Drawing a chessboard using ImageJ array

My chessboard series continues with a new script based on arrays and how we can use them in ImageJ.



In this algorithm , a stack of 64 slices is created and then displayed as a montage of 8 rows and 8 columns with the function makeMontage (in Image > Stacks > Make Montage).
Each slice of the stack (corresponding to a cell of the chessboard) must be colored in black or white. The colors are stored in an array created with the built-in function newArray(...). Instead of storing the colors (0 and 255), I use 0 for black and 1 for white color (lines 10-19 of the following script).
The main algorithm consists of a loop for scanning the whole cells array. The value is multiplied by 255 and used by the setColor(...) function. Finally, a black (or white) rectangle is drawn (fillRect(...) function ) in the ith slice (setSlice(index+1) ).

+++ IJ snippet

	//
	// Chessboard using ImageJ array
	// Jean-Christophe Taveau
	// http://crazybiocomputing.blogspot.com
	//
	chessSize=256;
	wcell= chessSize/8;
	cells=newArray(
	1,0,1,0,1,0,1,0,
	0,1,0,1,0,1,0,1,
	1,0,1,0,1,0,1,0,
	0,1,0,1,0,1,0,1,
	1,0,1,0,1,0,1,0,
	0,1,0,1,0,1,0,1,
	1,0,1,0,1,0,1,0,
	0,1,0,1,0,1,0,1
	);
	// M A I N
	newImage("cellStack", "8-bit Black", wcell, wcell, cells.length);
	for (index=0;index<cells.length;index++)
	{
	setSlice(index+1);
	color=cells[index]*255;
	setColor(color,color,color);
	fillRect(0,0,wcell,wcell);
	}
	run("Make Montage...", "columns=8 rows=8 scale=1 first=1 last=64 increment=1 border=0 font=12");
	exit();

view raw gistfile1.js hosted with ❤ by GitHub

+++ end of IJ snippet