public void avoid(ArrayList obstacles) {

      // Make a vector that will be the position of the object
      // relative to the Boid rotated in the direction of boid's velocity
      PVector closestRotated = new PVector(sight + 1, sight + 1);
      float closestDistance = 99999;
      Obstacle avoid = null;

      // Let's look at each obstacle
      for (int i = 0; i < obstacles.size(); i++) {
        Obstacle o = (Obstacle) obstacles.get(i);

        float d = PVector.dist(loc, o.loc);
        PVector dir = vel.get();
        dir.normalize();
        PVector diff = PVector.sub(o.loc, loc);

        // Now we use the dot product to rotate the vector that points from boid to obstacle
        // Velocity is the new x-axis
        PVector rotated = new PVector(diff.dot(dir), diff.dot(getNormal(dir)));

        // Is the obstacle in our path?
        if (PApplet.abs(rotated.y) < (o.radius + r)) {
          // Is it the closest obstacle?
          if ((rotated.x > 0) && (rotated.x < closestRotated.x)) {
            closestRotated = rotated;
            avoid = o;
          }
        }
      }

      // Can we actually see the closest one?
      if (PApplet.abs(closestRotated.x) < sight) {

        // The desired vector should point away from the obstacle
        // The closer to the obstacle, the more it should steer
        PVector desired =
            new PVector(closestRotated.x, -closestRotated.y * sight / closestRotated.x);
        desired.normalize();
        desired.mult(closestDistance);
        desired.limit(maxspeed);
        // Rotate back to the regular coordinate system
        rotateVector(desired, vel.heading2D());

        // Draw some debugging stuff
        if (debug) {
          stroke(0);
          line(loc.x, loc.y, loc.x + desired.x * 10, loc.y + desired.y * 10);
          avoid.highlight(true);
        }

        // Apply Reynolds steering rules
        desired.sub(vel);
        desired.limit(maxforce);
        acc.add(desired);
      }
    }
Exemplo n.º 2
0
 /**
  * Given two points p1, p2 and a line passing through a,b check whether p1 and p2 are on the
  * same side of the line. In our case a,b are characters and p1, p2 are cameras
  */
 public boolean isInSameHalfPlane(PVector p1, PVector p2, PVector a, PVector b) {
   PVector copyP1 = new PVector(p1.x, p1.y, p1.z);
   PVector copyP2 = new PVector(p2.x, p2.y, p2.z);
   PVector copyA = new PVector(a.x, a.y, a.z);
   PVector copyB = new PVector(b.x, b.y, b.z);
   copyB.sub(copyA);
   copyP1.sub(copyA);
   copyP2.sub(copyA);
   PVector p1a = copyB.cross(copyP1);
   PVector p2a = copyB.cross(copyP2);
   if (p1a.dot(p2a) > 0) {
     return true;
   }
   return false;
 }
Exemplo n.º 3
0
 public boolean isInView(PVector vect) {
   PVector z = getZAxis();
   PVector v1 = PVector.sub(vect, getTranslation());
   float dotP = PVector.dot(v1, z) / (z.mag() * v1.mag());
   if ((acos(dotP) * 180 / PI) <= fov) {
     return true;
   }
   return false;
 }
 public void drag() {
   // If we are draging the ball, we calculate the angle between the
   // pendulum origin and mouse location
   // we assign that angle to the pendulum
   if (dragging) {
     PVector diff =
         PVector.sub(origin, new PVector(mouseX, mouseY)); // Difference between 2 points
     theta = atan2(-1 * diff.y, diff.x) - radians(90); // Angle relative to vertical axis
   }
 }
Exemplo n.º 5
0
    public void calculateForces(ArrayList objects) {
      for (int i = 0; i < objects.size(); i++) {
        CelestialObject obj = (CelestialObject) objects.get(i);
        ArrayList forces = obj.getForces();
        float totalForceX = 0;
        float totalForceY = 0;

        for (int j = 0; j < forces.size(); j++) {
          totalForceX += ((PVector) forces.get(j)).x;
          totalForceY += ((PVector) forces.get(j)).y;
        }

