Chapter 2 Control 2D and 3D Figures

In this chapter, we will use ESP32 board to make Processing program control figure changes. And we will control 2D and 3D figures, respectively.

Project 2.1 Ellipse

First, control a 2D figure.

Component List

ESP32-WROVER x1

Chapter01_00

GPIO Extension Board x1

Chapter01_01

Breadboard x1

Chapter01_02

Joystick x1

Chapter14_00

Jumper M/M x3

Chapter01_05

Circuit

Use Pin36 and Pin39 (A0 and A3) ports to detect the voltage value of two rotary potentiometers inside joystick.

Schematic diagram

Chapter02_00

Hardware connection

Chapter02_01

Sketch

Sketch Ellipse

Use Processing to open Freenove Ultimate Starter Kit for ESP32CProcessingProcessingEllipseEllipse.pde , then click Run. If the connection succeeds, the following will be shown:

Then you can change the ellipse shape by shifting the joystick:

Project 2.2 Box 3D

Now control a 3D figure.

Component list

The same as last section.

Circuit

The same as last section.

Sketch

Sketch Box_3D

Use Processing to open Freenove Ultimate Starter Kit for ESP32CProcessingProcessingBox_3DBox_3D.pde , and click Run. If the connection succeeds, the following will be shown. The left is a 3D box presented by line and the right is a 3D box entity.

Then you can change the space angle of two 3D box by shifting the joystick: