[请问]如何遍历一条多义线的顶点并将它加到一个resbuf中？

lxspine

[请问]如何遍历一条多义线的顶点并将它加到一个resbuf中？

我想让用户指定一条多义线，并将它作为acedSSGet("F")需要的内容。应该如何把顶点内容加到resbuf中呢？

谢谢！！

BDYCAD

应该和  http://bbs.mjtd.com/forum.php?mod=viewthread&tid=59270

这点里面讲的涵数一样的意思,. 但是我还不会,呵呵,会的朋友请贴个代码参考一下吧

zhang007

sample下关于扩展数据中有关于resbuf指针的详细用法,贴一下罢

 addXdata()
{
    AcDbObject* pObj = selectObject(AcDb::kForRead);
    if (!pObj) {
        acutPrintf("Error selecting object\n");
        return;
    }

   
    // Get the application name and string to be added to
    // xdata.
    //
    char appName[132], resString[200];
    appName[0] = resString[0] = '\0';

    acedGetString(NULL, "Enter application name: ",
        appName);
    acedGetString(NULL, "Enter string to be added: ",
        resString);

   
    struct  resbuf  *pRb, *pTemp;
   
    pRb = pObj->xData(appName);

    if (pRb != NULL) {

        // If xdata is present, then walk to the
        // end of the list.
        //
        for (pTemp = pRb; pTemp->rbnext != NULL;
                pTemp = pTemp->rbnext)
                { ; }
    } else {
        // If xdata is not present, register the application
        // and add appName to the first resbuf in the list.
        // Notice that there is no -3 group as there is in
        // AutoLISP. This is ONLY the xdata so
        // the -3 xdata-start marker isn't needed.
        //
        acdbRegApp(appName);

        pRb = acutNewRb(AcDb::kDxfRegAppName);
        pTemp = pRb;
        pTemp->resval.rstring
            = (char*) malloc(strlen(appName) + 1);
        strcpy(pTemp->resval.rstring, appName);
    }

    // Add user-specified string to the xdata.
    //
    pTemp->rbnext = acutNewRb(AcDb::kDxfXdAsciiString);
    pTemp = pTemp->rbnext;
    pTemp->resval.rstring
        = (char*) malloc(strlen(resString) + 1);
    strcpy(pTemp->resval.rstring, resString);

    // The following code shows the use of upgradeOpen()
    // to change the entity from read to write.
    //
    pObj->upgradeOpen();
    pObj->setXData(pRb);
   
    pObj->close();
    acutRelRb(pRb);
}

当数据个数不确定时,用上面的方法,当数据个数确定时,用acutBuildList更方便

lxspine

谢谢！问题解决了！

liub1979

当数据个数不确定时,用acutBuildList也很方便

 struct resbuf *pointlist;
 ads_point pt;

for(int i=1; i < n; i++){

pt=XXX;

pointlist= acutBuildList(RTRESBUF, pointlist, RTPOINT, pt, 0);

}

zhang007

哦，还能这样用，那用acutBuildList确实方便多了，

hai20110730

liub1979 发表于 2008-4-7 21:03
当数据个数不确定时,用acutBuildList也很方便&nbsp;struct resbuf *pointlist;&nbsp;ads_point pt;for(int  ...

好像会有异常