Mobile ad hoc network (MANET) is a subset of computer wireless networks and in its simplest form is the collection of mobile stations connected with each other by radio links to form a network. MANET is a self-configured, self-organized network where the movement of the mobile stations is random during the network. The positions of the nodes are unpredictable and have direct impact over network efficiency and its performance. For MANET network monitoring, we need to trace the motion of the node and for controlling, we need to decide the optimal node movement. The focus for this paper is the study of three-way solutions of modeling node movement in MANET such as movement via trajectories, facilities for random mobility and movement via programming interface. This study is followed by routing protocols performance analysis. Three routing protocols DSR, AODV and OLSR are compared with segment-based trajectory as node movement model. OPNET is the simulation tool use and the performances of the three routing protocols are analyzed based on the network metrics: throughput, end-to-end delay and network load. The comparison analysis will be carried out and at last, the conclusion will be presented.