Posts by cwarn23

No it isnt, not at all. To calculate pi precisely using an actual model you would need an amazingly accurate circle.

Its obvious your not understanding what i am talking about so its rather futile. What i am trying to say is that maths and diagrams are not perfect representations of each other. Just because your MS Paint doesn't work for pi doesn't mean much. pi is made for circles, and i would count any circle made my MS Paint that is only 10 pixels wide to not be an actual circle and rather a many sided shape (polygon)

someone back me up here? :S

EDIT: Read this http://mathforum.org/library/drmath/view/58308.html it explains everything

If you believe Paint or any other circle drawing program isn't accurate then let me demonstrate in a 3d model using 3d blender. I have drawn a perfect circle using 12 cyphers and if you connect them it will make your circle. However, in real life they are bunched together like in the MS Paint model. This is because each atom is so tiny that each atom does not have enough sides to form the perfect circle. Basically in the 3d model because there are 32 sides for the cylinder that means it can attach on whatever angle. However if they can only attach on the sides or direct diagonal that is where the MS Paint model is by far more accurate. This is really going into atomic physics now. You will find that atoms cannot …

But maths isnt digital.. Thats the magic of it, its not bound by the laws of nature.

And if you call something of 10 atoms of diameter a circle, you would have mathematicians up in arms because it could probably be classified as a polygon. This shape may not live up to the expectations of pi

But mathematically, a shape of 10 units (no matter how small) wide that was a perfect circle would obey the rule of pi and make 3.14... as the value of pi.

So its up to you if you interpret in a mathematical way or in a graphical/environmental way.

And also think, if pi could be disproved. Wouldn't one of the millions of brilliant mathematicians done it already?

If you believe it would still be 3.1415 then draw a circle on a grid of 10 by 10 in paint then divide number of pixels in the circumference by the number of pixels in the diameter and see if that equals pi. That test revels pi is false. And yes that is an accurate circle even though it looks very pixulated. I am writing a formula that will calculate the true circumference based on the number of pixels/atoms on the horizontal diameter and the diagonal diameter as they are two different numbers for half the circles.

Uh, sorry to burst your bubble. But a circumference is not the measure of atoms in the circle. Its the measure of distance, so therefore you have to measure the difference between 2 pixels, a diagonal it would be. But that isnt a proper circle. So then you would bisect the diagonal and make it into two diagonals between two pixels. But that still isnt a perfect circle so then you would do that again and again, never finding a perfect circle and thats why you can tell there is no end to pi. Because you can never get a measurable amount of 'atoms' that make up a circle without the circle not being a perfect circle.

kapish?

Well I would hate to spoil the surprise but everything we see in the real world is basically digital. Made of atoms and energy. Then when measuring objects we use measurements that only measure a group of atoms the the number of atoms in that group always varies. It is because we are measuring so many atoms that pi appears to be so long. I have calculated that for about 1cm there would be just a little over 1,000,000,000,000,000 digits to pi. However if you make the circle much smaller (lets say 10 atoms wide) then that means that there hasn't yet been enough loops to get the first couple of digits. It is kinda like Vieta's pi formula where it calculates every circle starting from a circle that is 1 atom …

I don't even know if i would trust Ms Paint to measure something to the nearest cm let alone to decimal places. :S

In MS Paint your not using cm's as the measurement but instead pixels. And pixels can be substituted for atoms. So 1 pixel = 1 atom. And with this info you can count exactly how many atoms are in the diameter and circumference then when you divide the two you will rarely get pi to two or three digits unless the diameter is huge (probably a few trillion pixels/atoms). And you can use any other 2d artwork program for the same, example: Paint Shop Pro or Paint.Net

Unrelated, but now the list of forums I regularly visit on the top of the sidebar is gone?
:(

I wish my favorite or most-used features would quit being defeatured. *sigh*
:(

[edit]I guess it'll make it harder for me to follow the forum, so I'll visit less. Maybe that's the point.

