FileDocCategorySizeDatePackage
Atom.javaAPI DocExample2302Sat Apr 23 22:35:42 BST 2005magicbeans.sunw.demo.molecule

Atom

public class Atom extends Object

Fields Summary
private static Component
panel
private static byte[]
data
private static final int
R
private static final int
hx
private static final int
hy
private static final int
bgGrey
private static final int
nBalls
private static int
maxr
private int
Rl
private int
Gl
private int
Bl
private Image[]
balls
Constructors Summary
Atom(int Rl, int Gl, int Bl)

	this.Rl = Rl;
	this.Gl = Gl;
	this.Bl = Bl;
Methods Summary
private synchronized voidSetup()

	balls = new Image[nBalls];
	byte red[] = new byte[256];
	red[0] = (byte) bgGrey;
	byte green[] = new byte[256];
	green[0] = (byte) bgGrey;
	byte blue[] = new byte[256];
	blue[0] = (byte) bgGrey;
	for (int r = 0; r < nBalls; r++) {
	    float b = (float) (r+1) / nBalls;
	    for (int i = maxr; i >= 1; --i) {
		float d = (float) i / maxr;
		red[i] = (byte) blend(blend(Rl, 255, d), bgGrey, b);
		green[i] = (byte) blend(blend(Gl, 255, d), bgGrey, b);
		blue[i] = (byte) blend(blend(Bl, 255, d), bgGrey, b);
	    }
	    IndexColorModel model = new IndexColorModel(8, maxr + 1,
							red, green, blue, 0);
	    balls[r] = panel.createImage(
		new MemoryImageSource(R*2, R*2, model, data, 0, R*2));
	}
private final intblend(int fg, int bg, float fgfactor)

	return (int) (bg + (fg - bg) * fgfactor);
synchronized voidpaint(java.awt.Graphics gc, int x, int y, int radius)

	if (balls == null) {
	    Setup();
	}
	Image i = balls[radius];
	int size = 10 + radius;
	gc.drawImage(i, x - (size/2), y - (size/2), size, size, panel);
static voidsetComponent(java.awt.Component app)


     
	data = new byte[R * 2 * R * 2];
	int mr = 0;
	for (int Y = 2 * R; --Y >= 0;) {
	    int x0 = (int) (Math.sqrt(R * R - (Y - R) * (Y - R)) + 0.5);
	    int p = Y * (R * 2) + R - x0;
	    for (int X = -x0; X < x0; X++) {
		int x = X + hx;
		int y = Y - R + hy;
		int r = (int) (Math.sqrt(x * x + y * y) + 0.5);
		if (r > mr)
		    mr = r;
		data[p++] = r <= 0 ? 1 : (byte) r;
	    }
	}
	maxr = mr;
    
	panel = app;