www.fractalposter.nl

The full explanation of the program.


Nederlandse site.
3 colour gradients to choose from. Each with it's own little gradient above it. colour line or textual info. Colour gradient with a row of buttons beneath. Preview window. Here you compose your own poster with your mouse. Detail window. Or the place where you see some textual info about the preview window. Basical information describing your current preview window. Manipulation of the colours. How do you spread the gradient on your poster? Your choice for your poster. How large and on what material. Also saving and ordering. Buttons to the web pages on www.fractalposter.nl. Choose your language, open or close the explanation or quit the program.

This is the main screen of the program itself. Click on any part of this image to jump to the explanation of that part.



Choosing your colours.

Quite a large piece of the window is used for these colour blocks. It makes it possible to have a good view on the possible colours and choose them with a minimum of mouseclicks.
But before you choose a colour, make sure the right spot on the gradient is marked as the 'hotspot'. You can see that as the red edge around the button below the gradient.
Each large block represents one basic colour. From left to right that is red, green and blue. Above each block you can see a small gradient in which you choose the amount of that basic colour by left clicking on it. All the pixels in that block will have the same quantity of that basic colour.
In the block itself you will then see all the possible combinations of that chosen value with the other two basical colours. So you can choose any possible colour with only 2 mouseclicks.
If you are on this piece of the window with your mouse, you will see the colourvalues of the pixel beneath your mouse directly below these blocks. And also a long rectangle of that colour.

The colour beneath your mouse (or other information).

Directly below the big colour blocks you can see a colour band like this one if you are on the part of the window which is ment to choose a colour from. That is, when you are somewhere on the colour gradients with your mouse.
If you are on another part of the window, you can see some other textual information which depends upon the place and or action of that moment. It could for instance be the coordinates of your mouse within the fractal or a line which tells that the program has saved a picture or colour gradient for you.

The colour gradient as it will be used for your poster.

This gradient holds all the colours which will be used for your fractal On the screen it is approximately 800 pixels wide. But for the posters many more colour values within this gradient will be used.
Below the gradient you see 132 little buttons. One of them is the 'hotspot', marked with a red rectangle, which is the place in the gradient which will get the new colour if you choose a colour with your mouse. You can make each of these buttons the 'hotspot' by leftclicking on the button. (You might also choose a colour by leftclicking in this gradient itself). So, whenever you choose a colour, it is placed in this gradient just above the 'hotspot', and also in the preview window and in the detail window (if that window is active).
The button itself will turn green, as a token that that location in the gradient is filled with a colour. You can remove a colour from the gradient by leftclicking on a green button if that button is the hotspot.
Directly above the row with buttons you can see a yellow and a light blue intermittent line. The lightblue line is an indication which colours of the gradient are used to create the preview window. The yellow line is an indication which colours of the gradient are used for building the detail window. This yellow line will disappear when the detail window is not active.
You can save this gradient by rightclicking on it. The program itself shall give it a name and save it in the folder 'gradients', which is located in the folder 'mandelbrot' which is in the same folder as the program itself. Directly above this gradient, on the place where most of the time the colour band is shown, this name and location will be written.

The preview window.

This is what it's all about. Here you choose which part of the fractal you want to use to compose your poster with.
The red rectangle is the part of the preview window which will be used for your poster. Therefore the proportion of that rectangle depends upon the poster you choose.
If you move your mouse across this window you see 4 little hooks and a rectangle moving with your mouse.
The four hooks determine the part of the preview window which will be your next preview window when you rightclick on this window. The size of the next preview window can be chosen by rolling your mousewheel, by pressing the up and down arrow keys on your keyboard or by directly typing in a zoom percentage in the 'Mandelbrot basics' section of the program in the top-right corner of the main program window.
While the program is calculating the new preview window, you see two large buttons just to the left of this preview window.
The topmost button says 'undo update preview window' By clicking on this button you go back to the preview window as it was before you clicked on it.
The other button says 'Stop update preview window' By clicking on this window you stop the calculation, but the program behaves as if that calculation was finished. This makes it possible to zoom in or out very fast.
The little rectangle is the part which you can show in the detail window. This part is an exact piece of the poster you are making. The size of this rectangle is determined by the size of your poster. The bigger the poster, the smaller this rectangle will be. That's because the pixel size of this detail is fixed and the pixelsize of the poster depends upon your choice for your poster. By leftclicking in the preview window the detail will be shown just at the left of the preview window, in the detail window. While this detail window is calculated you see a big button in the preview window with the text 'stop update detail window' By clicking on this button, the calculation of the detail will stop, but the piece which is already calculated will remain on the screen. This can be very handy because it makes it possible to divide the detail window in different pieces next to each other and in such a way you can see how all of those details are influenced by choosing new colours by changing the gradient.

