DRAWCGM_UTILITIES
Utility Routines for DRAWCGM Graphics.

DRAWCGM_UTILITIES is a FORTRAN77 library which supplies some utility routines for use with the DRAWCGM graphics package.

Licensing:

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

Related Data and Programs:

DRAWCGM a library of FORTRAN and C routines for graphics output in CGM, PostScript or X11 format;

Source Code:

• drawcgm_utilities.f, the source code.
• drawcgm_utilities.csh, commands to compile the source code.

Examples and Tests:

• drawcgm_utilities_prb.f, a sample calling program.
• drawcgm_utilities_prb.csh, commands to compile and run the sample program.
• drawcgm_utilities_prb_output.txt, the output file.

Individual graphics images from the sample calling program:

• arrow_demo.png, a PNG file containing a demo of ARROW.
• carc_and_wedge_demo.png, a PNG file containing a demo of CARC and WEDGE.
• carc_demo.png, a PNG file containing a demo of CARC.
• cbox_demo.png, a PNG file containing a demo of CBOX.
• cgrid2_demo.png, a PNG file containing a demo of CGRID2.
• chrplt_demo.png, a PNG file containing a demo of CHRPLT.
• cirkle_filled_demo.png, a PNG file containing a demo of CIRKLE.
• cirkle_open_demo.png, a PNG file containing a demo of CIRKLE.
• clip_demo.png, a PNG file containing a demo of CLIP.
• color_wheel.png, a PNG file containing an image of a color wheel.
• dshlin_demo.png, a PNG file containing a demo of DSHLIN.
• ellipse_demo.png, a PNG file containing a demo of ELLIPSE.
• oval_demo.png, a PNG file containing a demo of OVAL.
• pgrid_demo.png, a PNG file containing a demo of PGRID.
• splxy_demo.png, a PNG file containing a demo of SPLXY.
• square_and_diamond_demo.png, a PNG file containing a demo of SQUARE and DIAMOND.
• trihatch_demo.png, a PNG file containing a demo of TRIHATCH.

List of Routines:

• ARROW draws an arrow at any point on a graph.
• ARROW2 draws an arrow with the arrowhead size being specified.
• BOX draws a rectangle with specified corners.
• BOX01 draws the unit square.
• CARC draws a circular arc of a given angular size and radius.
• CBOX draws a 16 by 16 box of colors in the current color table.
• CGRID2 draws evenly spaced Cartesian X and Y grid lines.
• CHRPLT plots a character string onto a graphics image.
• CIRKLE draws an open or filled circle of a given radius.
• CLIP determines the portion of a line that lies within a rectangle.
• CLIP1 is used by CLIP.
• CLIP2 is used by CLIP1.
• CUBSPL defines a cubic spline for given data.
• DELFIL deletes the file FILNAM if it exists.
• DIAMND draws an open or filled diamond of a given size.
• DIAMOND draws a diamond of height HITE centered at the point X, Y.
• DSHLIN draws a dashed line connecting a series of points.
• ELLIPSE draws an ellipse for a picture being created by DRAWCGM.
• GAUSS is a simple function used by SETTAB.
• GETUNIT returns a free FORTRAN unit number.
• INTERV seeks to bracket a value within a vector of increasing values.
• IXTOX maps integer IX in [IXMIN, IXMAX] to real X in [XMIN, XMAX].
• LENCHR returns the length of STRING up to the last nonblank character.
• OVAL draws a "filled in" ellipse for a picture being created by DRAWCGM.
• PGRID draws evenly spaced grid lines for polar coordinates.
• PPVALU evaluates a piecewise polynomial function or its derivatives.
• REVEN returns N real values, evenly spaced between XLO and XHI.
• RRANGE computes the range of a real array.
• SCALE resets the current coordinate system for the picture.
• SCL01 restores the coordinate system to the default 0, 1 system.
• SETTAB sets up the color table.
• SPLXY computes a cubic spline interpolant to (X,Y) data.
• SQUARE draws a square centered at a given point.
• TRIHATCH draws a triangle filled with diagonal hatch marks.
• WEDGE draws a circular wedge of a given angular size and radius.
• XTOIX maps real X in [XMIN, XMAX] to integer IX in [IXMIN, IXMAX].

You can go up one level to the FORTRAN77 source codes.