Quadratic Grapher - Ice's Return

Quadratic Grapher - Ice's Return - Printable Version

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Quadratic Grapher - Ice's Return - Iceglade - 09-02-2014

After a 5+ month hiatus from redstone, I'm starting again with a medium-sized project - in particular, the second iteration of my grapher. Pictures will be posted as the project grows.

Features:

Constant, linear, and quadratic graphing
Four 16x16 quadrants
"Filled-in" curves
2 bit signed coefficients
Fast, multiplication-free algorithm

Pictures:

The algorithm:

In pseudocode, the algorithm is as follows (with a, b, c the coefficients of the quadratic ax^2 + bx + c):

Code:
x := 0

y := c

e := a

while plotting:

    plot(x, y)

    x += 1

    y += (e + b)

    e += (a >> 1)

Explanation: coming soon

RE: Quadratic Grapher - Ice's Return - greatgamer34 - 09-02-2014

very nice, i wish you luck! Smile

RE: Quadratic Grapher - Ice's Return - Iceglade - 09-02-2014

I've just posted the algorithm. I... may or may not explain it in this thread.

RE: Quadratic Grapher - Ice's Return - jxu - 09-03-2014

My comments:
Why start x at 0? Unless you plan to mirror the image
AFAIK formula is just derived from F(x+1) - F(x)

RE: Quadratic Grapher - Ice's Return - Iceglade - 09-03-2014

(09-03-2014, 09:59 PM)͝ ͟ ͜ Wrote: My comments:
Why start x at 0? Unless you plan to mirror the image
AFAIK formula is just derived from F(x+1) - F(x)

1. Yes, I do.
2. Aren't you smart?

RE: Quadratic Grapher - Ice's Return - jxu - 09-06-2014

You bet your goddamn ass I am