Examples with Vector2D spacesettlers.utilities.Vector2D used on opensource projects

Example 26 with Vector2D

use of spacesettlers.utilities.Vector2D in project spacesettlers by amymcgovern.

the class CollisionHandler method elasticCollision2DWithNonMoveableObject.

/**
 * Elastically collide all objects following the vector formulation found at:
 *
 * http://www.vobarian.com/collisions/2dcollisions2.pdf
 *
 * @param object1 first object in the collision
 * @param object2 second object in the collision
 * @param space handle to space for distance calculations
 */
private void elasticCollision2DWithNonMoveableObject(AbstractObject movingObject, AbstractObject stationaryObject, Toroidal2DPhysics space) {
    // handle overlapping objects
    adjustCentersAtCollision(movingObject, stationaryObject, space);
    // get the masses
    double m1 = movingObject.getMass();
    double m2 = stationaryObject.getMass();
    // now get the vector from the first to the second, get the unit normal and tangent
    Vector2D distanceVec = space.findShortestDistanceVector(movingObject.getPosition(), stationaryObject.getPosition());
    Vector2D unitNormal = distanceVec.getUnitVector();
    Vector2D unitTangent = new Vector2D(-unitNormal.getYValue(), unitNormal.getXValue());
    // get the velocity vectors
    Vector2D velocity1 = movingObject.getPosition().getTranslationalVelocity();
    // get the scalars in each direction
    double u1 = velocity1.dot(unitNormal);
    double t1 = velocity1.dot(unitTangent);
    // now just reverse the velocity for the first object
    double v1 = -u1;
    // now get it back to the original space
    Vector2D vel1Normal = unitNormal.multiply(v1);
    Vector2D vel1Tangent = unitTangent.multiply(t1);
    // add the normal and tangential parts
    Vector2D newVelocity1 = vel1Normal.add(vel1Tangent);
    movingObject.getPosition().setTranslationalVelocity(newVelocity1);
// ensureObjectsNotStillColliding(movingObject, stationaryObject, space);
}

Example 27 with Vector2D

use of spacesettlers.utilities.Vector2D in project spacesettlers by amymcgovern.

the class Toroidal2DPhysics method respawnDeadObjects.

/**
 * Respawns any dead objects in new random locations.  Ships
 * have a delay before they can respawn.
 */
public void respawnDeadObjects(Random random, double asteroidMaxVelocity) {
    for (AbstractObject object : allObjects) {
        if (!object.isAlive() && object.canRespawn()) {
            Position newPosition = null;
            // flags should re-spawn at a randomly chosen starting location
            if (object instanceof Flag) {
                Flag flag = (Flag) object;
                newPosition = flag.getNewStartingPosition(random);
                // ensure their starting location is free (to handle the thought bug the class
                // introduced of putting a ship or a base where the flag should spawn)
                newPosition = getRandomFreeLocationInRegion(random, flag.getRadius() * 2, (int) newPosition.getX(), (int) newPosition.getY(), 75);
            } else {
                // note this is time 2 in order to ensure objects don't spawn touching (and just to get
                // them a bit farther apart
                newPosition = getRandomFreeLocation(random, object.getRadius() * 2);
            }
            object.setPosition(newPosition);
            object.setAlive(true);
            object.setDrawable(true);
            // reset the UUID if it is a asteroid or beacon
            if (object instanceof Asteroid || object instanceof Beacon) {
                object.resetId();
            }
            // make moveable asteroids move again when they respawn
            if (object.isMoveable() && !(object instanceof Flag)) {
                Vector2D randomMotion = Vector2D.getRandom(random, asteroidMaxVelocity);
                object.getPosition().setTranslationalVelocity(randomMotion);
            }
        }
    }
}

Example 28 with Vector2D

use of spacesettlers.utilities.Vector2D in project spacesettlers by amymcgovern.

the class TestMoveAction method setUp.

