| 摘要 |
The map display apparatus comprises: the view transformation matrix generation unit ( 102 c) which generates the view transformation matrix, including four rows and four columns, for transforming the global coordinate of the three-dimensional object into the view coordinate system; the view transformation matrix change unit ( 102 d) which (i) changes, to 0, (a) the value of the first row in second column and (b) the value of the third row in second column in the view transformation matrix, in the case where the coordinate transformation is executed by multiplying a coordinate with the view transformation matrix from the left side of the coordinate, and (ii) changes, to 0, (a) the value of the second row in first column and (b) the value of the second row in third column in the view transformation matrix, in the case where the coordinate transformation is executed by multiplying the coordinate with the view transformation matrix from the right side of the coordinate; and the view transformation unit ( 102 e) which transforms the global coordinate into the view coordinate system using the changed view transformation matrix.
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