protected final void compute() {
// Sum[{x^2,x^3}]
int n = truncate == null ? geoList.size() : (int) truncate.getDouble();
if (n == 0 || n > geoList.size()) {
resultFun.setUndefined();
return;
} else if (n == 1) {
if (!geoList.get(0).isGeoFunctionable()) {
resultFun.setUndefined();
return;
}
GeoFunction fun1 = ((GeoFunctionable) geoList.get(0)).getGeoFunction();
FunctionVariable x1 = fun1.getFunction().getFunctionVariable();
FunctionVariable x = new FunctionVariable(kernel);
ExpressionNode left = fun1.getFunctionExpression().getCopy(fun1.getKernel());
Function f = new Function(left.replace(x1, x), x);
resultFun.setFunction(f);
resultFun.setDefined(true);
return;
}
if (!geoList.get(0).isGeoFunctionable() || !geoList.get(1).isGeoFunctionable()) {
resultFun.setUndefined();
return;
}
// add first two:
resultFun =
GeoFunction.add(
resultFun,
((GeoFunctionable) geoList.get(0)).getGeoFunction(),
((GeoFunctionable) geoList.get(1)).getGeoFunction());
if (n == 2) return;
for (int i = 2; i < n; i++) {
if (!geoList.get(i).isGeoFunctionable()) {
resultFun.setUndefined();
return;
}
resultFun =
GeoFunction.add(
resultFun, resultFun, ((GeoFunctionable) geoList.get(i)).getGeoFunction());
}
}
