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  • What's going on here? Repeating rows in random list of lists.

    - by Jesse Aldridge
    I expected to get a grid of unique random numbers. Instead each row is the same sequence of numbers. What's going on here? from pprint import pprint from random import random nrows, ncols = 5, 5 grid = [[0] * ncols] * nrows for r in range(nrows): for c in range(ncols): grid[r][c] = int(random() * 100) pprint(grid) Example output: [[64, 82, 90, 69, 36], [64, 82, 90, 69, 36], [64, 82, 90, 69, 36], [64, 82, 90, 69, 36], [64, 82, 90, 69, 36]]

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  • jQuery fadeOut, replaceWith, animate almost working

    - by Jesse
    I am trying to accomplish the following: 1. On click, have a div with id="fader" fadeout 2. replaceHtml of fader with new html (this new HTML will appear below the fold of the browser) 3. Animate new HTML to slide up to the specified location Step 1 and 2 are working, step 3 is not and I'm stumped as to why. Here's the javascript: $("#fader").fadeOut(1000, function() { $(this).replaceWith('<div id=\"fader\" style=\"margin-top:-500px;width:500px;height:400px;border:1px solid black;\">new div</div>', function() { $("#fader").animate({marginTop: "500px"}); }); }); Any thoughts on why the div won't animate would be greatly appreciated, thanks in advance!

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  • Securing a license key with RSA key.

    - by Jesse Knott
    Hello, it's late, I'm tired, and probably being quite dense.... I have written an application that I need to secure so it will only run on machines that I generate a key for. What I am doing for now is getting the BIOS serial number and generating a hash from that, I then am encrypting it using a XML RSA private key. I then sign the XML to ensure that it is not tampered with. I am trying to package the public key to decrypt and verify the signature with, but every time I try to execute the code as a different user than the one that generated the signature I get a failure on the signature. Most of my code is modified from sample code I have found since I am not as familiar with RSA encryption as I would like to be. Below is the code I was using and the code I thought I needed to use to get this working right... Any feedback would be greatly appreciated as I am quite lost at this point the original code I was working with was this, this code works fine as long as the user launching the program is the same one that signed the document originally... CspParameters cspParams = new CspParameters(); cspParams.KeyContainerName = "XML_DSIG_RSA_KEY"; cspParams.Flags = CspProviderFlags.UseMachineKeyStore; // Create a new RSA signing key and save it in the container. RSACryptoServiceProvider rsaKey = new RSACryptoServiceProvider(cspParams) { PersistKeyInCsp = true, }; This code is what I believe I should be doing but it's failing to verify the signature no matter what I do, regardless if it's the same user or a different one... RSACryptoServiceProvider rsaKey = new RSACryptoServiceProvider(); //Load the private key from xml file XmlDocument xmlPrivateKey = new XmlDocument(); xmlPrivateKey.Load("KeyPriv.xml"); rsaKey.FromXmlString(xmlPrivateKey.InnerXml); I believe this to have something to do with the key container name (Being a real dumbass here please excuse me) I am quite certain that this is the line that is both causing it to work in the first case and preventing it from working in the second case.... cspParams.KeyContainerName = "XML_DSIG_RSA_KEY"; Is there a way for me to sign/encrypt the XML with a private key when the application license is generated and then drop the public key in the app directory and use that to verify/decrypt the code? I can drop the encryption part if I can get the signature part working right. I was using it as a backup to obfuscate the origin of the license code I am keying from. Does any of this make sense? Am I a total dunce? Thanks for any help anyone can give me in this..

