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• Drawing bezier curve with limited subdivisions in OpenGL

  - by xEnOn

  Is it possible to tell OpenGL to draw a 4 degree (5 control points) bezier curve with 10 subdivisions? I was trying with this: point ctrlpts[] = {..., ..., ..., ...}; glMap1f(GL_MAP1_VERTEX_3, 0, 1, 3, 5, ctrlpts); glBegin(GL_LINE_STRIP); for (i = 0; i <= 30; i++) glEvalCoord1f((GLfloat) i/30.0); glEnd(); But this just draws the curve nicely. I am thinking that I want the algorithm inside the bezier curve to draw only until 10 subdivisions and then stop. The line should look a little facet.

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• Will GTK's pango and cairo work well in Cocoa and MFC applications.

  - by Lothar

  I'm writing a GUI program and decided to go native on all platforms. But for all the stuff i need to draw myself i would like to use the same drawing routines because font and unicode handling is so difficult and complex. Do you see any negative points in useing Pango/Cairo. Well on MacOSX i havent succeded installing Pango/Cairo yet. Looks like a bad Omen. I would also like to hear about the performance penality. The first time i looked at Pango i thought, yes thats the reason why Software is still getting despite better hardware.

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• Microsoft chart

  - by user222820

  hi there i am writing a program in c# windows app and i use the microsoft chart component i have 100 string in an array and 100 double in an array and i wanna draw a chart with these arrays but i have a problem it draws chart with 5 or 6 column what shoud i do with this problem string[] dates = new string[100]; double[] values = new double[100]; for (int i = 0; i <= 99; i++) { dates[i] = "1/1/138" + i.ToString(); values[i] = i; } s.Series[0].Points.DataBindXY(dates, values);

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• Is there a way to programmatically extract the feed of a podcast from the iTunes page?

  - by J. Pablo Fernández

  From an iTunes page, like http://itunes.apple.com/us/podcast/this-week-in-tech-mp3-edition/id73329404, is there a way to extract the corresponding feed address? In this case it would be http://leoville.tv/podcasts/twit.xml. I know that if you open on iTunes you can extract it manually, but I want to do it programmatically. There's a link to the website of the podcast, but it may not be accurate. In this case it points to a web site with 20 podcasts on it.

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• Does Seaside scale?

  - by Richard Durr

  Seaside is known as "the heretical web framework". One of the points that make it heretical is that it has much shared state. That however is something which, in my current understanding, hinders easy scaling. Ruby on rails on the other hand shares as less state as possible. It has been known to scale pretty well, even if it is dog slow compared to modern smalltalk vms. flickr uses php and has scaled to an extremly big infrastructure... So has anybody some experience in the scaling of Seaside?

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• google maps v3 distance

  - by Shane

  Trying to create a new version of the map functions seen here: http://www.daftlogic.com/projects-google-maps-distance-calculator.htm but using the v3 api. So far I am able to set markers on click and can draw the geodesic polyline. The issues I am currently running into are: Updating the poly-line on marker drag I'm pretty sure I have to put each marker in an array and do a for loop so that I can keep clicking and adding points that will add to the total distance. Properly displaying distance. I have created a jsfiddle: http://jsfiddle.net/wyZyS/ EDIT: I realize I have nothing calling the "update" function. I am trying to create the array for each marker currently. The calculation you see is converting meters to nautical miles.

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• What parameters should I use in a Google Maps URL to go to a lat-lon?

  - by xpda

  I would like to produce a url for Google Maps that goes to a specific latitude and longitude. Now, I generate a url such as this: http://maps.google.com/maps?z=11&t=k&q=58 41.881N 152 31.324W The resulting map comes up with a round "A" balloon pointer, which seems to point to the nearest named object, and a green arrow, which points to the lat-lon. Sometimes, as in this example, the "A" pointer is centered and is far enough away that you cannot see the pointer to the lat-lon. (Zoom out to see both pointers in this example. The "A" pointer is in the center of Alaska, while the lat-long pointer is on Kodiak Island.) Are there some parameters I can use in the Google Maps URL that will produce a single pointer to a designated lat-lon? (This loads in a separate window. It is not embedded.)

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• GCC/XCode equivalent of _CrtCheckMemory?

