Here is the definitive version. I tried to use saveJSONObject and loadJSONObject instead of binary files, but I have found no documentation about hiw to check for existence of JSON files.
/* Invasión de copos de nieve */
/* José G. Moya Yangüela - Demasiado tarde para la edición de navidad--- */
/* Pero lo vamos a intentar... */
import android.app.WallpaperManager.*;
int modo=1;
int fps=10;
int coposMax=255;
float btnleft,btntop,btnright,btnbottom;
float centerx;
float centery;
float angle[];
Copo copos[];
Boton botones[];
byte configuration[]={byte(coposMax),byte(fps)};
byte conf2[];
boolean isPre=false;
String filename="configuration.dat";
void setup (){
if ((conf2=loadBytes(filename))
==null){
/* do nothing */
} else {
configuration=conf2;
coposMax=int(configuration[0]);
fps=int(configuration[1]);
}
isPre=wallpaperPreview();
centerx=width/2;
centery =height/2;
copos=new Copo[0];
colorMode(HSB);
frameRate(fps);
btnleft=0;
btntop=0;
btnright=0;
btnbottom=0;
}
void draw (){
background(0);
switch (modo) {
case 2: drawmenu();
case 1:
default: drawcopo();
}
}
void drawcopo(){
int f;
if (copos.length<coposMax){
copos=(Copo[]) append(copos,new Copo(random(width),random(height),random(50)));
}
for (f=0;f<copos.length;f++){
/**/ copos[f].moverx(int((copos[f].lenmax/4)*cos(frameCount*PI/90)));
copos[f].movery(int(abs(
(copos[f].lenmax/4)
*sin(frameCount*PI/90)
)
));
/* */
copos[f].dibujar();
copos[f].colorB--;
if (copos[f].colorB<=0) {
copos[f]=copos[copos.length-1];
copos[copos.length-1]=new Copo(random(width),random(height),random(50));
}
}
/* DEBUG START */
/* text (
str(wallpaperPreview())+" "+ str(isPre),
width/2,
height/2
);
*/
/* DEBUG END */
if (modo==1 && isPre){
menu();
}
}
class Copo{
int colorH;
int colorS;
int colorB;
float cx;
float cy;
float lenmax;
void moverx(int dx){
this.cx+=dx;
}
void movery(int dy){
this.cy+=dy;
}
int len[]={4,4,4,4};
Copo(float icx,float icy,float ilenmax){
this.colorH=int(random(255));
this.colorS=int(random(255));
this.colorB=200;
this.cx=icx;
this.cy=icy;
this.lenmax=ilenmax;
int lenacum=0;
lenacum =0;
int l;
for (l=0;l <4;l++){
this.len [l]=int(random(0,this.lenmax-lenacum));
lenacum+=len [l];
}
}
void dibujar(){
stroke(color(this.colorH,this.colorS,this.colorB));
float angle;
for(angle=0;angle<2*PI;angle+=PI/3){
line (this.cx,this.cy,this.cx+this.lenmax*cos (angle),this.cy+this.lenmax*sin (angle));
this.brazo (this.cx,this.cy,angle,1);
}
}
void brazo (float bx,float by,float angle,int nivel){
line (bx, by, bx+len[nivel]*cos(angle-PI/6), by+len[nivel]*sin(angle-PI/6));
if (nivel <3){
this.brazo(bx+len[nivel]*cos(angle-PI/6), by+len[nivel]*sin(angle-PI/6), (angle-PI/6),nivel+1 );
}
line (bx, by, bx+len[nivel]*cos(angle+PI/6), by+len [nivel]*sin(angle+PI/6));
if (nivel <3){
this.brazo(bx + len[nivel]*cos(angle+PI/6), by+len[nivel]*sin(angle+PI/6), (angle+PI/6), nivel+1 );
}
}
}
class Boton {
public float cx;
public float cy;
public float radius;
public String texto;
public int code;
Boton(String btext, float bx, float by, float bradius, int bcode){
pushStyle();
noFill();
stroke(255);
this.cx=bx;
this.cy=by;
this.radius=bradius;
this.texto=btext;
this.code=bcode;
ellipseMode(RADIUS);
ellipse(this.cx, this.cy, this.radius, this.radius);
fill(255);
textAlign(CENTER, CENTER);
text(this.texto,cx,cy);
popStyle();
}
public boolean check( float xt,float yt){
if ( dist(xt, yt, this.cx, this.cy)< this.radius){
return true;
}
return false;
}
}
void menu(){
fill(255);
textAlign(RIGHT);
textSize(24*displayDensity);
text("Administrar",width,height-150);
btnleft=width-textWidth("Administrar");
btntop=height-(textAscent()+150);
btnright=width;
btnbottom=height+textDescent()-150;
rectMode(CORNERS);
noFill(); stroke(255);
rect(btnleft, btntop,btnright,btnbottom);
};
void drawmenu(){
pushStyle();
fill(255);
textAlign(RIGHT);
textSize(24*displayDensity);
text("Volver",width,height-150);
btnleft=width-textWidth("Volver");
btntop=height-(textAscent()+150);
btnright=width;
btnbottom=height+textDescent()-150;
rectMode(CORNERS);
noFill(); stroke(255);
rect(btnleft, btntop,btnright,btnbottom);
textAlign(CENTER,CENTER);
text("Max FPS: "+str(fps), width/2, height/4);
text("Real FPS: "+str(round(frameRate*10)/10), width/2, height/4+textAscent()+textDescent());
text("Copos (Flakes): "+str(coposMax), width/2, height/2);
noFill();
botones=new Boton[] {
new Boton("-",2*textAscent(), height/4, textAscent(), 1),
new Boton("+",width-2*textAscent(), height/4, textAscent(), 2),
new Boton("-",2*textAscent(), height/2, textAscent(), 3),
new Boton("+",width-2*textAscent(), height/2, textAscent(), 4),
};
ellipseMode(RADIUS);
ellipse(2*textAscent(),height/4,textAscent(),textAscent());
text("-",2*textAscent(),height/4);
popStyle();
}
void mousePressed(){
if (isPre==false) return;
if (modo==2) {
int code=-1;
for (int f=0; f<botones.length; f++){
if (botones[f].check(mouseX,mouseY)){
code=botones[f].code;
break;
}
}
if (code>=0){
switch(code){
case 1:
fps=max(5, fps-5);
frameRate(fps);
break;
case 2:
fps=min(30,fps+5);
frameRate(fps);
break;
case 3:
coposMax=max(15,coposMax-16);
copos=(Copo[]) subset(copos,0,min(copos.length,coposMax));
break;
case 4:
coposMax=min(255,coposMax+16);
break;
}
configuration[0]=byte (coposMax);
configuration[1]=byte (fps);
saveBytes(filename,configuration);
}
}
if (mouseX>=btnleft && mouseX <= (btnright)){
if (mouseY>= btntop && mouseY<= (btnbottom)) {
modo=(modo==2) ? 1 :2;
}
}
}
When run in preview, you can choose number of flakes and max fps, and this setting will be saved for your screensaver.
(This code is based on a script I originally uploaded to MedialabPrado #programalaplaza )
