torch [] t;
void setup(){
size (600,400);
t = new torch[500];
for (int i = 0; i < t.length/2; i++){
t[i] = new torch(random(width-2)+1,random(height-2)+1,int(random(4)),false);
}
for (int i = t.length/2; i < t.length; i++){
t[i] = new torch(random(width-2)+1,random(height-2)+1,int(random(4)),true);
}
background(150,0,0);
}
void loop(){
for (int i = 0; i < t.length; i++){
t[i].trace();
}
}
void mousePressed(){
background(150,0,0);
for (int i = 0; i < t.length; i++){
t[i].x = random(width-2)+1;
t[i].y = random(height-2)+1;
t[i].d = int(random(4));
}
}
class torch{
float x,y;
int d;
boolean light;
torch(float x, float y, int d, boolean light){
this.x = x;
this.y = y;
this.d = d;
this.light = light;
}
void trace(){
int xp = int(x);
int yp = int(y);
float c = green(pixels[xp + yp * width]);
if (light){
if (d == 2 && red(pixels[(xp - 1) + yp * width]) >= 10){x-=1;
}else if(d == 2 && red(pixels[(xp - 1) + yp * width]) < 10){d = (d+1)%4;}
if (d == 0 && red(pixels[(xp + 1) + yp * width]) >= 10){x+=1;
}else if(d == 0 && red(pixels[(xp + 1) + yp * width]) < 10){d = (d+1)%4;}
if (d == 3 && red(pixels[xp + (yp - 1) * width]) >= 10){y-=1;
}else if(d == 3 && red(pixels[xp + (yp - 1) * width]) < 10){d = (d+1)%4;}
if (d == 1 && red(pixels[xp + (yp + 1) * width]) >= 10){y+=1;
}else if(d == 1 && red(pixels[xp + (yp + 1) * width]) < 10){d = (d+1)%4;}
}else{
if (d == 2 && green(pixels[(xp - 1) + yp * width]) <= 245){x-=1;
}else if(d == 2 && green(pixels[(xp - 1) + yp * width]) > 245){d = (d+1)%4;}
if (d == 0 && green(pixels[(xp + 1) + yp * width]) <= 245){x+=1;
}else if(d == 0 && green(pixels[(xp + 1) + yp * width]) > 245){d = (d+1)%4;}
if (d == 3 && green(pixels[xp + (yp - 1) * width]) <= 245){y-=1;
}else if(d == 3 && green(pixels[xp + (yp - 1) * width]) > 245){d = (d+1)%4;}
if (d == 1 && green(pixels[xp + (yp + 1) * width]) <= 245){y+=1;
}else if(d == 1 && green(pixels[xp + (yp + 1) * width]) > 245){d = (d+1)%4;}
}
if (x > width - 2){x = 2;}
if (x < 2){x = width - 2;}
if (y > height - 2){y = 2;}
if (y < 2){y = height - 2;}
if (light){
stroke(9);
}else{
stroke(246);
}
point(x,y);
}
}