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Why? The vast majority of the time I spent creating Graph3DC was not invested in the 3D graphing, computation, and rendering code, but in building hook after hook to integrate with the OS, and more importantly, to work around OS bugs.

In fact, had I chosen to make Graph3DC a non-App program from the beginning, I think the program would have been released months, if not years, earlier.

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For better or for worse, that appears to no longer be feasible, but I can say with some confidence that if I have the time, I will port Graph3DC to the TI-84 Plus CE as a non-App program runnable using Doors CE 9.

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Full compatibility with horizontal splitscreen mode.Īs I once stated in the Graph3DC Closed Beta 1 news article, and have repeated ever since, one of my primary motivations behind creating (and finishing) Graph3DC was "to show TI that by releasing the keys necessary for us to write free Apps for their TI-84+CE, they'll be only strengthening that platform's appeal to students, teachers, and programmers." I wanted TI to know that the community can not only create powerful, fast games and useful programming tools for students, but can also create educational applications that are genuinely helpful in the classroom.

TI-OS integration with the Y=, Window, Zoom, Trace, and Graph tools.

User-configurable grid colors, background colors, bounds and axis display, axis labels, and more.

Tracing over graphs to examine the (X, Y, Z) coordinates of points.

Simultaneous graphing of up to 5 3D equations at normal resolution, or 2 3D equations at high resolution.

Rendering and rotation of 3D graphs on up to a 17x17-point grid at normal resolution, or 27x27-point grid at high resolution.

As stated in the recent Open Beta 2 news article about Graph3DC, among its most distinguish features are:

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It integrates with the TI-OS, like TI's Transformation Graphing and Inequality Graphing Apps, and thus can offer 3D graphing within the TI-OS graphing tools that students and teachers already know how to use (while leaving 2D graphing instantly available to avoid any confusion). Therefore, I present today a 3D graphing App for the TI-84 Plus C Silver Edition, capable of graphing up to five simultaneous equations in the form Z=f(X,Y). In the time this project has gestated, the TI-84 Plus C Silver Edition has gone from the leading member of the TI-84 Plus family to a barely-remembered third cousin of the sleek new TI-84 Plus CE, but completionist that I am, I refused to let the work I put into Graph3DC go to waste. Your mileage with it may very well vary.After nearly two years of work, a closed beta, and an open beta, I'm proud to present Graph3DC for the TI-84 Plus C Silver Edition.

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Unfortunately development seems to have stopped several years ago, and recently I have had some difficulty building the source code on my Gentoo Linux machine.

The list goes on, but the gnuplot project page maintains a list of front-ends and programming interfaces using it.įor 3D plots of algebraic relations (polynomials etc.), a slightly less well-known program is surf, which was intended as a visualization aid for real algebraic geometry.

In addition to using the gnuplot backend, Maxima also supports a different xMaxima backend for plotting.

maxima and its GUI wxMaxima forms a freely available computer algebra system with a nice interface.

Sympy also is based on the basic Python syntax, but its interface and use may be more familiar and accessible to people who have already some familiarity with a computer algebra system.

matplotlib is extremely powerful and configurable, but requires some amount of Python programming from the students.

In terms of the front end, depending on what your students are familiar with and are willing to learn, there are many options. Instead, your choices are mostly between the various front ends. In terms of free software, a large portion of the available choices are based on a Gnuplot backend I however would probably not recommend directly using Gnuplot.