So, as part of my research at the Craft Tech Lab, I have been assigned to (attempt) to build an input device. This device would be in the form of a physical grid, in three dimensions, whereby the user would activate various vertices/nodes to intuitively model an object, in 3d, in real time. My first attempt will be to rig up a switch and led at each node (controlled via Arduino), and display the activated nodes in real time in Processing.
Here’s the code I’ve got so far (working with 2 switches):
Processing:
/* grid 3D mapper
* v.02 - multiple input
* by Ben Leduc-Mills
*/
import processing.serial.*;
Serial myPort; // the serial port
float buttonId; // the button id we get from arduino if a button is switched
void setup() {
size(400, 300, P3D);
//size(400, 300);
println(Serial.list()); // list available serial ports
myPort = new Serial(this, Serial.list()[0], 9600);
myPort.bufferUntil('\n');
background(255); //set initial background color
}
void draw() {
}
void serialEvent (Serial myPort) {
//get the button ID
String inString = myPort.readStringUntil('\n');
if (inString != null) {
//trim whitespace
inString = trim(inString);
//convert to int so we can use it as a number
buttonId = float(inString);
//draw the point
if ( buttonId == 2 ) {
stroke(0);
point (30, 20, -50);
//ellipse(20, 30, 20 ,20);
}
//or cover it up
else if (buttonId == -2 ) {
stroke(255);
point (30, 20, -50);
//ellipse(20, 30, 20, 20);
}
if (buttonId == 3 ) {
stroke(0);
point(50, 20, -50);
}
else if (buttonId == -3 ) {
stroke(255);
point(50, 20, -50);
}
}
}
Arduino:
/* 3D grid object placement
* V.02 - two buttons
* Ben Leduc-Mills
*/
// pin assignments won't change
// each point has a switch, an led, and an xyz coordinate
const int button1 = 2;
const int button2 = 3;
//const int led1 = 3;
//var for reading button status
int button1State = 0;
int button2State = 0;
void setup() {
//start serial communitcation
Serial.begin(9600);
//init LED pins as output
//pinMode(led1, OUTPUT);
//init button pins as input
pinMode(button1, INPUT);
pinMode(button2, INPUT);
}
void loop() {
// read button states
button1State = digitalRead(button1);
if (button1State == HIGH) {
//digitalWrite(led1, HIGH);
//Serial.print("button 1:");
Serial.println(button1);
}
else if (button1State == LOW) {
Serial.println(button1 * -1);
}
button2State = digitalRead(button2);
if (button2State == HIGH) {
Serial.println(button2);
}
else if (button2State == LOW) {
Serial.println(button2 * -1);
}
}
