几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量  


返回   几何尺寸与公差论坛------致力于产品几何量公差标准GD&T (GDT:ASME)|New GPS(ISO)研究/CAD设计/CAM加工/CMM测量 » 仿射空间:CAX软件开发(三)二次开发与程序设计 » CAD二次开发 » AutoCAD二次开发 » DirectDWG
用户名
密码
注册 帮助 会员 日历 银行 搜索 今日新帖 标记论坛为已读


回复
 
主题工具 搜索本主题 显示模式
旧 2009-05-06, 08:40 PM   #1
yang686526
高级会员
 
注册日期: 06-11
帖子: 14579
精华: 1
现金: 224494 标准币
资产: 234494 标准币
yang686526 向着好的方向发展
默认 【转帖】odgetorusminorradius90

odgetorus::minorradius()
odgetorus::minorradius()
i see that odgetorus::minorradius() returns the radius as a negative number. is there some significance to the radius being negative?
thanks,
lowell
major radius
this is normally positive, but it can be negative (and smaller in magnitude than the minor radius) for the inner portion (i.e., a lemon as opposed to an apple).
minor radius
the absolute value of this value specifies the radius of a cross-sectional circle of the ring. if this is negative, then the torus is a void. if this value is 0, then the torus is undefined
thanks, that helps a lot.
does a negative major axis also indicate a flipped surface normal like a negative minor axis does?
lowell
it set isouternormal() to false.
so would it always be safe to use absolute value of the radii and test isouternormal() to see if the torus is a solid or a void?
thanks,
lowell
our realization of isouternormal is
bool odgetorus::isouternormal() const
{
return minorradius() >= 0.;
}
btw : read documentation about reversenormal(), isnormalreversed() too.
i see no documentation about isnormalreversed() of rerversenormal() in header files or the docjet extraction.
where is the dcumentation i should read?
documentations : try download arx documentation from it is only completion of a form required.
are you telling me that the documentation for dwgdirect is contained in the autodesk arx documentation?
i remember that you told me that the dd representation of a cone was different to the arx representation. is that the only difference between the two?
do you mean that there are enough similarities between the two that i might be able to guess better at the meaning things in dwgdirect?
i will look at the arx documentation.
lowell
autodesk arx documentation can help you in some questions. try to read about acgecone.
i haven't others reported defects relating to gecone.
yes thet are similar in general.
yang686526离线中   回复时引用此帖
GDT自动化论坛(仅游客可见)
回复


主题工具 搜索本主题
搜索本主题:

高级搜索
显示模式

发帖规则
不可以发表新主题
不可以回复主题
不可以上传附件
不可以编辑您的帖子

vB 代码开启
[IMG]代码开启
HTML代码关闭



所有的时间均为北京时间。 现在的时间是 11:50 AM.


于2004年创办,几何尺寸与公差论坛"致力于产品几何量公差标准GD&T | GPS研究/CAD设计/CAM加工/CMM测量"。免责声明:论坛严禁发布色情反动言论及有关违反国家法律法规内容!情节严重者提供其IP,并配合相关部门进行严厉查处,若內容有涉及侵权,请立即联系我们QQ:44671734。注:此论坛须管理员验证方可发帖。
沪ICP备06057009号-2
更多