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  • Set-Cookie error appearing in logs when deployed to google appengine

    - by Jesse
    I have been working towards converting one of our applications to be threadsafe. When testing on the local dev app server everything is working as expected. However, upon deployment of the application it seems that Cookies are not being written correctly? Within the logs there is an error with no stack trace: 2012-11-27 16:14:16.879 Set-Cookie: idd_SRP=Uyd7InRpbnlJZCI6ICJXNFdYQ1ZITSJ9JwpwMAou.Q6vNs9vGR-rmg0FkAa_P1PGBD94; expires=Wed, 28-Nov-2012 23:59:59 GMT; Path=/ Here is the block of code in question: # area of the code the emits the cookie cookie = Cookie.SimpleCookie() if not domain: domain = self.__domain self.__updateCookie(cookie, expires=expires, domain=domain) self.__updateSessionCookie(cookie, domain=domain) print cookie.output() Cookie helper methods: def __updateCookie(self, cookie, expires=None, domain=None): """ Takes a Cookie.SessionCookie instance an updates it with all of the private persistent cookie data, expiry and domain. @param cookie: a Cookie.SimpleCookie instance @param expires: a datetime.datetime instance to use for expiry @param domain: a string to use for the cookie domain """ cookieValue = AccountCookieManager.CookieHelper.toString(self.cookie) cookieName = str(AccountCookieManager.COOKIE_KEY % self.partner.pid) cookie[cookieName] = cookieValue cookie[cookieName]['path'] = '/' cookie[cookieName]['domain'] = domain if not expires: # set the expiry date to 1 day from now expires = datetime.date.today() + datetime.timedelta(days = 1) expiryDate = expires.strftime("%a, %d-%b-%Y 23:59:59 GMT") cookie[cookieName]['expires'] = expiryDate def __updateSessionCookie(self, cookie, domain=None): """ Takes a Cookie.SessionCookie instance an updates it with all of the private session cookie data and domain. @param cookie: a Cookie.SimpleCookie instance @param expires: a datetime.datetime instance to use for expiry @param domain: a string to use for the cookie domain """ cookieValue = AccountCookieManager.CookieHelper.toString(self.sessionCookie) cookieName = str(AccountCookieManager.SESSION_COOKIE_KEY % self.partner.pid) cookie[cookieName] = cookieValue cookie[cookieName]['path'] = '/' cookie[cookieName]['domain'] = domain Again, the libraries in use are: Python 2.7 Django 1.2 Any suggestion on what I can try?

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  • Getting a JPEG image from a hex string in XML.

    - by Jesse Knott
    Well here goes, I am trying to collect a picture that is encoded as a hex string in an xml file. I have been looking all over for the answer to this and have not been able to find it any where. Here is what I have now. byte[] bytes = Convert.FromBase64String(FilterResults("PHOTOGRAPH")); MemoryStream mem = new MemoryStream(bytes); Image bmp2 = Image.FromStream(mem); return bmp2; The FilterResults function just returns the string from the XML. I am able to get the string of characters and convert it into a byte[] but as soon as I execute the Image.FromStream(mem) I get an "Parameter Incorrect" error. Any ideas?

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  • Wanting a simple overview on how to connect to a SQLite database in Cocoa/Objective-C

    - by Jesse
    Hi, everyone. I've been experimenting with Cocoa and Objective-C programming on the Mac for a few months now, and I am wanting to start developing applications that manage large amounts of data. The trouble is, I'm not really sure where to start with databases. I have a good background in Java programming with SQLite. I've read a bit about CoreData and I haven't been able to find any good resources for just manually connecting to the database. I'm looking for recommendations. Should I try CoreData, and if so, can anyone recommend a good tutorial for someone new to the language? Or, should I try to manually connect and query an SQLite database somehow, and, if so, any tutorials? Any help would be greatly appreciated! Thanks!

