STLA_IO
Read and Write Routines
STL ASCII 3D Graphics Files

STLA_IO is a C++ library which reads and writes the 3D graphics information stored in an ASCII STL (stereolithography) file.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

STLA_IO is available in a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

IVCON, a C++ program which can convert graphics information between STLA and other formats.

IVREAD, a FORTRAN90 program which can convert graphics information between STLA and other formats.

STLA, a data directory which contains some examples of STLA files.

STLA_DISPLAY, a MATLAB program which can read an STLA file and display it on the screen.

Reference:

1. 3D Systems, Inc,
   Stereolithography Interface Specification,
   October 1989.

Source Code:

• stla_io.cpp, the source code.
• stla_io.hpp, the include file.

Examples and Tests:

• stla_io_test.cpp, a sample calling program.
• cube.stla, a simple STLA file that describes a cube.
• cube_new.stla, an STLA file describing a cube, written by STLA_WRITE.
• stla_io_test.txt, the output file.

List of Routines:

• CH_CAP capitalizes a single character.
• CH_EQI is true if two characters are equal, disregarding case.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• I4_MIN returns the smaller of two integers.
• R8_MAX returns the maximum of two R8's.
• R8_MIN returns the minimum of two R8's.
• R8VEC_CROSS_3D computes the cross product of two R8VEC's in 3D.
• R8VEC_DOT computes the dot product of two R8VEC's.
• R8VEC_LENGTH returns the Euclidean length of the vector X
• S_CAT concatenates two strings to make a third string.
• S_EQI reports whether two strings are equal, ignoring case.
• S_LEN_TRIM returns the length of a string to the last nonblank.
• S_TO_R8 reads an R8 from a string.
• STLA_CHECK checks an ASCII StereoLithography file.
• STLA_FACE_NODE_PRINT prints the node indices for each face.
• STLA_FACE_NORMAL_COMPUTE computes normal vectors for an ASCII StereoLithography file.
• STLA_FACE_NORMAL_PRINT prints the normal vectors.
• STLA_NODE_XYZ_PRINT prints the node coordinates.
• STLA_OFFSET_GET gets the STLA offset.
• STLA_OFFSET_SET sets the STLA offset.
• STLA_READ reads graphics information from an ASCII StereoLithography file.
• STLA_SIZE determines sizes associated with an STLA file.
• STLA_SIZE_PRINT prints sizes associated with an STLA file.
• STLA_WRITE writes an ASCII STL (stereolithography) file.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• WORD_NEXT_READ "reads" words from a string, one at a time.

You can go up one level to the C++ source codes.