On an analysis of pass play in a virtual ball game

In the virtual ball game, such as soccer, football, basketball and hockey etc. in a virtual space, "Pass" plays have a significant meaning for players to build up their games. Goodness of a passes course and its velocity is continuously varied, both spatially and temporarily by all motions of ally player avatars and opponent player avatars attending in the game. Because of this, a significant pass between the avatars may not easily be able to be analyzed and generated by the computer systems in real-time. In this paper, we propose a new algorithm that can realize this computation in real-time. Concretely, a real-time detection of a "space" or an "open space" for every avatar by using the idea of "A to Z (Allocated Topographical Zone)" that Kawano et al., have already proposed Based on this idea, we compute the reachable pass vector to any avatar in the game. Moreover, the space where a player can receive a pass given by the pass vector, prior to any other player, is defined as an "exclusively reachable pass zone " for the receiver, and is able to be computed by the algorithm.