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  • ExternalInterface

    - by Jesse
    Hey, so I'm having a bunch of trouble getting ExternalInterface to work, which is odd, because I use it somewhat often. I'm hoping it's something I just missed because I've been looking at it too long. The flash_ready function is correctly returning the objectID, and as far as I can tell, everything else is in order. Unfortunately, when I run it, I get an error (varying by browser) telling me that basically document.getElementById(<movename>).test() is not a valid method. Here's the code: javascript: function flash_ready(i){ document.getElementById(i).test('success!'); } Embed Html (Generated): <script type="text/javascript"> swfobject.embedSWF("/chainmaille/includes/media/flash/upload_image.swf", "/chainmaille/includes/media/flash/upload_image", "500", "50", "9.0.0","expressInstall.swf", {}, {allowScriptAccess:'always', wmode:'transparent'},{id:'uploader_flash',name:'uploader_flash'}); </script> <object type="application/x-shockwave-flash" id="uploader_flash" name="uploader_flash" data="/chainmaille/includes/media/flash/upload_image.swf" width="500" height="50"><param name="allowScriptAccess" value="always"><param name="wmode" value="transparent"></object> AS3 : package com.jesseditson.uploader { import flash.display.MovieClip; import flash.external.ExternalInterface; import flash.system.Security; public class UI extends MovieClip { // Initialization: public function UI() { Security.allowDomain('*'); ExternalInterface.addCallback("test", test); var jscommand:String = "flash_ready('"+ExternalInterface.objectID+"');"; var url:URLRequest = new URLRequest("javascript:" + jscommand + " void(0);"); navigateToURL(url, "_self"); } public function test(t){ trace(t); } } } Swfobject is being included via google code, and the flash embeds just fine, so that's not the problem. I've got a very similar setup working on another server, but can't seem to get it working on this one. It's a Hostgator shared server. Could it be the server's fault? Anybody see any obvious syntax problems? Thanks in advance!

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  • How do I antialias the clip boundary on Android's canvas?

    - by Jesse Wilson
    I'm using Android's android.graphics.Canvas class to draw a ring. My onDraw method clips the canvas to make a hole for the inner circle, and then draws the full outer circle over the hole: clip = new Path(); clip.addRect(outerCircle, Path.Direction.CW); clip.addOval(innerCircle, Path.Direction.CCW); canvas.save(); canvas.clipPath(clip); canvas.drawOval(outerCircle, lightGrey); canvas.restore(); The result is a ring with a pretty, anti-aliased outer edge and a jagged, ugly inner edge: What can I do to antialias the inner edge? I don't want to cheat by drawing a grey circle in the middle because the dialog is slightly transparent. (This transparency isn't as subtle on on other backgrounds.)

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  • Conditionan Action in SSRS

    - by Jesse
    I want my textbox to have an action ONLY if the condition is true, otherwise no action. This is what I have as my current action expression for going to another report: =IIf(Fields!MyTextbox.Value = "0", "Report2","") This does not produce my desired result. It gives the textbox an action regardless of the condition result. Is there a 'No Action' or 'Cancel Action' value?

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  • View an item without republishing everything?

    - by Jesse Millikan
    I'm getting this error when trying to view a Sitecore item based on a template that contains nothing but one sublayout played in a placeholder in another layout. I can place the sublayout in other sublayouts and view it on another item, and I can preview the item, but when I go to view that item I get this: The layout for the requested document was not found. [blah blah blah] Requested Layout: {00000000-0000-0000-0000-000000000000} [blah blah blah some more] The only way I've found to view the new item is to do a "Publish Site" from the Publish tab. Is there a way to get that one item working without republishing everything?

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  • Patterns for simulating optional "out" parameters in C#?

    - by Jesse McGrew
    I'm translating an API from C to C#, and one of the functions allocates a number of related objects, some of which are optional. The C version accepts several pointer parameters which are used to return integer handles to the objects, and the caller can pass NULL for some of the pointers to avoid allocating those objects: void initialize(int *mainObjPtr, int *subObjPtr, int *anotherSubObjPtr); initialize(&mainObj, &subObj, NULL); For the C# version, the obvious translation would use out parameters instead of pointers: public static void Initialize(out int mainObj, out int subObj, out int anotherSubObj); ... but this leaves no way to indicate which objects are unwanted. Are there any well-known examples of C# APIs doing something similar that I could imitate? If not, any suggestions?

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  • how to remove dynamically loaded images in javascript

    - by jesse
    I'm loading in 3 images (named 1.jpg, 2.jpg, 3jpg) dynamically to 3 divs called "div1", "div2" and "div3". function loadImages() { for (var i = 1; i < 3; i++ ) { var img = document.createElement("img"); img.src = "vegetables/"+i+".jpg"; img.id = "a"+i+""; var divName = "div"+i+""; document.getElementById(divName).appendChild(img); } } That works, but the removing part I can't seem to get to work.. function removeImages() { for (var i = 1; i < 3; i++ ) { var oldImages = "a"+i+""; var divName = "div"+i+""; document.getElementById(divName).removeChild(oldImages); } } Thank you.

