PImage img;
float a = 0.001;
int y = 0 ;
int y2;
int area = 100;
int start = -area;
void setup(){
img = loadImage("snj.jpg");
size(559,800);
image(img,0,0,width,height);
}
void draw(){
image(img,0,0,width,height);
int x = 0;
for(int i = 0 ; i < area ; i++ ){
y = start+i;
x += (i * i)*a;
if(x > width){
x = 0 + (width - x);}
copy(img,0,y,width,1,int(x),y,width,1);
copy(img,0,y,width,1,int(x)-width,y,width,1);
}
float x2 = x;
for(int i = -area ; i < 0 ; i++ ){
y2 = y + area + i;
x2 -= (i * i)*a;
if(x2 < 0){
x2 = 0 - x2;}
copy(img,0,y2,width,1,int(x2), y2,width,1);
copy(img,0,y2,width,1,int(x2)-width,y2,width,1);
}
start +=10;
if(start > height){
start = -area;
}
}
int型だからめんどくさい!