Author Topic: Random Script Snippets (Read 3930 times)

Juju · « **on:** April 26, 2013, 06:01:32 pm »

Post random interesting PHP, Python, Javascript or whatever piece of code here.

<?php
function uchr($u){return mb_convert_encoding(&#39;&#38;#&#39;.intval($u).&#39;;&#39;,&#39;UTF-8&#39;,&#39;HTML-ENTITIES&#39;);}
$text = trim($argv[1],"\0..\x2f\x3a..\x40\x47..\x60\x67..\xff");
if(strlen($text)%2==1)$text="0".$text;
if(strlen($text)%4==2)$text.="00";
$char = Array(uchr(0x2000),uchr(0x2597),uchr(0x2596),uchr(0x2584),
                uchr(0x259D),uchr(0x2590),uchr(0x259E),uchr(0x259F),
                uchr(0x2598),uchr(0x259A),uchr(0x258C),uchr(0x2599),
                uchr(0x2580),uchr(0x259C),uchr(0x259B),uchr(0x2588));
for($i=0;$i<strlen($text);$i+=4){
        $byte = hexdec(substr($text,$i,2));
        $byte2 = hexdec(substr($text,$i+2,2));
        echo $char[(($byte&192)>>4)|(($byte2&192)>>6)].$char[(($byte&48)>>2)|(($byte2&48)>>4)];
        echo $char[($byte&12)|(($byte2&12)>>2)].$char[(($byte&3)<<2)|($byte2&3)]."\n";
}

Input: An 8x8 Axe sprite
Output: The sprite drawn using 4x4 characters.
Example:

Code: [Select]

[julien@haruhi ~]$ php axesprite.php [AA55AA55aa55aa55]
▚▚▚▚
▚▚▚▚
▚▚▚▚
▚▚▚▚

Why it's interesting: It uses bitwise operations! Also 4 pixels in a single character.

EDIT: Ignore the & at line 2 it's supposed to be a &.

aeTIos · « **Reply #1 on:** April 27, 2013, 12:10:44 am »

Lol, nice one. Will post one myself soon.

Juju · « **Reply #2 on:** May 09, 2013, 01:31:12 pm »

Code: [Select]

<?php
ob_start();
echo $num="1"," ";
$c=0;
for($a=0;$a<$argv[1]-1;$a++)
{
        $newnum="";
        for($i=0;$i<strlen($num);$i++)
        {
                $c++;
                if($num[$i] != (isset($num[$i+1])?$num[$i+1]:""))
                {
                        $newnum .= $c.$num[$i];
                        $c=0;
                }
        }
        echo $num=$newnum," ";
}
$out = ob_get_contents();
ob_end_clean();
echo str_replace(Array("1", "2", "3", " "),
Array(chr(27)."[44m1",
        chr(27)."[42m2",
        chr(27)."[41m3",
        chr(27)."[0m "),
        chunk_split($out, trim(`tput cols`), chr(27)."[0m\n"));

This one, running from CLI, makes use of output buffers to add some pretty colors

Takes one parameter, its the number of numbers to generate.

Example:

Joshuasm32 · « **Reply #3 on:** May 09, 2013, 07:01:17 pm »

Ahhhh... My eyes are burning...

Colors!

ben_g · « **Reply #4 on:** May 10, 2013, 12:09:12 pm »

Quote from: Juju on April 26, 2013, 06:01:32 pm

...
Input: An 8x8 Axe sprite
Output: The sprite drawn using 4x4 characters.
Example:
Code: [Select]
[julien@haruhi ~]$ php axesprite.php [AA55AA55aa55aa55] ▚▚▚▚ ▚▚▚▚ ▚▚▚▚ ▚▚▚▚Why it's interesting: It uses bitwise operations! Also 4 pixels in a single character.

EDIT: Ignore the & at line 2 it's supposed to be a &.

The 'sprite' doesn't look like a sprite to me. It just looks like 16 squares, in a square.

Juju · « **Reply #5 on:** May 10, 2013, 12:12:28 pm »

Quote from: ben_g on May 10, 2013, 12:09:12 pm

Quote from: Juju on April 26, 2013, 06:01:32 pm
...
Input: An 8x8 Axe sprite
Output: The sprite drawn using 4x4 characters.
Example:
Code: [Select]
[julien@haruhi ~]$ php axesprite.php [AA55AA55aa55aa55] ▚▚▚▚ ▚▚▚▚ ▚▚▚▚ ▚▚▚▚Why it's interesting: It uses bitwise operations! Also 4 pixels in a single character.

EDIT: Ignore the & at line 2 it's supposed to be a &.
The 'sprite' doesn't look like a sprite to me. It just looks like 16 squares, in a square.

You must lack the necessary fonts to show this character up. Which OS are you using? If Linux, try installing the Microsoft fonts, probably.

ben_g · « **Reply #6 on:** May 10, 2013, 12:16:17 pm »

I'm using windows 7.