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  • Dealing with external processes

    - by Jesse Aldridge
    I've been working on a gui app that needs to manage external processes. Working with external processes leads to a lot of issues that can make a programmer's life difficult. I feel like maintenence on this app is taking an unacceptably long time. I've been trying to list the things that make working with external processes difficult so that I can come up with ways of mitigating the pain. This kind of turned into a rant which I thought I'd post here in order to get some feedback and to provide some guidance to anybody thinking about sailing into these very murky waters. Here's what I've got so far: Output from the child can get mixed up with output from the parent. This can make both outputs misleading and hard to read. It can be hard to tell what came from where. It becomes harder to figure out what's going on when things are asynchronous. Here's a contrived example: import textwrap, os, time from subprocess import Popen test_path = 'test_file.py' with open(test_path, 'w') as file: file.write(textwrap.dedent(''' import time for i in range(3): print 'Hello %i' % i time.sleep(1)''')) proc = Popen('python -B "%s"' % test_path) for i in range(3): print 'Hello %i' % i time.sleep(1) os.remove(test_path) I guess I could have the child process write its output to a file. But it can be annoying to have to open up a file every time I want to see the result of a print statement. If I have code for the child process I could add a label, something like print 'child: Hello %i', but it can be annoying to do that for every print. And it adds some noise to the output. And of course I can't do it if I don't have access to the code. I could manually manage the process output. But then you open up a huge can of worms with threads and polling and stuff like that. A simple solution is to treat processes like synchronous functions, that is, no further code executes until the process completes. In other words, make the process block. But that doesn't work if you're building a gui app. Which brings me to the next problem... Blocking processes cause the gui to become unresponsive. import textwrap, sys, os from subprocess import Popen from PyQt4.QtGui import * from PyQt4.QtCore import * test_path = 'test_file.py' with open(test_path, 'w') as file: file.write(textwrap.dedent(''' import time for i in range(3): print 'Hello %i' % i time.sleep(1)''')) app = QApplication(sys.argv) button = QPushButton('Launch process') def launch_proc(): # Can't move the window until process completes proc = Popen('python -B "%s"' % test_path) proc.communicate() button.connect(button, SIGNAL('clicked()'), launch_proc) button.show() app.exec_() os.remove(test_path) Qt provides a process wrapper of its own called QProcess which can help with this. You can connect functions to signals to capture output relatively easily. This is what I'm currently using. But I'm finding that all these signals behave suspiciously like goto statements and can lead to spaghetti code. I think I want to get sort-of blocking behavior by having the 'finished' signal from QProcess call a function containing all the code that comes after the process call. I think that should work but I'm still a bit fuzzy on the details... Stack traces get interrupted when you go from the child process back to the parent process. If a normal function screws up, you get a nice complete stack trace with filenames and line numbers. If a subprocess screws up, you'll be lucky if you get any output at all. You end up having to do a lot more detective work everytime something goes wrong. Speaking of which, output has a way of disappearing when dealing external processes. Like if you run something via the windows 'cmd' command, the console will pop up, execute the code, and then disappear before you have a chance to see the output. You have to pass the /k flag to make it stick around. Similar issues seem to crop up all the time. I suppose both problems 3 and 4 have the same root cause: no exception handling. Exception handling is meant to be used with functions, it doesn't work with processes. Maybe there's some way to get something like exception handling for processes? I guess that's what stderr is for? But dealing with two different streams can be annoying in itself. Maybe I should look into this more... Processes can hang and stick around in the background without you realizing it. So you end up yelling at your computer cuz it's going so slow until you finally bring up your task manager and see 30 instances of the same process hanging out in the background. Also, hanging background processes can interefere with other instances of the process in various fun ways, such as causing permissions errors by holding a handle to a file or someting like that. It seems like an easy solution to this would be to have the parent process kill the child process on exit if the child process didn't close itself. But if the parent process crashes, cleanup code might not get called and the child can be left hanging. Also, if the parent waits for the child to complete, and the child is in an infinite loop or something, you can end up with two hanging processes. This problem can tie in to problem 2 for extra fun, causing your gui to stop responding entirely and force you to kill everything with the task manager. F***ing quotes Parameters often need to be passed to processes. This is a headache in itself. Especially if you're dealing with file paths. Say... 'C:/My Documents/whatever/'. If you don't have quotes, the string will often be split at the space and interpreted as two arguments. If you need nested quotes you can use ' and ". But if you need to use more than two layers of quotes, you have to do some nasty escaping, for example: "cmd /k 'python \'path 1\' \'path 2\''". A good solution to this problem is passing parameters as a list rather than as a single string. Subprocess allows you to do this. Can't easily return data from a subprocess. You can use stdout of course. But what if you want to throw a print in there for debugging purposes? That's gonna screw up the parent if it's expecting output formatted a certain way. In functions you can print one string and return another and everything works just fine. Obscure command-line flags and a crappy terminal based help system. These are problems I often run into when using os level apps. Like the /k flag I mentioned, for holding a cmd window open, who's idea was that? Unix apps don't tend to be much friendlier in this regard. Hopefully you can use google or StackOverflow to find the answer you need. But if not, you've got a lot of boring reading and frusterating trial and error to do. External factors. This one's kind of fuzzy. But when you leave the relatively sheltered harbor of your own scripts to deal with external processes you find yourself having to deal with the "outside world" to a much greater extent. And that's a scary place. All sorts of things can go wrong. Just to give a random example: the cwd in which a process is run can modify it's behavior. There are probably other issues, but those are the ones I've written down so far. Any other snags you'd like to add? Any suggestions for dealing with these problems?

