Cannot sample enough valid points. (more)

$\left(-\left(\left(az - dz\right) - \frac{vz}{vx} \cdot \left(ax - dx\right)\right)\right) - \left(\left(bz - az\right) - \frac{vz}{vx} \cdot \left(bx - ax\right)\right) \cdot f$
\left(-\left(\left(az - dz\right) - \frac{vz}{vx} \cdot \left(ax - dx\right)\right)\right) - \left(\left(bz - az\right) - \frac{vz}{vx} \cdot \left(bx - ax\right)\right) \cdot f
double f(double az, double dz, double vz, double vx, double ax, double dx, double bz, double bx, double f) {
double r2396939 = az;
double r2396940 = dz;
double r2396941 = r2396939 - r2396940;
double r2396942 = vz;
double r2396943 = vx;
double r2396944 = r2396942 / r2396943;
double r2396945 = ax;
double r2396946 = dx;
double r2396947 = r2396945 - r2396946;
double r2396948 = r2396944 * r2396947;
double r2396949 = r2396941 - r2396948;
double r2396950 = -r2396949;
double r2396951 = bz;
double r2396952 = r2396951 - r2396939;
double r2396953 = bx;
double r2396954 = r2396953 - r2396945;
double r2396955 = r2396944 * r2396954;
double r2396956 = r2396952 - r2396955;
double r2396957 = f;
double r2396958 = r2396956 * r2396957;
double r2396959 = r2396950 - r2396958;
return r2396959;
}