Compiling Immersaview Using CMake for Linux Using Curses CMake (ccmake)

 

Introduction

Before beginning using CMake, make sure that Coin3D is installed and that the QUANTA library named libquanta_32.a is available.  Additionally, make sure that the Coin3D libraries named libCoin.so and libsimage.so are also available.  More importantly, make sure that these libraries appear in the same directory.  Because CMake only specifies where libCoin.so resides, it also assumes that libsimage.sois also there.  As a result, it is best to make sure that all the contents of the simage/lib get copied or moved to Coin-2/lib.  If this is not done, none of the textures that are used by the model will appear...which will give a very strange appearance as opposed to what one would expect to see.  CMake is a program that creates make files, or instructions to your compiler, about where to find files when taking the source code of Immersaview and turning it into a usable executable.  Mac OS and Windows can run CMake as a GUI.  Unfortunately, at this time, it is not possible on Linux (as far as this author knows).

 

There are two parts to compiling Immersaview.  The first part involves creating a file named libQAvatar.a which is used to manage remote mouse pointers during a collaborative session.  The second part involves creating the immersaview and immersaviewserver executables.  This example is going to assume that the immersaview ZIP file was uncompressed in /usr/local/immersaview.  As a result, the "base" immersaview directory is /usr/local/immersaview/immersaview0.40.  Additionally, for this example, all supporting software like QUANTA are assumed to be located in /usr/local/immersaview/QUANTA-0.4.  Finally, it is assumed that CMake was installedthat it is available in your environment path such that you only have to type ccmake, and CMake will start properly.  The paths given here and throughout this document should change based on the locations where these and other appropriate files reside.  However, to give some frame of reference, the paths already described will serve as the example throughout this document.


 

Creating the Makefiles for libQAvatar.a

The first task that must be completed is specifying where the QAvatar source code and binaries will reside.  In order to use CMake to accomplish this task, it is going to be necessary to run CMake from the command prompt.  In general, to run CMake from the command line, it is necessary to change to the directory where the build will occur.  In this case, make a directory named /usr/local/immersaview/immersaview0.40/build-qavatar and move to that directory.  It is not sufficient to then just type the path to ccmake at the command line because it is necessary to give the relative (or absolute) path to the source directory used for this build.  For this part, the source directory named qavatar-src will be used and should be located in /usr/local/immersaview/immersaview0.40/qavatar-src.  To begin this process, type the following from build-qavatar:



ccmake ../qavatar-src


 

CMake appears with not much to see.  The first thing that should be done is to configure the initial CMake files by pressing the 'C' key.  This will fill the area with many fields with different names as seen below:


Each field listed here represents a directory or a filename that should be specified in order to have CMake create the proper makefile to generate libQAvatar.a.  There are CMake scripts that attempt to search and find these files and directories.  If they are successful, then everything will appear as you see above (but that does not mean that the scripts chose the correct locations).  Usually the first time that configuration occurs, all of the fields become marked with an asterisk '*' regardless of whether or not they are correct.  Typically, whenever there is incomplete, uncertain, or erroneous information for one of these fields, CMake marks the field with an asterisk.  If the information is correct, CMake will remove the asterisk.  Typically after configuring CMake for the first time, just about every field is marked with an asterisk unless CMake seemed to have found the appropriate file or directory.  Even though the asterisk would imply that the field must have some new information specified, it may not be necessary since not every field needs to be updated in order to be correct with reference to CMake.  As a result, the fields that must be changed will be directly specified in this document; otherwise, it would probably be best to leave the field as it is.  It is possible that additional fields may cause errors that may be related to one's local configuration.  For this reason, it is up to the user to determine and correct the source of these errors.  To change the information of a particular field, one needs to move the cursor to the field and press the Enterkey.  To delete the field completely, one can press the key combination Control-K.  Afterwards, one can type the information into the field or copy it into that location from another source.  When one is done entering this infomation, press the Enter key.


Now it is time to make the necessary changes to the following fields so that the correct information is given to generate the makefile:

 

 

QUANTA_INCLUDE_DIR: There is a directory named include that should reside inside the directory where QUANTA was downloaded.  For this example, this directory can be found in the following location: /usr/local/immersaview/QUANTA-0.4/install/include.

 
QUANTA_quanta_LIBRARY: The QUANTA library that must be found is named libquanta_32.a.  To help keep things organized, when the author compiled QUANTA from source, an install directory was made from the base QUANTA directory.  It is in the installdirectory that libquanta_32.a should exist.  If someone installed QUANTA to a different location, then this path would probably differ.  So, for this example, the absolute path to the library is: /usr/local/immersaview/QUANTA-0.4/install/lib/libquanta_32.a.

 

Once the information has been entered, it will be necessary to configure CMake again with this new information by pressing the 'C' key.  As long as the information in the specified fields is acceptable to CMake, any asterisks that may have appeared should now have gone away.  If an error does occur, CMake will place an asterisk to the left of the field's information.  In this case, one can either make the change to the erroneous field(s) or ignore the error(s).  If one desires to fix these problems, simply make the appropriate changes to the erroneous fields and configure CMake again by pressing the 'C' key again.  Repeat this process until the error stops occurring.  Once things are configured as one would like, press the 'G' key to generate the makefile.  This should make the CMake end and return the window to the command line. 

