I need to create some simple effects for the layers which I have created in my playN game. For instance, a layer starts as a line, resize on update, and thus slowly expands to full screen. Can I use triple play for this?
For example: we can use setAlpha in update function to make a fading effect.
check out the Animator class from tripleplay, does exactly that
code snippet:
class MyGame extends Game {
private Animator anim;
private float _elapsed = 0;
public void init() {
anim = Animator.create();
anim.tweenScale(aLayer).from(0).to(50).linear();
}
public void paint(float alpha) {
anim.update(_elapsed + alpha * updateRate());
}
public void update(float delta) {
_elapsed += delta;
}
}
Related
i'm trying to add a script to the Player sprite but Unity gives me this error, can you help me?
using System.Collections;
using UnityEngine;
[RequireComponent (typeof (RigidBody2D))]
public class PlayerMovement : MonoBehaviour
{
RigidBody2D body;
//Upgradable Variables
float moveSpeed = 3f;
// Start is called before the first frame update
void Start () {
body = GetComponent<RigidBody2D>();
}
// Update is called once per frame
void Update () {
Movement();
}
void Movement()
{
float h = Input.GetAxis("Horizontal");
Vector2 velocity = new Vector2(Vector2.right.x * moveSpeed * h, body.velocity.y);
body.velocity = velocity;
}
}
Do you perhaps mean Rigidbody2D? The 'b' should not be capitalised.
You are trying to add "CallbackExecutor" script, not PlayerMovement one.
Make sure the class inherits MonoBehavior. And its type (PlayerMovement) matches its file name (PlayerMovement.cs).
I am searching for a way to animate the dots between two markers on a google map in android device.
So what i want in the end is the following line between the two images:
and it would be used like this typical google polyline implementation:
lets say there is a point A and a Point B. if im directing the user to point B, then the line animates to from point A to point B so the user knows to walk in this direction.
to achieve this i thought i could get the points out of the polyLine and remove them and add them back
rapidily. so lets say i had 5 points in the polyLine, i would remove position 1 , then put it back, then remove position 2, and put it back, to simulate this animation.
but it does not work . once hte polyline is set it seems i cannot alter it. you have any suggestions ?
val dotPattern = Arrays.asList(Dot(), Gap(convertDpToPixel(7).toFloat()))
val polyLineOptions: PolylineOptions = PolylineOptions()
.add(usersLocation)
.add(users_destination)
.pattern(dotPattern)
.width(convertDpToPixel(6).toFloat())
dottedPolyLine = googleMap.addPolyline(polyLineOptions)
dottedPolyLine?.points?.removeAt(1) // here as a test if my idea i try removing a point but it looks like a point here means current location or destination so there always 2. i thought a point would be one of the dots.
You can use MapView-based custom view View Canvas animationlike in this answer:
This approach requires
MapView-based
custom
view,
that implements:
drawing over the MapView canvas;
customizing line styles (circles instead of a simple line);
binding path to Lat/Lon coordinates of map
performing animation.
Drawing over the MapView needs to override dispatchDraw().
Customizing line styles needs
setPathEffect()
method of
Paint
class that allows to create create path for "circle stamp" (in
pixels), which will repeated every "advance" (in pixels too),
something like that:
mCircleStampPath = new Path(); mCircleStampPath.addCircle(0,0,
CIRCLE_RADIUS, Path.Direction.CCW); mCircleStampPath.close();
For binding path on screen to Lat/Lon coordinates
Projection.toScreenLocation()
needed, that requires
GoogleMap
object so custom view should implements OnMapReadyCallback for
receive it. For continuous animation
postInvalidateDelayed()
can be used.
but not draw path directly from point A to point B, but from point A to point C that animated from A to B. To get current position of point C you can use SphericalUtil.interpolate() from Google Maps Android API Utility Library. Something like that:
public class EnhancedMapView extends MapView implements OnMapReadyCallback {
private static final float CIRCLE_RADIUS = 10;
private static final float CIRCLE_ADVANCE = 3.5f * CIRCLE_RADIUS; // spacing between each circle stamp
private static final int FRAMES_PER_SECOND = 30;
private static final int ANIMATION_DURATION = 10000;
private OnMapReadyCallback mMapReadyCallback;
private GoogleMap mGoogleMap;
private LatLng mPointA;
private LatLng mPointB;
private LatLng mPointC;
private float mCirclePhase = 0; // amount to offset before the first circle is stamped
private Path mCircleStampPath;
private Paint mPaintLine;
private final Path mPathFromAtoC = new Path();
private long mStartTime;
private long mElapsedTime;
public EnhancedMapView(#NonNull Context context) {
super(context);
init();
}
public EnhancedMapView(#NonNull Context context, #Nullable AttributeSet attrs) {
super(context, attrs);
init();
}
public EnhancedMapView(#NonNull Context context, #Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init();
}
public EnhancedMapView(#NonNull Context context, #Nullable GoogleMapOptions options) {
super(context, options);
init();
}
#Override
public void dispatchDraw(Canvas canvas) {
super.dispatchDraw(canvas);
canvas.save();
drawLineFomAtoB(canvas);
canvas.restore();
// perform one shot animation
mElapsedTime = System.currentTimeMillis() - mStartTime;
if (mElapsedTime < ANIMATION_DURATION) {
postInvalidateDelayed(1000 / FRAMES_PER_SECOND);
}
}
private void drawLineFomAtoB(Canvas canvas) {
if (mGoogleMap == null || mPointA == null || mPointB == null) {
return;
}
// interpolate current position
mPointC = SphericalUtil.interpolate(mPointA, mPointB, (float) mElapsedTime / (float)ANIMATION_DURATION);
final Projection mapProjection = mGoogleMap.getProjection();
final Point pointA = mapProjection.toScreenLocation(mPointA);
final Point pointC = mapProjection.toScreenLocation(mPointC);
mPathFromAtoC.rewind();
mPathFromAtoC.moveTo(pointC.x, pointC.y);
mPathFromAtoC.lineTo(pointA.x, pointA.y);
// change phase for circles shift
mCirclePhase = (mCirclePhase < CIRCLE_ADVANCE)
? mCirclePhase + 1.0f
: 0;
mPaintLine.setPathEffect(new PathDashPathEffect(mCircleStampPath, CIRCLE_ADVANCE, mCirclePhase, PathDashPathEffect.Style.ROTATE));
canvas.drawPath(mPathFromAtoC, mPaintLine);
}
private void init() {
setWillNotDraw(false);
mCircleStampPath = new Path();
mCircleStampPath.addCircle(0,0, CIRCLE_RADIUS, Path.Direction.CCW);
mCircleStampPath.close();
mPaintLine = new Paint();
mPaintLine.setColor(Color.BLACK);
mPaintLine.setStrokeWidth(1);
mPaintLine.setStyle(Paint.Style.STROKE);
mPaintLine.setPathEffect(new PathDashPathEffect(mCircleStampPath, CIRCLE_ADVANCE, mCirclePhase, PathDashPathEffect.Style.ROTATE));
// start animation
mStartTime = System.currentTimeMillis();
postInvalidate();
}
#Override
public void getMapAsync(OnMapReadyCallback callback) {
mMapReadyCallback = callback;
super.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
mGoogleMap.setOnCameraMoveListener(new GoogleMap.OnCameraMoveListener() {
#Override
public void onCameraMove() {
invalidate();
}
});
if (mMapReadyCallback != null) {
mMapReadyCallback.onMapReady(googleMap);
}
}
public void setPoints(LatLng pointA, LatLng pointB) {
mPointA = pointA;
mPointB = pointB;
}
}
NB! This is just idea, not full tested code.
I'm revisiting LibGDX game programming and I am unfortunately having to re-learn stuff I used to know.
I'm currently using Tiled Map Editor to make a very simple Donkey Kong style level. I have around 20 rectangles in total for the level.
