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  • The Unspoken - The Why of GC Ergonomics

    - by jonthecollector
    Do you use GC ergonomics, -XX:+UseAdaptiveSizePolicy, with the UseParallelGC collector? The jist of GC ergonomics for that collector is that it tries to grow or shrink the heap to meet a specified goal. The goals that you can choose are maximum pause time and/or throughput. Don't get too excited there. I'm speaking about UseParallelGC (the throughput collector) so there are definite limits to what pause goals can be achieved. When you say out loud "I don't care about pause times, give me the best throughput I can get" and then say to yourself "Well, maybe 10 seconds really is too long", then think about a pause time goal. By default there is no pause time goal and the throughput goal is high (98% of the time doing application work and 2% of the time doing GC work). You can get more details on this in my very first blog. GC ergonomics The UseG1GC has its own version of GC ergonomics, but I'll be talking only about the UseParallelGC version. If you use this option and wanted to know what it (GC ergonomics) was thinking, try -XX:AdaptiveSizePolicyOutputInterval=1 This will print out information every i-th GC (above i is 1) about what the GC ergonomics to trying to do. For example, UseAdaptiveSizePolicy actions to meet *** throughput goal *** GC overhead (%) Young generation: 16.10 (attempted to grow) Tenured generation: 4.67 (attempted to grow) Tenuring threshold: (attempted to decrease to balance GC costs) = 1 GC ergonomics tries to meet (in order) Pause time goal Throughput goal Minimum footprint The first line says that it's trying to meet the throughput goal. UseAdaptiveSizePolicy actions to meet *** throughput goal *** This run has the default pause time goal (i.e., no pause time goal) so it is trying to reach a 98% throughput. The lines Young generation: 16.10 (attempted to grow) Tenured generation: 4.67 (attempted to grow) say that we're currently spending about 16% of the time doing young GC's and about 5% of the time doing full GC's. These percentages are a decaying, weighted average (earlier contributions to the average are given less weight). The source code is available as part of the OpenJDK so you can take a look at it if you want the exact definition. GC ergonomics is trying to increase the throughput by growing the heap (so says the "attempted to grow"). The last line Tenuring threshold: (attempted to decrease to balance GC costs) = 1 says that the ergonomics is trying to balance the GC times between young GC's and full GC's by decreasing the tenuring threshold. During a young collection the younger objects are copied to the survivor spaces while the older objects are copied to the tenured generation. Younger and older are defined by the tenuring threshold. If the tenuring threshold hold is 4, an object that has survived fewer than 4 young collections (and has remained in the young generation by being copied to the part of the young generation called a survivor space) it is younger and copied again to a survivor space. If it has survived 4 or more young collections, it is older and gets copied to the tenured generation. A lower tenuring threshold moves objects more eagerly to the tenured generation and, conversely a higher tenuring threshold keeps copying objects between survivor spaces longer. The tenuring threshold varies dynamically with the UseParallelGC collector. That is different than our other collectors which have a static tenuring threshold. GC ergonomics tries to balance the amount of work done by the young GC's and the full GC's by varying the tenuring threshold. Want more work done in the young GC's? Keep objects longer in the survivor spaces by increasing the tenuring threshold. This is an example of the output when GC ergonomics is trying to achieve a pause time goal UseAdaptiveSizePolicy actions to meet *** pause time goal *** GC overhead (%) Young generation: 20.74 (no change) Tenured generation: 31.70 (attempted to shrink) The pause goal was set at 50 millisecs and the last GC was 0.415: [Full GC (Ergonomics) [PSYoungGen: 2048K-0K(26624K)] [ParOldGen: 26095K-9711K(28992K)] 28143K-9711K(55616K), [Metaspace: 1719K-1719K(2473K/6528K)], 0.0758940 secs] [Times: user=0.28 sys=0.00, real=0.08 secs] The full collection took about 76 millisecs so GC ergonomics wants to shrink the tenured generation to reduce that pause time. The previous young GC was 0.346: [GC (Allocation Failure) [PSYoungGen: 26624K-2048K(26624K)] 40547K-22223K(56768K), 0.0136501 secs] [Times: user=0.06 sys=0.00, real=0.02 secs] so the pause time there was about 14 millisecs so no changes are needed. If trying to meet a pause time goal, the generations are typically shrunk. With a pause time goal in play, watch the GC overhead numbers and you will usually see the cost of setting a pause time goal (i.e., throughput goes down). If the pause goal is too low, you won't achieve your pause time goal and you will spend all your time doing GC. GC ergonomics is meant to be simple because it is meant to be used by anyone. It was not meant to be mysterious and so this output was added. If you don't like what GC ergonomics is doing, you can turn it off with -XX:-UseAdaptiveSizePolicy, but be pre-warned that you have to manage the size of the generations explicitly. If UseAdaptiveSizePolicy is turned off, the heap does not grow. The size of the heap (and the generations) at the start of execution is always the size of the heap. I don't like that and tried to fix it once (with some help from an OpenJDK contributor) but it unfortunately never made it out the door. I still have hope though. Just a side note. With the default throughput goal of 98% the heap often grows to it's maximum value and stays there. Definitely reduce the throughput goal if footprint is important. Start with -XX:GCTimeRatio=4 for a more modest throughput goal (%20 of the time spent in GC). A higher value means a smaller amount of time in GC (as the throughput goal).

