Information Fragments - jMonkeyEngine 3.0 - page 510

The ImageGenerator class
The ImageGenerator class is used in the Using noise to generate a terrain recipe of
Chapter 3 , World Building . The code to create this class is as follows:
public class ImageGenerator {
public static void generateImage(float[][] terrain){
int size = terrain.length;
int grey;
BufferedImage img = new BufferedImage(size, size,
BufferedImage.TYPE_INT_RGB);
for(int y = 0; y < size; y++){
for(int x = 0; x < size; x++){
double result = terrain[x][y];
grey = (int) (result * 255);
int color = (grey << 16) | (grey << 8) | grey;
img.setRGB(x, y, color);
}
}
try {
ImageIO.write(img, "png", new File("assets/Textures/
heightmap.png"));
} catch (IOException ex) {
Logger.getLogger(NoiseMapGenerator.class.getName()).log(Level.SEVERE,
null, ex);
}
}
}