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  • Using ManagementObject to retrieve a single WMI property

    - by Jesse
    This probably isn't the best way, but I am currently retrieving the amount of RAM on a machine using: manageObjSearch.Query = new ObjectQuery("SELECT TotalVisibleMemorySize FROM Win32_OperatingSystem"); manageObjCol = manageObjSearch.Get(); foreach (ManagementObject mo in manageObjCol) sizeInKilobytes = Convert.ToInt64(mo["TotalVisibleMemorySize"]); It works well and good, but I feel I could be doing this more directly and without a foreach over a single element, but I can't figure out how to index a ManagementObjectCollection I want to do something like this: ManagementObject mo = new ManagementObject("Win32_OperatingSystem.TotalVisibleMemorySize") mo.Get(); Console.WriteLine(mo["TotalVisibleMemorySize"].ToString()) or maybe even something like ManagementClass mc = new ManagementClass("Win32_OperatingSystem"); Console.WriteLine(mc.GetPropertyValue("TotalVisibleMemorySize").ToString()); I just can't seem to figure it out. Any ideas?

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  • Images in database vs file system

    - by Jesse
    We have a project coming up where we will be building a whole backend CMS system that will power our entire extranet and intranet with one package. The question I have been trying to find an answer to is which is better: storing images in the database (SQL Server 2005) so we may have integrity, single replication plan, etc OR storing on the file system? One issue we have is that we have multiple servers load balanced that require to have the same data at all times. As of now we have SQL replication taking care of that but file replication seems to be a little tougher. Another concern we have is that we would like to have multiple resolutions of the same image, we are not sure if creating and storing each version on the file system would be best or maybe dynamically pulling and creating the resolution image we would like upon request. Our concerns are the with the following: Data integrity Data replication Multiple resolutions Speed of database vs file system Overhead load of database vs file system Data management and backup Does anyone have a similar situation or have any input on what would be recommended? Thanks in advance for the help!

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  • What is the best way to limit the amount of text that can be entered into a 'textarea'?