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  • Benefits and features of different requirements-management systems and tools available?

    - by Gnark
    I am looking for a good comparision of different available professionial requirement managment tools. I am especially interested in the the features available within the different software solutions. Additionally to the "obvious" features I am looking for a proffesional Requirement Management System that supports for: multi-lingual customizable generation of documentation & history (graphs) search features (e.g. fulltext for comments), ordering, priorities version history bi-directional traceability of changes, artefacts, requirements, changes in requirements, etc. Any kind of integration of V-Model XT would be a really-nice-to-have-feature... Besides, I'd like to hear any personal motivated recommendations and/or experiences with different requirement management systems. Any input is highly appreciated. content consulted : similar question reqm tool with v-model nice, but too old paper (pdf) Tools Journal

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  • Benefits and features of different requirements-management systems and tools available?

    - by DevDevDave
    I am looking for a good comparision of different available professional requirement management tools. I am especially interested in the the features available within the different software solutions. Additionally to the "obvious" features I am looking for a proffesional Requirement Management System that supports for: multi-lingual customizable generation of documentation & history (graphs) search features (e.g. fulltext for comments), ordering, priorities version history bi-directional traceability of changes, artefacts, requirements, changes in requirements, etc. Any kind of integration of V-Model XT would be a really-nice-to-have-feature. Besides, I'd like to hear any personal motivated recommendations and/or experiences with different requirement management systems. Any input is highly appreciated. Content consulted: similar question reqm tool with v-model ToolsJournal.com nice, but too old paper (pdf)

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  • Are UML class diagrams adequated to design javascript systems?

    - by Vandell
    Given that UML is oriented towards a more classic approach to object orientation, is it still usable in a reliable way to design javascript systems? One specific problem that I can see is that class diagrams are, in fact, a structural view of the system, and javascript is more behaviour driven, how can you deal with it? Please, keep in mind that I'm not talking abot the real world domain here, It's a model for the solution that I'm trying to achieve.

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  • Why are source control systems still mostly backed with files?

    - by Andy
    It seems that more source control systems still use files as the means of storing the version data. Vault and TFS use Sql Server as their data store, which I would think would be better for data consistency as well as speed. So why is it that SVN, I believe GIT, CVS, etc still use the file system as essentially a database, (I ask this question as we had our SVN server just corrupt itself during a normal commit) instead of using actual database software (MSSQL, Oracle, Postgre, etc)?

