Synopsis

PDX_MSGT igeo_GetSurfContinuity(long option, MDA_PTR db_ptr, double *cont_toler, int *u_continuity, int *v_continuity)

Purpose

Get the IGES surface continuity.

Description

Determines the minimum continuity between all the segments in the IGES surface entity to within the cont_toler tolerance. For an IGES surface entity that has only one segment, the type of surface determines the level of continuity. The continuity value can vary from -1 for discontinuous to a maximium of GDX_MAX_DEG where GDX_MAX_DEG is the maximium degree supported for a GDX surface. The IGES surface must be a valid IGES definition.

Input

option

IGEO_GTEST

Test for G continuity for derivatives to 2

db_ptr

The IGES surface entity database pointer.

cont_toler

The continuity tolerance. The distance between the derivatives must be less then or equal this value to have derivative continuity .nf [0] = Model Space Distance (G0) [1] = Radian angular difference (G1) [2] = Curvature difference (G2) [3] = Normalized derivative difference .fi

Output

u_continuity

The level of surface U continuity (-1 to GDX_MAX_DEG).

v_continuity

The level of surface V continuity (-1 to GDX_MAX_DEG).

Tolerances

NORMAL_MAG_TOL

Return

      IGEO_NOERR
      Low level error return
      .fi