91 lines
3.1 KiB
Groff
91 lines
3.1 KiB
Groff
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.TH ICO 1 __xorgversion__
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.SH NAME
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ico \- animate an icosahedron or other polyhedron
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.SH SYNOPSIS
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.B ico
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[-display display] [-geometry geometry]
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[-r] [-d pattern] [-i] [-dbl] [-faces] [-noedges]
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[-sleep n] [-obj object] [-objhelp] [-colors color-list]
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.SH DESCRIPTION
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.I Ico
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displays a wire-frame rotating polyhedron, with hidden lines removed,
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or a solid-fill polyhedron with hidden faces removed.
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There are a number of different polyhedra available;
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adding a new polyhedron to the program is quite simple.
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.SH OPTIONS
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.TP
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.B -r
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Display on the root window instead of creating a new window.
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.TP
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.B -d pattern
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Specify a bit pattern for drawing dashed lines for wire frames.
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.TP
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.B -i
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Use inverted colors for wire frames.
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.TP
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.B -dbl
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Use double buffering on the display.
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This works for either wire frame or solid fill drawings.
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For solid fill drawings, using this switch results in substantially
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smoother movement.
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Note that this requires twice as many bit planes as without double buffering.
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Since some colors are typically allocated by other programs,
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most eight-bit-plane displays will probably be limited to eight colors
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when using double buffering.
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.TP
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.B -faces
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Draw filled faces instead of wire frames.
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.TP
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.B -noedges
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Don't draw the wire frames.
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Typically used only when -faces is used.
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.TP
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.B -sleep \fIn\fP
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Sleep n seconds between each move of the object.
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.TP
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.B -obj \fIobject\fP
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Specify what object to draw.
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If no object is specified, an icosahedron is drawn.
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.TP
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.B -objhelp
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Print out a list of the available objects, along with information
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about each object.
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.TP
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.B -colors \fIcolor color ...\fP
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Specify what colors should be used to draw the filled faces of the object.
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If less colors than faces are given, the colors are reused.
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.SH PROGRAM TERMINATION
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.LP
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Pressing "q" will close a window. If compiled with threads support, the
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program will stop only when all threads terminate. You can also close an
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animation window using the ICCCM \fIdelete\fP message (depending on your
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window manager, you will have a decoration button or menu to send such
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message).
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.SH ADDING POLYHEDRA
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.LP
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If you have the source to ico, it is very easy to add more polyhedra.
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Each polyhedron is defined in an include file by the name of objXXX.h,
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where XXX is something related to the name of the polyhedron.
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The format of the include file is defined in the file polyinfo.h.
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Look at the file objcube.h to see what the exact format of an objXXX.h
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file should be, then create your objXXX.h file in that format.
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.LP
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After making the new objXXX.h file (or copying in a new one from elsewhere),
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simply do a 'make depend'.
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This will recreate the file allobjs.h, which lists all of the objXXX.h
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files.
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Doing a 'make' after this will rebuild ico with the new object information.
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.SH "SEE ALSO"
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X(__miscmansuffix__)
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.SH BUGS
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.LP
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Pyramids and tetrahedrons with filled faces do not display correctly.
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.LP
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A separate color cell is allocated for each name in the -colors list, even
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when the same name may be specified twice. Color allocation fails in
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TrueColor displays and option \fI-faces\fP does not work well.
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.SH COPYRIGHT
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Copyright 1994 X Consortium
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.br
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See \fIX(__miscmansuffix__)\fP for a full statement of rights and permissions.
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