I used to use that and it kept me hoppin' to 3 or 4 forums throughout the day. Now it looks like there's nothing new on the forum.

It was very handy because I have to wait 20 seconds after the page loads before the top menus activate (my slow internet) and the recent forums on the side was a nice and easy way of quickly jumping to another forum. What is with this Dani. Was it the cpu load again?

Here's a creative quote

Here is my latest creative quote

Or another

Two weeks ago you were new to the language now you want to go pro. (selling code)

That brings back memories...

I also have a theory and am still working on a formula to prove that pi is not infinite in length. If pi were infinite in length then the circle would have have an infinite circumference. And using MS Paint I have found that pi is not always 3.1415. It can vary depending on the size of the circle. For example, a circle about 6 atoms in diameter will produce pi of 3 instead of 3.1415... This can be proven with 2d cg models so try to draw a perfect circle in MS Paint. Then count how many dots in the circumference and divide it by the number of dots in the diameter and you will rarely get pi to more than 1 digit for a small circle.

Hi and as I have a lot of free time I thought I would ask if anybody would be interested in making or joining in open source projects. Currently I am working on a php forum project but other ideas are accepted. If you wish to start a new project then you may post your ideas here. Currently for the php forum I have done most of the installer but has a lot to do for the forum.

There is a nice function called the mail() function. Part of standard php and if the server is configured properly it should do the job.

An example of searching through the list is as follows:

$result=mysql_query('SELECT * FROM `table_name_here`') or die(mysql_error());
while ($item=mysql_fetch_assoc($result)) {
    echo '<option value="'.$item['column_name_here'].'">';
    echo $item['column_name_here'].'</option>'."\n";
}

I would suggest searching through a few mysql tutorials...

The old .htaccess password protection. If your trying to protect information on your website then I would recommend setting up a php login system. And as for protecting pictures, simply place the pictures in a mysql database. But because of situations like this I would never recommend using the .htaccess file to protect custom made content. However just keep in mind there are some limitations for the old .htaccess file protection as well as minor advantages.

Product Type:[Drop Down]
Name:
Date:
Print

Your post was kinda hard to understand as there was no direct question but if I am guessing the question right then I would say your product type drop down box can be created with a while loop looping through the results of all products. Then when the product is submitted another query is submitted where it searches for the information relating to the selected product using the mysql Where clause. I think that sums it up but if you can provide some code and a direct question instead of just statements then I may be able to provide some code for you.

How about if there are enough people interested we work together on a team project with the main aim to learn while doing and as for myself, I cover a wide range of languages including html/css/ javascript/java/ php/php-gtk/some c++/gml. So perhaps we could setup several open source projects started by this community. My favourate languages include Java, php and making c++ fps games with the irrilicht engine.
Now that's an idea. Daniweb open source projects...

I have downloaded the ImageMagic Standard Template Library but can't find how to achieve my goal in post #1. Are there any examples for what I want done and have I downloaded the right source (standard template library)?

Hi and I have a simple question. I am designing a c++ application but I need to be able to import pictures from file (nearly all formats) then to place the pixel colors into an array. Also when retrieving the pixel colors it needs to retrieve the RGB scale and the Hue Sat Light scale. Does anybody know of any libraries or any easy ways of doing this as in php this would be a simple job but in c++ am finding it rather difficult. And I am using VC++ in case it makes a difference.

i thought the Big Bang was actually the Egyptian god, Ptah,who masturbated and his ejaculate became the universe.

By any chance does legend say that Ptah released two gas particles like in the youtube video because it would be cool it were part of Egyptian religion.

why don't you create a new thread, rephrased in a manner such that you have a question that can be both understood and answered.

just sayin'

I think the main problem is when I ask a question it's a hard question. Then people like myself answer all of the easy ones. I think that is where the floor is in the system. (People mainly answering the easier questions) As for the solution, I don't know although it isn't that greater problem for most people. I guess it's back to square one...