  - by Chris Becke

  When dealing with random memory overwrites, in MSVC it is possible to validate the state of the heap at various points with a call to _CrtCheckMemory, and know with at least a small level of confidence that the code up until the check was not responsible for any errors that might cause new or malloc to fail later. In XCode, whats the equivalent way to try and box in a memory overwrite? All I have at the moment is a random failure of a call to new, somewhere deep in the bowels of some code with no real idea of how long the code has been running with a corrupt heap up until that point.

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• SciPy interp1d results are different than MatLab interp1

  - by LMO

  I'm converting a MatLab program to Python, and I'm having problems understanding why scipy.interpolate.interp1d is giving different results than MatLab interp1. In MatLab the usage is slightly different: yi = interp1(x,Y,xi,'cubic') SciPy: f = interp1d(x,Y,kind='cubic') yi = f(xi) For a trivial example the results are the same: MatLab: interp1([0 1 2 3 4], [0 1 2 3 4],[1.5 2.5 3.5],'cubic') 1.5000 2.5000 3.5000 Python: interp1d([1,2,3,4],[1,2,3,4],kind='cubic')([1.5,2.5,3.5]) array([ 1.5, 2.5, 3.5]) But for a real-world example they are not the same: x = 0.0000e+000 2.1333e+001 3.2000e+001 1.6000e+004 2.1333e+004 2.3994e+004 Y = -6 -6 20 20 -6 -6 xi = 0.00000 11.72161 23.44322 35.16484... (2048 data points) Matlab: -6.0000e+000 -1.2330e+001 -3.7384e+000 ... 7.0235e+000 7.0028e+000 6.9821e+000 SciPy: array([[ -6.00000000e+00], [ -1.56304101e+01], [ -2.04908267e+00], ..., [ 1.64475576e+05], [ 8.28360759e+04], [ -5.99999999e+00]]) Any thoughts as to how to can get results that are consistent with MatLab?

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• plot 3D and combine in matlab

  - by George

  Hello ,i have this matrix "experiment=2*rand(npoints,3)-1". I want to plot in in 3D,so i use "mesh(experiment)". How can i take red points in my plot? Also,i want to implement in the above plot , a sphere with radius 1 at 0,0,0. I did : mesh(experiment) hold on [x,y,z]=sphere; r=1; mesh(r*x,r*y,r*z) hold off but 1) i am not taking radius 1 2) the figures just showing in the same graph but don't combine Thanks

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• IE 8 html parsing error message.

  - by user48408

  I'm experiencing the problem outlined in this kb article. http://support.microsoft.com/kb/927917 . Sorry I can't hyperlink cos i don't have enough points! "This problem occurs because a child container HTML element contains script that tries to modify the parent container element of the child container. The script tries to modify the parent container element by using either the innerHTML method or the appendChild method." The problem I'm having diagnosing the source of my problem is 2 fold: 1) This is only happening on some client machines (All are running IE8) and not others. How/Why only some? 2) I don't have any scripts which modify the innerHTML or call appendChild on any dom elements. I do have server side code which modify properties on asp .net server controls. (Essentially all thats happening is a panel control with some more controls is being made visbile or invisible on a button click), would these in turn then set the innerHTML property of the client rendered control(?)

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• What are the typical reasons Javascript developed on Firefox fails on IE?

  - by karlthorwald

  I developed some javascript enhanced pages that run fine on recent Firefox and Safari. I missed to check in Internet Explorer, and now I find the pages don't work on IE 6 and 7 (so far). The scripts are somehow not executed, the pages show as if javascript wasn't there, although some javascript is executed. I am using own libraries with dom manipulation, from YUI 2 I use YUI-Loader and the XML-Http-Request, and on one page I use "psupload", which depends on JQuery. I am installing Microsoft Script Editor from Office XP and will now debug. I will also write specific tests now. What are the typical failing points of IE? What direction I can keep my eyes open. I found this page, which shows some differences: http://www.quirksmode.org/compatibility.html Can you from your experience name some typical things I should look for first? I will also ask more questions here for specific tasks later, but for now I am interested in your experience why IE usually fails on scripts that run fine in Firefox

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• googlemap zoom in iphone application

