public GeoElement[] processEquation(Equation equ) throws MyError {
// Application.debug("EQUATION: " + equ);
// Application.debug("NORMALFORM POLYNOMIAL: " + equ.getNormalForm());
try {
equ.initEquation();
// Application.debug("EQUATION: " + equ.getNormalForm());
// check no terms in z
checkNoTermsInZ(equ);
if (equ.isFunctionDependent()) {
return processImplicitPoly(equ);
}
// consider algebraic degree of equation
// check not equation of eg plane
switch (equ.degree()) {
// linear equation -> LINE
case 1:
return processLine(equ, false);
// quadratic equation -> CONIC
case 2:
return processConic(equ);
default:
// test for "y= <rhs>" here as well
if (equ.getLHS().toString().trim().equals("y")) {
Function fun = new Function(equ.getRHS());
// try to use label of equation
fun.setLabel(equ.getLabel());
return processFunction(null, fun);
}
return processImplicitPoly(equ);
}
} catch (MyError eqnError) {
eqnError.printStackTrace();
// invalid equation: maybe a function of form "y = <rhs>"?
String lhsStr = equ.getLHS().toString().trim();
if (lhsStr.equals("y")) {
try {
// try to create function from right hand side
Function fun = new Function(equ.getRHS());
// try to use label of equation
fun.setLabel(equ.getLabel());
return processFunction(null, fun);
} catch (MyError funError) {
funError.printStackTrace();
}
}
// throw invalid equation error if we get here
if (eqnError.getMessage() == "InvalidEquation") throw eqnError;
else {
String[] errors = {"InvalidEquation", eqnError.getLocalizedMessage()};
throw new MyError(app, errors);
}
}
}
