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Log Volume Calculator Library

Need to calculate Scribner or Cubic volumes in your own code? Our Log Volume Library makes it easy. The library comes as a set of 32-bit Windows DLLs that target three different programming environments: C-style, C++, and VB/VBA.

Test output from this library is available for your inspection (volcharts.zip - 300K). These charts show outputs, in standard text format, from actual test runs using a variety of tapers and options.

Cubic Volumes are calculated using the following formulae:

Scribner Volumes are calculated using a table-driven approach. First the log is segmented according to FS16 or FS20 rules into one to three segments depending on the length, and the total taper of the log is distributed evenly across the segments. Then the volume of each segment is calculated from tables of Scribner Factors that are based on diameters and the length. Factors for diameters between 6" and 11" are based on log lengths. Input dimensions are in inches and feet..

Using these library DLLs has been made as easy as possible:

• For C programming, the basic procedure (for Visual C++) is to copy the header and .lib file to your project directory, #include the header file in the source file where you intend to call the library routines, then call the volume routines as desired. Put the DLL itself in the same directory as your executable or in the Path. C-Style detail/sample
• For C++ programming, #include the header file in the source file where you intend to call the library routines, instantiate an instance of the class and set Exception and Scaling Rule options as desired, then call the volume methods as desired. Put the DLL itself in the same directory as your executable or in the Path. C++ Style detail/sample
• For VB/VBA programming, set a Reference to the LogCalc type library from the VB/VBA Tools menu, then create an object in the procedure or function where you will be calling, then call the volume routines as desired. VB/VBA detail/sample

Site License: $100.00 -- For more information, or to order: Contact me:
Note: a Developers License (royalties) is required if you intend to distribute your program with any of these DLLs to third parties.

Disclaimer and Warranty:
These DLLs are the result of many years of refinement and testing by professional foresters and biometricians, and every effort has been made to insure their accuracy. We cannot, however, warrant their suitability for your application - you must review the test output (volcharts.zip) and satisfy yourself that they are proper for your use. Since this is a low-profit product, we are unable to provide extensive support. We will work with you as much as possible, but our maximum liability is limited to a refund of your purchase price.

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