回复：Processing中制作沙粒溶解动画：智慧从乌合之众中涌现

因为空格和缺失问题，让人蛋疼的放弃了好久，今天来看好像全搞定了

摸索了一下，照片还是不会，楼主更新照片啊

大神，，，请收下我的膝盖

我服了！

boolean jump; //一个让块的分割线在蓝线和绿线之间来回切换的参数
boolean p1,p2,p3,p4; //每个块内四个元胞的状态，p1代表左上，p2右上，p3左下，p4右下
Block quadCube; //后面写了一个类叫做Block，主要内容就是块内四个元胞如何根据现有的状态更新状态
boolean[]status=new boolean[4]; //建个数组储存四个元胞状态
PFont yahei; //声明字体
void setup(){
size(400,300);
background(0);
frameRate(30); //画布的帧率，通过这个参数可以控制坍塌的速度
yahei=createFont("MSYH.TTC",160);
//写这句之前你需要先在c盘font文件夹里找到雅黑字体并拖到当前代码窗口里
textFont(yahei); //使用字体
fill(255); //字体填充色
text("周国",50,200); //写字
}
void draw(){
if(jump==false){ //false时使用绿线的方法分割，true时使用蓝线方法切割
for(int i=0;i<width-1;i+=2){ //每一列
for(int j=0;j<height-1;j+=2){ //每一行
if(get(i,j)==color(255)){p1=true;}else{p1=false;} //根据每个像素点的颜色求得其状态
if(get(i+1,j)==color(255)){p2=true;}else{p2=false;}
if(get(i,j+1)==color(255)){p3=true;}else{p3=false;}
if(get(i+1,j+1)==color(255)){p4=true;}else{p4=false;}
quadCube=new Block(p1,p2,p3,p4); //四个状态导入到类里运算
status=quadCube.output(); //得到更新后的状态
if(status[0]==true){set(i,j,color(255));}else{set(i,j,color(0));} //根据状态给每个像素点上色
if(status[1]==true){set(i+1,j,color(255));}else{set(i+1,j,color(0));}
if(status[2]==true){set(i,j+1,color(255));}else{set(i,j+1,color(0));}
if(status[3]==true){set(i+1,j+1,color(255));}else{set(i+1,j+1,color(0));}
}
}
jump=true; //切换下状态，下一帧里按照蓝线切割了
}else{
//按照蓝线切割
for(int i=1;i<width-1;i+=2){ //每一列
for(int j=1;j<height-1;j+=2){ //每一行
if(get(i,j)==color(255)){p1=true;}else{p1=false;}
if(get(i+1,j)==color(255)){p2=true;}else{p2=false;}
if(get(i,j+1)==color(255)){p3=true;}else{p3=false;}
if(get(i+1,j+1)==color(255)){p4=true;}else{p4=false;}
quadCube=new Block(p1,p2,p3,p4);
status=quadCube.output();
if(status[0]==true){set(i,j,color(255));}else{set(i,j,color(0));}
if(status[1]==true){set(i+1,j,color(255));}else{set(i+1,j,color(0));}
if(status[2]==true){set(i,j+1,color(255));}else{set(i,j+1,color(0));}
if(status[3]==true){set(i+1,j+1,color(255));}else{set(i+1,j+1,color(0));}
}
}
jump=false; //切换回绿线
}
}
//下面是专门计算状态的类，看着挺长，实际上就是用if 和 else if对上面那个沙堆规则图进行了代码化表达
class Block {
boolean s1, s2, s3, s4;
float possibility=35f; //这里的f是用来声明35是个浮点数而不是整数，有35的概率“阻塞”
boolean result[]=new boolean[4];
Block(boolean i1, boolean i2, boolean i3,boolean i4) {
if(i1==false && i2==false && i3==false &&i4==false) {
s1=false;
s2=false;
s3=false;
s4=false;
}
else if(i3==true && i4==true) {
s1=i1;
s2=i2;
s3=i3;
s4=i4;
}
else if(i1==true && i2==true && i3==false &&i4==true) {
s1=false;
s2=true;
s3=true;
s4=true;
}
else if(i1==true && i2==true && i3==true &&i4==false) {
s1=true;
s2=false;
s3=true;
s4=true;
}
else if(i1==true && i2==false && i3==true &&i4==false) {
s1=false;
s2=false;
s3=true;
s4=true;
}
else if(i1==false && i2==true && i3==false &&i4==true) {
s1=false;
s2=false;
s3=true;
s4=true;
}
else if(i1==true && i2==true && i3==false &&i4==false) {
float odd=random(100);
if (odd<possibility){
s1=true;
s2=true;
s3=false;
s4=false;
}
else {
s1=false;
s2=false;
s3=true;
s4=true;
}
}
else if(i1==true) {
s1=false;
s2=false;
s3=true;
s4=false;
}
else if(i2==true) {
s1=false;
s2=false;
s3=false;
s4=true;
}
else {
s1=i1;
s2=i2;
s3=i3;
s4=i4;
}
}
boolean[] output() { //这里返回数组的写法要多留心下，我写错了好多回
boolean[]result= {
s1, s2, s3, s4
};
return result;
}
}

