int XSIZE = 600; 
int YSIZE = 600; 

int MaxColors = 256; 
float [][]clr; 


void LUT() {
 float freq_r = 0.5;
 float freq_g = 0.5;
 float freq_b = .99;
 float amp_r = 1.0; 
 float amp_g = 1.7; 
 float amp_b = 1.0; 

 clr = new float[3][MaxColors]; //initialize clr

 for (int x=0;x<MaxColors;x++) {
   clr[0][x] = 0; 
   clr[1][x] = x;  
   clr[2][x] = 255-x; 
 }
}

void setup() {
 size(XSIZE,YSIZE);
 background(0); 
 LUT(); 
 CreateImage();
}

void CreateImage() {
 float xfreq = 3; 
 float yfreq = 4; 
 float amp = 256/2;
 
 for (int y=1;y<YSIZE;y++) {
 
   for (int x=1;x<XSIZE;x++) {
 
     float i = PI*x*xfreq/XSIZE;
     float j = PI*y*yfreq/YSIZE;
 
   float a = (sin(tan(j)*tan(i))*cos((i))*256)+amp;  
         
    if (a > 255) a = 255;
    else if (a < 0) a = 0;

     color c = color(clr[0][int(a)],clr[1][int(a)],clr[2][int(a)]);
     set(x,y,c);
   }
 }

 saveFrame("mbsine.tiff");
}