[Gamer_Z]

pawn Код:

stock ReturnRandomPolygon3(&Float:Point1[2],&Float:Point2[2],&Float:Point[2])
{
    Point1[0] = (random(6000)-3000.0);
    Point1[1] = (random(6000)-3000.0);
    Point2[0] = (random(6000)-3000.0);
    Point2[1] = (random(6000)-3000.0);
    Point3[0] = (random(6000)-3000.0);
    Point3[1] = (random(6000)-3000.0);
}

stock ReturnRandomPolygon3ex(&Float:Point1[2],&Float:Point2[2],&Float:Point3[2])//other function
{
    Point1[0] = (random(6000)-3000.0);
    Point1[1] = (random(6000)-3000.0);
    while(IsPointInPoligon(Point1[0],Point1[1],...yourPolygon...)
    {
        Point1[0] = (random(6000)-3000.0);
        Point1[1] = (random(6000)-3000.0);
    }
    Point2[0] = (random(6000)-3000.0);
    Point2[1] = (random(6000)-3000.0);
    while(IsPointInPoligon(Point2[0],Point2[1],...yourPolygon...)
    {
        Point2[0] = (random(6000)-3000.0);
        Point2[1] = (random(6000)-3000.0);
    }
    Point3[0] = (random(6000)-3000.0);
    Point3[1] = (random(6000)-3000.0);
    while(IsPointInPoligon(Point3[0],Point3[1],...yourPolygon...)
    {
        Point3[0] = (random(6000)-3000.0);
        Point3[1] = (random(6000)-3000.0);
    }
}

example use:
new Float:Points[3][2];
ReturnRandomPolygon3(Points[0],Points[1],Points[2]);

Edit the functions so they meet your requirements..