title: Processing精彩例程之细胞自动机

date: 2018-3-25 22:19:41

categories: 编程与生活

tags: Java

一维细胞自动机

一维细胞自动机

int [] rules = { 0, 0, 0, 1, 1, 1, 1, 0}; // 生成一维规则

int gen = 1; // 回合数，等于当前y轴位置加一

color on = color(255); // 设定状态 on 为白色

color off = color(0); // 设定状态 off 为黑色

void setup() { // 入口函数初始化参数

size(1001, 501);

frameRate(8); // 设定较低的帧率

background(0); // 黑色背景

set(width/2, 0, on); // 设定初始状态

}

void draw() {

for (int i = 1; i < width - 1; i++) {

// 生成循环

int left = get(i - 1, gen - 1);

int me = get(i, gen - 1);

int right = get(i + 1, gen - 1);

// 规则生效

if (rules(left, me, right) == 1) {

set(i, gen, on);

}

}

gen++;

if (gen > height - 1) {

noLoop();

save("CA.png");

}

}

int rules (color a, color b, color c) {

// 规则

if ((a == on) && (b == on) && (c == on)) {return rules[0];}

else if ((a == on) && (b == on) && (c == off)) {return rules[1];}

else if ((a == on) && (b == off) && (c == on)) {return rules[2];}

else if ((a == on) && (b == off) && (c == off)) {return rules[3];}

else if ((a == off) && (b == on) && (c == on)) {return rules[4];}

else if ((a == off) && (b == on) && (c == off)) {return rules[5];}

else if ((a == off) && (b == off) && (c == on)) {return rules[6];}

else if ((a == off) && (b == off) && (c == off)) {return rules[7];}

return 0;

}

二维细胞自动机

二维细胞自动机

需要gif相关的库——gifAnimation。

import gifAnimation.*;

GifMaker gifExport; // 声明对象

int [][] grid, futureGrid;

void setup() {

size(940, 500);

frameRate(8);

grid = new int [width][height]; // 目前的图像像素数组

futureGrid = new int [width][height]; // 下一刻状态数组

// 设定初始状态

float density = 0.3 * width * height;

for (int i = 0; i < density; i++) {

grid[int(random(width))][int(random(height))] = 1;

}

background(0);

// 设定gif导出相关参数

gifExport = new GifMaker(this, "2D_CA.gif");

gifExport.setRepeat(0); // make it an "endless" animation

gifExport.setTransparent(0,0,0); // black is transparent

}

void draw() {

for (int x = 1; x < width - 1; x++) {

for (int y = 1; y < height - 1; y++) {

// “活着的”相邻细胞数目

int nb = neighbors(x, y);

if ((grid[x][y] == 1) && (nb < 2)) {

futureGrid[x][y] = 0;

set(x, y, color(0));

} else if ((grid[x][y] == 1) && (nb > 3)) {

futureGrid[x][y] = 0;

set(x, y, color(0));

} else if ((grid[x][y] == 0) && (nb == 3)) {

futureGrid[x][y] = 1;

set(x, y, color(255));

} else {

futureGrid[x][y] = grid[x][y];

}

}

}

int [][] temp = grid;

grid = futureGrid;

futureGrid = temp;

gifExport.setDelay(1);

gifExport.addFrame();

}

// 统计“活着的”相邻细胞数目

//int neighbors (int x, int y) {

// return grid[x][y-1] +

// grid[x+1][y-1] +

// grid[x+1][y] +

// grid[x+1][y+1] +

// grid[x][y+1] +

// grid[x-1][y+1] +

// grid[x-1][y] +

// grid[x-1][y-1];

//}

// 改进的neighbors()

int neighbors (int x, int y) {

int north = (y + height - 1) % height;

int south = (y + 1) % height;

int east = (x + 1) % width;

int west = (x + width - 1) % width;

return grid[x][north] +

grid[east][north] +

grid[east][y] +

grid[east][south] +

grid[x][south] +

grid[west][south] +

grid[west][y] +

grid[west][north];

}

void mousePressed() {

gifExport.finish(); // write file

noLoop();

}