Talk:Abelian sandpile model: Difference between revisions

== Incorrect .PPM File created by C code. ==

The current C code uses directly code directly copied from ppm Bitmap Writing page.

This consequently leads to a useless .ppm image created.

The following lines of code need to be replaced:

for(i=0;i<sandPileEdge;i++){

:for(j=0;j<sandPileEdge;j++){

::colour[0] = (sandPile[i][j] + i)%256;

::colour[1] = (sandPile[i][j] + j)%256;

::colour[2] = (sandPile[i][j] + i*j)%256;

:;fwrite(colour,1,3,fp);

:}

}

with these to get an image similar in style to the images on the wikipedia page, however any different combination of RGB values will serve.

for(i=0;i<sandPileEdge;i++){

:for(j=0;j<sandPileEdge;j++){

::if (sandPile[i][j] == 0){

:::colour[0] = 0;

:::colour[1] = 0;

:::colour[2] = 0;

::} else if (sandPile[i][j] == 1){

:::colour[0] = 0;

:::colour[1] = 255;

:::colour[2] = 0;

::} else if (sandPile[i][j] == 2){

:::colour[0] = 255;

:::colour[1] = 0;

:::colour[2] = 255;

::} else if (sandPile[i][j] == 3){

:::colour[0] = 255;

:::colour[1] = 215;

:::colour[2] = 0;

::};

::fwrite(colour,1,3,fp);

:};

};

[[User:BlackHorse|BlackHorse]] ([[User talk:BlackHorse|talk]])