Thats sounds good but the problem with that is the time it would
take to asses every program. Making a game would not be a bad idea
but it would be hard to evaluate it. Anyways, my suggestion was just
a suggestion, as is yours. So I don't really know. Anyone else have more ideas?

Something simple... Maybe building recognision software. I could easily do that in php. Or perhaps a 3d firworks movie program. The c++ irrlicht gaming engine could easily do that. Hope those ideas help.

Winter because it is nice and warm during winter and in summer it is boiling hot. So a lot of electricity is saved during winter for not having the airconditioning on. In case your wondering why winter is warm it is because of global warming...

f their thread is not being replied to, then there's probably a reason. like their question sucks, and they need to reformulate their question.

continuing to nudge them would only cause all the trash threads to float on the top like so much Atlantic sewage on the Jersey shoreline.

anyhow, we can easily see what threads are not replied to by the BIG RED ZERO in the replies column.

people who care about making sure all posts have been replied to in their forums, can easily click "next" page if they really need something to do.

I guess I will have to use this quote more often...

bumpedy bump bump

Because if you check the threads I still have open today some date back many months ago and can't be botherd to bump those old ones...

I wonder what sort of graphics card it has because I want one. Bit pricy though wonder if I could get it at a discount store.

You can always click the "Unanswered Threads" link on the right side of the screen.

That's useful to know but it would be nice to promote the latest threads which have not been replied to. This way people can see their thread still being alive instead of having to bump it for to keep on the first regular page. The Unanswered Threads link only resolves half the issue and not the half where regular browsers can access the latest unposted threads easier. Would be nice to see such a feature like the one on youtube...

This topic is about asking for an additional feature to daniweb which would save some topic bumping and remove some of the annoyance of posting a new topic. Would it be possible to make the last 5 threads with 0 posts to automatically display/pin at the top of the list for a certain period of time (eg 1 week) because I have noticed when ever posting a topic it doesn't take long until you need to go back a page or two to view your newly posted thread. Just a suggestion and would be interested to see the result.

Hi and I have tried some UV mapping in blender and although it can be handy in some situations I have found it to not do the job for my situation. Basically all I want to do is for a texture to pattern around every face of the object without stretching the image. Does anybody know how to do this or where a tutorial might be because currently as I dont want to stretch the image over the huge object (like I currently know how to do) but instead of patterning it so the same image might be side by side 100 times as it is a large object.
Please send tutorial links etc on how to do so.
Thanks

O'well, found the answer myself when randomly changing code. As Magyver says, you can find the solution be eliminating all of the impossibilities.

bumpedy bump bump!

I managed to import a 3ds file with 3d collisions although I haven't yet embedded gravity however one other problem remains. How to I increase the Line Of Sight for the camera because currently half the model is being chopped off at the distance. Does anybody know how to fix this? Please help anybody?

Hi and I have just downloaded the Irrlicht gaming engine and although I have had a briefing about it from a friend I can't seem make it do what I want. I got the demo which is nearly what my result will look like but then I tried switching from the pk3 format to 3ds and am finding this section of it's syntax poorly documented so does anybody know how to do this. Basically by default it loads quake3 maps but I want to use 3ds maps. The related code I'm using is as follows:

/*if (device->getFileSystem()->existFile("map-20kdm2.pk3"))
		device->getFileSystem()->addZipFileArchive("map-20kdm2.pk3");
	else
		device->getFileSystem()->addZipFileArchive("media/map-20kdm2.pk3");*/
	if (device->getFileSystem()->existFile("untitled.3ds"))
		device->getFileSystem()->addFileArchive("untitled.3ds");
	else
		device->getFileSystem()->addFileArchive("media/untitled.3ds");

The commented piece is the original code and the uncommented piece is what I tried replacing with although I experimented with zip files etc. Does anybody know how I can do this and keeping the 3d collisions in place.

