View Compilation Error

0_0_11692470_21098.cpp: In function `int opposite_side(point3, point3, point3, point3, point3, int, int, int)':
0_0_11692470_21098.cpp:59: error: `eps' undeclared (first use this function)
0_0_11692470_21098.cpp:59: error: (Each undeclared identifier is reported only once for each function it appears in.)