Image:Antialiased.png

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Antialiased.png‎ (12 ko, type MIME : image/png)

Ce fichier et les informations de sa page de description sont importés depuis Wikimedia Commons.

Pour savoir comment télécharger et/ou importer une image sur Commons, Consultez Wikipédia:Wikimedia Commons.

La bildo estas kopiita de wikipedia:en. La originala priskribo estas:

antialiased chessboard

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

generated by this code, which I (Loisel 03:57 Jan 24, 2003 (UTC)) wrote myself

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>
#include <assert.h>
int color(double x, double y)
{
  double t,z;
  int i,j,k;

  x=x/128.0-0.5;
  y=y/1024.0;

  t=1.0/(y+0.01);
  z=t*x;
  i=floor(t);
  j=floor(z);
  k=i+j;
  //  printf("%f %f -> %i %i %i\n",t,z,i,j,k%2);
  return ((k%2)!=0);
}

double myrand()
{
  return rand()/((double)RAND_MAX);
}

int main()
{
  int i,j,k,l;
  double x,y;
  printf("P5\n128 128\n255\n");
  srand(time(0));
  for(i=0;i<128;i++)
    for(j=0;j<128;j++)
      {
         k=0;
         for(l=0;l<255;l++)
           {
             x=j+myrand();
             y=i+myrand();
             k+=color(x,y);
           }
         assert(k>=0 && k<=255);
         k=(k/4)*4; // cygwin bug?
         fwrite(&k,1,1,stdout);
      }
}

date/time	username	edit summary
19:22, 22 December 2004	en:User:Quadell	(tagged)
20:47, 6 December 2004	en:User:Bernard Helmstetter	(code fix up)
03:57, 24 January 2003	en:User:Loisel
03:57, 24 January 2003	en:User:Loisel	(antialiased chessboard)

[edit] Historio de la dosiero

Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version.

Click on date to download the file or see the image uploaded on that date.

(del) (cur) 13:33, 30 September 2005 . . en:User:Riumplus Riumplus ( en:User_talk:Riumplus Talk) . . 128x128 (11600 bytes) (Losslessly recompressed the image, shrinking file size by 2%)
(del) (rev) 20:28, 24 January 2003 . . en:User:Loisel Loisel ( en:User_talk:Loisel Talk) . . 128x128 (11861 bytes) (slightly improved image)

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Récupérée de « http://fr.wikipedia.org../../../a/n/t/Image%7EAntialiased.png_8eb8.html »

Image:Antialiased.png

Un article de Wikipédia, l'encyclopédie libre.

[edit] Historio de la dosiero

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