IsNPCInRangeOfPoint(npcid, Float: range, Float: x, Float: y, Float: z)
{
new pos[3];
GetNPCPos(npcid, pos[0], pos[1], pos[2]); // change this function name accordingly or just use GetPlayerPos
return (VectorSize(x, y, z, pos[0], pos[1], pos[2]) <= range);
}