trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, ent);
if (trace.fraction == 1.0)
return false;
mid = bottom = trace.endpos[2];
trace = SV_Move (start, vec3_origin, vec3_origin, stop, MOVE_NOMONSTERS, ent);
if (trace.fraction == 1.0)
return false;
mid = bottom = trace.endpos[2];