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  • Microsoft Office : la RTM du SDK Open XML 2.0 introduit un outil idéal pour la génération de documen

    Mise à jour du 24/03/10 Le SDK Open XML 2.0 pour Microsoft Office disponible en version RTM Introduit un outil idéal pour la génération de documents coté serveur La version RTM du SDK Open XML 2.0 pour Microsoft Office est maintenant disponible en téléchargement. [IMG]http://badger.developpez.com/tutoriels/dotnet/creer-fichier-word-openxml/images/logo.png[/IMG] Le SDK apporte une API vous permettant de manipuler de façon typée (et via LINQ !) les documents au format Open XML. Vous pourrez ainsi facilement créer et manipuler des documents office sans aucun logiciel Microsoft Office installé. C'est le choix idéal ...

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  • What forms of non-interactive RPG battle systems exist?

    - by Landstander
    I am interested in systems that allow players to develop a battle plan or setup strategy for the party or characters prior to entering battle. During the battle the player either cannot input commands or can choose not to. Rule Based In this system the player can setup a list of rules in the form of [Condition - Action] that are then ordered by priority. Gambits in Final Fantasy XII Tactics in Dragon Age Origin & II

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  • Are UML class diagrams adequate to design javascript systems?

    - by Vandell
    Given that UML is oriented towards a more classic approach to object orientation, is it still usable in a reliable way to design javascript systems? One specific problem that I can see is that class diagrams are, in fact, a structural view of the system, and javascript is more behaviour driven, how can you deal with it? Please, keep in mind that I'm not talking abot the real world domain here, It's a model for the solution that I'm trying to achieve.

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  • What is lightweight lock in distributed shared memory systems?

    - by Kutluhan Metin
    I started reading Tanenbaum's Distributed Systems book a while ago. I read about two phase locking and timestamp reordering in transactions chapter. While having a deeper look from google I heard of lightweight transactions/lightweight transactional memory. But I couldn't find any good explanation and implementation. So what is lightweight memory? What are the benefits of lightweight locks? And how can I implement them?

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  • How can I make a program (using SDL) built on Ubuntu work on other systems?

    - by halifar
    Hi there, I'm writing a program that uses OpenAL. When I link against it (I'm using CMake), it also links against libpulse - PulseAudio. This results in the binary not working on other systems. Can I somehow not link against PulseAudio and still use OpenAL on Ubuntu? Edit: I just figured something out: It's not OpenAL that's dragging PulseAudio in, it's SDL. Is there anything I can do about that?

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  • Why are Linux-based operating systems considered safer than Windows?

    - by echoblaze
    I hear that Linux-based systems are better for security. Apparently they don't have viruses and do not need antivirus software. Even my university claims this - they refuse to have Windows on their servers, which is a real shame because we wanted to use the .NET framework to create some websites. The only reason I can see Linux being safer is because it's open-source, so bugs theoretically would get caught and fixed sooner. I know a bit about how operating systems work, but haven't really delved into how Linux and Windows implement their OS. Can someone explain the difference that makes Linux-based systems more secure?

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  • Creating a directory and parents directory in unix

    - by eveo
    I can't believe such a simple homework question is messing with me: Enter the Linux command to create both a parent directory called 'systems' and it's child directory called 'part3' at the same time. Assume that directory 'systems' will branch-off your home directory and that you are in your home directory to start. Use a relative pathname. You entered: mkdir -p ~/part3/systems/ Please try again. Hint: Use mkdir with the appropriate option Tried: mkdir -p ~/systems/part3/ mkdir -p ~systems/part3 mkdir -p ~/systems/part3 mkdir -p ~/systems/part3 mkdir ~/systems/part3/ mkdir ~systems/part3 mkdir ~/systems/part3 mkdir ~/systems/part3

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  • How to use wkhtmltopdf.exe in ASP.net

    - by David Murdoch
    After 10 hours and trying 4 other HTML to PDF tools I'm about ready to explode. wkhtmltopdf sounds like an excellent solution...the problem is that I can't execute a process with enough permissions from asp.net so... Process.Start("wkhtmltopdf.exe","http://www.google.com google.pdf"); starts but doesn't do anything. Is there an easy way to either: -a) allow asp.net to start processes (that can actually do something) or -b) compile/wrap/whatever wkhtmltopdf.exe into somthing I can use from C# like this: WkHtmlToPdf.Save("http://www.google.com", "google.pdf");

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  • How do I generate C# code from WADL files?