If anybody can solve this I shall hand out rep points as I believe it's a hard one. Thanks for any replies that may come.

Try the following:

Options +FollowSymlinks
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([A-Za-z0-9-]+)/?$ categories.php?name=$1

Did you hear that big bang?
What a stupid name for one hell of an explosion!

Then to whoever is reading this what would you name this. My guess is "the boom boom theory". lol or even "the microbang". If you were to name the big bang something else what would you name it?

You need a bunch of 404's and a spamsite? You're strange.

Lol, that makes my day. I could get those any day although I wonder if you had a specific type of 404 in mind. Eg a 404 on googles website lol.

No, maybe it would have a chance once all places in the world are connected to the internet. But I doubt if people would like to place all their data over the internet. Besides, Google already said it is used as a companion device and not something to replace PCs.

It will take 40 years before everybody knows how to use a PC as the average 45 year old does not know how to use a computer. And when people do get their first pc they want something simple. However with googles system you need to have a great understanding of networking devices to troubleshoot networking problems otherwise your google netbook will be useless or in some cases will result in a higher repair bill as network connectivity problems are very urgent with the google netbook. However if you choose windows or the Free Linux then you can wait a month or two before you fix your internet. In addition you don't have to pay for all of that extra bandwidth which the google netbook will use to continually download and upload all of your files and you can't use large files. What if a person only has access to dialup speed internet (common in Australia) and your working on a CAD project which is 500MB. Just won't happen. That is why Windows and Linux is by far better. Linux is my favorite by the way.

We can produce that much energy. As some guys theory (forget the name probably newton) says that for every action made by a force there as an equal reaction. So that means if we can make a narrow consentrated impact on mars then we would push it in the direction we like. And how to create the energy... Simply first create a floating space station that always stays in the same position of space. Then create a rip in the universe which is stored in a generater and collect all of the energy that bursts out of the rip into a buffer. From that buffer/zpm it can then be taken to another location where it is usefull however the power is always being generated in the same spot. So that would be a great form of unlimited energy which will easily do the job once we have the technology.

You still have not explained how you will stop the car. Does this 'opposite force' appear out of nowhere? Please bring the car to a halt - use your knowledge of vectors to explain where the energy of the car goes; while you are at it explain how you apply this 'opposite force'. I might be a jerk but you have not offered anything to your own thread but fairy dust and mystical hand-waving smoke and mirrors.

Changing a planets orbit is not what you are postulating; what you postulate is stopping a planets rotation which is not anything like changing …

So, apply an opposite force to achieve the objective.
If you guys just want to discuss why this can't be done and call me names, please go elsewhere. There's no theoretical reason a planet's orbit can't be changed.

I understand from a theoratical point of view you could achieve altering the planets orbit just like you can blow up the galaxy with a truck, a few pipes, a welder and a microwave - as shown on Macgyver and everything on that show has been proven true. So if we can blow up the galaxy with those items then why not change the orbit of a planet? I'm sure the scientists could speed up some groups of particles to the speed of light colliding with the planet but would require space travel. But it's all theoretical and not yet practical for humans to do. At least for the humans on earth.

Hi and I found a script at the below website but appears not to work for me. I'm using the Netbeans IDE and Java Version 6 and the link where I found how to use cookies in Java applets is at http://www.rgagnon.com/javadetails/java-0180.html
However my partial script below (snipped chunky code) seems to make the applet just report an error and not display at all and snipped is a gui as I use a easy drag and drop command method to get the gui which generates the code for me.

