To conduct so-called earth calculation, for example core calculation, more precisely at higher speeds and lower costs than at present by using computers realized now.

A calculation method uses a drawing device which repetitively calculates changes in each parameter in each mesh and has an input matrix composition step for composing input matrices on a CPU, a shader program composition step for composing shader programs on the CPU and an object-oriented program composition step for composing on the CPU object-oriented programs which perform operation codes by sending the input matrices and the shader programs to a VRAM so that the input matrices can be input as textures to the VRAM and the shader program can perform computations of the textures in a GPU and also controls the results of the operation so that they can be returned to the CPU.