    - by Anders Sandvig
    I am looking for a code generator than can generate C# code to access RESTful web services described by WADL files in a way similar to how wadl2java works. Doing som searching I came across the rest-api-code-gen project on Google Code, but although the latest source does in fact support C#, the REST Describe & Compile demo site does not. (The C# button is there, but it's disabled.) I realize I could download the source and set up my own server with the latest version, but I would prefer not to, as what I need is a command line tool and not a web application with dependencies to Google Web Toolkit. I guess I could write my own a command line tool based on the same source code, but if it has already been done, or other tools can do the job, I'd rather avoid it. So, I'm wondering, are there any tools like that out there?

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  • Image auto resizes in PdfPCell with iTextSharp

    - by Mladen Prajdic
    Hi, i'm having a weird problem with images in iTextSharp library. I'm adding the image to the PdfPCell and for some reason it gets scaled up. How do i keep it to original size? Here's the image of the PDF at 100% and the image in its original size opened in paint.net. I though that the images would be same when printed but the difference on the pic is the same on the printed version. Having to manually scale the image with ScaleXXX to get it to right seems a bit illogical and does not give a good result. So how do I put the image in its original size inside a PdfPCell of a table without having to scale it? Here's my code: private PdfPTable CreateTestPDF() { PdfPTable table = new PdfPTable(1); table.WidthPercentage = 100; Phrase phrase = new Phrase("MY TITLE", _font24Bold); table.AddCell(phrase); PdfPTable nestedTable = new PdfPTable(5); table.WidthPercentage = 100; Phrase cellText = new Phrase("cell 1", _font9BoldBlack); nestedTable.AddCell(cellText); cellText = new Phrase("cell 2", _font9BoldBlack); nestedTable.AddCell(cellText); cellText = new Phrase("cell 3", _font9BoldBlack); nestedTable.AddCell(cellText); iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(@"d:\MyPic.jpg"); image.Alignment = iTextSharp.text.Image.ALIGN_CENTER; PdfPCell cell = new PdfPCell(image); cell.HorizontalAlignment = PdfPCell.ALIGN_MIDDLE; nestedTable.AddCell(cell); cellText = new Phrase("cell 5", _font9BoldBlack); nestedTable.AddCell(cellText); nestedTable.AddCell(""); string articleInfo = "Test Text"; cellText = new Phrase(articleInfo, _font8Black); nestedTable.AddCell(cellText); nestedTable.AddCell(""); nestedTable.AddCell(""); nestedTable.AddCell(""); table.AddCell(nestedTable); SetBorderSizeForAllCells(table, iTextSharp.text.Rectangle.NO_BORDER); return table; } static BaseColor _textColor = new BaseColor(154, 154, 154); iTextSharp.text.Font _font8 = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 8, iTextSharp.text.Font.NORMAL, _textColor); iTextSharp.text.Font _font8Black = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 8, iTextSharp.text.Font.NORMAL, BaseColor.BLACK); iTextSharp.text.Font _font9 = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 9, iTextSharp.text.Font.NORMAL, _textColor); iTextSharp.text.Font _font9BoldBlack = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 9, iTextSharp.text.Font.BOLD, BaseColor.BLACK); iTextSharp.text.Font _font10 = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 10, iTextSharp.text.Font.NORMAL, _textColor); iTextSharp.text.Font _font10Black = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 10, iTextSharp.text.Font.NORMAL, BaseColor.BLACK); iTextSharp.text.Font _font10BoldBlack = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 10, iTextSharp.text.Font.BOLD, BaseColor.BLACK); iTextSharp.text.Font _font24Bold = new iTextSharp.text.Font(iTextSharp.text.Font.FontFamily.HELVETICA, 24, iTextSharp.text.Font.BOLD, _textColor);

