| 摘要 |
PURPOSE:To always secure a proper and easy-to-see display of characters by expanding characters on a UV plane including a character start point after converting this start point into a visual point (UVN) coordinate system. CONSTITUTION:A character start position 12 defined by an XYZ coordinate system is converted into the position of a UVN coordinate system in response to an optional visual point 9. Then vector expansion is carried out for characters 13 on a surface parallel to a UV plane through the position 12 converted in terms of view. Thus the characters 13 undergo the expansion of vector on a single plane in the UVN coordinate system where a pattern 11 and the point 12 undergone the conversion of view. Then those characters 13 undergo the conversion of window view boat and are displayed on a display device. Thus a 3-dimensional character receives no conversion of view and therefore the character is never broken in a viewing direction nor turned over. Thus it is possible to always secure a proper and easy-to-see display of characters.
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