Method quad

core/src/processing/javafx/PGraphicsFX2D.java:733–755

(float x1, float y1, float x2, float y2,
                   float x3, float y3, float x4, float y4)

  @Override
  public void quad(float x1, float y1, float x2, float y2,
                   float x3, float y3, float x4, float y4) {
    beforeContextDraw();
    if (drawingThinLines()) {
      x1 += 0.5f;
      x2 += 0.5f;
      x3 += 0.5f;
      x4 += 0.5f;
      y1 += 0.5f;
      y2 += 0.5f;
      y3 += 0.5f;
      y4 += 0.5f;
    }
    context.beginPath();
    context.moveTo(x1, y1);
    context.lineTo(x2, y2);
    context.lineTo(x3, y3);
    context.lineTo(x4, y4);
    context.closePath();
    if (fill) context.fill();
    if (stroke) context.stroke();
  }