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  • Hexagonal Grid Coordinates To Pixel Coordinates

    - by CaptnCraig
    I am working with a hexagonal grid. I have chosen to use this coordinate system because it is quite elegant. This question talks about generating the coordinates themselves, and is quite useful. My issue now is in converting these coordinates to and from actual pixel coordinates. I am looking for a simple way to find the center of a hexagon with coordinates x,y,z. Assume (0,0) in pixel coordinates is at (0,0,0) in hex coords, and that each hexagon has an edge of length s. It seems to me like x,y, and z should each move my coordinate a certain distance along an axis, but they are interrelated in an odd way I can't quite wrap my head around it. Bonus points if you can go the other direction and convert any (x,y) point in pixel coordinates to the hex that point belongs in.

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  • Show PDF in iPad using CGPDF APIs

    - by AJ
    I have learned Apple has release CGPDF APIs in SDK 3.2 for drawing PDF context. What I understand from these APIs is that you can draw a PDF to a data object or a PDF file. You can then export it, may be, to your sandbox's directory OR add as an attachment in the mail. But I am not sure if we can use these APIs to read a PDF from application bundle and show it to the user page-by-page on the screen. What I want to do is open a PDF of a magazine in a magazine reader app. I was also wondering if we can identify the links in a PDF file and open them in the app. Let me know if have done OR doing anything like this. Thanks AJ

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  • PHP PDF library with unicode support. anybody??

    - by soden
    I tried dompdf. Its a lot easier than the other libraries but it doesnt have unicode support. Well it has unicode support but requires another library calld PDFLib ($1k version). so just wondering if anybodies ever stumbled upon or used any PHP pdf library which is easy to use and has unicode support. thanks,

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  • Trouble with ITextSharp - Converting XML to PDF

    - by AllenG
    Okay... I'm trying to use the most recent version of ITextSharp to turn an XML file into a PDF. It isn't working. The documentation on SourceForge doesn't seem to have kept up with the actual releases; the code in the provided example won't even compile under the newest version. Here is my test XML: <Remittance> <RemitHeader> <Payer>BlueCross</Payer> <Provider>Maricopa</Provider> <CheckDate>20100329</CheckDate> <CheckNumber>123456789</CheckNumber> </RemitHeader> <RemitDetail> <NPI>NPI_GOES_HERE</NPI> <Patient>Patient Name</Patient> <PCN>0034567</PCN> <DateOfService>20100315</DateOfService> <TotalCharge>125.57</TotalCharge> <TotalPaid>55.75</TotalPaid> <PatientShare>35</PatientShare> </RemitDetail> </Remittance> And here is the code I'm attempting to use to turn that into a PDF. Document doc = new Document(PageSize.LETTER, 36, 36, 36, 36); iTextSharp.text.pdf.PdfWriter.GetInstance(doc, new StreamWriter(fileOutputPath).BaseStream); doc.Open(); SimpleXMLParser.Parse((ISimpleXMLDocHandler)doc, new StreamReader(fileInputPath).BaseStream); doc.Close(); Now, I was pretty sure the (ISimpleXMLDocHandler)doc piece wasn't going to work, but I can't actually find anything in the source that both a) implements ISimleXMLDocHandler and b) will accept a standard XML document and parse it to PDF. FYI- I did try an older version which would compile using the example code from sourceforge, but it wasn't working either.

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  • failed to find PDF header: '%PDF' not found in xCode

    - by Alexander
    I'm trying to create a PDF Object from binary XString in xCode. (OData from SAP, utf-8) Here is the coding: const char* buf = [temp1 UTF8String]; pdffile = [NSData dataWithBytes:buf length:length1]; [webDisplay loadData:self.pdffile MIMEType:@"application/pdf" textEncodingName:@"utf-8" baseURL:nil]; self.webDisplay.scalesPageToFit = YES; temp1 is a XString length1 is the length of PDF file in bytes. I get following error message: failed to find PDF header: '%PDF' not found Some ideas? Thanks!

