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| /**
*
* @author jdrigo
*
*/
public enum ImageFactory {
INSTANCE;
public BufferedImage readImage(String path) throws IOException {
return ImageIO.read(new File(path));
}
public BufferedImage readImage(URL url) throws IOException {
return ImageIO.read(url);
}
public BufferedImage createNoiseImage(int width, int height) {
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
double[][] noise = createNoise(width, height);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int g = (int) (256 * noise[x][y]);
Color color = new Color(g, g, g);
image.setRGB(x, y, color.getRGB());
}
}
return image;
}
public BufferedImage createClouds(int width, int height, int blue) {
if ( width<=0 || height<=0 ) throw new IllegalArgumentException("Size is out of range: " + width + " × " + height);
if ( blue<169 || blue>240 ) throw new IllegalArgumentException("Blue color is out of range: " + blue);
BufferedImage image = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);
double[][] noise = createNoise(width, height);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
int l = 192 + (int)(turbulence(x, y, 64, noise)) / 3;
if ( l>255 ) {
l=255;
}
Color color = HSLToRGB(blue, 255, l);
image.setRGB(x, y, color.getRGB());
}
}
return image;
}
public Color HSLToRGB(int h, int s, int l) {
return HSLToRGB(h, 100*s/255f, 100*(l/255f), 1f);
}
public Color HSLToRGB(float h, float s, float l) {
return HSLToRGB(h, s, l, 1f);
}
public Color HSLToRGB(float h, float s, float l, float alpha) {
if (s <0.0f || s > 100.0f) {
throw new IllegalArgumentException( "Color parameter outside of expected range - Saturation: " + s);
}
if (l <0.0f || l > 100.0f) {
throw new IllegalArgumentException( "Color parameter outside of expected range - Luminance: " + l );
}
if (alpha <0.0f || alpha > 1.0f) {
throw new IllegalArgumentException( "Color parameter outside of expected range - Alpha: " + alpha );
}
h = h % 360.0f;
h /= 360f;
s /= 100f;
l /= 100f;
float q = 0;
if (l < 0.5)
q = l * (1 + s);
else
q = (l + s) - (s * l);
float p = 2 * l - q;
float r = Math.max(0, HueToRGB(p, q, h + (1.0f / 3.0f)));
float g = Math.max(0, HueToRGB(p, q, h));
float b = Math.max(0, HueToRGB(p, q, h - (1.0f / 3.0f)));
r = Math.min(r, 1.0f);
g = Math.min(g, 1.0f);
b = Math.min(b, 1.0f);
return new Color(r, g, b, alpha);
}
private float HueToRGB(float p, float q, float h) {
if (h < 0) h += 1;
if (h > 1 ) h -= 1;
if (6 * h < 1)
{
return p + ((q - p) * 6 * h);
}
if (2 * h < 1 )
{
return q;
}
if (3 * h < 2)
{
return p + ( (q - p) * 6 * ((2.0f / 3.0f) - h) );
}
return p;
}
private double[][] createNoise(int width, int height) {
Random random = new Random();
double[][] noise = new double[width][height];
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
noise[x][y] = random.nextDouble();
}
}
return noise;
}
// zoom
private double smoothNoise(double x, double y, double[][] noise) {
int noiseWidth = noise.length;
int noiseHeight = noise[0].length;
// partie fractionnel
double fractX = x - (int) x;
double fractY = y - (int) y;
// bouclage
int x1 = ((int) x + noiseWidth) % noiseWidth;
int y1 = ((int) y + noiseHeight) % noiseHeight;
// valeurs voisines
int x2 = (x1 + noiseWidth - 1) % noiseWidth;
int y2 = (y1 + noiseHeight - 1) % noiseHeight;
// interpolation bilineaire
double value = 0.0;
value += fractX * fractY * noise[x1][y1];
value += fractX * (1 - fractY) * noise[x1][y2];
value += (1 - fractX) * fractY * noise[x2][y1];
value += (1 - fractX) * (1 - fractY) * noise[x2][y2];
return value;
}
private double turbulence(double x, double y, double size, double[][] noise) {
double value = 0.0, initialSize = size;
while (size >= 1) {
value += smoothNoise(x / size, y / size, noise) * size;
size /= 2.0;
}
return (128.0 * value / initialSize);
}
} |
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