Method ByteImage

src/org/opensourcephysics/display/ByteImage.java:80–111

Constructs ByteImage with the given data. @param data

(byte[][] data)

	 * @param data 
	 */
	public ByteImage(byte[][] data) {
	    byte [] reds = new byte[256];
	    byte [] greens = new byte[256];
	    byte [] blues = new byte[256];
	    for(int i = 0; i<256; i++) {
	      double x = (i<128) ? (i-100)/255.0 : -1;
	      double val = Math.exp(-x*x*8);
	      reds[i] = (byte) (255*val);
	      x = (i<128) ? i/255.0 : (255-i)/255.0;
	      val = Math.exp(-x*x*8);
	      greens[i] = (byte) (255*val);
	      x = (i<128) ? -1 : (i-156)/255.0;
	      val = Math.exp(-x*x*8);
	      blues[i] = (byte) (255*val);
	    }
	    ColorModel colorModel = new IndexColorModel(8, 256, reds, greens, blues);
		nrow = data.length;
		ncol = data[0].length;
		imagePixels = new byte[nrow * ncol];
		for (int i = 0; i < nrow; i++) {
			byte[] row = data[i];
			System.arraycopy(row, 0, imagePixels, i * ncol, ncol);
		}
		imageSource = new MemoryImageSource(ncol, nrow,colorModel, imagePixels, 0, ncol);
		imageSource.setAnimated(true);
		image = Toolkit.getDefaultToolkit().createImage(imageSource);
		dirtyImage=false;
		xmin = 0;
		xmax = ncol;
		ymin = nrow;
		ymax = 0; // zero is on top
	}
	
	/**
	 * Constructs IntegerImage with the given ColorModel and data.