/**
* 构造下列形函数中的一个： N1 = L1 = r N2 = L2 = s N3 = L3 = t
*
* @param funID = 1,2,3
*/
public void Create(int funID, double coef) {
funIndex = funID - 1;
if (funID < 1 || 3 < funID) {
throw new FutureyeException("ERROR: funID should be 1,2 or 3.");
}
this.varNames = new String[] {"r", "s", "t"};
innerVarNames = new ObjList<String>("x", "y");
// Compose function: r = r(x,y), s = s(x,y), t = t(x,y)
Map<String, MathFunc> fInners = new HashMap<String, MathFunc>();
final String varName = varNames[funIndex];
fInners.put(
varName,
new AbstractMathFunc(innerVarNames.toList()) {
public MathFunc diff(String var) {
if (area < 0.0) {
throw new FutureyeException("Check nodes order: area < 0.0");
} else {
if (varName.equals("r")) { // r对应三角形高h的负倒数
if (var.equals("x")) return new FC(b[0] / (2 * area));
if (var.equals("y")) return new FC(c[0] / (2 * area));
} else if (varName.equals("s")) { // s对应三角形高h的负倒数
if (var.equals("x")) return new FC(b[1] / (2 * area));
if (var.equals("y")) return new FC(c[1] / (2 * area));
} else if (varName.equals("t")) { // t对应三角形高h的负倒数
if (var.equals("x")) return new FC(b[2] / (2 * area));
if (var.equals("y")) return new FC(c[2] / (2 * area));
}
}
return null;
}
@Override
public double apply(double... args) {
throw new UnsupportedOperationException();
}
});
// 使用复合函数构造形函数
funOuter = new SF123();
this.coef = coef;
funCompose = FC.c(this.coef).M(funOuter.compose(fInners));
funCompose.setActiveVarNames(funOuter.getVarNames());
}
