Patent ID: 8743123

Claim:
A computer-readable, non-transitory storage medium storing a program for causing a computer to execute a process comprising: generating data of a mask surface with respect to visualization data for calculation values at respective calculation points, wherein the visualization data is arranged in a virtual three-dimensional space; identifying, from a numerical value data storage unit storing, as time-series data, positions of the respective calculation points and calculation values at the respective calculation points, a first point whose position is closest to a predetermined point on the mask surface; reading out, from the numerical value data storage unit, a position of the identified first point in each time; arranging the mask surface in each time based on a direction of a user's sight line and the read position in each time so as to make the mask surface perpendicular to the direction of the user's sight line and have the predetermined point on the mask surface arranged at the read position; and instructing to draw polygon data relating to the visualization data and polygon data relating to the mask surface in time series.