The detail window.

An example of the detail window. This window is created and updated by leftclicking on the preview window.
It disappears again if you change the preview window itself. Than you will see the textual information again which you saw when you started the program. It shows the parameters of the preview window. This is the same info as you can see in the right section of the program.

The basic information of your fractal.

In this 'Mandelbrot basics' section of the program you see the values of the different parameters as they are used to calculate your poster.
The topmost value, 'width' is the total absolute width of the preview window.
'horiz.' and 'vert.' are the absolute coordinates of the middle point of the preview window.
You can type in these three values here by hand. But usually you choose these values by right clicking in the preview window itself.
Then you get 4 values which you can only choose here:
'y/x proportion' gives the proportion between the horizontal difference between 2 pixels and the vertical difference between 2 pixels. Mostly this will be equal, so then it is 1.
'iterations to bail-out' gives the maximum quantity of calculations which the program will perform on each pixel. If the calculated value for that pixel rises above the value given in 'bail-out radius' before this quantity of calculations is made, that pixel is a part of the fractal and that value will be used to choose a colour in the gradient. If the value of the calculation for that pixel stays below that value, that pixel is not a part of the fractal and that pixel will be coloured with the colour which is chosen as the colour for the center of the fractal. The higher you choose this value, the more detail you get in your poster, but also the longer it takes to calculate your poster.
'bail-out radius' is the value which determines whether a point is seen as part of the fractal or not. For the well-known Mandelbrot, this value is 2.
'multiplication factor' is another factor used in the calculation, which has a great influence on the shapes of the fractal. For the normal Mandelbrot, this is also 2.
With the button 'okay' you refresh the preview window, using the new values chosen in these fields.
With 'save' your preview window as you see it on your screen, together with a textfile with the underlying data for this preview window, will be saved on your disk in the folder 'data'. The names of both of these files will be shown just above the colour gradient.
'Load' makes it possible to reuse an earlier saved preview window. It will open a dialog box in which you choose the previously saved preview window as a jpg file. But it only uses the associated textfile. If that textfile is missing, the program can't reuse that preview image and you will get an error message on your screen.
'zoom xxxx %' is the relative size of the zoombox (= the part of the preview window between the four hooks.) in relation to the preview window itself. You can choose this value here, but also by rolling your mousewheel in the preview window or by pressing the up and down arrows on your keyboard.
'show whole' is the button which let's you zoom out to the whole of the fractal in your preview weindow. This makes it easy to start zooming in on another part of the fractal.

This is where you spread out the colours in the poster.

The calculation of the fractal only produces a heap of numbers. Here is the place where you determine how this heap of numbers is translated to a colour from the gradient.
'colours : shift' is a value which will be added to the calculated value. This makes it possible to shift all of the calculated value with the same quantity.
'multiply' is a value with which the outcome of the calculation is multiplied. This makes it possible to spread out the values more or less (or use the gradient more than once, because it is a looping system).
By clicking on the button 'use whole gradient' these two above mentioned values will be chosen automatically so that the whole of the gradient is used to create the current preview window.
'power' is the power to which the values of the calculation will be raised. This makes it possible to choose whether the gradient will be used linear or logarithmic or anything in between.
'choose colour center' opens a dialog window in which you can choose which colour will be used for the pixels in the windows which are not a part of the fractal. This colour is also shown as a rectangle next to the button (in this example it is black).
'load colour gradient' opens a dialog window which shows all the bmp files in the folder 'gradients', which is the default location where you might have stored your previous gradients. You can choose any of them to reuse it.

Which poster do you want?