This is a screenshot of how it shows up to me:

lkj · « **Reply #7 on:** May 10, 2013, 12:55:53 pm »

I'm also using Windows 7, but for me it shows up more or less correctly:

Jim Bauwens · « **Reply #8 on:** May 10, 2013, 01:26:08 pm »

Here is something I did in my spare time in C#. It's not really a snippit, but fun anyway^^

Main.cs - Main program code

Code: [Select]

using System;

namespace Fractal
{
	class MainClass
	{


		public static void TriLine(double distance, Turtle myTurtle)
		{
			Console.ForegroundColor = ConsoleColor.Magenta;
			if (distance < 1)
			{
				myTurtle.Forward(distance);
			}
			else
			{
				TriLine (distance/3, myTurtle);
				myTurtle.Left (60);
				TriLine (distance/3, myTurtle);
				myTurtle.Right (120);
				TriLine (distance/3, myTurtle); 
				myTurtle.Left (60);
				TriLine (distance/3, myTurtle);
			}
		}

		public static void Main (string[] args)
		{
			Console.WriteLine ("Press any key to start");
			Console.ReadLine ();

			Display myDisplay = new Display ();
			Turtle myTurtle = new Turtle (myDisplay);



			//myTurtle.HomeXPos = 10;
			myTurtle.HomeYPos = 10;

			for (int i = 0; i < 3; i++) {
				TriLine(300, myTurtle);
				myTurtle.Right(120);
			}

			myDisplay.UpdateDisplay ();

		}
	}
}

Turtle.cs - Turtle 'engine'

Code: [Select]

using System;

namespace Fractal
{
	public class Turtle
	{
		public double XPos  {get; set;}
		public double YPos  {get; set;}
		public double Angle {get; set;}

		public bool Pen {get; set;}

		public double HomeXPos  {get; set;}
		public double HomeYPos  {get; set;}

		private Display myDisplay;

		public Turtle(Display myDisplay)
		{
			XPos = 0;
			YPos = 0;
			Angle = 0;

			Pen = true;

			this.myDisplay = myDisplay;

			HomeXPos = myDisplay.Width / 2;
			HomeYPos = myDisplay.Height / 2;
		}


		public static double DegToRad(double deg)
		{
			return deg * Math.PI / 180;
		}



		public void Forward(double distance)
		{
			double oldX = XPos;
			double oldY = YPos;
			double angle = DegToRad(this.Angle);
					
			YPos = oldY + distance * Math.Cos(angle);
			XPos = oldX + distance * Math.Sin(angle);
					
			if (Pen)
			{
				myDisplay.DrawLine (
					(int) Math.Round(HomeYPos + oldY), 
					(int) Math.Round(HomeXPos + oldX), 
					(int) Math.Round(HomeYPos + YPos), 
					(int) Math.Round(HomeXPos + XPos)
				);

				//m
			}	
			
		}

		public void Left(double angleDelta)
		{
			Angle -= angleDelta;
		}

		public void Right(double angleDelta)
		{
			Angle += angleDelta;
		}

		public override string ToString ()
		{
			return string.Format ("[Turtle: XPos={0}, YPos={1}, Angle={2}]", XPos, YPos, Angle);
		}
	}
}

Display.cs - Allows you to draw to your console

Code: [Select]

using System;

namespace Fractal
{
	public class Display
	{
		public const string PIXEL_ON = "\u2588\u2588";
		public const string PIXEL_OFF = "  ";
		public const int PIXEL_CHARS = 2;

		public int Height { get; set; }
		public int Width { get; set; }

		public bool[,] DisplayBuffer;

		public Display()
		{
			SetDisplay ();
		}

		public void SetDisplay ()
		{
			Width = Console.BufferWidth / PIXEL_CHARS;
			Height = Console.BufferHeight - 2;

			DisplayBuffer = new bool[Height, Width];

			for (int i = 0; i < DisplayBuffer.Length; i++) {
				DisplayBuffer [(int) i/Width, i%Width] = false;
			}

		}

		public void SetPixel (int y, int x, bool state)
		{
			if (x > 0 && y > 0 && x < Width && y < Height)
				DisplayBuffer [y, x] = state;
		}

		public void DrawLine(int x1, int y1, int x2, int y2) {
			int w = x2 - x1;
			int h = y2 - y1;
			
			int dx1 = 0, dy1 = 0, dx2 = 0, dy2 = 0 ;
			
			if (w<0) dx1 = -1 ; else if (w>0) dx1 = 1 ;
			if (h<0) dy1 = -1 ; else if (h>0) dy1 = 1 ;
			if (w<0) dx2 = -1 ; else if (w>0) dx2 = 1 ;
			
			int longest  = Math.Abs(w) ;
			int shortest = Math.Abs(h) ;
			
			if (!(longest>shortest)) {
				longest = Math.Abs(h) ;
				shortest = Math.Abs(w) ;
				if (h<0) dy2 = -1 ; else if (h>0) dy2 = 1 ;
				dx2 = 0 ;            
			}
			
			int numerator = longest >> 1;
			
			for (int i=0; i<=longest; i++) {
				SetPixel(x1 , y1, true) ;
				numerator += shortest ;
				if (!(numerator<longest)) {
					numerator -= longest ;
					x1 += dx1 ;
					y1 += dy1 ;
				} else {
					x1 += dx2 ;
					y1 += dy2 ;
				}
			}
		}

		public void UpdateDisplay()
		{
			Console.SetCursorPosition (0, 0);

			for (int y = 0; y < Height; y++) {
				for (int x = 0; x < Width; x++) {
					string pixel = DisplayBuffer[y, x] ? PIXEL_ON : PIXEL_OFF;
					Console.Write (pixel);
				}
				Console.WriteLine ();
			}
		}

	}
}

Now, here is what it looks like:

Of course, I set my terminal to have very very many rows and columns so I can simulate pixels. (however you can change the code to work on a 'lower' resolution)

Author Topic: Random Script Snippets (Read 3930 times)

Juju

Random Script Snippets

aeTIos

Re: Random Script Snippets

Juju

Re: Random Script Snippets

Joshuasm32

Re: Random Script Snippets

ben_g

Re: Random Script Snippets

Juju

Re: Random Script Snippets

ben_g

Re: Random Script Snippets

lkj

Re: Random Script Snippets

Jim Bauwens

Re: Random Script Snippets