Turtle Graphics Logo Program

re: Turtle Graphics Logo Program

Jochen Kirstaetter — Sun, 10 Sep 2006 11:59:48 GMT

Hi Calvin,
Logo was one of the first programming languages I had contact with. During this time my parents bought a Joyce (Amstrad PCW 8512) and so I could experiment with Logo on CP/M+ OS. It was quite funny to produce those Lissajou graphics.

It's fun to see this stuff in VFP today.

Kind regards, JoKi

re: Turtle Graphics Logo Program

Calvin_Hsia — Mon, 11 Sep 2006 22:26:18 GMT

The Fox and VB versions of the turtle don’t show the same color because the order of RGB is a little different. Red is the low order 8 bits of the color in the Fox version, but the 3rd byte in the VB version.
Add these lines to make them the same.

Dim n As Integer
n = ((Me.oColor.R + Me.oColor.G * 256 + Me.oColor.B * 256 ^ 2) + nInputParam) And &HFFFFFF
Me.oColor = Color.FromArgb(&HFF000000 Or ((n And &HFF) * 256 ^ 2 + (n And &HFF00) + (n And &HFF0000) / 256 ^ 2))

Also, the Fox version always started with the same color after the turtle went out of bounds. The version available now on the website fixes that by saving/restoring the color around the call to InitVals.

re: Turtle Graphics Logo Program

Garrett Fitzgerald — Thu, 21 Sep 2006 21:33:54 GMT

Ael loved playing with the turtle. :-) Thanks!

re: Turtle Graphics Logo Program

AYESHA — Thu, 11 Jan 2007 19:37:06 GMT

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re: Turtle Graphics Logo Program

Peter Herzog — Tue, 10 Jul 2007 10:29:51 GMT

Hi Calvin

What a nice idea. Falling back in my past ... :-)

My first "try" ended in a fractal mandelbrot picture.

Greetings from germany

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re: Turtle Graphics Logo Program

abhirami — Tue, 19 Feb 2008 13:18:42 GMT

hi,my name is abhirami.i love computer. yesterday i learnt introduction to Logo.teacher said who has computer at home,do Logo strictly,so please.

re: Turtle Graphics Logo Program

abhirami — Tue, 19 Feb 2008 13:19:11 GMT

hi,my name is abhirami.i love computer. yesterday i learnt introduction to Logo.teacher said who has computer at home,do Logo strictly,so please.

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re: Turtle Graphics Logo Program

yavuz — Wed, 29 Oct 2008 19:58:57 GMT

hi;

i want to write a simple turtle graphics program.

your project is so good. i want to do like this but adding a command line(textbox) then work from command line.

sorry for my english :(

how can i do, adding a command line ?

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