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());
}
}
private boolean hasEqualExpressions(GeoFunction f, GeoFunction g) {
boolean equal;
if (f.isGeoFunctionConditional()) {
GeoFunctionConditional geoFun = (GeoFunctionConditional) f;
ExpressionNode en2 = null;
ExpressionNode en = geoFun.getIfFunction().getFunctionExpression();
equal = exp == en;
exp = en;
if (geoFun.getElseFunction() != null) {
en2 = geoFun.getElseFunction().getFunctionExpression();
equal = equal && exp2 == en2;
exp2 = en2;
}
} else {
ExpressionNode en = f.getFunctionExpression();
equal = exp == en;
exp = en;
}
return equal;
}