I've created a box2d world in my main GameScreen class and have a for loop to get the rectangle objects into the world and debugrenderer.
My problem is that only the bottom (and first) rectangle I drew is showing up. I have checked the scale, also I put a println() which tells me the object information has been parsed with all the rectangles info showing correct (ie. the rectangles x,y,w,h values) but as I say, only one rectangle shows up on the debugrenderer.
I've just got back into programming after around 6month break and so I'm hoping i've missed something simple. The same code in my old projects still works fine as I've tested some.
Here is my code, any help is massively appreciated. Thanks
public class GameScreen implements Screen {
SpriteBatch spriteBatch;
OrthographicCamera cam;
Viewport v;
TmxMapLoader mapLoader;
TiledMap map;
OrthogonalTiledMapRenderer mapRenderer;
World world;
Box2DDebugRenderer b2dr;
float mapScale = 10f/140f;
public GameScreen(){
spriteBatch = new SpriteBatch();
cam = new OrthographicCamera();
v = new FitViewport(Constants.V_WIDTH, Constants.V_HEIGHT, cam);
cam.setToOrtho(false, v.getWorldWidth(), v.getWorldHeight());
mapLoader = new TmxMapLoader();
map = mapLoader.load("level1.tmx");
mapRenderer = new OrthogonalTiledMapRenderer(map, mapScale);
world = new World(new Vector2(0,-9.8f), true);
b2dr = new Box2DDebugRenderer();
// box2d local variables
BodyDef bdef = new BodyDef();
PolygonShape shape = new PolygonShape();
FixtureDef fdef = new FixtureDef();
Body body;
// create platform object rectangles
for (MapObject object : map.getLayers().get(2).getObjects().getByType(RectangleMapObject.class)){
Rectangle rect = ((RectangleMapObject)object).getRectangle();
bdef.type = BodyDef.BodyType.StaticBody;
bdef.position.set(rect.getX() + rect.getWidth() / 2 * mapScale, rect.y + rect.getHeight() / 2 * mapScale);
body = world.createBody(bdef);
shape.setAsBox(rect.getWidth() / 2 * mapScale, rect.getHeight() / 2 * mapScale);
fdef.shape = shape;
body.createFixture(fdef);
}
}
#Override
public void show() {
}
#Override
public void render(float delta) {
update(delta);
clearScreen();
draw();
}
public void update(float dt){
mapRenderer.setView(cam);
}
public void clearScreen(){
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
}
public void draw(){
spriteBatch.setProjectionMatrix(cam.combined);
mapRenderer.render();
b2dr.render(world, cam.combined);
spriteBatch.begin();
spriteBatch.end();
}
#Override
public void resize(int width, int height) {
v.update(width, height);
}
#Override
public void pause() {
}
#Override
public void resume() {
}
#Override
public void hide() {
}
#Override
public void dispose() {
spriteBatch.dispose();
}
}
Sorry for wasting time here. I have fixed this.
It was just that I hadnt applied the scale of the map also to the x,y of the rectangles. So i change one line like so, and now it works:
bdef.position.set(rect.getX() * mapScale + rect.getWidth() / 2 * mapScale, rect.y * mapScale + rect.getHeight() / 2 * mapScale);
Let's go straight to an example. Let's say we have:
Update(){
if (value.Equals("circular")) moveGameObjectInACircularWay();
else if (value.Equals("linear")) moveGameObjectInALinearWay();
}
I think that is not very elegant solution. Unity needs to perform a comparison every frame. That does not sound very optimal to me. I'm just guessing it should be some other way to implement the same like:
Start () {
if (value.Equals("circular")) movement += moveGameObjectInACircularWay;
else if (value.Equals("linear")) movement += moveGameObjectInALinearWay;
}
Update () {
movement();
}
I guess the solution is related with delegates. That's why my proposed solution looks like delegates. I don't understand what delegates are well yet.
