Three-dimensional image processing system with enhanced character control

Abstract

A video game system includes a game cartridge which is pluggably attached to a main console having a main processor, a coprocessor, expandable main memory and player controllers. A multifunctional peripheral processing subsystem external to the game microprocessor and coprocessor is described which executes commands for handling player controller input/output to thereby lessen the processing burden on the graphics processing subsystem. The video game system and methodology features a unique player controller. A player controlled character may be controlled in a multitude of different ways utilizing the combination of the joystick and/or cross-switch and/or control keys and a wide range of animation effects are generated. The controlled character's pace may be varied between walking by slight controller joystick movement or running through a greater angular displacement of the joystick, while at the same time controlling the direction of the character's movement over 360 degrees in the three-dimensional world. A player controlled character's movement is also controlled as a function of the surface topography on which he stands. For example, a character's moving speed changes depending upon whether the character is standing on a horizontal upwardly or downwardly inclined plane. Speed changes also are controlled as a function of a surface's coefficient of friction, e.g. a surface having little traction, such as -ice or snow, or a surface having more traction, such as grass.