Non transitory computer-readable storage medium and method of controlling a computer

A non-transitory computer-readable storage medium storing a program for driving a computer to function as:

• a virtual space generating unit for generating a three-dimensional virtual space;
• a game screen displaying unit for displaying an image as a game screen taken by a virtual camera located in the virtual space;
• an object displaying unit for displaying an object including a polygon in the three-dimensional virtual space, the polygon including first and second vertexes including first and second heights respectively which indicate how high the first and second vertexes are located in the virtual space;
• and
• a fluid displaying unit for displaying pseudo three-dimensional representation of fluid in the virtual space on the game screen;
• wherein the fluid displaying unit includes
• a two-dimensional data acquiring unit for acquiring two-dimensional data including a two-dimensional map by processing at least part of the surface of the three-dimensional object into a two-dimensional manner, and
• a simulating unit for simulating a flow of the fluid based on the first and second heights on the two-dimensional map and displaying a simulating result on the surface of the object.