java-programmer >>converting paper space to model space in dxf files

converting paper space to model space in dxf files

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  - Array reference in for loopI have a validate method in a bean class that works and now I want to
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    Here is what I have:
    
    //firstname and lastname are declared earlier
    public boolean validate()
    {
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  - Bug or featureHi, can someone explain the behaviour of that snip
    
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    public static void main(String[] args)
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    try
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    }
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    }
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    try
    {
    Class c = Class.forName("NotbUg");
    }
    catch (ClassNotFoundException e)
    {
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    System.out.println("Still works?");
    
    try
    {
    Class c = Class.forName("bUg");
    }
    catch (ClassNotFoundException e)
    {
    }
    System.out.println("Everything works!!");
    }
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    class BUG
    {
    }
    
    In not works on JDK 1.4.2 but JDK 1.1.4. Bug or feature that question is.
    
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  - class data sharing subjective test resultsHi all,
    
    I made some tests with the new "Class Data Sharing" function
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    The tests were made on an Un*x system (Linux Fedora Core 3).
    
    First of all, the performance gain is very real, especially
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    See you all very soon (and "hi" to the c.l.j.p. regular
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    Jean
    
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    --
    Bush crime family lost/embezzled $3 trillion from Pentagon.
    Complicit Bush-friendly media keeps mum. Rumsfeld confesses on video.
    http://www.infowars.com/articles/us/mckinney_grills_rumsfeld.htm
    
    Canadian Mind Products, Roedy Green.
    See http://mindprod.com/iraq.html photos of Bush's war crimes
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    Doable? How? TIA.

Author

Message

apopescu

Posted: 2006-1-13 0:36:00

Top

java-programmer, converting paper space to model space in dxf files Hello wise guys!

I'm writing a piece of code (java) that shold parse and draw the
content of a DXF file. The trouble is that some blocks (usually texts
or legend) are given in paper space. Can anyone give me a hint how
paper coordinates should be converted to model coordinates? Thanks a
lot!

Adrian

Oliver Wong

Posted: 2006-1-13 4:40:00

Top

java-programmer >> converting paper space to model space in dxf files
<email***@***.com> wrote in message
news:email***@***.com...
> Hello wise guys!
>
> I'm writing a piece of code (java) that shold parse and draw the
> content of a DXF file. The trouble is that some blocks (usually texts
> or legend) are given in paper space. Can anyone give me a hint how
> paper coordinates should be converted to model coordinates? Thanks a
> lot!

Not familiar with DXF, but after some quick googling, and my preconceive
notions of the term "model space" and "paper space", it would seem like
there is no "one size fits all" solution to your problem.

Presumably, model space uses units for describing the scale of the
conceptual model, while paper space uses units for describing the scale of
things on a sheet of paper, when the model is printed out (onto a blueprint,
for example). So, perhaps text will be described as being in size 12 point
font, while an skyscrapper will be described as a couple of hundred meters
tall. Typically, you want to both be able to see the building, and read the
text at the same time.

I seems like the DXF files occasionally define a "view", which aids in
the creating a scale between paper space and model space. If your files
always contain a defined "view", you might want to investigate further in
that direction.

Otherwise, I can think of two basic design decisions. One is to just
prompt the user for what scale (s)he wishes to use. The other is to assume a
scale such that the size of the virtual sheet of paper is the same as the
size of your application's viewport (e.g. if your application is maximized,
then the paper size is approximately the same as the size of the whole
screen).

You would want to find an minimum enclosing rectilinear-rectangle that
encloses all the objects in paper space, and call that the size of the sheet
of paper, then scale it to fit the application viewport.

Do something similar for the model, so that the model is as zoomed in as
much as possible, while still having the whole model visible.

Then use these two sizes to calculate the ratio between model space and
paper space.

- Oliver

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    *@param b The new socketConnected value
    */
    private synchronized void setSocketConnected(boolean b) {
    socketConnected = b;
    }
    
