| 摘要 |
PURPOSE:To clarify a characteristic inclination of an interpolated curve with less interpolation frequency, by generating interpolation position data only with a frequency, which is determined by the angle formed at an observation point, to calculate an interpolation value. CONSTITUTION:Observation point data Pj is inputted to an observation point data input block 1 and is stored in a data stack memory area 8a. An interpolation coefficient operating block uses data Pj to operate an interpolation coefficient for every interpolation section of an isoparametric expression curve and stores it in a coefficient stack memory area 8c. An interpolation position data generation frequency operating block 5 operates a cuspidal angle and determines a generation frequency of interpolation position data up to the cusp Pj in the interpolation section by the cuspidal angle and stores this generation frequency in a generation frequency stack memory area 8b. An interpolation position data generator 6 outputs interpolation position data for every interpolation section with this generation frequency. An interpolation value calculating block 3 calculates an interpolation value on a basis of the output from the generator 6 and the interpolation coefficient in the area 8c, and the interpolation value is outputted from an interpolation value output block 4 to a stack memory area 8d. |
