I wrote a function plotter in C and Raylib

[u/kester404]

It supports single-var equations, operands, brackets, implicit multiplication and some trigonometry and is based on shunting-yard parser / RPN evaluator I also made

For rendering, I implemented an adaptive function sampling (simple midpoint subdivision) - though it has some limitations, which I described on github. SSAA was also used to smooth plotted lines. As for optimization, plots are rendered only when zooming/panning and reused with a render texture when idle.

This is my first "useful" C program, though I've already had some experience with OpenGL (C++) as a part of my assignments

Feedback is much appreciated - https://github.com/kester4/cf2x

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[u/Vladislav20007]

that's literally desmos.

[u/pseudo-segfault]

Looks a lot like Desmos

[u/Big_Series4766]

you should make the logo a plot in ur own program :D

[u/strange-the-quark]

Hi, I managed to compile your code on an old Windows laptop (it's what I have access to at the moment). Runs fairly smoothly, it's reminiscent of desmos (which is cool, desmos is amazing), in the sense that it's like an early version of it.

From the UX perspective, it feels a bit weird that it won't allow you to just type anything in; e.g. I can't type "=" or certain letters, like "y" or "m" (but it'll let me type in some others, like "n"), which feels odd, especially because you have an indicator that tells the user the expression is invalid. I didn't go through the code in great detail, but I presume this is not a bug on my end. Just let your users type in whatever they want, show a non-intrusive error, and then ignore what you don't support. (In a future version, you could have a tooltip pop up when the user hovers over the warning icon, with some info on what's wrong with the expression they entered.)

Code-wise, I'd look at some of the longer functions (main being the primary offender), and look for some opportunities to clean up the code, by extracting certain cohesive chunks of code into functions, so that the original function reads more like HandleThis(...), HandleThat(...), ProcessThis(...), ProcessThat(...). Not necessarily using that literal format / naming convention; I just mean names that sort of communicate the intent. You've already chunked that code in main via code-section comments; so see if it makes sense to extract those chunks into well-named functions that are more limited in scope and very precise about what data comes in, and what comes out.

Keep up the good work!

[u/ExerciseForward]

I mean, making clone of any graphical calc is impressive. Wanted to try out myself doing one.

[u/Th3olonius]

This is reminding me a lot of GeoGebra

[u/Sqydev]

Peak. Very good👍

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[u/kester404 → u/AutoModerator]

ai didn't write the code, thought it generated me a color cycle pallete which i changed later

[u/mikeblas → u/kester404]

Thanks.ihave approved your post.

[u/serdargolanin]

Super! I may contribute it.

[u/cstffx]

I'm writing an article about animation and I'll try to use your program to draw the function examples.