@Before
public void setUp() throws Exception {
    space = new Toroidal2DPhysics(480, 640, timestep);
    targetVelocity = new Vector2D();
}

Example 29 with Vector2D

use of spacesettlers.utilities.Vector2D in project spacesettlers by amymcgovern.

the class TestMoveAction method testpdControlMoveToGoal.

/**
 * Test moving to the goal
 *
 * (40, 40)
 * 			(50,50)
 * (40, 60)
 *
 * @throws SpaceSettlersActionException
 */
@Test
public void testpdControlMoveToGoal() throws SpaceSettlersActionException {
    // first to -3pi/4
    Position currentLoc = new Position(50, 50);
    Position goalLoc = new Position(40, 40);
    currentLoc.setOrientation(-(3 * Math.PI) / 4);
    moveAction = new MoveAction();
    Vector2D accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    Movement movement = new Movement();
    while (accel.getMagnitude() > MoveAction.TARGET_REACHED_ACCEL) {
        movement.setTranslationalAcceleration(accel);
        currentLoc = space.applyMovement(currentLoc, movement, timestep);
        accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    }
    assertEquals(currentLoc.getOrientation(), -(3 * Math.PI) / 4, 0.01);
    assertEquals(currentLoc.getX(), 40, 0.05);
    assertEquals(currentLoc.getY(), 40, 0.05);
    // then to 3pi/4
    currentLoc = new Position(50, 50);
    currentLoc.setOrientation(0);
    goalLoc = new Position(40, 60);
    currentLoc.setOrientation((3 * Math.PI) / 4);
    accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    while (accel.getMagnitude() > MoveAction.TARGET_REACHED_ACCEL) {
        movement.setTranslationalAcceleration(accel);
        currentLoc = space.applyMovement(currentLoc, movement, timestep);
        accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    }
    assertEquals(currentLoc.getOrientation(), (3 * Math.PI) / 4, 0.01);
    assertEquals(currentLoc.getX(), 40, 0.05);
    assertEquals(currentLoc.getY(), 60, 0.05);
}

Example 30 with Vector2D

use of spacesettlers.utilities.Vector2D in project spacesettlers by amymcgovern.

the class TestMoveAction method testpdControlMoveToAlongX.

/**
 * Test moving to the goal
 *
 * (30, 50) 	(50,50)  (70, 50)
 *
 * @throws SpaceSettlersActionException
 */
@Test
public void testpdControlMoveToAlongX() throws SpaceSettlersActionException {
    // first positive x (60,50)
    Position currentLoc = new Position(50, 50);
    Position goalLoc = new Position(70, 50);
    currentLoc.setOrientation(0);
    moveAction = new MoveAction();
    Vector2D accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    Movement movement = new Movement();
    while (accel.getMagnitude() > MoveAction.TARGET_REACHED_ACCEL) {
        movement.setTranslationalAcceleration(accel);
        currentLoc = space.applyMovement(currentLoc, movement, timestep);
        accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    }
    assertEquals(currentLoc.getOrientation(), 0, 0.01);
    assertEquals(currentLoc.getX(), 70, 0.05);
    assertEquals(currentLoc.getY(), 50, 0.05);
    // then to the negative x
    currentLoc = new Position(50, 50);
    currentLoc.setOrientation(0);
    goalLoc = new Position(30, 50);
    currentLoc.setOrientation(-Math.PI);
    accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    while (accel.getMagnitude() > MoveAction.TARGET_REACHED_ACCEL) {
        movement.setTranslationalAcceleration(accel);
        currentLoc = space.applyMovement(currentLoc, movement, timestep);
        accel = moveAction.pdControlMoveToGoal(space, goalLoc, currentLoc, targetVelocity);
    }
    assertEquals(currentLoc.getOrientation(), -Math.PI, 0.01);
    assertEquals(currentLoc.getX(), 30, 0.05);
    assertEquals(currentLoc.getY(), 50, 0.05);
}