Entertainment apparatus, storage medium, and method of deciding weather

A storage medium that stores a program for deciding weather in a virtual world, wherein said program is read by a computer from said storage medium and executed so as to establish:

• a global weather deciding means for deciding weather at predetermined time intervals in each global area obtained by dividing a map expressing whole of said virtual world into a plurality of global areas, said weather being decided in accordance with a behavior model that sets a condition for the global area in question, and in consideration of area information given in advance to said global area, with said condition being decided from a cyclically-changing event;
• and
• a local weather deciding means for deciding weather at predetermined time intervals in each local area obtained by dividing each global area into a plurality of local areas, said weather being decided in accordance with weather of the global area in question, and in consideration of area information given in advance to the local area in question, with said weather of the global area being decided by said global weather deciding means, on said computer.

A method of deciding weather in a virtual world, comprising steps of:

• deciding global weather at predetermined time intervals in each global area obtained by dividing a map expressing whole of said virtual world into a plurality of global areas, said global weather being decided in accordance with a behavior model that sets a condition for the global area in question and in consideration of the area information given in advance to said global area, with said condition being decided from a cyclically-changing event;
• and
• deciding local weather at predetermined time intervals in each local area obtained by dividing each global area into a plurality of local areas, said local weather being decided in accordance with weather of said global area in question decided by said step of deciding global weather and in consideration of the area information given to said local area.

A program for deciding weather in a virtual world, wherein said program is stored in a storage unit and read by a computer from said storage unit to be execute so as to establish:

• a global weather deciding means for deciding weather at predetermined time intervals in each global area obtained by dividing a map expressing whole of said virtual world into a plurality of global areas, said weather being decided in accordance with a behavior model that sets a condition for the global area in question, and in consideration of area information given in advance to said global area, with said condition being decided from a cyclically-changing event;
• and
• a local weather deciding means for deciding weather at predetermined time intervals in each local area obtained by dividing each global area into a plurality of local areas, said weather being decided in accordance with weather of the global area in question, and in consideration of area information given in advance to the local area in question, with said weather of the global area being decided by said global weather deciding means, on said computer.