| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for surely recognizing the sequential relation of lines even with small change in a length direction, and the depth of an object only with lines without any face described or the sequential relation of the lines. SOLUTION: Three-dimensional data of lines are converted into second- dimensional data. A cross-point at the time of displaying those lines on a second- dimensional display device is detected. When any cross-point is not present, the lines are displayed as they are, and when any cross-points is present, the three-dimensional coordinate of the cross-point of each line is obtained. When it is judged that those cross-points are the point at the same position, they are displayed as they are, and when it is judged that those cross-points are different points, a distance between each point and a view point is calculated. Then, the lines whose cross-point is judged to be positioned far from the view point based on this distance are displayed by eliminating a part whose length is 2δwith the cross-point as a center. Also, when three or more lines cross,δis changed according to the distance (depth information). |
