Eng:3D Patterns

Translate: - English 

This article or section may not have content matching Scratch Wiki editing standards. Please improve it according to Scratch Wiki:Guidelines. Reason: Uses way too much first person

Please expand this article or section. You can help by adding more information if you are an editor. More information might be found in a section of the talk page.

How Does 3D Work In Scratch?

Scratch is mostly intended for 2d projects, but it is possible to create a 3d effect with scratch. You can do this by projecting a point that uses the dimensions x, y, and z to find its position.

Making The Main Script

First of all, we will need to make some custom blocks. Here they are:

define Reset
define Draw

Afterwards, make this script,

when green flag clicked
set pen color to (pick random (1) to (100))
Reset :: custom
forever
clear
Draw :: custom
change [delta v] by (1)
end

The script above is the loop that will start everything up in the project.

Getting the Variables Ready

Next you will need to get the variables ready. With the Reset :: custom custom block make this script:

define Reset
set [angle v] to [0]
set [A v] to [220]
set [B v] to [160]
set [r1 v] to (pick random (1) to (100))
set [r2 v] to (pick random (1) to (100))
set [delta v] to (pick random (1) to (90))a
go to x: ((A) * ([sin v] of (((angle) * (r1)) + (delta)))) y: ((B) * ([cos v] of (((angle) * (r2)) + (delta)))
pen down
set pen size to (50)

The Reset block will also make a pattern, so it will be useful.

Note:

For easier access, make the r1 and r2 variables sliders.

Creating the Draw Script

The following script will be very complicated since it will use a lot of math. The reason for that is because the script also shades what it'll draw.

Next, we will need to make a very complicated script. We will use the Draw :: custom custom block to make it.

define Draw
show
clear
pen down
repeat (360)
go to x: ((A) * ([sin v] of (((angle) * (r1)) + (delta)))) y: ((B) * ([cos v] of ((angle) * (r2))
set pen size to ([abs v] of ((((1000) - ((A) * ([sin v] of (((angle) * (r1)) + (delta))))) - ((B) * ([cos v] of ((angle) * (r2))))) / (150)))
set pen shade to ((-0.5) * (((A) * ([sin v] of (((angle) * (r1)) + (delta)))) - ((B) * ([cos v] of ((angle) * (r2))))
change [angle v] by (1)
move (10) steps

Example Projects

• 3D Pattern Drawer