[E2] Simple parametric graph drawing code

[flarn2006]

I wrote some simple E2 code to draw a parametric graph on a digital screen. It draws a circle by default, but it can easily be adapted to draw any functions. Here's the code:

@name Parametric Graph
@inputs S:wirelink
@outputs
@persist
@trigger 

S[1048574] = 0

Color = 994000

for (T=-180,180) {
    #Functions are here
    X = sin(T)
    Y = cos(T)
    #End functions
    X = round(15*X+15)
    Y = round(-15*Y+15)
    S[32*Y+X] = Color
}

[jacoby6000]

That's not a parametic graph silly head ^_^ its a circle! A paramedic graph would be more along the lines of
X=T
Y=tan(T)+sin(T)/2
But that's just a guess

[SuperLlama]

afaik, parametric simply means that it draws things based on parameters, which would imply that a circle is valid. I'm probably wrong, through.

[mjmr89]

Parametric means you give it how to draw x and y based on another variable, t. The circle in the topic is parametric because it uses T to calculate X and Y, and gives those separately to the screen. Jacobys example is also parametric, but it doesn't have to be like that.

But about the actual topic, that's pretty cool

[Fizyk]

Parametric means just that you have some space with coordinates (y1,...,yn) and some parameters (x1,...,xm) and you draw a graph for (y1,...,yn)=f(x1,...,xm). For a circle, your coordinates are just (x,y) and you have one parameter t - yes, it is a parametric graph.

[Azrael]

A nice improvement would be auto-detection of the screen size (there's a register for it) and auto-scaling the region you want drawn to take up the entirety of the screen. Grid lines would also be nice.

[jacoby6000]

ohh... it says parametric... i thought it said paramedic (no T)... /me slaps self in face

now that i see that =D its pretty awesome

[flarn2006]

In case anyone's wondering, the reason I said parametric graph instead of circle is because the code can be easily modified to make it draw a different shape or curve.

EDIT: Oops, I just realized I bumped an old thread. Sorry!