How large do you want your poster to be and on which material you want it to be printed? That is what you can choose here. In this example is chosen for a cloth on a wooden frame of 200 x 100 cm. with a thickness of 45 mm.
Directly below that you choose which size of the preview window is seen as the bottom side of your poster. You have 4 choices here.
'save detail'By clicking on this button you save the detail window which you see now on your screen. It will be saved in the folder 'details' with the name xxxxx_y.bmp. In this name 'xxxxx' is the lowest number which is not yet used in this folder and 'y' is the number for this detail. If it is the first detail you save from the current preview window then also the associated textfile with the underlying data will be saved in the same folder as xxxxx_data.txt and the preview window as xxxxx_0.bmp. From each preview window, you can save up to 9 details.
'choose poster' opens a screen in which you choose how large you want your poster to be and on which material you want it to be printed. But you can also choose a certain size in pixels if you just want to create a digital image. The program shall, directly after opening this dialogbox, attempt to get the latest list from our website. If this succeeds, you see the text 'list new' added to the title window. If this doesn't succeed, you will see the text 'list old' added in the window title. In such a case, the list you see may not be completely accurate. In all cases the list and prices as mentioned on this page will be the valid values.
'save poster' makes it possible for you to calculate your own poster. But only posters up to full screensize (1920 x 1920 pixels) will be completely calculated. Bigger posters will contain black lines across the image. This is the limitation of this poster ordering program. But also the posters with black lines in them will give you a good impression of how your ordered poster will look like.
Your poster will be stored as a bmp file in the folder 'posters'. The associated textfile will also be stored in that same folder, using the same name with extension txt. So you can, at any later moment, reload your poster in the program with the button 'load' in the 'Mandelbrot basics' section of the program.
During the calculation of the poster you see in the line above the gradient what the name of your new poster is and how long it will take to complete your poster.
You also see two large buttons on top of the large colourblock in the middle (the green one).
The topmost button says 'cancel creating the rest of the bitmap.' By clicking on this button the program stops calculating the poster immediatly. But the part which was already calculated will be kept on your harddisk. It now is simply a smaller image. You can see how large it is in the line just above the gradient.
The other buttons says 'shut down the computer when this poster is finished' By clicking on this button you instruct the program to shut down the computer directly after this poster has been completed. If you have clicked on that button you will see another, even bigger, button with the text 'This computer shall shut down when this poster is finished. Click here to cancel this instruction.' In such a case you should make sure that there are no other programs active anymore which need the attention of the user before they can be shut down. They might prevent the computer from being shut down.
By clicking on this large button you cancel this instruction and you go back to the situation as it was just before you clicked the shut down button.
'order poster' is the button with which you can order your self designed poster as a large print. If you click on that button, three things happens at the same time.
1. The explanation window is opened (or only filled, if it was already open) which describes the procedure to order a poster.
2. The program creates an email in which it writes all the basical information which is needed to create your poster. You have to add your own name in it and you can also add some other comments and/or question in it, if you want to. In the case you order a canvas poster, you have to decide whether you want the image to stream over the edge or notand if it doesn't, which colour you want for the sides. The default is white sides, colour 255,255,255.
3. The internet page on which you can arrange for the payment of the poster will be opened in your browser. Only the payment will make the order definitive.

Buttons on the relevant pages on www.fractalposter.nl.

These 6 buttons are each a direct link to the relevant pages on the website.

Language, explanation and quitting the program.

In the dropdown box 'language' you can choose which language you want to use for the program. English and Dutch are always available. But the program looks in the folder 'language' for textfiles. Any textfile it can find there will be interpreted as a language file and will be shown as a choice in the drop down box. However, such language files are not yet available. If you want to translate the program and make that translation available for others, just let us know, so we can provide you with the instructions on how to do that efficiently.
'mouse e.' is a button with which you can open a little explanation window in which a short description of the mouseclicks in the program is given. If you open that window, the text on this button will change in 'c. mouse' , so now you can close that window with this button.
'program explanation' opens an explanation window in which a general explanation is given of the program. You can close that window by clicking on the same button, which then says 'close explanation'.
To the gallery's:
1 2 3 4 5 6 7 8 9
Hans van der Hoeven
Liesbospark 28
4813 HV Breda
The Netherlands
email: info@fractalposter.nl
fractal posters:
www.fractalposter.nl
fractal films:
www.Mandelbrot.nl
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