From MSDN "A delegate in C# is similar to a function pointer in C or C++. Using a delegate allows the programmer to encapsulate a reference to a method inside a delegate object." (https://msdn.microsoft.com/en-us/library/aa288459(v=vs.71).aspx) In short is a pointer to a method. What you want to do is the following:
using UnityEngine;
using System.Collections;
public delegate void MovementDelegate();
public class Movement : MonoBehaviour {
MovementDelegate movementFunction=null;
public string value = "linear";
void Start () {
if (value.Equals("circular")) movementFunction = moveGameObjectInACircularWay;
else if (value.Equals("linear")) movementFunction = moveGameObjectInALinearWay;
}
// Update is called once per frame
void Update()
{
if (movementFunction != null)
{
movementFunction();
}
}
void moveGameObjectInACircularWay()
{
Debug.Log("do circular movement here");
}
void moveGameObjectInALinearWay()
{
Debug.Log("do linear movement here");
}
}
The functions you declare must have the same signature as the delegate signature. If you want to add parameters to it, ex. an int, decalre your delegate as
public delegate void MovementDelegate(int speed);
and your implementation functions as
void moveGameObjectInACircularWay(int speed)
void moveGameObjectInALinearWay(int speed)
and change the call to
movementFunction(yourIntHere)
UPDATED!: Thanks to Joe Blow suggestion here is another solution:
public class Movement : MonoBehaviour
{
Action<int> movementFunction = null;
public string value = "linear";
void Start()
{
if (value.Equals("circular")) movementFunction = moveGameObjectInACircularWay;
else if (value.Equals("linear")) movementFunction = moveGameObjectInALinearWay;
}
// Update is called once per frame
void Update()
{
if (movementFunction != null)
{
movementFunction(2);
}
}
void moveGameObjectInACircularWay(int speed)
{
Debug.Log("do circular movement here "+ speed);
}
void moveGameObjectInALinearWay(int speed)
{
Debug.Log("do linear movement here " + speed);
}
}
My favorite answer has been written by Joe Blow in the comments:
Unity is components based. We better switch to Component-Based Thinking instead working with delegates.
So make two (or more) different scripts, and put those on the game object in question. Then, turn on and off these components as you wish.
So we would have to scripts added to our game object: MoveGameObjectInACircularWay.cs and MoveGameObjectInALinearWay.cs. Then a MainGameObjectScript.cs also added to our game object with the following code:
void Start () {
GetComponent()<MoveGameObjectInACircularWay>.active = true;
GetComponent()<MoveGameObjectInALinearWay>.active = false;
}
I'm currently having a problem in my asyntask. When the progress bar has start and once I rotate the screen, the progress bar disappear and the activity restart. I am trying to use
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR);
but What if my AsyncTask is not in my activity... Its in another class file common to many activity class. Then how can I get setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR); Thanks for anyone who will help.
this works in my app. I put this line in the manifest.
**android:configChanges="orientation|screenSize"**
Here is my solution to this problem:
#Override
protected void onPreExecute() {
Device.lockOrientation((Activity)context);
...
}
#Override
protected void onPostExecute(List<Hydrant> hydrants) {
Device.releaseOrientation((Activity)context);
...
}
The Device implementation:
public class Device {
public static void lockOrientation(Activity activity) {
Display display = ((WindowManager) activity.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int rotation = display.getRotation();
int tempOrientation = activity.getResources().getConfiguration().orientation;
int orientation = 0;
switch(tempOrientation)
{
case Configuration.ORIENTATION_LANDSCAPE:
if(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_90)
orientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
else
orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
break;
case Configuration.ORIENTATION_PORTRAIT:
if(rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_270)
orientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
else
orientation = ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
}
activity.setRequestedOrientation(orientation);
}
public static void releaseOrientation(Activity activity) {
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}
}
As AsyncTasks are only meant to run for a few seconds, this is an acceptable solution to me as this rarely will affect a user. Especially with something as a ProgressDialog giving a nice indication of how long she will have to wait.