    /**
    * Description of the Method
    *
    *@param tunnel tunnel socket
    *@param host destination host
    *@param port destination port
    *@exception IOException raised when an IO error occurs
    */
    private void doTunnelHandshake(Socket tunnel, String host, int
    port) throws IOException {
    NLUtil.ldebug("SSLTunnelSocketFactory", "doTunnelHandshake",
    "doTunnelHandshake start");
    OutputStream out = tunnel.getOutputStream();
    //generate connection string
    String msg = "CONNECT " + host + ":" + port + " HTTP/1.0\n"
    + "User-Agent: "
    + sun.net.www.protocol.http.HttpURLConnection.userAgent;
    if (!tunnelUserName.equals("") && !tunnelPassword.equals(""))
    {
    NLUtil.ldebug("SSLTunnelSocketFactory", "doTunnelHandshake",
    "Using proxy authencation with username '" + tunnelUserName + "' and
    password '" + tunnelPassword + "'.");
    //add basic authentication header for the proxy
    sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
    String encodedPassword = enc.encode((tunnelUserName + ":"
    + tunnelPassword).getBytes());
    msg = msg + "\nProxy-Authorization: Basic " +
    encodedPassword;
    }
    msg = msg + "\nContent-Length: 0";
    msg = msg + "\nPragma: no-cache";
    
    msg = msg + "\r\n\r\n";
    
    NLUtil.ldebug("SSLTunnelSocketFactory", "doTunnelHandshake", "msg:
    " + msg);
    
    byte b[];
    try {
    //we really do want ASCII7 as the http protocol doesnt
    change with locale
    b = msg.getBytes("ASCII7");
    } catch (UnsupportedEncodingException ignored) {
    //If ASCII7 isn't there, something is seriously wrong!
    b = msg.getBytes();
    }
    out.write(b);
    out.flush();
    
    byte reply[] = new byte[200];
    int replyLen = 0;
    int newlinesSeen = 0;
    boolean headerDone = false;
    
    InputStream in = tunnel.getInputStream();
    boolean error = false;
    
    while (newlinesSeen < 2) {
    int i = in.read();
    if (i < 0) {
    throw new IOException("Unexpected EOF from Proxy");
    }
    if (i == '\n') {
    headerDone = true;
    ++newlinesSeen;
    } else
    if (i != '\r') {
    newlinesSeen = 0;
    if (!headerDone && replyLen < reply.length) {
    reply[replyLen++] = (byte) i;
    }
    }
    }
    
    //convert byte array to string
    String replyStr;
    try {
    replyStr = new String(reply, 0, replyLen, "ASCII7");
    } catch (UnsupportedEncodingException ignored) {
    replyStr = new String(reply, 0, replyLen);
    }
    
    //we check for connection established because our proxy
    returns http/1.1 instead of 1.0
    if (replyStr.toLowerCase().indexOf("200 connection
    established") == -1) {
    NLUtil.ldebug("SSLTunnelSocketFactory", "doTunnelHandshake",
    "replyStr: " + replyStr);
    System.err.println(replyStr);
    throw new IOException("Unable to tunnel through " +
    tunnelHost + ":" + tunnelPort + ". Proxy returns\"" + replyStr +
    "\"");
    }
    //tunneling hanshake was successful
    }
    
    }
- 7
  - X3D and Java3DDoes anyone know if there are debs for X3D and Java3D that will work
    with Sarge? It seems that X3D depends on Java3D. I have the X3D jar
    but would prefer if possible to have a deb. I can't find either for
    Java3D and Sarge, the jars seem to be all for Woody. I know I'll need
    the nVidia drivers for my TNT2 card for this to work, but I think I can
    get those (if I can figure out which of the legacy drivers will work).
    
    I have the Sun 1.5 jre and sdk.
    
    Thanks!
    
    --
    Blessings
    
    Wulfmann
    
    Wulf Credo:
    Respect the elders. Teach the young. Co-operate with the pack.
    Play when you can. Hunt when you must. Rest in between.
    Share your affections. Voice your opinion. Leave your Mark.
    
    --
    To UNSUBSCRIBE, email to email***@***.com
    with a subject of "unsubscribe". Trouble? Contact email***@***.com
- 8
  - Binary distro o' java (freebsdfoundation down)So I was disheartened a few weeks ago to see:
    
    March 11, 2005 - www.FreeBSDFoundation.org temporarily unavailable due to hardware failure.
    Due to a hardware failure, the FreeBSD Foundation web site is temporarily unavailable. The full site will be restored within a few days.
    
    But I was looking forward to the site coming back up and being able to pull down some binary java packages. Alas, no-go yet. Can anyone point me to a recent binary package that will work on 4-STABLE?
    
    -Yanek.
    --
    ___________________________________________________________
    Sign-up for Ads Free at Mail.com
    http://promo.mail.com/adsfreejump.htm
- 9
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- 10
  - URGENT: JDeveloper : Error in Updation through ViewObjectHi
    
    I am getting a very simple but annoying problem. I have made a
    business component project in which I have created a ViewObject named
    "CountryView" using table in SQL Server. Table consists only two
    columns CountryId (which is primary) and CountryName.
    
