Hi, I wanted to make a code where an Object appears when you press the mouse, which works out fine. But if you press again it should disappear again. Also I have two Objects, and it should always be one that appears. Which one appears is random. But I have no idea how to even start. No matter what I tried if I press again it doesn’t disappear. And how do I set it to random?
Id appreciate some help:)
Make a variable for each shape.
boolean, when it’s true display the shape otherwise don’t. Use if(shape1IsOn) … in draw()
Now in the mousePressed() function switch it to true when false and vice versa
Here you can make a random to decide which one of the 2 variables you change:
if(random (100)>50) {…} else {…}
Remark
You need setup and draw and at the start of draw background (0); or so
Full Sketch
boolean b1=true, b2=true;
void setup() {
size(700, 600);
}
void draw() {
background(0);
if (b1)
rect(10, 10, 111, 111);
if (b2)
ellipse (202, 210, 111, 111);
}
void mousePressed() {
if (random(1)<0.5)
b1=!b1;
else
b2=!b2;
}
Present present;
Tree tree;
boolean appear;
void setup () {
size (1000, 900);
background (0);
textAlign(CENTER);
present = new Present ();
tree = new Tree ();
}
void draw () {
drawAdvent ();
drawObjects();
}
void drawAdvent () {
float x = 15;
float y = 15;
for (int j = 50; j < height; j += 210) {
for (int i = 20; i < width; i += 165) {
fill(20, 50, 150);
rect(x + i, y + j, 100, 150);
for (int t = 1; t<25; t++) {
fill(70, 220, 240);
textSize(50);
text(t, x+i+50, y+j +85);
}
}
}
}
void drawObjects () {
if (mousePressed) {
appear = true;
} else {
appear = false;
}
if (appear == true) {
present.draw();
}
}
class Present extends christmasObject {
void draw () {
translate (b, h);
drawpresent();
}
void drawpresent() {
scale(0.1);
beginShape();
fill(30, 70, 20);
rect( 150, 400, 500, 400);
rect ( 125, 350, 550, 100);
fill(250, 10, 10);
triangle(400, 340, 300, 200, 225, 300);
triangle(400, 340, 500, 200, 575, 300);
ellipse (400, 340, 70, 50);
rect ( 340, 350, 125, 450);
endShape();
}
}
class Tree extends christmasObject {
void draw () {
drawtree();
}
void drawtree () {
translate(b, h);
scale(0.2);
beginShape();
//stem
rectMode(CENTER);
fill(90, 50, 20);
rect(500, 850, 80, 120);
//Bottom
fill(0, 50, 0);
triangle(500, 500, 200, 800, 800, 800);
//Middle
fill(0, 60, 0);
triangle(500, 300, 300, 600, 700, 600);
//Top
fill(0, 70, 0);
triangle(500, 200, 400, 400, 600, 400);
endShape();
}
}
class christmasObject {
float b;;
float h;
void setup () {
b = mouseX;
h = mouseY;
}
void draw () {
}
}
This is my Code so far but I am so lost right now. Its supposed to be a little Advent Calendar for fun.
But the present Always appears at the same position and I don’t really understand how I should add what you suggested 
Also lets not talk about my numbers on the doors I still gotta figure that out too haha
without looking at your code I posted an example above
Now I look at your code…
here is an example.
Instead of using mousePressed as a variable in draw() I use the function
mousePressed().
Here I change b,h (normally x,y) and the boolean appearPresent OR appearTree
Remark
also when using translate or scale we want to use pushMatrix and popMatrix to isolate it. Otherwise hey add up.
Full Sketch
Present present;
Tree tree;
boolean appearPresent=true;
boolean appearTree=true;
void setup () {
size (1000, 900);
background (0);
textAlign(CENTER);
present = new Present ();
tree = new Tree ();
}
void draw () {
background (0);
drawAdvent ();
drawObjects();
}
//---------------------------------------------------------------------------
void drawAdvent () {
float x = 15;
float y = 15;
int dayNumber=1;
for (int j = 50; j < height; j += 210) {
for (int i = 20; i < width; i += 165) {
fill(20, 50, 150);
rect(x + i, y + j, 100, 150);
// for (int t = 1; t<13; t++) {
fill(70, 220, 240);
textSize(50);
text(dayNumber, x+i+50, y+j +85);
// }
dayNumber++;
}
}
}// func
void drawObjects () {
if (appearPresent) {
present.draw();
}
if (appearTree) {
tree.draw();
}
}
void mousePressed() {
if (random(1)<0.5) {
appearPresent = ! appearPresent;
present.b=random(width-50);
present.h=random(height-50);
} else {
appearTree = ! appearTree;
tree.b=random(width-50);
tree.h=random(height-50);
}
}
//===
class Present extends christmasObject {
void draw () {
drawpresent();
}
void drawpresent() {
pushMatrix();
translate (b, h);
scale(0.1);
beginShape();
fill(30, 70, 20);
rect( 150, 400, 500, 400);
rect ( 125, 350, 550, 100);
fill(250, 10, 10);
triangle(400, 340, 300, 200, 225, 300);
triangle(400, 340, 500, 200, 575, 300);
ellipse (400, 340, 70, 50);
rect ( 340, 350, 125, 450);
endShape();
popMatrix();
}//method
}//class
//=====
class Tree extends christmasObject {
void draw () {
drawtree();
}
void drawtree () {
pushMatrix();
translate(b, h);
scale(0.2);
beginShape();
//stem
rectMode(CENTER);
fill(90, 50, 20);
rect(500, 850, 80, 120);
//Bottom
fill(0, 50, 0);
triangle(500, 500, 200, 800, 800, 800);
//Middle
fill(0, 60, 0);
triangle(500, 300, 300, 600, 700, 600);
//Top
fill(0, 70, 0);
triangle(500, 200, 400, 400, 600, 400);
endShape();
popMatrix();
}
}
// ===
class christmasObject {
float b;
float h;
void setup () {
b = random(width-50);
h = random(height-50);
}
//void draw () {
//}
}
//