BEZIER_SURFACE
Routines for Bezier Surface Information

BEZIER_SURFACE is a FORTRAN90 library, using double precision arithmetic, which can read, write, print, and otherwise manipulate the data that defines a Bezier surface.

Related Data and Programs:

BEZIER_SURFACE is also available in a MATLAB version.

BEZIER_SURFACE is a data directory which contains a description and examples of the Bezier Surface file format.

BEZIER_SURFACE_DISPLAY is a MATLAB program which reads a pair of Bezier Surface data files and display the surface.

TABLE is the format which is used for both the node and rectangle files.

Reference:

1. Edward Angel,
   Interactive Computer Graphics, a Top-Down Approach with OpenGL,
   Addison-Wesley, 2000.
2. The Wikipedia article "Utah teapot" in http://en.wikipedia.org/wiki/Utah_teapot

Source Code:

• bezier_surface.f90, the source code.
• bezier_surface.csh, commands to compile the source code.

Examples and Tests:

• bezier_surface_prb.f90, a sample calling program.
• bezier_surface_prb.csh, commands to compile and run the sample program.
• bezier_surface_prb_output.txt, the output file.
• ../../data/bezier_surface/teapot_nodes.txt the node file for the teapot example.
• ../../data/bezier_surface/teapot_rectangles.txt the rectangle file for the teapot example.

List of Routines:

• BEZIER_PATCH_EVALUATE evaluates a Bezier patch.
• BEZIER_SURFACE_NEIGHBORS determines Bezier rectangle neighbors.
• BEZIER_SURFACE_NODE_PRINT prints nodes.
• BEZIER_SURFACE_NODE_READ reads nodes from a node file.
• BEZIER_SURFACE_NODE_SIZE counts nodes in a node file.
• BEZIER_SURFACE_NODE_WRITE writes nodes to a node file.
• BEZIER_SURFACE_RECTANGLE_PRINT prints rectangles.
• BEZIER_SURFACE_RECTANGLE_READ reads rectangles from a rectangle file.
• BEZIER_SURFACE_RECTANGLE_SIZE counts rectangles in a rectangle file.
• BEZIER_SURFACE_RECTANGLE_WRITE writes rectangle to a rectangle file.
• CH_CAP capitalizes a single character.
• CH_EQI is a case insensitive comparison of two characters for equality.
• CH_TO_DIGIT returns the integer value of a base 10 digit.
• DTABLE_DATA_READ reads data from a double precision table file.
• DTABLE_DATA_WRITE writes data to a double precision table file.
• DTABLE_HEADER_READ reads the header from a double precision table file.
• DTABLE_HEADER_WRITE writes the header to a double precision table file.
• DTABLE_WRITE writes a double precision table file.
• FILE_COLUMN_COUNT counts the number of columns in the first line of a file.
• FILE_ROW_COUNT counts the number of row records in a file.
• GET_UNIT returns a free FORTRAN unit number.
• I4MAT_PRINT prints an IMAT.
• I4MAT_PRINT_SOME prints some of an IMAT.
• I4MAT_TRANSPOSE_PRINT prints an IMAT, transposed.
• I4MAT_TRANSPOSE_PRINT_SOME prints some of the transpose of an IMAT.
• I4ROW_COMPARE compares two rows of an I4ROW.
• I4ROW_SORT_A ascending sorts the rows of an I4ROW.
• I4ROW_SWAP swaps two rows of an I4ROW.
• ITABLE_DATA_READ reads data from an integer table file.
• ITABLE_DATA_WRITE writes data to an integer table file.
• ITABLE_HEADER_READ reads the header from an integer table file.
• ITABLE_HEADER_WRITE writes the header to an integer table file.
• ITABLE_WRITE writes an integer table file.
• R8MAT_PRINT prints an R8MAT.
• R8MAT_PRINT_SOME prints some of an R8MAT.
• R8MAT_TRANSPOSE_PRINT prints an R8MAT, transposed.
• R8MAT_TRANSPOSE_PRINT_SOME prints some of an R8MAT, transposed.
• S_BLANK_DELETE removes blanks from a string, left justifying the remainder.
• S_TO_I4 reads an I4 from a string.
• S_TO_I4VEC reads an I4VEC from a string.
• S_TO_R8 reads an R8 from a string.
• S_TO_R8VEC reads an R8VEC from a string.
• S_WORD_COUNT counts the number of "words" in a string.
• SORT_HEAP_EXTERNAL externally sorts a list of items into ascending order.
• TIMESTAMP prints the current YMDHMS date as a time stamp.
• TIMESTRING writes the current YMDHMS date into a string.

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