Generative Art #10

前に描いたサイコロ絵のカラフル版．こんな色のサイコロを見たことあったような無かったような…．

int N_SEPARATION = 2;

int[] di;
int[] dj;

color[][] dicePalettes;

void setup() {
 size(800, 800);
 
 dicePalettes = new color[][] {
   {color(255), color(0), color(255, 0, 0)},
   {color(0x19, 0x00, 0xB3), color(0xEA), color(0xEA)},
   {color(0xAD, 0x15, 0x00), color(0xEA), color(0xEA)},
   {color(0xFF, 0x9D, 0x05), color(0xEA), color(0xEA)},
 };
 
 init();
 noLoop();
}

void draw() {
 background(0);
 drawPattern();
}

void init() {
 // 上下左右のずれの系列をつくる
 // i: [-1, -1, 1, 1]
 // j: [-1, 1, -1, 1]
 di = new int[N_SEPARATION*N_SEPARATION];
 dj = new int[N_SEPARATION*N_SEPARATION];
 for (int i = 0; i < N_SEPARATION; i++) {
   for (int j = 0; j < N_SEPARATION; j++) {
     di[j + i * N_SEPARATION] = i;
     dj[j + i * N_SEPARATION] = j;
   }
 }
 
 // 中心化
 for (int k = 0; k < di.length; k++) {
   di[k] = di[k] - N_SEPARATION / 2;
   dj[k] = dj[k] - N_SEPARATION / 2;
 }
}

void drawPattern() {
 float sf = random(1.5, 2.0);
 float rot = TWO_PI / (int)random(1, 13);
 
 translate(width / 2.0, height / 2.0);
 scale(sf, sf);
 rotate(rot);
 
 recur(new PVector(0.0, 0.0), width, 0);
}

void recur(PVector p, float s, int d) {
 if (d > 1 && random(1) < float(d) / 3) {
   pushMatrix();
   float rot = HALF_PI * (int)random(0, 3);
   translate(p.x, p.y);
   rotate(rot);
   scale(s / (float)width, s / (float)height);
   drawDice((int)random(6)+1, dicePalettes[(int)random(dicePalettes.length)]);
   popMatrix();
 } else {
   float stepSize = s / (float)N_SEPARATION;
   for (int k = 0; k < N_SEPARATION*N_SEPARATION; k++) {
     PVector cp = new PVector(
       p.x + stepSize * dj[k] + (N_SEPARATION % 2 == 0 ? stepSize / 2.0 : 0),
       p.y + stepSize * di[k] + (N_SEPARATION % 2 == 0 ? stepSize / 2.0 : 0)
     );
     recur(cp, s / (float)N_SEPARATION, d + 1);
   }
 }
}

void drawDice(int number, color[] dicePalette) {
 int N = 100;
 float r = 100.0;
 
 noStroke();
 fill(dicePalette[0]);
 
 beginShape();
 for (int k = 0; k < N; k++) {
   float t = TWO_PI * k / (float)N;
   float x = r * cos(t);
   float y = r * sin(t);
   
   if (t < PI / 2.0) {
     x = x + (width / 2.0 - r);
     y = y + (height / 2.0 - r);
   } else if (t < PI) {
     x = x - (width / 2.0 - r);
     y = y + (height / 2.0 - r);
   } else if (t < PI * 3 / 2) {
     x = x - (width / 2.0 - r);
     y = y - (height / 2.0 - r);
   } else {
     x = x + (width / 2.0 - r);
     y = y - (height / 2.0 - r);
   }
   
   vertex(x, y);
 }
 endShape(CLOSE);
 
 if (number == 1) {
   fill(dicePalette[2]);
   circle(0, 0, width / 4.0);
 } else if (number == 2) {
   fill(dicePalette[1]);
   circle(width / 3.0, height / 3.0, width / 5.0);
   circle(-width / 3.0, -height / 3.0, width / 5.0);
 } else if (number == 3) {
   fill(dicePalette[1]);
   circle(width / 3.0, height / 3.0, width / 5.0);
   circle(0.0, 0.0, width / 5.0);
   circle(-width / 3.0, -height / 3.0, width / 5.0);
 } else if (number == 4) {
   fill(dicePalette[1]);
   circle(width / 3.0, height / 3.0, width / 5.0);
   circle(-width / 3.0, height / 3.0, width / 5.0);
   circle(width / 3.0, -height / 3.0, width / 5.0);
   circle(-width / 3.0, -height / 3.0, width / 5.0);
 } else if (number == 5) {
   fill(dicePalette[1]);
   circle(0.0, 0.0, width / 5.0);
   circle(width / 3.0, height / 3.0, width / 5.0);
   circle(-width / 3.0, height / 3.0, width / 5.0);
   circle(width / 3.0, -height / 3.0, width / 5.0);
   circle(-width / 3.0, -height / 3.0, width / 5.0);
 } else if (number == 6) {
   fill(dicePalette[1]);
   circle(width / 3.0, 0.0, width / 5.0);
   circle(-width / 3.0, 0.0, width / 5.0);
   circle(width / 3.0, height / 3.0, width / 5.0);
   circle(-width / 3.0, height / 3.0, width / 5.0);
   circle(width / 3.0, -height / 3.0, width / 5.0);
   circle(-width / 3.0, -height / 3.0, width / 5.0);
 }
}

static final String timestamp(final String name, final String ext) {
return name + "-" + year() + nf(month(), 2) + nf(day(), 2) +
  "-" + nf(hour(), 2) + nf(minute(), 2) + nf(second(), 2) + ext;
}

void mouseReleased() {
 N_SEPARATION = (int)random(2, 6);
 init();
 redraw();
}

void keyReleased() {
 saveFrame(String.format("frames/%s", timestamp("Project", ".png")));
}