Mathray
x^2 + y^2=(1 - z)*z^4
81*(x^3 + y^3 + z^3)
- 189*(x^2*y + x^2*z + y^2*x + y^2*z + z^2*x + z^2*y)
+ 54*x*y*z
+ 126*(x*y + x*z + y*z)
- 9*(x^2 + y^2 + z^2)
- 9*(x + y + z)
+ 1 = 0
Mathray is a general-purpose high-quality mathematical plotter.
Getting Started
Mathray requires java and maven to be installed.
Mathray can be run in one of two ways:
- For *nix platforms, use the ./mathray driver script
- For other platforms, pay attention to the java command in the script. Use
dependency:build-classpathto find the appropriate classpath. The final command will be something like:
java -cp target/mathray-0.01-SNAPSHOT.jar:{big_long_maven_classpath} mathray.cli.Main
The usage statement is pretty self-explanatory:
usage: mathray ""
-h,--height height of output in pixels
--help print this message
--output file to write result to
-w,--width width of output in pixels
--xa lowest (left-most) x value visible in output
--xb highest (right-most) x value visible in output
--ya lowest y value visible in output (near bottom)
--yb highest y value visible in output (near top)
Examples
Specifying a function in x causes mathray to plot using a very simple and fast function plotter:
./mathray "sin(x)"
./mathray "log(x)+2/3*sin(2x * tau)"
Notice the "tau" constant, the real circle constant (see tauday.com). Mathray also supports plain-old pi and e.
Specifying an equation in x and y causes mathray to plot using an interval arithmetic solver:
./mathray "y^2*(y^2-(8/10)^2)=x^2*(x^2-1)"
Specifying an equation in x, y, and z causes mathray to plot using a 3D ray-tracer (or a direct analog thereof):
./mathray "x^2+y^2=(1-z)*z^4"