public BufferedImage filter(BufferedImage src, BufferedImage dst) {
if (dst == null) dst = createCompatibleDestImage(src, null);
int width = src.getWidth();
int height = src.getHeight();
int numScratches = (int) (density * width * height / 100);
ArrayList<Line2D> lines = new ArrayList<Line2D>();
{
float l = length * width;
Random random = new Random(seed);
Graphics2D g = dst.createGraphics();
g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g.setColor(new Color(color));
g.setStroke(new BasicStroke(this.width));
for (int i = 0; i < numScratches; i++) {
float x = width * random.nextFloat();
float y = height * random.nextFloat();
float a = angle + ImageMath.TWO_PI * (angleVariation * (random.nextFloat() - 0.5f));
float s = (float) Math.sin(a) * l;
float c = (float) Math.cos(a) * l;
float x1 = x - c;
float y1 = y - s;
float x2 = x + c;
float y2 = y + s;
g.drawLine((int) x1, (int) y1, (int) x2, (int) y2);
lines.add(new Line2D.Float(x1, y1, x2, y2));
}
g.dispose();
}
if (false) {
// int[] inPixels = getRGB( src, 0, 0, width, height, null );
int[] inPixels = new int[width * height];
int index = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
float sx = x, sy = y;
for (int i = 0; i < numScratches; i++) {
Line2D.Float l = (Line2D.Float) lines.get(i);
float dot = (l.x2 - l.x1) * (sx - l.x1) + (l.y2 - l.y1) * (sy - l.y1);
if (dot > 0) inPixels[index] |= (1 << i);
}
index++;
}
}
Colormap colormap = new LinearColormap();
index = 0;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
float f = (float) (inPixels[index] & 0x7fffffff) / 0x7fffffff;
inPixels[index] = colormap.getColor(f);
index++;
}
}
setRGB(dst, 0, 0, width, height, inPixels);
}
return dst;
}
public void setRandom(Random random)
/* Sets all the scalars in 'this' to random values uniformly distributed
* over (0.0, 1.0) using the pseudo-random generator 'random'. */
{
// setZero();
for (int k = 0; k < size; ++k) f[k] = random.nextFloat();
}
public ScalarImage(int width, int height, Random random)
/* Constructs a new ScalarImage = < width, height, zero-buffer > */
{
this.width = width;
this.height = height;
size = width * height;
f = new float[size];
offset = new int[height];
for (int j = 0; j < height; ++j) offset[j] = width * j;
for (int k = 0; k < size; ++k) f[k] = random.nextFloat();
}