import java.io.*;
import java.net.URL;
import netscape.javascript.*;

public class chatroom extends extender {

    public String getCookies() {
      /*
      ** get all cookies for a document
      */
      try {
        JSObject myBrowser = (JSObject) JSObject.getWindow(this);
        JSObject myDocument =  (JSObject) myBrowser.getMember("document");
        String myCookie = (String)myDocument.getMember("cookie");
        if (myCookie.length() > 0)
           return myCookie;
        }
      catch (Exception e){
        e.printStackTrace();
        }
      return "?";
      }

     public String getCookie(String name) {
       /*
       ** get a specific cookie by its name, parse the cookie.
       **    not used in this Applet but can be useful
       */
       String myCookie = getCookies();
       String search = name + "=";
       if (myCookie.length() > 0) {
          int offset = myCookie.indexOf(search);
          if (offset != -1) {
             offset += search.length();
             int end = myCookie.indexOf(";", offset);
             if (end == -1) end = myCookie.length();
             return myCookie.substring(offset,end);
             }
          //else
            //System.out.println("Did not find cookie: "+name);
          }
        return "";
        }




//-----------------------------
// This section is snipped
//-----------------------------



public static void main(String[] args) { }
//do below on startup
    {
    Username.setText(getCookie("gm_team_developments"));
    } …

works how I want except it doesn't validate

value="<?php if(isset($_POST['name'])) echo $_POST['name'] ?>

this line is the problem and in particular the " after value=, it throws the same 3 errors that attempt 1 did.

I didn't spot that piece of php code. Should be as follows:

<label>Username</label><br />
<input name="name" type="text"  value="<?php echo (isset($_POST['name']))? $_POST['name']:''; ?>"/>
<?php echo (!empty($arrErrors['name']))? '<span class="errortext">'.$arrErrors['name'].'</span>':''; ?>
<br />

or

<label>Username</label><br />
<input name="name" type="text"  value="
<?php echo (isset($_POST['name']))? $_POST['name']:''; ?>
"/>
<?php echo (!empty($arrErrors['name']))? '<span class="errortext">'.$arrErrors['name'].'</span>':''; ?>
<br />

Try attempt 4 the following:

<label>Username</label><br />
<input name="name" type="text"  value="<?php if(isset($_POST['name'])) echo $_POST['name'] ?>"/>
<?php echo (!empty($arrErrors['name']))? '<span class="errortext">'.$arrErrors['name'].'</span>':''; ?>
<br />

Netbeans... It may be good for Java but I wouldn't recommend using Netbeans for php unless you find php terribly hard. Instead use a php text editor (Not IDE) and things will be a lot simpler as php has a great debugging system as it is.

I have followed the online tutorials for setting up your first php project using netbeans ide 6.5 mi. my project - NewPHPProject tree appears in the Projects window but i cant see the project's index.php file. What could be wrong?

NewPHPProject tree
|
source Files
|
NewPHPProject tree

That is the project tree that i see.

Lets take into account the following code.

<?php
$message="This is a string<br>";
echo $message;

$message="variable";
$variable="This is the second string";
echo $$message;
?>

You will notice with the second method it will check the variable $message for it's value and it's value is the string "variable". So then it searches for $variable and finds the final value which it yields.

1) mostly work, not much free time for much else thanks to taking an extra A-level
2) something arty, i do love photography - though i'm currently lacking a camera until christmas :P
3) Go iceskating whenever I can, or an icehockey session whenever there's one on
4) Coding, only really do C/C++ and Flash Actionscript 2, but you can see here. [link]
5) Be with friends
6) Read books and magazines

Age of empires is a great classic, still have it :) haven't played it since I was about 12 though.

Age of Empires 2 - That's one of my favorite games too. I don't think the Microsoft Zone is running though so unfortunately we can't vs each other in Age of Empires 2. :( That's a shame.

Maybe you're having trouble with the concept: slow it down until stops, apply enough force to change the orbit until it's closer to the Sun.
I haven't heard a single reason it can't be done.

And exactly how do you think someone will do that. Do you suggest sending a few missiles to mars to blow it out of it's orbit like the missile that tested water on the moon. It would take about 30 years to get the job done and not to mention the development of a large enough missile to blow mars out of its orbit. Then how do you expect to get mars back into its orbit... Impossible. Teleportation is the key when it is finally developed and powered by fusion power.