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  • Loop through values and display in a pdf file

    - by chupinette
    Hello all! i have written the following code: As you can see there is a for loop to go through some values and display them in the generated pdf. The problem is that all the values are being written at the same place. I have tried to insert a new line but it does not seem to work. Can anyone suggest me how i can do it? Do i need to write a nested for loop so that it the values at different y positions? $pdf = pdf_new(); // open a file pdf_open_file($pdf, "C:/xampp/htdocs/final/6.pdf"); pdf_set_info($pdf, "Author", ""); pdf_set_info($pdf, "Title", ""); pdf_set_info($pdf, "Creator", ""); pdf_set_info($pdf, "Subject", ""); // start a new page (A4) $x = 595; $y = 842; pdf_begin_page($pdf, $x, $y); pdf_set_parameter($pdf, 'FontOutline', 'Arial=c:\windows\fonts\arial.ttf'); pdf_setcolor($pdf, "stroke", "rgb", 0, 0, 0, 1.0); // get and use a font object $font = pdf_findfont($pdf, "Arial", "host", 1); pdf_setfont($pdf, $font, 10); // print text pdf_show_xy($pdf, "QUOTATION" , 250, $y - 60); pdf_show_xy($pdf, "Customer Name: " . $this->customer_details['first_name'] . " " . $this->customer_details['last_name'], 50, 770); pdf_show_xy($pdf, "Date: " . date("F j, Y, g:i a"), 50, 750); pdf_show_xy($pdf, "Number of items requested: " . $count_items_req, 50, 730); pdf_show_xy($pdf, "Number of items found: " . $count_items_found, 50, 710); // add an image under the text $image = $image = PDF_load_image($pdf, "png", "C:/xampp/htdocs/final/images/footer_logo.png", ""); PDF_fit_image($pdf, $image, 50, 785, ""); pdf_moveto($pdf, 20, 780); pdf_lineto($pdf, 575, 780); pdf_stroke($pdf); // draw another line near the bottom of the page pdf_moveto($pdf, 20, 50); pdf_lineto($pdf, 575, 50); pdf_stroke($pdf); //Draw the lines $offset = 184; $i = 0; pdf_moveto($pdf, 20, $y - 160); pdf_lineto($pdf, $x - 20, $y - 160); pdf_stroke($pdf); pdf_moveto($pdf, $x - 400, $y - 160); pdf_lineto($pdf, $x - 400, 80); pdf_stroke($pdf); pdf_moveto($pdf, $x - 200, $y - 160); pdf_lineto($pdf, $x - 200, 80); pdf_stroke($pdf); pdf_moveto($pdf, $x - 100, $y - 160); pdf_lineto($pdf, $x - 100, 80); pdf_stroke($pdf); pdf_continue_text($pdf, ''); pdf_continue_text($pdf, ''); pdf_show_xy($pdf, "Searched Item", 70, $y - 150); pdf_show_xy($pdf, "Searched Item", 70, $y - 150); pdf_show_xy($pdf, "Item name", 240, $y - 150); pdf_show_xy($pdf, "Item name", 240, $y - 150); pdf_show_xy($pdf, "Price", $x - 180, $y - 150); pdf_show_xy($pdf, "Price", $x - 180, $y - 150); pdf_show_xy($pdf, "Discounted Price", $x - 100, $y - 150); pdf_show_xy($pdf, "Discounted Price", $x - 100, $y - 150); for ($i = 0; $i < count($this->quotation_details); $i++) { pdf_show_xy($pdf, $this->quotation_details[$i]['name_searched'] , 70, $y - 500); } // and write some text under it pdf_show_xy($pdf, "", 250, 35); // end page pdf_end_page($pdf); // close and save file pdf_close($pdf);

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  • Android-Java: Constructing a triangle based on Coordinates on a map and your bearing