 



Using the Makefiles to Create libQAvatar.a

Since the directory that one currently resides in is where the Makefile was created, all that is needed to create libQAvatar.a is to type the following:


make libQAvatar.a

 
If all of the files and directories were specified correctly, the end result should involve libQAvatar.a being present in the directory named build-qavatar.  For this particular example, the location to this file is /usr/local/immersaview/immersaview0.40/build-qavatar/libQAvatar.a.  Remember the location of this file since it will be used in the next section.

 

 

 

Creating the Makefiles for immersaview and immersaviewserver

Now it is time to create the binaries named immersaview and immersaviewserver.  Again, to run CMake from the command line, it is necessary to change to the directory where the build will occur.  In this case, make a directory named /usr/local/immersaview/immersaview0.40/build-immersaview and move to that directory.  It is not sufficient to then just type the path to ccmake at the command line because it is necessary to give the relative (or absolute) path to the source directory used for this build.  For this part, the source directory named immersaview-src will be used and should be located in /usr/local/immersaview/immersaview0.40/immersaview-src.  To begin this process, type the following from build-immersaview:


ccmake ../immersaview-src


As before, CMake appears with not much to see.  The first thing that should be done is to configure the initial CMake files by pressing the 'C' key.  One thing that may happen is that the GLUT installation may not be found and an error will appear.  Simply press the 'E' key to exit this help section.  Then one will see the following:




Recalling the possible GLUT directory error, it seems that there is no field for specifying anything related to GLUT.  For this reason, it is necessary to view the more advanced options by pressing the 'T' key.  Many more fields appear below:




 There are now multiple "pages" of fields that can be specified that can be navigated by pressing the Page Up and Page Down keys.  One should also notice that almost every field has an sterisk indicating that changes may need to be made in order for CMake to generate the makefiles.  However, keep in mind that it is only necessary to change the relevant fields and leave the other fields alone.   Additionally, one can simply ignore erroneous fields as irrelevant. If it is uncertain where directories might reside, it is recommended to take the "advice" of CMake when it gives hints as to what specific header file would reside in a given directory.  With this in mind, do a file search if all else fails and use the file with the most recent date.  The following fields should be changed:


 

GLUT_INCLUDE_DIR: Only change this information if you received an error from CMake.  According to CMake, it is necessary to find the directory that contains glut.h.  Since this is something that may not be well known, it may be best to search for glut.h.  A directory that would probably contain glut.h is /usr/include.

 

INVENTOR_INCLUDE_DIR: Given the assumption mentioned in the beginning of this document, Coin3D files and directories reside in /usr/local/immersaview/Coin3D.  For this example, the path to the include directory is the following: /usr/local/immersaview/Coin3D/install/Coin-2/include.

 

INVENTOR_oiv_LIBRARY: Based on the base directory of Coin3D listed for the previous field, the library named libCoin.so should be found in a similar location.  For this example, the path to this file is: /usr/local/immersaview/Coin3D/install/Coin-2/lib/libCoin.so.

 

QAvatar_INCLUDE_DIR: Just reuse the source directory that was used to specify the location of qavatar-src.  For this example, this directory can be found in the following location: /usr/local/immersaview/immersaview0.40/qavatar-src.

 

QAvatar_LIBRARY: This is where that request to remember where libQAvatar.a comes in.  This library is going to be located in build-qavatar.  For this example, this library can be found in the following location: /usr/local/immersaview/immersaview0.40/build-qavatar/libQAvatar.a.

 

QUANTA_INCLUDE_DIR: Use the same directory that was used when building libquanta_32.a.  For this example, this directory can be found in the following location: /usr/local/immersaview/QUANTA-0.4/install/include.


QUANTA_quanta_LIBRARY: Use the same directory that was used when building libquanta_32.a. For this example, the absolute path to the library is: /usr/local/immersaview/QUANTA-0.4/install/lib/libquanta_32.a.

 

Once the information has been entered, configure CMake by pressing the 'C' key again.  As long as the information in the specified fields is acceptable to CMake, all of the fields should not have any asterisks near them.  If an error does occur, CMake will put an asterisk by the problematic field.  In this case, one can either make the change to the erroneous field(s) or ignore the error(s).  If one desires to fix these problems, simply make the appropriate changes to the erroneous fields and configure CMake again by pressing the 'C' key.  Repeat this process until the error stops occurring.

 

Once things are configured as one would like, have CMake generate the appropriate makefiles by pressing the 'G' key.  This should make the CMake disappear and allow the command line to return to the window.

 

 

 

Using the Makefiles to Create immersaviewand immersaviewserver

Since the directory that one currently resides in is where the Makefile was created, all that is needed to create immersaview is to type the following:


make immersaview

 
Similarly, to create immersaviewserver, just type the following:


make immersaviewserver


Both of these executables should now reside in build-immersaview.

 

 

Filling the bin Directory

The pieces are now in place to get things running.  Now, it is just necessary to run one more script that will take care of the remaining things to setup and cleanup.  The name of the script to run is called setup, but at this time, setup does not do anything because it needs to have executable permissions.  As a result, type the following at the command line from /immersaview/immersaview0.40:


chmod 755 setup


Run the script by typing:


./setup


Now, things should be ready to go.

 

 

If there are any questions or feedback on this document, please send mail to cavern@evl.uic.edu.  This document was last revised in August 2004.