        PVector newAccel = new PVector(totalForceX / obj.getMass(), totalForceY / obj.getMass());

        obj.setAcceleration(newAccel);
      }

      for (int i = 0; i < objects.size(); i++) {
        CelestialObject obj1 = (CelestialObject) objects.get(i);
        float forceX = 0;
        float forceY = 0;
        obj1.clearForces();

        if (obj1.getClass() == Star.class) {
          println(obj1.getVelocity());
          continue;
        }

        for (int j = 0; j < objects.size(); j++) {
          CelestialObject obj2 = (CelestialObject) objects.get(j);

          if (i == j) continue;

          PVector pvDistance = PVector.sub(obj2.getPosition(), obj1.getPosition());
          //    println("distance: x:" + pvDistance.x + " y:" + pvDistance.y);
          float distance = sqrt(sq(pvDistance.y) + sq(pvDistance.x));
          float angle = degrees(atan2(pvDistance.y, pvDistance.x));

          float force = (G * obj1.getMass() * obj2.getMass()) / sq(distance);
          forceX = force * cos(radians(angle));
          forceY = force * sin(radians(angle));
          //        println("FORCES on " + obj1.getName() + ":" + forceX + "," + forceY);
          obj1.addForce(new PVector(forceX, forceY));

          println();
        }
      }
    }
Exemplo n.º 6
0
    public void checkThirtyDegreeRule(
        ArrayList<Cam> cameras, ArrayList<Character> characters, int selectedIdx) {
      if (cameras == null || cameras.isEmpty()) {
        println("No cameras in the scene!");
      }

      if (characters.size() != 2) {
        println("Only two characters supported for now");
        // TODO (sanjeet): Hack! Fix this once more characters are allowed
      }

      Cam selectedCamera = cameras.get(selectedIdx);

      // TODO The characters.get results in a runtime error because there aren't currently any
      // characters allocated in the input file.
      Character ch1 = characters.get(0);
      Character ch2 = characters.get(1);

      // Obtaining (x,y,z) for characters and selected camera
      PVector ch1Location = ch1.getTranslation();
      PVector ch2Location = ch2.getTranslation();
      PVector selectedCameraLocation = selectedCamera.getTranslation();

      PVector cameraPoint = new PVector();
      cameraPoint.add(selectedCameraLocation);
      for (int i = 0; i < 100; i++) {
        cameraPoint.add(selectedCamera.getZAxis());
      }
      PVector intersection =
          getTwoLinesIntersection(
              new PVector(ch1Location.x, ch1Location.z),
              new PVector(ch2Location.x, ch2Location.z),
              new PVector(selectedCameraLocation.x, selectedCameraLocation.z),
              new PVector(cameraPoint.x, cameraPoint.z));

      PVector diff = PVector.sub(selectedCameraLocation, intersection);
      diff.normalize();
      FloatBuffer fb = selectedCamera.modelViewMatrix;
      float[] mat = fb.array();
      float[] fbMatrix = new float[mat.length];
      for (int i = 0; i < fbMatrix.length; i++) {
        fbMatrix[i] = mat[i];
      }
      fbMatrix[0] = -diff.x;
      fbMatrix[1] = diff.y;
      fbMatrix[2] = -diff.z;
      fbMatrix[9] = diff.x;
      fbMatrix[10] = diff.y;
      fbMatrix[11] = diff.z;
      fbMatrix[13] = intersection.x;
      fbMatrix[14] = intersection.y;
      fbMatrix[15] = intersection.z;
      PMatrix3D matrix = new PMatrix3D();
      matrix.set(fbMatrix);
      matrix.transpose();
      pushMatrix();
      applyMatrix(matrix);
      rotateY(radians(30));
      line(0, 0, 0, 0, 0, 1000);
      rotateY(radians(-2 * 30));
      line(0, 0, 0, 0, 0, 1000);
      popMatrix();

      for (int i = 0; i < cameras.size(); i++) {
        if (i == selectedIdx) {
          continue;
        }

        if (!cameras.get(i).isInView(ch1Location) && !cameras.get(i).isInView(ch2Location)) {
          continue;
        }
        PVector currCamLocation = cameras.get(i).getTranslation();
        PVector vect1 = PVector.sub(currCamLocation, intersection);
        PVector vect2 = PVector.sub(selectedCameraLocation, intersection);
        float dotP = vect1.dot(vect2) / (vect1.mag() * vect2.mag());
        if (acos(dotP) <= PI / 6) {
          cameras.get(i).setColor(255, 0, 0);
        } else {
          cameras.get(i).setColor(0, 0, 255);
        }
      }
    }