// Function to update location
public void update() {
// As long as we aren't dragging the pendulum, let it swing!
if (!dragging) {
float G = 0.4f; // Arbitrary universal gravitational constant
theta_acc = (-1 * G / r) * sin(theta); // Calculate acceleration (see:
// http://www.myphysicslab.com/pendulum1.html)
theta_vel += theta_acc; // Increment velocity
theta_vel *= damping; // Arbitrary damping
theta += theta_vel; // Increment theta
}
loc.setXY(r * sin(theta), r * cos(theta)); // Polar to cartesian conversion
loc.add(origin); // Make sure the location is relative to the pendulum's origin
}
void wander() {
float wanderR = 10.0f; // radius for our "wander circle"
float wanderD = 20.0f; // distance for our "wander circle"
wandertheta += random(-1, 1); // randomly changet wander theta
// now we have to calculate the new location to steer towards on the wander circle
Vector3D v = vel.copy();
v.normalize(); // our heading
float xoff =
wanderD * v.x() + wanderR * cos(wandertheta); // x spot on circle based on heading
float yoff =
wanderD * v.y() + wanderR * sin(wandertheta); // y spot on circle based on heading
Vector3D target = Vector3D.add(loc, new Vector3D(xoff, yoff)); // add the location
acc.add(steer(target, false)); // steer towards it
}
// function to update location
void update() {
vel.add(acc);
loc.add(vel);
timer -= 1.0f;
}
public void updateWorld(long elapsedTime) {
float angleVelocity;
Player player = (Player) gameObjectManager.getPlayer();
MovingTransform3D playerTransform = player.getTransform();
Vector3D velocity = playerTransform.getVelocity();
// playerTransform.stop();
velocity.x = 0;
velocity.z = 0;
float x = -playerTransform.getSinAngleY();
float z = -playerTransform.getCosAngleY();
if (goForward.isPressed()) {
velocity.add(x * PLAYER_SPEED, 0, z * PLAYER_SPEED);
}
if (goBackward.isPressed()) {
velocity.add(-x * PLAYER_SPEED, 0, -z * PLAYER_SPEED);
}
if (goLeft.isPressed()) {
velocity.add(z * PLAYER_SPEED, 0, -x * PLAYER_SPEED);
}
if (goRight.isPressed()) {
velocity.add(-z * PLAYER_SPEED, 0, x * PLAYER_SPEED);
}
if (jump.isPressed()) {
player.setJumping(true);
}
if (fire.isPressed()) {
player.fireProjectile();
}
playerTransform.setVelocity(velocity);
// look up/down (rotate around x)
angleVelocity = Math.min(tiltUp.getAmount(), 200);
angleVelocity += Math.max(-tiltDown.getAmount(), -200);
playerTransform.setAngleVelocityX(angleVelocity * PLAYER_TURN_SPEED / 200);
// turn (rotate around y)
angleVelocity = Math.min(turnLeft.getAmount(), 200);
angleVelocity += Math.max(-turnRight.getAmount(), -200);
playerTransform.setAngleVelocityY(angleVelocity * PLAYER_TURN_SPEED / 200);
// update objects
gameObjectManager.update(elapsedTime);
// limit look up/down
float angleX = playerTransform.getAngleX();
float limit = (float) Math.PI / 2;
if (angleX < -limit) {
playerTransform.setAngleX(-limit);
} else if (angleX > limit) {
playerTransform.setAngleX(limit);
}
// set the camera to be 100 units above the player
Transform3D camera = polygonRenderer.getCamera();
camera.setTo(playerTransform);
camera.getLocation().add(0, CAMERA_HEIGHT, 0);
}