    - by Aidan
    Hi Guys, I'm constructing a geolocation based application and I'm trying to figure out a way to make my application realise when a user is facing the direction of the given location (a particular long / lat co-ord). I've got the math figured, I just have the triangle to construct. //UPDATE So I've figured out a good bit of this... Below is a method which takes in a long / lat value and attempts to compute a triangle finding a point 700 meters away and one to its left + right. It'd then use these to construct the triangle. It computes the correct longitude but the latitude ends up somewhere off the coast of east Africa. (I'm in Ireland!). public void drawtri(double currlng,double currlat, double bearing){ bearing = (bearing < 0 ? -bearing : bearing); System.out.println("RUNNING THE DRAW TRIANGLE METHOD!!!!!"); System.out.println("CURRENT LNG" + currlng); System.out.println("CURRENT LAT" + currlat); System.out.println("CURRENT BEARING" + bearing); //Find point X(x,y) double distance = 0.7; //700 meters. double R = 6371.0; //The radius of the earth. //Finding X's y value. Math.toRadians(currlng); Math.toRadians(currlat); Math.toRadians(bearing); distance = distance/R; Global.Alat = Math.asin(Math.sin(currlat)*Math.cos(distance)+ Math.cos(currlat)*Math.sin(distance)*Math.cos(bearing)); System.out.println("CURRENT ALAT!!: " + Global.Alat); //Finding X's x value. Global.Alng = currlng + Math.atan2(Math.sin(bearing)*Math.sin(distance) *Math.cos(currlat), Math.cos(distance)-Math.sin(currlat)*Math.sin(Global.Alat)); Math.toDegrees(Global.Alat); Math.toDegrees(Global.Alng); //Co-ord of Point B(x,y) // Note: Lng = X axis, Lat = Y axis. Global.Blat = Global.Alat+ 00.007931; Global.Blng = Global.Alng; //Co-ord of Point C(x,y) Global.Clat = Global.Alat - 00.007931; Global.Clng = Global.Alng; } From debugging I've determined the problem lies with the computation of the latitude done here.. Global.Alat = Math.asin(Math.sin(currlat)*Math.cos(distance)+ Math.cos(currlat)*Math.sin(distance)*Math.cos(bearing)); I have no idea why though and don't know how to fix it. I got the formula from this site.. http://www.movable-type.co.uk/scripts/latlong.html It appears correct and I've tested multiple things... I've tried converting to Radians then post computations back to degrees, etc. etc. Anyone got any ideas how to fix this method so that it will map the triangle ONLY 700 meters in from my current location in the direction that I am facing? Thanks, EDIT/// Converting the outcome to radians gives me a lat of 5.6xxxxxxxxxxxxxx .I have a feeling this bug has something to do with conversions but its not THAT simple. The equation is correct, it just.. outputs wrong..

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  • PDF Manipulation with Adobe's Form Input Fields

    - by Justin
    Hello, I am trying to simplify a process where I currently use my hand calculations of X & Y Co-Ordinates of each value. Which works fine, but is causing me a lot of pain as I have to do quite a number of PDF's. I know that I can open a PDF and insert "input fields" within Adobe Acrobat Pro, which it would be great if I could use PHP to connect to those input fields and insert a value from a PHP Form. WORKFLOW:: PHP FORM PHP PROCESSING ENGINE TO FINAL PDF WITH FORM VALUES IN THE LOCATION OF THE ADOBE INPUT FIELDS. If someone has some information on something like this it would be much appreciated.

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  • iText PdfPTables, document.add with writeSelectedRows

    - by J2SE31
    I am currently modifying an existing system that generates reports with iText and java. The report template is as follows: Header1(PdfPTable) Header2(PdfPTable) Body(PdfPTable) I am currently using the writeSelectedRows to display Header1 and Header2, but document.add is used to display the Body. The problem is that the system is setup to write the headers AFTER the body has already been displayed on the screen, so I am displaying my headers on top of my body content. My question is how do I add my body table (using document.add) and have it display about halfway down the page (or any predetermined vertical position)? This way I would have sufficient room to display my headers above the body table. Note: I believe the body table is using document.add to facilitate automatic paging if the body content is too large.

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