Game system, judgement table producting method, and computer-readable storage medium carrying game program

A judgment table producing method for a game system which reads out data of imaginary game field constituted by a plurality of areas to be displayed in scenes of game to produce images to be displayed and controls action of character located in the areas of the imaginary game field based on produced judgment table when the data of the imaginary game field is read out, the method comprising the steps of:

• selecting one of the areas of the imaginary game field in which the character can be located as a judgment start zone, and selecting one of a plurality of coordinate points within the judgment start zone as a judgment start point;
• selecting one of the areas of the imaginary game field, which is other than the one selected as the judgment start zone and in which the character can be located, as an evaluation zone, and selecting a predetermined number of coordinate points within the evaluation zone as evaluation points;
• judging, for the respective evaluation points, whether or not any obstacle exists on a straight line from the judgment start point to the evaluation point;
• recording the evaluation points, for which the judgment result indicates that obstacle exists on the straight line, as a point which is out of an imaginary visual field of the character located at the judgment start point, and recording the evaluation points, for which the judgment result indicates that obstacle does not exist on the straight line, as a point which is within the imaginary visual field of the character located at the judgment start point;
• selecting, in turn, all of the areas of the imaginary game field, which are other than the judgment start zone and in which the character can be located, as the evaluation zone, and selecting, in turn, all of the areas of the imaginary game field in which the character can be located as the judgment start zone;
• and
• producing judgment tables based on results of the recording by the recording step after all of the areas of the imaginary game field are selected as the judgment start zone.