| 摘要 |
PURPOSE:To improve graphic technique by applying perspective processing to three dimensional picture information in a program and expressing it as status of picture elements on a picture processing plane. CONSTITUTION:For instance, numberless xk-yk planes are prepared by three dimensional picture information, and a function is set on a plane that passes Z=0 using straight line approximation etc. For searching by a straight line, any point P1 (x1, y1, z1) is set on a space, and a plane perpendicular to a segment OP1 that connects an original point 0 is determined. Length of a segment that becomes a unit is determined on the center of vertical axis by calculating the distance between the point P1 and another point (arbitrary), and displacement in the direction of three axes xm0, ym0, zm0 of this unit displacement is calculated. Basing on this displacement, a picture processing area is set on a picture processing plane, and picture elements are prepared. Then, a proper picture element is selected on the picture processing, and three dimensional picture information function is searched by a straight line that connects the picture element and corresponding picture element on an auxiliary picture processing plane. |
