Akcelerometre
Zo stránky SensorWiki
Modifikované cvičenie na DOMA:
Úloha:
Akcelerometre ktoré máte v mobile, alebo ako samostatný senzor, použijeme na ovládanie 3D modelu v prostredí Processing.
Postup:
1. Údaje z akcelerometrov v mobile prenesiete cez Bluetooth alebo cez WiFi pomocou niektorej z aplikácií, ktoré poznáte z predošlých cvičení. Kontrola: v programe Terminal.exe alebo podobnom skontrolujete, či prijímate správne údaje.
2. Údaje prijmete v aplikácii, ktorú máte ako vzor uvedenú nižšie. Treba len: a) rozparsovať prijímané dáta na tri súradnice ax, ay a az. b) prepočítať zrýchlenia na natočenia roll, yaw a pitch. c) na základe výpočtu pohybovať objektom v okne
3. Okrem vzorovej kocky, ktorú máte vo vzorovej aplikácii, vytvorte alebo stiahnite z internetu iný 3D model vo formáte .obj a demonštrujte na krátkom videu, že ním viete otáčať.
Odovzdať treba:
- video na ktorom vidno ako otáčate objektom pohybom mobilu
- zdrojový kód v Processingu (.pde)
- model objektu (.obj)
Vzorový program
// https://github.com/PaulStoffregen/NXPMotionSense/tree/master/OrientationVisualiser
//
// https://www.pjrc.com/store/prop_shield.html
import processing.serial.*;
Serial myPort;
PImage bg;
PShape myObject;
float yaw = 0.0;
float pitch = 0.0;
float roll = 0.0;
void setup()
{
size(600, 600, P3D);
bg = loadImage("grid10.png");
myObject = loadShape("tinker.obj"); // vymodelovane v tinkerCADe ak tamnahram aj obj.mtl, tak to bude farebne!
// if you don't know anything, first list all available ports:
printArray(Serial.list());
// while (!keyPressed) { /* wait here, please */ }
// if you have only ONE serial port active
//myPort = new Serial(this, Serial.list()[1], 115200); // if you have only ONE serial port active
// if you know the serial port name
//myPort = new Serial(this, "COM5:", 9600); // Windows "COM#:"
myPort = new Serial(this, "\\\\.\\COM39", 115200); // Windows, COM10 or higher
//myPort = new Serial(this, "/dev/ttyACM0", 9600); // Linux "/dev/ttyACM#"
//myPort = new Serial(this, "/dev/cu.usbmodem1217321", 9600); // Mac "/dev/cu.usbmodem######"
// not used, zda sa...
// textSize(16); // set text size
// textMode(SHAPE); // set text mode to shape
}
void draw()
{
serialEvent(); // read and parse incoming serial message
// background(255); // set background to white
background(bg); // set background to white
lights();
translate(width/2, height/2); // set position to centre
pushMatrix(); // begin object
float c1 = cos(radians(roll));
float s1 = sin(radians(roll));
float c2 = cos(radians(-pitch));
float s2 = sin(radians(-pitch));
float c3 = cos(radians(yaw));
float s3 = sin(radians(yaw));
/* applyMatrix( c2*c3, s1*s3+c1*c3*s2, c3*s1*s2-c1*s3, 0,
-s2, c1*c2, c2*s1, 0,
c2*s3, c1*s2*s3-c3*s1, c1*c3+s1*s2*s3, 0,
0, 0, 0, 1);
*/
rotateX(radians(roll));
rotateY(radians(-pitch));
rotateZ(radians(yaw));
//drawPropShield();
//drawRGBcross();
shape(myObject);
popMatrix(); // end of object
// Print values to console
print(roll);
print("\t");
print(-pitch);
print("\t");
print(yaw);
println();
}
void serialEvent()
{
float aX, aY, aZ;
int newLine = 13; // new line character in ASCII
String message;
do {
message = myPort.readStringUntil(newLine); // read from port until new line
if (message != null) {