You need to connect to your MySql host first before making queries. Why not try:

mysql_query("root", "", "localhost");
$query="UPDATE ".$table." SET ".$sub_code."='".mysql_real_escape_string($dbc, $marks)."' WHERE no='".mysql_real_escape_string($dbc, $r_no)."' LIMIT 1";
mysql_query($dbc, $query) or die('error');

(The second argument of most MySQL functions is the connection variable which PHP adds or MySQL assumes by default if a connection has been made)

That won't work due to invalid syntax. The following would be more like it.

mysql_connect("localhost", "root", "password");
mysql_select_db('my_database');
$query="UPDATE ".$table." SET ".$sub_code."='".mysql_real_escape_string($marks)."' WHERE no='".mysql_real_escape_string($r_no)."' LIMIT 1";
mysql_query($query) or die(mysql_error());

Where do i set mysql server startup options in phpmyadmin.

I do not believe phpmyadmin has an option to startup or restart mysql and in fact will report an error if mysql is not started. The best way to startup mysql is via command line and can be scheduled with cron jobs.

Perhaps this:

$query="UPDATE ".$table." SET ".$sub_code."='".mysqli_real_escape_string($dbc, $marks)."' WHERE no='".mysqli_real_escape_string($dbc, $r_no)."' LIMIT 1";
mysqli_query($dbc, $query) or die('error');

I just swapped the functions and it's usage.

i am using xampp and it both mysql and mysqli works in it...i have been using mysqli for making my other php pages and it works perfect...

i have printed my query and its correct but still not getting processed..

Just that the mysqli_query() function is not in the official documentation. Also you could try the following code.

$query="UPDATE ".$table." SET ".$sub_code."='".mysql_real_escape_string($marks)."' WHERE no='".mysql_real_escape_string($r_no)."' LIMIT 1";
mysqli_query($dbc, $query) or die('error');

Also this:

$query="UPDATE ".$table." SET ".$sub_code."='".mysql_real_escape_string($marks)."' WHERE no='".mysql_real_escape_string($r_no)."' LIMIT 1";
mysqli_query($query, $dbc) or die('error');

Also is there such function as mysqli_query(). Is it meant to be mysql_query() like the following?

$query="UPDATE ".$table." SET ".$sub_code."='".mysql_real_escape_string($marks)."' WHERE r.no='".mysql_real_escape_string($r_no)."' LIMIT 1";
mysql_query($query) or die(mysql_error());

I want to create system tags Like wordpress for my site

A bit like my first post. If you are meaning you want to program your own php site from scratch to look like a wordpress site then you will have to realize that this is no easy job. You will find that it will be easier to start off with something smaller to learn then go for the big one. So unless you can create a blog with little effort I would recommend starting at making a comments box then a blog followed by a forum then from scratch the full suit.

Do you mean like this:

//data stored in $arr

for ($i=0;isset($arr[$i]);$i++) {
mysql_query('INSERT INTO `table` SET `column`="'.mysql_real_escape_string($arr[$i]).'"');
}

Hope it helps.

Everybody's reply to this thread should ultimately be "Replying to this thread".

Well I think the question is referring to just after your reply and after leaving the thread. But there is a limit to how many words you can fit in the title and that is where the confusion comes in.;)

Well right now I am replying to this thread but after that I will have a browse around daniweb then will check what supercomputers are selling cheap then I will be going to bed.

If you mean all of the values are stored in the one cell or variable then the following will do the trick:

$var='one.two.three.';
$var=substr($var,0,-1);
$arr=explode('.',$var);
for ($i=0;isset($arr[$i]);$i++) {
echo $arr[$i].'<br>';
}

That is just from the top of my head and may or may not have bugs. Hope it helps.