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Don't repost the same question. I already told you why this won't work in your other thread.
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FRACTAL FORMULA HELP REQUESTED
Hey folks!
I am hoping to experiment with some simple fractal formulas in VB. I have some running ok, but some
I seem to be having trouble with. I am using VB 4.0, and am hoping someone out there in cybertopia
might be able to share insights or code snippets? I don't need anything fancy like complex graphic
rendering of the fractals, although if you are excited about this stuff and feel ambitious I'm happy to
check out any graphic stuff you might want to share.
Simply, all I'm looking for is simple number in and number out routines, i.e. you stick a number(s)
into the formula, set the iteration ceiling and then watch what ever numbers get pumped out, thats it really.
So we might have say two text boxes for inputs,
textbox1 = any number value, i.e. 129
textbox2 = any number value, i.e. 234
Then we feed those values into the fractals formula loop and for every interation the newly generated
values get dumped to some other textbox.
=================
Barry Martin - Hopalong
This one is probably one of the most interesting ones, it seems Barry Martin released a really old dos version called hopalong
and there are various exe takes on this floating about, but most of them don't work anymore because they are so old.
I had trouble with this one because I don't really understand the "sign" function, and the VB 4 sign function doesn't seem
to work in a way thats compatible with the formula, but then I'm just as likely ignorant of how to properly apply it.
2 plots resemble organic structures like cells
xnew=y-sqrt (abs(b*x-c))sign(x)
ynew = a-x
different values for constants a,b,c give different patterns and periodicities
========
For the Lorentz function, I'd like to get a really simple rudimentary one working, but I'm also curious about what would happen
if we had two parallel Lorentz functions working together, one accepting outputs from the other and then feeding back into the first one,
i.e.
Lorentz function (1) outputs cycle iteration values to Lorentz (2)
And then Lorentz(2) inputs to Lorent(1) and so on.....
By the way, does anyone know if a single Lorentz function can operate on more than the default # of inputs
Lorentz Function
xnew = x+d*a*(y-x)
ynew = y+d*(x*(c-2)-y)
znew = z+d*(x*y-b*z)
where a,b,c,d are contants, i.e. values of 10,8/3,28,0.003
========
I tried coding this one also, but instead of getting a rich set of chaotic values all I got were two values
that repeated exactly the same over and over again????
Mandlebrot
z ; iterate via ; z^2 + c
==========
For this one I tried implementing this but for some reason, when I coded this to VB, it only generated
the same values over and over again.... no chaotically generated values......
(folds and remaps oval onto itself
)
Michael Henons;
Germaine to stellar orbits
xnew = y + 1 - 1.4 * x^2
ynew = 0.3 * x
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Step One: Upgrade your version of Visual Basic. Visual Basic 2005 Express edition is free and accessible, vb 4 is seriously outdated, insufficient and unsupported for anything. VB.net 2005 is much more effective for any application, it is now much more than a glue and paddlepop sticks microsoft response to a more "understandable" interface and has become nearly, if not as, powerful as C.
http://msdn2.microsoft.com/en-us/express/aa718406.aspx
Step Two: Try the maths forum, right here on Code Project.
Any thing mathematical, those guys can help. Oh and try to make your question abit more concise.
http://www.codeproject.com/script/comments/forums.asp?forumid=326859
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Cedrickdeorange wrote: how do i get the datafile to display on the mouseover part.
What "mouseover part"?? Part of what??
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Yeah, it's called a "menu item". You open your text file, then create items in your File menu from that. There is nothing to do with a "mouseover" event. What's the problem??
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I'm 51 and a total begginer. So things like this take time to stick.
So there is a small problem
But thanks
Regards
Zeldacat
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Cedrickdeorange wrote: So there is a small problem
That's what I'm trying to find out. What's the problem?
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when the mouse hovers on the recent files menuitem, as you know you get a submenu with the list of recent files. how do i get the list to read into the recent files submenu from the text file.
sorry to be a pain in the rump.
Regards
Zeldacat
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Create a menu item under your File menu with a name of, say, RecentFilesMenu and some appropriate Text.
Here's an example of adding submenu items to a menu:
RecentFilesMenu.DropDownItems.Clear()
For x As Integer = 1 to 5
Dim filename As String = String.Format("Filename{0}.txt", x)
Dim newItem As New ToolStripMenuItem(String.Format("&{0} {1}", x, filename), Nothing, AddressOf RecentFile_Click)
newItem.Tag = filename
RecentFilesMenu.DropDownItems.Add(newItem)
Next
You'll, of course, need a method to handle the clicking of those menu items, so....
Private Sub RecentFile_Click(ByVal sender As Object, ByVal e As System.EventArgs)
If TypeOf sender Is ToolStripMenuItem Then
Dim menuItem As ToolStripMenuItem = DirectCast(sender, ToolStripMenuItem)
Dim filename As String = DirectCast(menuItem.Tag, String)
' Call your Load Document code here...
End If
End Sub
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When the program begins you should create menu items and append them to the appropriate menu from the data in the data file.
Regards,
Thomas Stockwell
Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.
Visit my homepage Oracle Studios[ ^]
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Can I include code that's in a textfile at runtime in vb.net? I'd like to allow the user to modify the code before the run. Seems like an easy way to do that is to allow them to edit a textfile which becomes part of the code while executing.
Thanks
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I would assume that the basic .NET runtime does not include a compiler.
Christian Graus - Microsoft MVP - C++
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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No, you can't include code into an assembly that has been compiled already. You can compile the code into a separate assembly and then load that assembly and use classes from it.