String[] list = split(trim(message), " "); // rozdelime to medzerami (mozem sem dat napr. ciarky)
if (list.length >= 4 && list[0].equals("Orientation:")) { // tu vyhodime zo zaciatku slovo Orientation: ale nemusi to byt vobec
aX = float(list[1]); // convert to float yaw
aY = float(list[2]); // convert to float pitch
aZ = float(list[3]); // convert to float roll
aX = map(aX,-1023,1023,-9.81,9.81);
aY = map(aY,-1023,1023,-9.81,9.81);
aZ = map(aZ,-1023,1023,-9.81,9.81);
pitch = 180 * atan (aX/sqrt(aY*aY + aZ*aZ))/ PI;
roll = 180 * atan (aY/sqrt(aX*aX + aZ*aZ))/ PI;
yaw = 180 * atan (aZ/sqrt(aX*aX + aZ*aZ))/ PI;
//yaw=45;
//pitch=-45;
//roll=45;
}
}
} while (message != null);
}
void drawRGBcross()
{
/* function contains shape(s) that are rotated with the IMU */
stroke(0); // black outline
fill(100, 128, 50); // fill color PCB green
fill(255, 215, 0); // gold color
box(100,100, 100); // cube
// arrows
stroke(0, 0, 250); // set outline colour to blue
translate(100, 100, 100); // set position to other edge of Arduino box
box(1, 1, 200); // draw Arduino board base shape
stroke(0, 250,0); // set outline colour to darker teal
box(200, 1, 1); // draw Arduino board base shape
stroke(250,0,0); // set fill colour to lighter teal
box(1, 200, 1); // draw Arduino board base shape
/*
stroke(0); // set outline colour to black
fill(80); // set fill colour to dark grey
translate(60, -10, 90); // set position to edge of Arduino box
box(170, 20, 10); // draw pin header as box
translate(-20, 0, -180); // set position to other edge of Arduino box
box(210, 20, 10); // draw other pin header as box
*/
}
void drawPropShield()
{
// 3D art by Benjamin Rheinland
stroke(0); // black outline
fill(0, 128, 0); // fill color PCB green
box(190, 6, 70); // PCB base shape
fill(255, 215, 0); // gold color
noStroke();
//draw 14 contacts on Y- side
translate(65, 0, 30);
for (int i=0; i<14; i++) {
sphere(4.5); // draw gold contacts
translate(-10, 0, 0); // set new position
}
//draw 14 contacts on Y+ side
translate(10, 0, -60);
for (int i=0; i<14; i++) {
sphere(4.5); // draw gold contacts
translate(10, 0, 0); // set position
}
//draw 5 contacts on X+ side (DAC, 3v3, gnd)
translate(-10,0,10);
for (int i=0; i<5; i++) {
sphere(4.5);
translate(0,0,10);
}
//draw 4 contacts on X+ side (G C D 5)
translate(25,0,-15);
for (int i=0; i<4; i++) {
sphere(4.5);
translate(0,0,-10);
}
//draw 4 contacts on X- side (5V - + GND)
translate(-180,0,10);
for (int i=0; i<4; i++) {
sphere(4.5);
translate(0,0,10);
}
//draw audio amp IC
stroke(128);
fill(24); //Epoxy color
translate(30,-6,-25);
box(13,6,13);
//draw pressure sensor IC
stroke(64);
translate(32,0,0);
fill(192);
box(10,6,18);
//draw gyroscope IC
stroke(128);
translate(27,0,0);
fill(24);
box(16,6,16);
//draw flash memory IC
translate(40,0,-15);
box(20,6,20);
//draw accelerometer/magnetometer IC
translate(-5,0,25);
box(12,6,12);
//draw 5V level shifter ICs
translate(42.5,2,0);
box(6,4,8);
translate(0,0,-20);
box(6,4,8);
}
Tipy:
- Na vytvorenie 3D objektu môžete použiť napr. TinkerCAD (návody na tomto YouTube kanáli: https://www.youtube.com/playlist?list=PLmh6bwr3ZDwAzcU1krZOvCDkJEuO8nUhv
- Ak k vyexportovanému objektu pridáte aj .mtl súbor, objekt bude farebný
- Tento demo program v Processingu otáča objektom pomocou myšky