| 摘要 |
PROBLEM TO BE SOLVED: To provide a forming method for graphic data with a constant shape even in deciding the shape of a figure by the use of random number. SOLUTION: This method is executed in a device forming the graphic data showing the feature of the shape of a three-dimensional figure based on X, Y, Z coordinate values, random number is generated (S104) by using the X, Y coordinate values of a plurality of shape identifying points for identifying the two-dimensional shape of the targeted three-dimensional figure as species of the random number, the Z coordinate value of the shape identifying point is calculated (S105) on the basis of the generated random number, and the graphic data is formed on the basis of the calculated Z coordinate value and the X, Y coordinate values in the shape identifying point (S107).
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