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DarkBASIC Professional Discussion / Drawing Equation

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Tranberg

Years of Service

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Joined: 27th Feb 2012

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Posted: 27th Feb 2012 23:49

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How do i get darkbasic to draw a given equation like:

4x^2 + 2x^3 + 12 = 0

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Diggsey

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Joined: 24th Apr 2006

Location: On this web page.

Posted: 28th Feb 2012 03:13

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Well that equation isn't technically a curve, it's just three values, but if you mean how can you plot something like this:

y = 4x^2 + 2x^3 + 12

Then you might use something like this:

+ Code Snippet

sync on

xscale# = 0.02
yscale# = 0.10
for x = 0 to screen width()
   x# = (x-screen width()/2)*xscale#
   y# = 4*x#^2.0 + 2.0*x#^3.0 + 12.0
   y = screen height()/2-(y#/yscale#)
   if x then line x-1, oy, x, y
   oy = y
next x

line 0, screen height()/2, screen width(), screen height()/2
line screen width()/2, 0, screen width()/2, screen height()

sync : sync

wait key

[b]

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