GHL 3.4.5 Release Note

This document describes contents of version up from GHL 3.4.4 to GHL 3.4.5.

• Summary of this version up
• List of added functions
• List of fixed bugs

Summary of this version up

3D: Manifold Solid Topology handling library

A library for handling Manifold Solid Topology, MST, was attached.
This facility is distributed as a part of GHL, though it is implemented as an independent library from GHL.

2D: Alternate versions of offsetting composite curves

Alternate versions of offsetting composite curves were added.

UTIL: Some macros for complex numbers were changed

Some macros for complex numbers have become to call the corredponding functions, in order to get higher precision.

UTIL: The figure of the constant numbers in the finite integral function was changed

The figure of the various constant numbers in the finite integral function was increased, in order to correspond to the recent improvement of micro processors about the precision of floating point calculation.

UTIL: The figure of PI was changed

The figure of PI was increased, in order to correspond to the recent improvement of micro processors about the precision of floating point calculation.

UTIL: Another version of solving algebraic equations

Another version of the function to solve algebraic equations was added.

added functions

2D

gh2ofstCmcCmc2ByBsc2	finds a composite curve which approximates an offset of a composite curve (official, alternate version, type 2)
gh2ofstCmcCmc2ByBsc3	finds a composite curve which approximates an offset of a composite curve (official, alternate version, type 3)
gh2ofstCmcCmc2ByBsc	finds a composite curve which approximates an offset of a composite curve (official, alternate version)
gh2ofstCmcCmc2ByBzc2	finds a composite curve which approximates an offset of a composite curve (official, alternate version, type 2)
gh2ofstCmcCmc2ByBzc3	finds a composite curve which approximates an offset of a composite curve (official, alternate version, type 3)
gh2ofstCmcCmc2ByBzc	finds a composite curve which approximates an offset of a composite curve (official, alternate version)
gh2smlpCCmc2	removes self intersection of closed composite curve (official, alternate version)

3D

UTIL

gh_eqtnHirano	find all roots of an algebraic equation (complex coef. -> complex root)

List of fixed bugs

gh2ofstCmcCmcBy{Bzc,Bsc}

has had some memory leaks.

gh2lengCmc

has returned a wrong value when the length of a section which consists of trimmed curves with negative increasing intervals.

gh2intsLinBsc

has missed a solution which should has been returned at a particular situation.

gh2iflt*Bzc, gh2iflt*Bsc

has missed a solution which should has been returned, or has returned a wrong solution at a particular situation.

gh3convCbsSTri2_Rev2

has happened to kill the process at a particular situation.

gh3intsSrfCbs

has returned a wrong solution with some wide gap between the 3D expression and the 2D expression at the end of the intersection at a particular situation.

gh3intsSrfBzs

has returned a wrong solution with a self-intersection at a particular situation.

gh3ints{Sph,Cyl,Con}Bzs

has returned a wrong solution when the intersection runs along an iso parametric curve on the free form surface.

gh3lengCmc

has returned a wrong value when the length of a section which consists of trimmed curves with negative increasing intervals.

gh3intsSrfBss

has returned a set of scattered intersections if the ratio between the U-dir length and the V-dir length of the Bspline surface was much different between the real 3D space and the 2D parametric space.

gh3intsSrfBzs

has returned an incomplete intersection at a particular situation.

gh3cnvpTrc

has returned a wrong value at a particular situation.

GHL is being brought you by following persons

Naotake KAKISHITA	naokak@pml.co.jp	
Toru HASEGAWA		hasegawa@sra.co.jp
Nobuyuki SHIKANO	shikano@pml.co.jp
Hideaki ITO		hideit@pml.co.jp

Thank you for your continued support!