Changes between Version 3 and Version 4 of FAQ


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Timestamp:
Feb 8, 2006 7:48:04 PM (10 years ago)
Author:
leo
Comment:

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  • FAQ

    v3 v4  
    11== General Questions ==
    22
    3 1. The array command doesn't do anything, what's going on?
     3'''1. The array command doesn't do anything, what's going on?'''
    44
    55You must set the total number of bricks in the array to a value greater than 1.
    66
    77
    8 2. How can I set the default options for a new project?
     8'''2. How can I set the default options for a new project?'''
    99
    1010Go to the preferences dialog, set the options you want and press the 'Make Default' button. LeoCAD will save those options and use them next time you start a new project.
    1111
    1212
    13 3. I can't seem to align two bricks correctly, they are always away from each other.
     13'''3. I can't seem to align two bricks correctly, they are always away from each other.'''
    1414
    1515Most of the times when this happens it's because the bricks are not where you think they are, they are actually far away and because of the perspective distortion you think they are near each other. Take a look at the picture and compare the Top and Side views with the Main view.
     
    1717
    1818
    19 4. How can I export a model to use with LDraw?
     19'''4. How can I export a model to use with LDraw?'''
    2020
    2121Just choose the "Save As" option from the "File" menu and enter a file name with the .dat or .ldr extension.
    2222
    2323
    24 5. Do you plan to port the program to another platform?
     24'''5. Do you plan to port the program to another platform?'''
    2525
    2626Not at the moment, I would like to write a Machintosh version but I don't have a Mac. If you're a programmer and you want to try to do it yourself, join the developers mailing list.
     
    2929== Windows Questions ==
    3030
    31 1. The print/print preview freezes my computer and the HD goes crazy.
     31'''1. The print/print preview freezes my computer and the HD goes crazy.'''
    3232
    3333The computer is not frozen, as Windows 95 can't print an OpenGL image directly, LeoCAD creates a bitmap in memory and then prints that bitmap. If you are using a high resolution printer, that operation will take a lot of RAM memory. Here's an example, suppose that you want to print something with a 600 DPI printer on a sheet of paper A4, the bitmap would be 8.27 inches x 600 DPI x 11.69 inches x 600 DPI x 3 bytes (24 bits) = 100 MB just for the bitmap.
     
    3535
    3636
    37 2. LeoCAD used to work fine but now it crashes on startup and I can't live without it!
     37'''2. LeoCAD used to work fine but now it crashes on startup and I can't live without it!'''
    3838
    3939Try running "regedit.exe" and delete the folder "HKEY_CURRENT_USER\Software\BT Software" and it will work again.
    4040
    4141
    42 3. I try to run the program but I get a crash on startup.
     42'''3. I try to run the program but I get a crash on startup.'''
    4343
    4444Most regular PC video cards are tested mainly with games and LeoCAD uses the hardware more like a CAD program so a lot of times it ends up finding bugs on their drivers. The first thing to try is go to your manufacturers website and download and install the latest drivers available for your video card.
     
    5151== Linux Questions ==
    5252 
    53 1. Where can I find libGL.so?
     53'''1. Where can I find libGL.so?'''
    5454
    5555If you don't have any OpenGL libraries installed you can use Mesa 3D, make sure that you add the directory where you installed it to your /etc/ld.so.conf file and run ldconfig or have it in your LD_LIBRARY_PATH environment variable.
    5656
    5757
    58 2. What does "_mesa_unpack_ubyte_color_span: Assertion `dstComponents > 0' failed." mean?
     58'''2. I get the error "_mesa_unpack_ubyte_color_span: Assertion `dstComponents > 0' failed." when I try to run LeoCAD.'''
    5959
    6060This is a problem caused by old versions of the Mesa 3D library (the version that comes with !RedHat 6.2 for example). Go to the Mesa Homepage, download and install a newer version.
    6161
    6262
    63 3. The program crashes every time I try to save a picture.
     63'''3. LeoCAD crashes every time I try to save a picture.'''
    6464
    6565This is a bug in the nVidia X11 drivers, I've contacted them but they haven't fixed it yet. If you have Mesa 3D installed you can run LeoCAD with "leocad --libgl /path/to/libMesaGL.so" to save pictures.