Free interactive geometry software software for linux

Interactive BDD Environment project is a shell like utility for working with ROBDDs.

IBEN is a tool used for teaching Reduced Ordered Binary Decision Diagrams.

It allows the student to work with ROBDDs without learning a complex C or C++ interface to an ROBDD package.

One can enter the expressions interactively, and view the result as a graph or ask questions about the ROBDD, such as the number of nodes in the ROBDD.

slakbootIBS (Slackware Interactive Boot Scripts) is an enhanced set of replacement boot scripts for the Slackware Linux distribution.

Slackware Interactive Boot Scripts includes a set of control and dispatch tools for configuring and booting with colorized interactive scripts. The new boot process allows the operator to select or skip start-up components in realtime.

It facilitates debugging of startup problems and allows operators to maintain a common baseline to support several local configurations or multiple servers with a single set of scripts.

IO::Interactive is a Perl module with utilities for interactive I/O.

SYNOPSIS

use IO::Interactive qw(is_interactive interactive busy);

if ( is_interactive() ) {
print "Running interactivelyn";
}

# or...

print {interactive} "Running interactivelyn";


$fh = busy {
do_noninteractive_stuff();
}

This module provides three utility subroutines that make it easier to develop interactive applications...

is_interactive()

This subroutine returns true if *ARGV and *STDOUT are connected to the terminal. The test is considerably more sophisticated than:

-t *ARGV && -t *STDOUT

as it takes into account the magic behaviour of *ARGV.

You can also pass is_interactive a writable filehandle, in which case it requires that filehandle be connected to a terminal (instead of *STDOUT). The usual suspect here is *STDERR:

if ( is_interactive(*STDERR) ) {
carp $warning;
}
interactive()

This subroutine returns *STDOUT if is_interactive is true. If is_interactive() is false, interactive returns a filehandle that does not print.

This makes it easy to create applications that print out only when the application is interactive:

print {interactive} "Please enter a value: ";
my $value = ;

You can also pass interactive a writable filehandle, in which case it writes to that filehandle if it is connected to a terminal (instead of writinbg to *STDOUT). Once again, the usual suspect is *STDERR:

print {interactive(*STDERR)} $warning;

busy {...}

This subroutine takes a block as its single argument and executes that block. Whilst the block is executed, *ARGV is temporarily replaced by a closed filehandle. That is, no input from *ARGV is possible in a busy block. Furthermore, any attempts to send input into the busy block through *ARGV is intercepted and a warning message is printed to *STDERR. The busy call returns a filehandle that contains the intercepted input.

A busy block is therefore useful to prevent attempts at input when the program is busy at some non-interactive task.

The friendly interactive shell is a user friendly shell intended mostly for interactive use.
- If you want to see screenshots of fish in action, click here.
- If you are familiar with the basics of shells,read this page for a short introduction to fish.
- If you are dont know how to use a shell, read this page for a longer presentation on how to use fish.

Normal/Displacement Map Generator is a tool designed to help you create Geometry Normal Maps. Such maps are used in high-end Games to fool the Player into believing that a Low Resolution Mesh does have much more detail than it actually does.

Those kind of Normal Maps are best generated using a High Resolution Mesh from which the Normal Informations is extracted and projected onto the Low Resolution Mesh. This tool provides exactly this functionality. A known tool to do the same is ORB but it is windows only and impracticable to use for developing a game on a Linux system.

Besides generating a Geometry Normal Map this tool can also apply a Detail Normal Map onto of the generated Geometry Normal Map. Such Normal Maps are easily created using Normal-Plugins for 2D Graphic Applications like The GIMP. Those Normal Informations are then used to enhance the generated Normal Map. This process can be repeated many times.

Also generated is a Displacement or Height Map. Those maps can be used for Offset Mapping or with never Pixel Shader version to render a Low Resolution Mesh with much more detail by creating Vertices and Faces on the fly during rendering displacing them using such a Displacement Map. This map can also be used as a pure Height Map for Terrain Generators.

Dr. Geo is a GTK interactive geometry software. It allows one to create geometric figure plus the interactive manipulation of such figure in respect with their geometric constraints. It is useable in teaching situation with students from primary or secondary level.

Dr. Geo integrates advanced features as an integrated Scheme programming language to define scripts within a figure. The language is also used to define functionnaly interactive figure.

Dr. Geo is a software part of the GNU project. This means it is a free software (as free speech) and you have access to the source code under the GPL license. You can modify and distribute it as long as the same distribution license (GPL) is used.

Geomview is an interactive 3D viewing program for Unix. Geomview lets you view and manipulate three-dimensional objects: you use the mouse to rotate, translate, zoom in and out, and so on.

Geomview can be used as a standalone viewer for static objects or as a display engine for other programs which produce dynamically changing geometry. Geomview can display objects described in a variety of file formats. Geomview comes with a wide selection of example objects, and you can create your own objects too.

Geomview runs on most Unix platforms, including GNU/Linux. Geomview can run under Microsoft Windows using Cygwin. Geomview is free software available under the terms of the GNU Lesser General Public License (GPL).

You can also use Geomview to handle the display of data coming from another program that is running simultaneously. As the other program changes the data, the Geomview image reflects the changes. Programs that generate objects and use Geomview to display them are called external modules. External modules can control almost all aspects of Geomview. The idea here is that many aspects of the display and interaction parts of geometry software are independent of the geometric content and can be collected together in a single piece of software that can be used in a wide variety of situations. The author of the external module can then concentrate on implementing the desired algorithm and leave the display aspects to Geomview. Geomview comes with a collection of sample external modules, and the manual describes how to write your own.

Geomview allows multiple independently controllable objects and cameras. It provides interactive control for motion, appearances (including lighting, shading, and materials), picking on an object, edge or vertex level, snapshots in many image file, PostScript, or Renderman RIB format, and adding or deleting objects is provided through direct mouse manipulation, control panels, and keyboard shortcuts.

Geomview supports the following simple data types: polyhedra with shared vertices (.off), quadrilaterals, rectangular meshes, vectors, and Bezier surface patches of arbitrary degree including rational patches. Object hierarchies can be constructed with lists of objects and instances of object(s) transformed by one or many 4x4 matrices. Arbitrary portions of changing hierarchies may be transmitted by creating named references.

The full specification for object file formats is in the OOGL (Object Oriented Graphics Language) Reference section of the Geomview manual. If you already have Geomview you might want to try out the OOGL tutorial.

Geomview can be used as a Mathematica graphics output device; this makes viewing Mathematica graphics much more interactive. The same is true for Maple. Geomview began as an effort at the Geometry Center at the University of Minnesota to provide interactive geometry software which is particularly appropriate for mathematics research and education. In particular, Geomview can display objects in hyperbolic and spherical space as well as Euclidean space.