    - by Jesse Taber
    What is the best way to limit the amount of text that a user can enter into a 'textarea' field on a web page? The application in question is ASP .NET, but a platform agnostic answer is preferred. I understand that some amount of javascript is likely needed to get this done as I do not wish to actually perform the 'post' with that amount of data if possible as ASP .NET does have an upper limit to the size of the request that it will service (though I don't know what that is exactly). So maybe the real question is, what's the best way to do this in javascript that will meet the following criteria: -Must work equally well for both users simply typing data and copy/paste'ing data in from another source. -Must be as '508 compliance' friendly as possible.

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  • How to deal with symbolic links when going between Linux and Windows?

    - by Jesse Beder
    I have a django project that runs on a Linux server, and I've been working on it both on Linux and OS X. I've noticed that some of the pages are a bit off, to put it politely, in Internet Explorer, and so I checked out the subversion repository on Windows and tried to run a local server. My media directory has symbolic links to all of the media from each different app, and obviously Windows doesn't know what to do with them. I could simply hard-copy or link everything manually in Windows, but then I wouldn't be able to check that in (since the site runs on a Linux server), so it'd be a pain in the neck. What is typically done in this case?

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  • Question about member function pointers in a heirarchy

    - by Jesse Beder
    I'm using a library that defines an interface: template<class desttype> void connect(desttype* pclass, void (desttype::*pmemfun)()); and I have a small heirarchy class base { void foo(); }; class derived: public base { ... }; In a member function of derived, I want to call connect(this, &derived::foo); but it seems that &derived::foo is actually a member function pointer of base; gcc spits out error: no matching function for call to ‘connect(derived* const&, void (base::* const&)())’ I can get around this by explicitly casting this to base *; but why can't the compiler match the call with desttype = base (since derived * can be implicitly cast to base *)? Also, why is &derived::foo not a member function pointer of derived?

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  • Is there anything exciting in perl 5.11 (to become perl 5.12)?

    - by Ether
    Perl 5.11 is now released! Is there anything really exciting in this release, or is it mostly maintenance patches? (From what I've read so far, it appears to be a rollup of improvements we have already seen in prior releases.) the CHANGES file Jesse Vincent's announcement chromatic's blog post 5.11 is the development release of what will become 5.12. The release process itself is changing to a monthly release model. UPDATE: Perl 5.12 is now released (April 12, 2010). the CHANGES file Jesse Vincent's announcement

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  • Terminate subprocess in Windows, access denied

    - by Jesse Aldridge
    - import time import subprocess from os.path import expanduser chrome_path = expanduser('~\Local Settings\Application Data\Google\Chrome\Application\chrome.exe') proc = subprocess.Popen(chrome_path) time.sleep(4) proc.terminate() Output: WindowsError: [Error 5] Access is denied How can I kill the Chrome process?

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  • How to modulate every texture unit in OpenGL ES 1.1?

    - by Jesse Beder
    I have two textures and a "blend factor", and I'd like to mix them, modulated by the current color; in effect, I want to use the following shader: gl_FragColor = gl_Color * mix(tex0, tex1, blendFactor); I'm using OpenGL ES 1.1, targeting all versions of the iPhone, so I can't use shaders, and I have two texture units. My best attempt is: // texture 0 glActiveTexture(GL_TEXTURE0); image1.Bind(); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); // texture 1 glActiveTexture(GL_TEXTURE1); image2.Bind(); glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_INTERPOLATE); glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR); glTexEnvi(GL_TEXTURE_ENV, GL_SRC2_RGB, GL_CONSTANT); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_RGB, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_INTERPOLATE); glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, GL_PREVIOUS); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA); glTexEnvi(GL_TEXTURE_ENV, GL_SRC2_ALPHA, GL_CONSTANT); glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND2_ALPHA, GL_SRC_ALPHA); const float factor[] = { 0, 0, 0, blendFactor }; glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, factor); This has the effect of the shader: gl_FragColor = mix(gl_Color * tex0, tex1, blendFactor); but I don't see how to module texture 1 by the color. Is there any way to have the color provided by a texture unit automatically modulated by the incoming primary color? Or any other way to do what I want that I'm missing? Multiple passes are definitely allowed, but they have to have the proper blend effect; I have glBlend(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); enabled, so it can be tricky to get right with multiple passes.

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