Hi everyone. I'm running simulation in an area of 1200m*1200m. I use the following code to get the position of the node a and c:
MobileNode *a, *c; a = (MobileNode *)(Node::get_node_by_address(index)); c = (MobileNode *)(Node::get_node_by_address(next)); a->update_position(); xa = a->X(); ya = a->Y(); c->update_position(); xc = c->X(); yc = c->Y(); //Then I calculate the distance between node a and c AC = sqrt((xa-xc)*(xa-xc)+(ya-yc)*(ya-yc)); I think there is no problem with the above codes, but when i print out the position of a,c and the distance AC, they are as follows: ax=212254207 ay=1083267180 cx=-814812632 cy=1083132008 AC=-1073577898 This is obviously not correct, but I do not know where is the problem. Does anyone has any idea on it? Thanks in advance! Cheers, Zilu
