sometime in 2000 i was sort of “challenged” by lan to make a cool graphing calculator. it’s a stupid story, but this program is the end result. i know it’s horribly underfeatured (i.e. fixed axis, no scaling, poor painting refresh, no options, etc) but i had never intended this for public use.

probably the hardest part was making the equation parser/interpreter. in retrospect, i did a horribly messy and inefficient job with it, but it works. the graphics were surprisingly easy.

for now, i think it supports abs, sin, cos, tan, asin, acos, atan, log, ln, +, -, *, /, ^ and maybe some others i’m forgetting.

anyways, check it out and email me with any neat equations you find. if you can’t get the program to work (weird error messages?) let me know and i’ll see what i can do.

screenshots

download

Source: GraphCalcSrc.zip (11 Kb) Executable: GraphCalc.zip (381 Kb)

The executable package contains the opengl files opengl32.dll and glu32.dll. If you know what these are, and know that you don’t need them, feel free to delete (to improve performance.)