public void update(float db) {
      // we can use the db value here to change the speed of the particles
      loc.add(vel.mult(vel, map(db, -100, 100, .05f, 5)));
      if (loc.x < 0 || loc.x > width) {
        vel.x *= -1;
      }
      if (loc.y < 0 || loc.y > height) {
        vel.y *= -1;
      }

      radius = constrain(db, 2, 100);
    }
Beispiel #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;
 }
Beispiel #3
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);
        }
      }
    }
Beispiel #4
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;
 }