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int v1y = y2 - y1;
int v2x = px - x1;
int v2y = py - y1;
int numerator = v2x * v1y - v1x * v2y;
long numerator = (long) v2x * v1y - v1x * v2y;
int denominator = v1x * v1x + v1y * v1y;
long denominator = (long) v1x * v1x + v1y * v1y;
int squareDistance = (int) ((long) numerator * numerator / denominator);
long squareDistance = numerator * numerator / denominator;
return squareDistance <= tolerance * tolerance;
}