On the World page for your clone, click "Edit" to launch the editor.
Edit the title.
Edit the description.
Go back to the World page and reload. You will see the new title and description.
const objectsize = 200; // size of object
const anglechange = 0.01; // how much the rotate angle changes each step
var angle = 0; // rotate angle starts at 0
function setup() // "setup" is called once at start of run
createCanvas ( ABWorld.fullwidth(), ABWorld.fullheight(), WEBGL );
function draw() // "draw" is called every timestep during run
background("lightblue"); // background color
fill("navy"); // paint box with this color
rotateX(angle); // set each dimension rotation angle to "angle"
box(objectsize); // draw a cube of this size
angle = angle + anglechange ; // change angle each step to get rotate movement
The program is a set of instructions for the computer to "execute".
Instructions end with ";". This is important.
You can insert blank lines, spaces and tabs in order to change the program layout
and normally it does not matter.
The program will still work the same.
You can insert "comments". These begin with "//" and continue to the end of line.
These are notes to the human reader and are ignored by the computer.
There is a lot to learn about
but you do not need to learn it all before trying some programming.
You can change code, press "Save" and then "Run" the new code.
Nothing bad can happen.
You cannot damage your machine or our server.
Change the following:
Change the object size.
Change how much the rotation angle changes each step.
Changing this can make a dramatic difference.
You can change the box to not be a cube by giving it numbers for all 3 dimensions:
box ( width, height, depth );
box ( 200, 50, 1000 );
Every time you make a change, press Save, and Run again.
P5 programs use the following structure
to define what code runs once at startup,
and what code runs every time step:
// Can define global variables and constants up here, outside both functions
// Instructions to be executed once, at start of run
// Instructions to be executed every time step
Note the chain brackets. These define the start and end of blocks of code.
We will now add some new code at certain locations within the structure.
The cube is "painted" with a solid color.
It would be nice to paint it with a JPEG or PNG image.
Insert the following code at the top of the program:
img = loadImage ( "/uploads/starter/earth.1.jpg" );
Put the following code inside the "draw" function.
Remove the line that makes the cube a solid color, and insert this line instead:
You will now get something like the following:
Web search for some image you want to use.
Right-click and "Copy image".
Go to menu "User" - "My uploads".
Paste (Ctrl-V) and the image is uploaded.
You can also select an image from your computer
by browsing files.
You need the exact file name of the image.
to point to your userid and your file:
The cube will now be painted with your image.
Use other people's uploads
In the header above,
in the search box
to see what other people have uploaded.
You can use all their uploads in your World.
This makes a second box some distance away. Both will rotate.
To see the power of programming, we will make lots of boxes,
using what is called a
Insert the following code at the top:
// make an array of random (x,y,z) positions
const noboxes = 30; // how many boxes to have
var a = new Array(noboxes); // array of the box positions
for ( var i=0; i < noboxes; i++ ) // set up the array
a[i] = [ AB.randomIntAtoB(-500,500), AB.randomIntAtoB(-500,500), AB.randomIntAtoB(-500,500) ];
Insert the following code inside "draw", replacing the previous "box" and "translate" instructions:
for ( var i=0; i < noboxes; i++ )
translate ( a[i], a[i], a[i] ); // get box position i
This makes a large number of boxes in randomly different places, like the following image.
Increase the number of boxes until your browser cannot cope.
Don't worry, you cannot cause any damage!
Now we add some background music.
Insert the following code right at the top:
Many of the Starter Worlds have a section of code called a "tweaker's box" at the top.
This contains the easiest parts of code to change.
When you get more advanced, you will make your own entire Worlds.
The Worlds you create are only limited by your imagination.
Tutorial 18.7 253 runs ♦ 0 likes By "Coding Train" p... Created: 9 Sep 2018 Modified: 11 Sep 2018 Tutorial 18.7 with full canvas, resized model, sound. Texture on box is image from another user.
Tutorial 7.8 variant 159 runs ♦ 0 likes By "Coding Train" p... Created: 6 Sep 2018 Modified: 11 Sep 2018 Tutorial 7.8 with music and other uploaded images, including from other users. Click on the images.
Show it off
The system will generate an image to represent your World.
To change it,
see "New image" on the World page.
The site works on mobile.
Show off your World to people on your mobile.
For some Worlds, touch will automatically drag and zoom the World's camera.
People can find your World using the search box.
So give it a good name.
You can embed your World on another website.
See "Embed code" on the World page.
Comment on other people's Worlds.
The top menu turns red when you have a new comment.