    Uptill this it is smooth But when I test CountryView using Application
    I am getting error in updating a record. When I change countryName
    [haven't touched countryId] and then try to move on to next record, I
    get error "FOR UPDATE clause cannot be specified with READ ONLY
    CURSOR".
    
    I read some docs on net and get to know that I have to set application
    module's locking mode : optimistic. I did this and I can now move on
    to next record. But when I try to commit data I again get the same
    error i.e. "FOR UPDATE clause cannot be specified with READ ONLY
    CURSOR". I have tried it with two Drivers "Microsoft" and "DataDirect"
    but it has been of no use.
    
    I am using
    RDBMS : SQL SERVER
    SQL Flavor : SQL92
    Made view by selecting table from database
    Connection url :
    jdbc:microsoft:sqlserver://localhost:1433;SelectMethod=cursor;DatabaseName=june07
    
    You may use SelectMethod=direct. This error still comes. Strange thing
    is when I try the same thing on an Oracle Server and with SQL Flavour
    Oracle then it works fine.
    
    I would like to get the answers of following Qs.
    
    1. Why JDeveloper APIs use a "Select FOR UPDATE" query when I have
    called for commit and not just moving on to next record after
    updating. There must be some queries to check if the record has been
    locked by someone else.
    
    2. Am I using a wrong Driver / doing something [incorrect / foolish]
    or it is just a myth that JDeveloper + ADF APIs and SQL server are
    compatible using a third party Driver.
    
    and finally i will be grateful if someone can tell me how to bypass
    this.
    
    Thanks
    Nitin Goyal
- 11
  - Empty cacerts file installed by jdk-1.4.2p5 port causedThis is a multi-part message in MIME format.
    
    ------=_NextPart_000_0039_01C3BE43.75A7BFC0
    Content-Type: text/plain;
    charset="Windows-1252"
    Content-Transfer-Encoding: quoted-printable
    
    Hello,
    
    I was successfully running an SSL-enabled application on the Linux =
    version of JDK 1.4 on FreeBSD 4.8-STABLE, and decided to go native. When =
    I built the native JDK and ran my app on it, I got the following =
    exception when it attempted to open an SSL connection to a host the =
    Linux JDK had never had trouble connecting to:
    
    sun.security.validator.ValidatorException: No trusted certificate found
    
    After some research, I tracked down the problem to the =
    jre/lib/security/cacerts file installed by the jdk-1.4.2p5 port: it was =
    only 32 bytes in size and contained no certificates. I copied the =
    cacerts file from the Linux JDK's directory and that fixed the problem.
    
    Is this a known issue? Or am I the only human being in the world to ever =
    have this problem? I have attached the cacerts file installed by the =
    port.
    
    Please reply to the list only, for my supplied address is fake.
    
    Thanks,
    Nick
    
    ---
    MSN2Go - Web-based MSN Messenger client
    http://www.msn2go.com/
    
    ------=_NextPart_000_0039_01C3BE43.75A7BFC0
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- 12
  - Regex for finding a '?' in a StringIm trying to write a routine to replace the '?' in a String with values
    supplied by the client.
    
    ie
    
    String myString = "Hello there, my first name is ? and my surname is
    ?";
    String myRegex = "<a regex>";
    myString = myString.replaceFirst(myRegex, "David");
    myString = myString.replaceFirst(myRegex, "Bevan");
    System.out.println(mString);
    
    Required output is "Hello there, my first name is David and my surname
    is Bevan"
    
    What do i need as myRegex?
    
    Many thanks
    
    David Bevan
    http://www.davidbevan.co.uk
- 13
  - why allow multiple classes in one file?Hello,
    
    I'm pretty new to Java, so please don't yell at me if my question is
    dumb.
    
    Each public file should be in a separate file. I don't understand why
    is it allowed for a file contain additional non-public (default)
    classes. Why is it not one class per file, public or default?
    
    Thanks,
    Hilbert
- 14
  - Creating Object With Methods During RuntimeHello All,
    
    Is there a way to have a method create and name an object?
    
    If my question is not clear, what I mean is instead of this:
    
    ...
    Person abc = new Person();
    ...
    
    where the programmer specifies the name of the object and where in the
    program it is created, you have a method something like this:
    
    ...
    //the string that is passed to this method is generated by another
    //function which generates random strings - in other words, neither
    //the programmer nor the user are involved in this step directly
    
    private void createObject(String s)
    {
    Person s = new Person();
    }
    ...
    
