Cannot sample enough valid points. (more)

\[x \cdot \sqrt{y \cdot y - z \cdot z}\]
x \cdot \sqrt{y \cdot y - z \cdot z}
double f(double x, double y, double z) {
        double r828806 = x;
        double r828807 = y;
        double r828808 = r828807 * r828807;
        double r828809 = z;
        double r828810 = r828809 * r828809;
        double r828811 = r828808 - r828810;
        double r828812 = sqrt(r828811);
        double r828813 = r828806 * r828812;
        return r828813;
}