能再发一些吗

多谢楼主分享的思路和心得。
刚开始学习processing，还在摸索中，真的很强大。代码可以写的很简洁，比自己用java写高效太多了。
贴个图片的沙粒效果代码
PImage realImage;
PImage greyImage;
int width;
int height;
boolean shift=false;
color backgroundColor;
color greyBgColor;
void setup() {
size(400,400);
//surface.setResizable(true);
realImage = loadImage("sand.jpg");
width = realImage.width;
height = realImage.height;
surface.setSize(width,height);
background(255);
colorMode(HSB);
greyImage = realImage.copy();
//try various threshold for different pictures
greyImage.filter(THRESHOLD,0.5);
//assume the upleft point is background
backgroundColor = realImage.get(0,0);
//println("HSB of background color: "+hue(backgroundColor) + "," + saturation(backgroundColor) + "," + brightness(backgroundColor));
greyBgColor = greyImage.get(0,0);
//println("HSB of grey background color "+hue(greyBgColor) + "," + saturation(greyBgColor) + "," + brightness(greyBgColor));
}
void draw() {
image(realImage,0,0);
process(shift);
shift = !shift;
}
void process(boolean shift) {
int offset = shift?1:0;
Block block;
for(int i=offset;i<width-1;i+=2) {
for(int j=offset;j<height-1;j+=2) {
block = new Block(greyImage.get(i,j),greyImage.get(i+1,j),greyImage.get(i,j+1),greyImage.get(i+1,j+1));
block.move();
if(block.upLeftDrop) {
greyImage.set(i,j+1,greyImage.get(i,j));
greyImage.set(i,j,greyBgColor);
realImage.set(i,j+1,realImage.get(i,j));
realImage.set(i,j,backgroundColor);
}
if(block.upRightDrop) {
greyImage.set(i+1,j+1,greyImage.get(i+1,j));
greyImage.set(i+1,j,greyBgColor);
realImage.set(i+1,j+1,realImage.get(i+1,j));
realImage.set(i+1,j,backgroundColor);
}
}
}
}
class Block {
color upLeft;
color upRight;
color downLeft;
color downRight;
boolean upLeftDrop;
boolean upRightDrop;
Block(color upLeft,color upRight,color downLeft,color downRight) {
this.upLeft = upLeft;
this.upRight = upRight;
this.downLeft = downLeft;
this.downRight = downRight;
//println("color: " + brightness(upLeft)+"," + brightness(upRight)+"," + brightness(downLeft)+"," + brightness(downRight)+")");
}
void move() {
if(isAvailable(this.downLeft) && isAvailable(this.downRight)) {
return;
}
else if((!isAvailable(this.downLeft) && !isAvailable(this.downRight)) &&
(isAvailable(this.upLeft) && isAvailable(this.upRight))) {
if(random(1) > 0.5) {
return;
}
else {
upLeftDrop = true;
upRightDrop = true;
return;
}
}
if(!isAvailable(this.downLeft)) {
if(isAvailable(this.upLeft)) {
upLeftDrop = true;
}
else if(isAvailable(this.upRight) && isAvailable(this.downRight)) {
upRightDrop = true;
}
}
if(!isAvailable(this.downRight)) {
if(isAvailable(this.upRight)) {
upRightDrop = true;
}
else if(isAvailable(this.upLeft) && isAvailable(this.downLeft)) {
upLeftDrop = true;
}
}
}
boolean isAvailable(color point) {//should change according to different picture
//println("point="+saturation(point)+","+brightness(point)+";"+(saturation(point) == 0 && brightness(point) == 0));
return point != greyBgColor;
}
}