* @param g
* first line
* @param h
* second line
* @return angle between lines
*/
protected GeoElement[] angle(String label, GeoLineND g, GeoLineND h) {
GeoElement[] ret = {
getAlgoDispatcher().Angle(label, (GeoLine) g, (GeoLine) h) };
return ret;
}
/**
* @param label
* label
* @param v
* first vector
* @param w
* second vector
* @return angle between vectors
*/
protected GeoElement[] angle(String label, GeoVectorND v, GeoVectorND w) {
GeoElement[] ret = { getAlgoDispatcher().Angle(label, (GeoVector) v,
(GeoVector) w) };
return ret;
}
/**
* @param label
* label
* @param v
* vector or point
* @return angle between Ox and vector/point
*/
protected GeoElement[] anglePointOrVector(String label, GeoElement v) {
AlgoAngleVector algo = new AlgoAngleVector(cons, label, (GeoVec3D) v);
GeoElement[] ret = { algo.getAngle() };
return ret;
}
/**
* @param label
* label
* @param c
* conic
* @return angle between Ox and conic first eigen vector
*/
protected GeoElement[] angle(String label, GeoConicND c) {
AlgoAngleConic algo = new AlgoAngleConic(cons, label, (GeoConic) c);
GeoElement[] ret = { algo.getAngle() };
return ret;
}
/**
* @param labels
* label
* @param p
* polygon
* @return angles of the polygon
*/
protected GeoElement[] angle(String[] labels, GeoPolygon p) {
return getAlgoDispatcher().Angles(labels, p);
}
}