    This might be used in a GUI simulation that is modeling the interaction
    of different species in an ecosystem, for example. At some point the
    user may wish to increase the complexity of the sim by adding more
    creatures of one type or another. They could press a button which would
    call the createObject function and insert another animal into the fray.
    
    I hope that is enough to sufficiently explain what I am asking, in any case.
    
    By the way, just in case you are wondering, I have not tested the
    example function above (I know it won't work as is). Normally I would
    try myself before asking here, but I don't have access to my PC right
    now and I can't find what I'm looking for on the internet.
    
    Thanks very much to any who can help.
    
    A
- 15
  - hibernate w/derby simple crudhi-
    
    i am really new to hibernate.
    i thought it would be cool to use in my hobby.
    i want to make the code that deals with the db more readable in my projects.
    i hope hibernate can help me in that regard.
    
    i am trying to add a record?
    i get an error that says attempting to modify an identity column.
    i didnt specify the identity column in my constructor call.
    
    i saw how to iterate through the table (read using HQL) but am looking
    for an example of create,update, delete. i am missing the example
    somewhere in my book (hibernate in action).
    
    with delete i probably just set part of a collection to null....right?
    
    if i can get help on this identity column issue, i may be able to figure the
    examples out myself.
    thank you,
    jim
    
    Session session = HibernateUtil.getSessionFactory().openSession();
    Transaction tx = session.beginTransaction();
    Date d1 = new Date(2006-10-14);
    Date d2 = new Date(2006-10-15);
    Accounts accounts = new Accounts("boo",d1,d2);
    
    session.save(accounts);
    tx.commit();
    session.close();
    
    --------------------------------------------------------------------------
    // pojo
    package bcalcpkg;
    // Generated Jan 6, 2007 1:38:27 AM by Hibernate Tools 3.2.0.beta8
    import java.util.Date;
    import javax.persistence.Column;
    import javax.persistence.Entity;
    import javax.persistence.Id;
    import javax.persistence.Table;
    import javax.persistence.Temporal;
    import javax.persistence.TemporalType;
    import javax.persistence.GeneratedValue;
    /**
    * Accounts generated by hbm2java
    */
    @Entity
    @org.hibernate.annotations.Entity(
    dynamicInsert = true, dynamicUpdate = true)
    @Table(name = "ACCOUNTS", schema = "USER1", uniqueConstraints = {})
    public class Accounts implements java.io.Serializable {
    // Fields
    @Id @GeneratedValue
    @Column(name = "ACCOUNTID")
    private int accountid;
    @Column(name = "ACCOUNTNAME")
    private String accountname;
    @Column(name = "ACCOUNTOPEN")
    private Date accountopen;
    @Column(name = "ACCOUNTCLOSE")
    private Date accountclose;
    
    // Constructors
    /** default constructor */
    public Accounts() {
    }
    /** minimal constructor */
    public Accounts(int accountid, String accountname, Date accountopen) {
    this.accountid = accountid;
    this.accountname = accountname;
    this.accountopen = accountopen;
    }
    /** full constructor */
    public Accounts( String accountname, Date accountopen,
    Date accountclose) {
    //this.accountid = accountid;
    this.accountname = accountname;
    this.accountopen = accountopen;
    this.accountclose = accountclose;
    }
    //public Accounts(String text) {
    //this.text = text;
    //}
    
    // Property accessors
    @Id
    @Column(name = "ACCOUNTID", unique = true, nullable = false, insertable =
    true, updatable = true)
    public int getAccountid() {
    return this.accountid;
    }
    public void setAccountid(int accountid) {
    this.accountid = accountid;
    }
    @Column(name = "ACCOUNTNAME", unique = false, nullable = true, insertable =
    true, updatable = true, length = 50)
    public String getAccountname() {
    return this.accountname;
    }
    public void setAccountname(String accountname) {
    this.accountname = accountname;
    }
    @Temporal(TemporalType.DATE)
    @Column(name = "ACCOUNTOPEN", unique = false, nullable = true, insertable =
    true, updatable = true, length = 10)
    public Date getAccountopen() {
    return this.accountopen;
    }
    public void setAccountopen(Date accountopen) {
    this.accountopen = accountopen;
    }
    @Temporal(TemporalType.DATE)
    @Column(name = "ACCOUNTCLOSE", unique = false, nullable = true, insertable
    = true, updatable = true, length = 10)
    public Date getAccountclose() {
    return this.accountclose;
    }
    public void setAccountclose(Date accountclose) {
    this.accountclose = accountclose;
    }
    
    }