I3DM(6D)							      I3DM(6D)

NAME    [Toc]    [Back]

     i3dm - Interactive	3D Modeler

SYNOPSIS    [Toc]    [Back]

     i3dm

DESCRIPTION    [Toc]    [Back]

     I3DM is an	Interactive 3D Modeler.	 It is provided	for the	demonstration
     of	basic modeling techniques and to show the power	of Silicon Graphics'
     workstations.  There are many modeling programs available on the market,
     many of which have	far more capabilities than I3DM	offers,	however	I3DM
     is	license-free, and is available at no charge.

     Some of the features include line and curve drawing, surface of
     revolution, extrusions, texture-mapping (when run on machines that
     support it), interactive manipulation of objects created in wireframe and
     fully rendered form, Stereoscopic viewing (for systems equipped with
     StereoView), and live video textures and backgrounds (on machines
     equipped with VideoLab).  Models created with I3DM	may be written in
     SuperViewer format, or as an IRIS Inventor	SceneGraph.

Menu Window    [Toc]    [Back]

     Make Menu selections with right mouse button.

   Dialog and Message Window    [Toc]    [Back]
     Commands may be typed while cursor	is in any I3DM Window.

   View	Windows
     Right mouse button	invokes	per-view pop-up	menu options.  Left mouse
     button for	drawing/modification actions (moves, rotates, scales etc.).

     Line drawing is done with the Left	mouse button in	all but	the
     Perspective view.	The Middle mouse button	may be used to "snap" a	line
     vertex to an existing vertex in any view.

     If	no command is active, Middle mouse button pans view, Left & Middle
     zooms view.

Create Menu    [Toc]    [Back]

     Selecting the Create menu with the	right mouse button invokes a popup
     menu with several options.

Surface	Menu
     The Surface menu allows one to create surfaces out	of lines and curves.
     Examples include revolved and extruded surfaces, faces, and patches.  A
     short explanation of each feature is given	below.	For more details refer
     to	the Tutorial section of	this document.

Pick Menu    [Toc]    [Back]

     All directed actions on existing geometry (revolving, extruding, changing
     color/material, applying textures etc.) are applied to picked objects.
     Before a line or curve may	be revolved it must be picked and highlighted.



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I3DM(6D)							      I3DM(6D)



     When a new	item is	created	(line, curve, sphere etc.), all	currently
     picked objects (if	any) are first "unpicked", then	the new	object is
     automatically picked and ready for	further	action.	 The Pick menu offers
     various options for controlling picked objects.

Xform Menu    [Toc]    [Back]

     Picked objects may	be transformed by using	the options located under the
     Xform menu.  Transformation arguments (rotate angles, scale factors, move
     positions etc.) may be typed or interactively issued with the mouse.

Done Button    [Toc]    [Back]

     The Done button is	used to	terminate commands (the	enter key on the
     keyboard will do the same thing).	Creation commands that allow typed-in
     options (such as circles and spheres etc.)	do not cause anything to be
     created until done	is hit or enter	is typed.

Edit Menu    [Toc]    [Back]

     Picked lines/curves and surfaces may be edited by using the Edit rollover
     menu options.

Delete Button    [Toc]    [Back]

     Deletes picked objects.

Textures Menu    [Toc]    [Back]

     Textures may be applied to	primitives (spheres, cylinders etc.),
     revolved, extruded, and patch surfaces.  Currently	faces cannot be
     textured.

     Before textures may be used, a texture index file must exist in the
     directory the modeler was invoked from or in a directory
     /usr/demos/General_Demos/i3dm/data.  This file must have the name
     "textures.index" and contain a list of the	textures (one per line)	that
     are available to be used.	The format of each line	in the file is as
     follows:

     <texture_number> <texture_name> <path name	to sgi rgb file>

     Examples:

	     1 brick /usr/textures/brick.rgb
	     2 wood  /my_directory/textures/wood.rgb
	     3 Video video

     If	the system supports texture mapping, and the index file	is correctly
     configured, a list	of textures will exist in the Texture menu.  Textures
     are mapped	to objects by first picking them then selecting	the desired
     texture from the list.

     Live-Video	Textures






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I3DM(6D)							      I3DM(6D)



     If	your system is equipped	with the VideoLab option, a texture entry in
     the texture index file may	specify	video instead of an rgb	file as	shown
     for texture 3 in the examples above.  This	provides for live motion video
     textures.

Attrib Menu    [Toc]    [Back]

     Used to set various attributes of picked objects.

Display	Menu
     The Display menu has options to control things such as what gets
     displayed.	 For instance, you might want to turn off vertices.

Textures    [Toc]    [Back]

File Menu
     The File menu allows for filing and restoring models, and is where	the
     Exit function is.	Models may be filed and	restored in i3dm format, or
     filed in SuperViewer or Iris Inventor formats.

AUTHOR    [Toc]    [Back]

     John Kichury, Silicon Graphics Computer Systems


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