Have a look at the Microsoft.VisualBasic.VBCodeProvider class.
---
single minded; short sighted; long gone;
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hello i am new in vb.net and i have just started to read about link label chapter and this is the only exercise in that chapter
and when i click button it's not showing any web page but it's shows nice error that application not found
and error is
An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in system.dll
Additional information: Application not found
Public Class frmLinkLabel<br />
Inherits System.Windows.Forms.Form<br />
<br />
#Region " Windows Form Designer generated code "<br />
<br />
Public Sub New()<br />
MyBase.New()<br />
<br />
'This call is required by the Windows Form Designer.<br />
InitializeComponent()<br />
<br />
'Add any initialization after the InitializeComponent() call<br />
<br />
End Sub<br />
<br />
'Form overrides dispose to clean up the component list.<br />
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)<br />
If disposing Then<br />
If Not (components Is Nothing) Then<br />
components.Dispose()<br />
End If<br />
End If<br />
MyBase.Dispose(disposing)<br />
End Sub<br />
<br />
'Required by the Windows Form Designer<br />
Private components As System.ComponentModel.IContainer<br />
<br />
'NOTE: The following procedure is required by the Windows Form Designer<br />
'It can be modified using the Windows Form Designer. <br />
'Do not modify it using the code editor.<br />
Friend WithEvents btnVisit As System.Windows.Forms.Button<br />
Friend WithEvents lklURL As System.Windows.Forms.LinkLabel<br />
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()<br />
Me.btnVisit = New System.Windows.Forms.Button<br />
Me.lklURL = New System.Windows.Forms.LinkLabel<br />
Me.SuspendLayout()<br />
'<br />
'btnVisit<br />
'<br />
Me.btnVisit.Location = New System.Drawing.Point(56, 88)<br />
Me.btnVisit.Name = "btnVisit"<br />
Me.btnVisit.Size = New System.Drawing.Size(184, 23)<br />
Me.btnVisit.TabIndex = 0<br />
Me.btnVisit.Text = "Visit Our Web Site"<br />
'<br />
'lklURL<br />
'<br />
Me.lklURL.Location = New System.Drawing.Point(24, 176)<br />
Me.lklURL.Name = "lklURL"<br />
Me.lklURL.Size = New System.Drawing.Size(248, 23)<br />
Me.lklURL.TabIndex = 1<br />
Me.lklURL.TabStop = True<br />
Me.lklURL.Text = "http://www.kidwaresoftware.com"<br />
Me.lklURL.TextAlign = System.Drawing.ContentAlignment.MiddleCenter<br />
'<br />
'frmLinkLabel<br />
'<br />
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)<br />
Me.ClientSize = New System.Drawing.Size(292, 273)<br />
Me.Controls.Add(Me.lklURL)<br />
Me.Controls.Add(Me.btnVisit)<br />
Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle<br />
Me.Name = "frmLinkLabel"<br />
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen<br />
Me.Text = "Link Label Example"<br />
Me.ResumeLayout(False)<br />
<br />
End Sub<br />
<br />
#End Region<br />
<br />
Private Sub btnVisit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnVisit.Click<br />
'call the process.start method to open the default browser<br />
'wit a URL<br />
lklURL.LinkVisited = True<br />
Diagnostics.Process.Start(lklURL.Text)<br />
End Sub<br />
End Class
any help for this 
waiting for your kind rep.
thanks
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replace this line
Diagnostics.Process.Start(lklURL.Text)
with
Diagnostics.Process.Start("explorer.exe " & lklURL.Text)
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first of thank you very much
but still it's not working it's shows error
and error is
An unhandled exception of type 'System.ComponentModel.Win32Exception' occurred in system.dll
Additional information: The system cannot find the file specified
waiting for your kind rep
have a nice time
thanks
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I am building a control, within this control is a data grid...The data grid needs to be changed depending on the form that it is on...but when you build a control and then drag it onto a form...you can no longer edit the controls that you placed on that control...any sugestions?
--
"Keyboard not found. Press < F1 > to RESUME. "
Source unknown (appears in many common BIOSes as a real error message)
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Polymorpher wrote: The data grid needs to be changed depending on the form that it is on
The control shouldn't care about what form it's on. It should be modified by the form code only if necessary.
Polymorpher wrote: you can no longer edit the controls that you placed on that control
What does this mean? How do you want to "edit the controls"??
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My control contains a grid control as well as some other controls, when I drag my control onto a form from the toolbox, I want to be able to move the grid within my control and change some of the settings on the grid etc.
--
"Keyboard not found. Press < F1 > to RESUME. "
Source unknown (appears in many common BIOSes as a real error message)
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You're going to have to add code to your control to handle dragging the grid around at design time. The designer won't do it for you because it doesn't support designing constituent controls seperate from the user control that contains them, at the controls runtime.
The properties will all have to be re-exposed as public properties of the user control.
A user control's runtime doesn't begin when the forms project the control is used in is finally run. A User Control's runtime begins when an instance of the control is created on the host form.
From your description, it sounds like it would be better to just break the datagridview out on its own and not have it as a constituent of a user control.
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Hey all!
Got something i need help on.
How can i make a panel's vertical scroll bar to act and control another particular datagrid or another component for that matter.
So when the vertical scroll is moved, both the panel and the other form(eg; datagrid) should be scrolled as well.
Thx in advance!
regards,
Jensen
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You can checkout the response to an article here[^] that describes an alternate method to the articles method.
Either will work...
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Thx dave!
you've helped me one time too many! ur the best.
Regards,
Jensen
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