How to use

rotate

method

in

processing.core.PApplet

public void rotate(float angle) {
 intf.app.rotate(angle);
}

public void rotate(float angle, float x, float y, float z) {
 intf.app.rotate(angle, x, y, z);
}

/**
 * Rotate the parent sketch according to the quaternion
 *
 * @param q Quaternion
 */
public void applyQuaternion2Matrix(Quaternion q) {
  // instead of transforming q into a matrix and applying it...
  double[] aa = q.getValue();
  parent.rotate((float) aa[0], (float) aa[1], (float) aa[2], (float) aa[3]);
}

applet.pushMatrix();
applet.translate(pX + pH / 2, pY + pW / 2);
applet.rotate(HALF_PI);
applet.text(Integer.toString((int) pValue), 0, 0 + labelSize / 2 - 2);
applet.popMatrix();
applet.textAlign(PConstants.RIGHT);
applet.translate(pX - numberSize / 2, pY);
applet.rotate(HALF_PI);
applet.text(String.format(lFormat, (int) vMax), 0, 0);
applet.popMatrix();
applet.textAlign(PConstants.LEFT);
applet.translate(pX - numberSize / 2, pY + pW);
applet.rotate(HALF_PI);
applet.text(String.format(lFormat, (int) vMin), 0, 0);
applet.popMatrix();

@Override
void displayText() {
  String lFormat = "%d";
  if (displayLabel) {
    applet.fill(labelColor);
    applet.textSize(labelSize);
    applet.textAlign(PConstants.CENTER);
    applet.pushMatrix();
    applet.translate(pX + pH / 2, pY + pW / 2);
    applet.rotate(HALF_PI);
    applet.text(Integer.toString((int) pValue), 0, 0 + labelSize / 2 - 2);
    applet.popMatrix();
  }
  if (displayValue) {
    applet.textSize(numberSize);
    applet.fill(numbersColor);
    applet.pushMatrix();
    applet.textAlign(PConstants.RIGHT);
    applet.translate(pX - numberSize / 2, pY);
    applet.rotate(HALF_PI);
    applet.text(String.format(lFormat, (int) vMax), 0, 0);
    applet.popMatrix();
    applet.pushMatrix();
    applet.textAlign(PConstants.LEFT);
    applet.translate(pX - numberSize / 2, pY + pW);
    applet.rotate(HALF_PI);
    applet.text(String.format(lFormat, (int) vMin), 0, 0);
    applet.popMatrix();
  }
}

applet.pushMatrix();
applet.translate(pX + pH / 2, pY + pW / 2);
applet.rotate(HALF_PI);
applet.text(Integer.toString((int) pValue), 0, 0 + labelSize / 2 - 2);
applet.popMatrix();
applet.textAlign(PConstants.RIGHT);
applet.translate(pX - numberSize / 2, pY);
applet.rotate(HALF_PI);
applet.text(String.format(lFormat, (int) vMax), 0, 0);
applet.popMatrix();
applet.textAlign(PConstants.LEFT);
applet.translate(pX - numberSize / 2, pY + pW);
applet.rotate(HALF_PI);
applet.text(String.format(lFormat, (int) vMin), 0, 0);
applet.popMatrix();