  - by Filthy Night

  Hi all, i have a problem in iphone application that i have integrated google map and i am calculating center runtime so that the map shows both points on the iphone screen, the alogrithm applied (thanks to stackover flow) is working fine in case of 2 locations very far from each other. But it is not working for near locations and the zoom level goes too much that it is not able to show any images of those two near locations, so i want to put a check that if the location are very near to each other OR the google is not able to show the maps of the locations then it choose the default zoom level so that it shows the map on the screen instead of blank / black screen. Thanks in advance

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• Pass Value between MDI Child in WinForm using C#

  - by abhilashca

  I have an MDI Parent, containing a MenuStrip. When I click on one of the Menu, two Child Forms are displayed simultaneoulsy. I have a TextBox and a Send Button on one of my ChildForm. When I type-in something in that TextBox and Click the Send Button, I need to show that value in the TextBox of my Second Child Form. What I had done is, I wrote a Public Function in the Second Child Form and tried to invoke it by creating an object of Second Form, on the Send Button click event. When I put break points, in that Public Function, I find that the control is flowing through that Public function on cliking the Send button. But the passed value is not displayed. And, I know that is not the standard way to do that. Any sample script for help? Thanks.

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• Building a minimal plugin architecture in Python.

  - by dF

  I have an application, written in Python, which is used by a fairly technical audience (scientists). I'm looking for a good way to make the application extensible by the users, i.e. a scripting/plugin architecture. I am looking for something extremely lightweight. Most scripts, or plugins, are not going to be developed and distributed by a third-party and installed, but are going to be something whipped up by a user in a few minutes to automate a repeating task, add support for a file format, etc. So plugins should have the absolute minimum boilerplate code, and require no 'installation' other than copying to a folder (so something like setuptools entry points, or the Zope plugin architecture seems like too much.) Are there any systems like this already out there, or any projects that implement a similar scheme that I should look at for ideas / inspiration?

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• GIS: line_locate_point() in Python

  - by miracle2k

  I'm pretty much a beginner when it comes to GIS, but I think I understand the basics - it doesn't seem to hard. But: All these acronyms and different libraries, GEOS, GDAL, PROJ, PCL, Shaply, OpenGEO, OGR, OGC, OWS and what not, each seemingly depending on any number of others, is slightly overwhelming me. Here's what I would like to do: Given a number of points and a linestring, I want to determine the location on the line closest to a certain point. In other words, what PostGIS's line_locate_point() does: http://postgis.refractions.net/documentation/manual-1.3/ch06.html#line%5Flocate%5Fpoint Except I want do use plain Python. Which library or libraries should I have a look at generally for doing these kinds of spatial calculations in Python, and is there one that specifically supports a line_locate_point() equivalent?

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• deriving activity diagram-based GUIs and CRUD them with a DB?

  - by Xin Tanaka

  i received a big book full of processes. i was thinking about the end user (they will be lawyers) and decided the best GUI would be showing activity diagrams or business processes. It reminded me Quickbooks and how non-accountants can successfully use it and understand accounting processes. i began doing research before sending my project to a bunch of programmers: is there some open source solution? can i use MS Visio libraries? which UML tool is programable? what about Eclipse and its modeling tools? etc etc the key points here are: relationships between events, artifacts, actors, etc should be stored in a database. processes or steps in a process should be easily modified by updating the database do this sounds too crazy? (should I explain a bit more why it must be programmed this way?)

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• Python: Embed Chaco in PyQt4 Mystery

  - by random guy

  How do i go about adding Chaco to an existing PyQt4 application? Hours of searches yielded little (search for yourself). So far i've figured i need the following lines: import os os.environ['ETS_TOOLKIT']='qt4' i could not find PyQt4-Chaco code anywhere on the internets i would be very grateful to anyone filling in the blanks to show me the simplest line plot possible (with 2 points) from PyQt4 import QtCore, QtGui import sys import os os.environ['ETS_TOOLKIT']='qt4' from enthought <blanks> : : app = QtGui.QApplication(sys.argv) main_window = QtGui.QMainWindow() main_window.setCentralWidget(<blanks>) main_window.show() app.exec_() print('bye') what Chaco/Enthought class inherits from QWidget ?

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• Does C++11 offer a better way to concatenate strings on the fly?

