沙画效果实现

沙画实现原理

将窗体分为若干个1x1的像素点

将相邻的4个像素点进行考虑上下2个沙粒的下落情况

可以分成2* 2* 2 *2=16中情况，但是真正有意义的情况只有9种

用一个二维数组存放每个像素点的沙粒情况，0为无沙粒，其他情况为有沙粒

另外，沙画初始形状可以随机，也可以运用分形建造

从（0，0）点开始遍历，改变沙粒情况，下一次从（1，1）点开始这样的沙画就可以动起来了

    	//沙画进行
    	for(int k=0;;k++){//形成动画效果
    		
    		//清除
    		bufferGraphics.setColor(BG_COLOR);
    		bufferGraphics.fillRect(0, 0, 800, 600);
    		
    		//i在0和1之间循环赋值
    		for(int i = k;i+1<data.length;i+=1){
    			
    			for(int j = k;j+1<data[i].length;j+=1){
    				
    				int p = r.nextInt(2);
    				if(data[i][j]!=0&&data[i+1][j]==0&&data[i][j+1]==0&&data[i+1][j+1]==0){
    					//只有左上
    					data[i][j]=0;
    					data[i][j+1]=1;
    				} else if(data[i][j]==0&&data[i+1][j]!=0&&data[i][j+1]==0&&data[i+1][j+1]==0){
    					//只有右上
    					data[i+1][j]=0;
    					data[i+1][j+1]=1;
    				} else if(data[i][j]==0&&data[i+1][j]!=0&&data[i][j+1]==0&&data[i+1][j+1]!=0){
    					//右边两个
    					data[i+1][j]=0;
    					data[i][j+1]=1;
    				} else if(data[i][j]!=0&&data[i+1][j]==0&&data[i][j+1]!=0&&data[i+1][j+1]==0){
    					//左边两个
    					data[i+1][j+1]=1;
    					data[i][j]=0;
    				} else if(data[i][j]!=0&&data[i+1][j]!=0&&data[i][j+1]!=0&&data[i+1][j+1]==0){
    					//左三角
    					data[i+1][j]=0;
    					data[i+1][j+1]=1;
    				} else if(data[i][j]!=0&&data[i+1][j]!=0&&data[i][j+1]==0&&data[i+1][j+1]!=0){
    					//右三角
    					data[i][j]=0;
    					data[i][j+1]=1;
    				} else if(data[i][j]==0&&data[i+1][j]!=0&&data[i][j+1]!=0&&data[i+1][j+1]==0){
    					//副对角线
    					data[i+1][j]=0;
    					data[i+1][j+1]=1;
    				} else if(data[i][j]!=0&&data[i+1][j]==0&&data[i][j+1]==0&&data[i+1][j+1]!=0){
    					//主对角线
    					data[i][j]=0;
    					data[i][j+1]=1;
    				} else if(data[i][j]!=0&&data[i+1][j]!=0&&data[i][j+1]==0&&data[i+1][j+1]==0){
    					//上面两个
    					if(p==1){
    						data[i][j]=0;
        					data[i][j+1]=1;
    					} else if(p==0){
    						data[i+1][j]=0;
        					data[i+1][j+1]=1;
    					}
    				}	
    				
    			}
    				
    		}
    		//绘制数组
    		showArr(bufferGraphics,data);
    		//绘制缓存到界面上
    		g.drawImage(buffer, 0, 0, null);
				
    		if(k==1)
    			k=0;

    	}

本文地址：https://blog.csdn.net/llplllll/article/details/107289976