Cannot sample enough valid points. (more)

\[0 \lt a \land 0 \lt b \land 0 \lt c\]
\[\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}\]
\sqrt{\left(\left(\frac{\left(a + b\right) + c}{2} \cdot \left(\frac{\left(a + b\right) + c}{2} - a\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - b\right)\right) \cdot \left(\frac{\left(a + b\right) + c}{2} - c\right)}
double f(double a, double b, double c) {
        double r8001 = a;
        double r8002 = b;
        double r8003 = r8001 + r8002;
        double r8004 = c;
        double r8005 = r8003 + r8004;
        double r8006 = 2.0;
        double r8007 = r8005 / r8006;
        double r8008 = r8007 - r8001;
        double r8009 = r8007 * r8008;
        double r8010 = r8007 - r8002;
        double r8011 = r8009 * r8010;
        double r8012 = r8007 - r8004;
        double r8013 = r8011 * r8012;
        double r8014 = sqrt(r8013);
        return r8014;
}