private boolean setQuadric() {
// check end points
if (!((GeoElement) origin).isDefined()
|| origin.isInfinite()
|| !((GeoElement) secondPoint).isDefined()
|| secondPoint.isInfinite()
|| !radius.isDefined()) {
getQuadric().setUndefined();
return false;
}
Coords o = origin.getInhomCoordsInD3();
Coords o2 = secondPoint.getInhomCoordsInD3();
Coords d = o2.sub(o);
if (d.equalsForKernel(0, Kernel.STANDARD_PRECISION)) {
getQuadric().setUndefined();
return false;
}
double r = radius.getDouble();
d.calcNorm();
double altitude = d.getNorm();
quadric.setDefined();
setQuadric(o, o2, d.mul(1 / altitude), r, 0, altitude);
return true;
}
@Override
public void compute() {
// cover undefined cases
if (!degree.isDefined() || !min.isDefined() || !max.isDefined() || degree.getDouble() < 0) {
polynomial.setUndefined();
return;
}
int lower = (int) Math.ceil(min.getDouble());
int upper = (int) Math.floor(max.getDouble());
if (lower > upper || (lower == 0 && upper == 0)) {
polynomial.setUndefined();
return;
}
// input is sane, we can do the computation
int deg = (int) Math.floor(degree.getDouble());
ExpressionNode varExpr = new ExpressionNode(kernel, fv);
ExpressionNode newExpr = randomCoef(deg != 0);
for (int i = 1; i <= deg; i++) {
newExpr = varExpr.power(new MyDouble(kernel, i)).multiply(randomCoef(i != deg)).plus(newExpr);
}
f.setExpression(newExpr, fv);
polynomial.setFunction(f);
}
