VMC_Processing_Step2/VMC_Processing_Step2.pde

import ketai.sensors.*;

KetaiSensor sensor;
float fontSize = 130*displayDensity;
float rotationX, rotationY, rotationZ;
float roll, pitch, yaw;
PShape buddha;
PVector half = new PVector();
PMatrix3D baseMat;

void setup()
{
    size(displayWidth, displayHeight, P3D);
    if(sensor == null){
        sensor = new KetaiSensor(this);
        sensor.start();
    }

    buddha = loadShape("buddha.obj");
    buddha.setFill(0xffffffff);
    buddha.setSpecular(0xfffff7d5);

    textAlign(CENTER, CENTER);
    textSize(fontSize);

    half.set(width * .5, height * .5);
    baseMat = getMatrix(baseMat);
}

void draw()
{
    background(0xff000000);

    pushMatrix();
    scale(5);
    translate(0.0, 0.0, -150.0);
    lightSpecular(64, 64, 64);

    // Horizonal light.
    spotLight(255, 255, 255,
        -half.x, 1, 0,
        1, 0, 0,
        PI, 10);

    // // Vertical light.
    spotLight(255, 255, 255,
        1, -half.y, 0,
        0, 1, 0,
        PI, 10);

    shape(buddha);
    
    pitch += rotationX;
    roll += rotationY;
    yaw += rotationZ;

    buddha.rotateX(pitch);
    buddha.rotateY(-roll);
    buddha.rotateZ(yaw);

    popMatrix();
    this.setMatrix(baseMat);
    ambientLight(255, 255, 255);

    fill(255);
    textSize(fontSize * .5);
    text(
        "pitch: " + nfp(pitch * 100, 1, 1) +
        " | roll: " + nfp(roll * 100, 1, 1) + 
        " | yaw: " + nfp(yaw * 100, 1, 1), 
        0, fontSize*7.5, width, height
    );
    text("Tap screen to reset orientation", 0, fontSize*8.1, width, height);
    textSize(fontSize);
    text("fps: " + round(frameRate), 0, fontSize*9, width, height);
}

void onGyroscopeEvent(float x, float y, float z)
{
    rotationX = radians(x);
    if(round(rotationX) == 0) pitch = 0;
    rotationY = radians(y);
    if(round(rotationY) == 0) roll = 0;
    rotationZ = radians(z);
    if(round(rotationZ) == 0) yaw = 0;
}

void mousePressed()
{
    pitch = roll = yaw = 0;
    setup();
}