  - by Lohoris

  I've seen this answer, and I wonder (I hope) if C++11 has come up with a native better method to concatenate, and possibly format, strings. With "better" I mean actually really one-line, like in pretty much all higher level languages (bonus points if it supports something like python's "formatted string"%(tuple) syntax but I guess that's really hoping for too much). The ideal result should be something like: my_func("bla bla bla" << int(my_int) << "bla bla bla"); The only barely acceptable methods listed in that answer are the fastformat ones, but I wonder if C++11 managed to do better.

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• How do I pass a parameter from the select list into a function for joining a linq query?

  - by Ryan ONeill

  I have a query that can be summarised in SQL as follows; Select S.StockCode From StockToCheck As S Inner Join GetPOSStock(S.StockCode) As C On S.StockCode = C.StockCode; I'm trying to do the same in Linq but it seems I cannot pass a parameter to the function I am joining on as it has not been parsed by Linq. I imagine it would look like this (vb); Dim x = From S In StockToCheck Join C In GetPOSStock(S) On S Equals C.ProductCode Where the S var is a list of strings. This gives the error 'S' is not declared and points to the S in the function call / join (GetPOSStock). So it does not seem possible to do this in Linq, can anyone confirm? Thanks in advance Ryan

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• Can only access asp.net app on localhost

  - by Kevin Donn

  I'm trying to get an asp.net application up on IIS on a Windows Server 2008 machine. I can hit the app from localhost, no problem. But I can't access the app using the server's domain name either locally or from another machine on the network. But here's the odd part. I can access a normal file on IIS using the domain name, both from a browser running on the server and from a browser running on another machine on the network. Here's a synopsis ("http" converted to "htp" below because I don't have enough points to have all these links in my message): From IE on the server itself: works htp://localhost/foo.htm works htp://localhost/App works htp://test.foo.com/foo.htm dead htp://test.foo.com/App From IE on another machine: works htp://test.foo.com/foo.htm dead htp://test.foo.com/App And when I say "dead" I mean the request times out. Any ideas?

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• Firefox why window.opener is defined even for a new tab

  - by jonny

  Hi! I am porting quite old corp application from IE to Firefox. Here is my situation. User goes away from computer for a while and his session becomes expired. When user tries to access something in popup, he is being redirected to login page (in popup window). In login page onload event popup window chain is being closed and root page refreshed (in root page tab user is redirected to login page). The guy before me wrote this like this: if window.top.opener is undefined, we're not in popup. That's why I am getting non-stoppable refresh in Firefox. Why in Firefox window.opener is still defined and points to same window, even if this is a new tab, not popup? How should I correctly determine that current window is popup?

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• Does Python work in larger teams?

  - by Kugel

  I read this post last night and it got me thinking. I like python and "batteries", pypi and such. But I've only done python solo. Never tried it in a team. Are the points that Ted mentions valid? If they are how do teams cope with them? Does Python work in teams or even large teams? Or it kills productivity? I personally see the problems he mentions when I come back to my old code. Even when working with other modules sometimes I need to peek inside. I would like to hear people with experience on this.

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• How to Format Code in Research Reports

  - by RoseOfJericho

  I am currently writing a formal research report, and I'll be including code with this report. Question: Is there an accepted way of displaying code in research reports? I'm thinking both in terms of font, spacing, et cetera, and whether the code should be displayed inside the document, or in an appendix. The code will be JavaScript and PHP. None of the sections of code will be more than 25 lines (so they're mere snippets). There will be approx. half a dozen snippets. Each of the snippets will have a couple of paragraphs explaining what is happening in the code, and a discussion on its pros/cons. I have no contact with the body the report will be submitted to, and they have no published guidelines on how to format code (please do not question these points). Any help considered and appreciated.

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• MS-Access 2007 Runtime SendObject Crash

  - by ccraiff

  I have programmed an Access Database program using Access 2007. I have a button that points to the event: DoCmd.SendObject acSendReport to have it email a PDF report (acFormatPDF). Everything works fine in the normal Access 2007 program, but when a user opens the program with Access 2007 Runtime, when clicking on this button it goes through the normal steps (notifying Outlook, waiting for Allow/Deny clearance), and then after you click Allow, the program crashes with a Runtime Error. Does anybody know what is going on here? Is this a normal error with Access Runtime? I have tried other file formats (RTF and XLS) instead of PDF, but it seems to be the SendObject command that is crashing the Runtime Environment? Clarification: Access Runtime does not output an error code upon this crash. Just a window stating a "runtime error has occurred".

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