Shapes 3D library camera doesn´t focus whole composition

Hi guys, well i´ve been using the Shapes3D library, y downloaded a sketch for a tunnel and used the examples from the library, this example had 2 java codes added, it showed me the tunnel full at the display but didn´t let me add images, use the displayWidth and displayHeight commands or use present ir at full screen, so i took out the java codes added, now it works perfectly, but doesn´t get the whole tunel just the center of it, like if the camera had smaller vision o was far from the composition. I´ve tried everything, closing up the camera, scaling, making bigger the tunnel, nothing works.

 /* OpenProcessing Tweak of *@*http://www.openprocessing.org/sketch/25597*@* */
        /* !do not delete the line above, required for linking your tweak if you upload again */
        import shapes3d.utils.*;
        import shapes3d.animation.*;
        import shapes3d.*;

        int enviar=0;

        // Path dependent variables
        I_PathGen[] path;
        int nbrPaths = 1;
        int currPath = 0;
        float[] speedFactor;

        // The tubes
        PathTube atube, wtube;
        int tubeType = 0;
        int nbrTubeTypes = 2;
        final int SLICES = 300, SEGMENTS = 8;

        // The shuttle
        //Toroid train;
        Box[] bcar;
        final int nbrBoxCars = 0;

        // Used for train/car orientation to the tube
        final PVector FORWARD_AXIS = new PVector(0, 1, 0);
        final PVector LEFT_AXIS = new PVector(-1, 0, 0);
        final PVector RIGHT_AXIS = new PVector(0, 0, -1);
        PVector normal, tangent, position;
        PVector camPos, camLookAt, camUp;
        Rot rot;
        float[] ang;

        // SHUTTLE SPEED CONTROL VARIABLES
        float speed = 0.06, pathFactor = 1, elapsed;
        float paraT = 0.5;  // starting position on curve
        float camParaT;
        long st, ct;      // keep track of running time


        void setup() {

          size(1280, 690, P3D);
          // Create the path generator
          //  path = new Tube (this,4,6);
          path = new I_PathGen[nbrPaths];

          // hacer una clase para definir el parámetro 
            path[0] = new Lissajous(1, 1, 1);
          speedFactor = new float[nbrPaths];

          // Create the tube
          atube = new PathTube(this, path[currPath], 40, SLICES, 35, false); 
          atube.drawMode(Shape3D.SOLID);
          atube.visible(false, Shape3D.BOTH_CAP);


          // Create path cage
          wtube = new PathTube(this, path[currPath], 38, (SLICES/2), 8, true);
          wtube.stroke(color(120, 120, 255));
          wtube.strokeWeight(1);
          wtube.drawMode(Shape3D.WIRE); // estructura alámbrica 
          wtube.visible(false, Shape3D.BOTH_CAP);


          // Initialise spacing and speed factors
          float l = atube.length(400); 
          speedFactor[currPath] = 800 / l;

          // Create the box cars
          bcar = new Box[nbrBoxCars];
          for (int i = 0; i < nbrBoxCars; i++) {
            bcar[i] = new Box(this, 0);
          }
          // Initialise times
          st = ct = millis();
        }

        void draw() {
         // scale(10,10,10);
          background(16);
          lights();
          // Used to get frame-rate independent speed
          ct = millis();
          //image(img, 0, 0);
          elapsed = (ct - st)/1000.0;
          st = ct;
          paraT += elapsed * speed * speedFactor[currPath];
          paraT = (paraT > 1) ? paraT-1 : paraT;
          normal = atube.getNormal(paraT);
          tangent = atube.getTangent(paraT);
          position = atube.getPoint(paraT); 

          // Calculate camera position to move with the shuttle
          normal.normalize();
          camUp = PVector.mult(normal, -1);
        println (camLookAt);
          camParaT = paraT - 0.0;
          camParaT = (camParaT > 1) ? camParaT: camParaT;
          camPos = atube.getPoint(camParaT);
          camPos.add(camUp);


          camLookAt = PVector.mult(tangent, 90); 
          camLookAt.add(camPos);

          camera(camPos.x, camPos.y, camPos.z, 
          camLookAt.x, camLookAt.y, camLookAt.z, 
          camUp.x, camUp.y, camUp.z);

          float bparaT = paraT;
          for (int i = 0; i < nbrBoxCars; i++) { 
            bparaT = (bparaT < 0) ? bparaT + 1 : bparaT;
            normal = atube.getNormal(bparaT);
            position = atube.getPoint(bparaT);
            rot = new Rot(FORWARD_AXIS, RIGHT_AXIS, tangent, normal);
            ang = rot.getAngles(RotOrder.XYZ);
            bcar[i].moveTo(position);
            bcar[i].rotateTo(ang);
            bcar[i].draw();
          }
          wtube.draw();
          atube.draw();
        }

        void keyReleased() {
          // Adjust speed
          if (key >= '0' && key <= '9') {
            speed = (key - 48) / 50.0;
          }
        }