I managed to pack a textureatlas with images i have and it works properly in that it creates the .pack file and the .png file. The issue is when i load the texture atlas and try to assign AtlasRegions. it loads the entire atlas instead of only the image i want. here is a mockup code i used to test it.
#Override
public void create() {
camera = new OrthographicCamera(800, 480);
batch = new SpriteBatch();
test = new TextureAtlas(Gdx.files.internal("polytest.png"));
sprite = test.findRegion("hero");
texture = new Texture(Gdx.files.internal("data/libgdx.png"));
texture.setFilter(TextureFilter.Linear, TextureFilter.Linear);
}
#Override
public void render() {
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
batch.setProjectionMatrix(camera.combined);
batch.begin();
batch.draw(sprite.getTexture(), 10, 10);
batch.end();
}
this renders the entire atlas instead of only the image called "hero" in the atlas. Why does this happen?
Thanks in advance.
When you do.-
batch.draw(sprite.getTexture(), 10, 10);
you're actually telling libgdx to render the whole Texture. What you need is to draw just the TextureRegion.-
batch.draw(sprite, 10, 10);
Related
I was trying to create a dynamic array containing sprites, that created from pixmap textures. I want to give randomly different colors to this array elements also.
None is working.
Then I tried to create a single pixmap. That also shows same behavior.
I created a pixmap in show() like this:
pixmap = new Pixmap(128, 128, Format.RGBA8888);
Pixmap.setBlending(Pixmap.Blending.None);
pixmap.setColor(128, 0, 0, 1f);
pixmap.fillCircle(64, 64, 64);
texture = new Texture(pixmap);
pixmap.dispose();
in render()
sprite = new Sprite(texture);
sprite.setPosition(b.getX()-sprite.getWidth()/2, b.getY()-sprite.getHeight()/2);
sprite.draw(batch);
Whenever I give an rgb color code, it gives either some different colors or black as output. Tried hex code also.
What wrong I did here?
Previousely I used pixmaps as overlay and single texture etc. But did not go deep in to it and tried.
Here, I planned to draw filled circles with pixmap, instead of using graphics. Because my game elements are very simple filled circles and more than 10 colors I should implement.
These circle objects will be generated dynamically throughout the game.
Now I am wondering what I planned to do will be effective with pixmaps. No exapmples I found on net.
Is it possible to create dynamic array with different colored objects?
Or using graphics is the better option compared to pixmaps?
It would be very helpful if I get suggestions from experienced persons.
r,g,b,a values should be in range from 0f to 1f. And it's bad to create new sprites in render(), since it's called every frame.
I'll try to answer your questions with this small code sample (left comments in the code):
public class MyGdxGame extends ApplicationAdapter {
SpriteBatch spriteBatch;
Pixmap pixmap;
Texture texture;
Array<Sprite> sprites = new Array<Sprite>();
#Override
public void create() {
spriteBatch = new SpriteBatch();
// you should use only one Pixmap object and one Texture object
pixmap = new Pixmap(128, 128, Pixmap.Format.RGBA8888);
pixmap.setBlending(Pixmap.Blending.None);
pixmap.setColor(Color.WHITE);
pixmap.fillCircle(64, 64, 64);
texture = new Texture(pixmap);
pixmap.dispose();
// generate sprites with different colors
// r,g,b,a values should be in range from 0f to 1f
addCircleSprite(128f / 255f, 0f, 0f, 1f);
addCircleSprite(0.4f, 0.2f, 0.5f, 1f);
addCircleSprite(0.6f, 0f, 1f, 1f);
addCircleSprite(0.3f, 0.8f, 1f, 1f);
addCircleSprite(0.1f, 1f, 1f, 1f);
}
void addCircleSprite(float r, float g, float b, float a) {
// every sprite references on the same Texture object
Sprite sprite = new Sprite(texture);
sprite.setColor(r, g, b, a);
// I just set random positions, but you should handle them differently of course
sprite.setCenter(
MathUtils.random(Gdx.graphics.getWidth()),
MathUtils.random(Gdx.graphics.getHeight()));
sprites.add(sprite);
}
#Override
public void render() {
Gdx.gl.glClearColor(0f, 0f, 0f, 1f);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
spriteBatch.begin();
for (Sprite sprite : sprites) {
sprite.draw(spriteBatch);
}
spriteBatch.end();
}
#Override
public void dispose() {
texture.dispose();
}
}
also read this Q/A. I guess you could load your Texture object from .png file with white circle:
texture = new Texture("whiteCircle.png");
but creating Pixmap circle with only 64 pixels in radius (and then creating a Texture from it) is ok too, shouldn't make much difference.
setColor() takes r, g, b, a parameters to convert it to rgba8888 format -
public void setColor (float r, float g, float b, float a) {
color = Color.rgba8888(r, g, b, a);
}
So set r, g, b and alpha component as floats in the range [0,1].
use
pixmap.setColor(128f/255, 0, 0, 1f);
instead of
pixmap.setColor(128, 0, 0, 1f);
If you want to use hex then -
Color color = new Color(0x000000a6) //(Black with 65% alpha).
I am working on a game using LIBGDX. I am following tutorial from this . Everything works perfectly fine but my output sprite is at the top right corner of the screen. I am trying to center it around but I am not able to ! I even adjusted the camera but I failed.
This is my part of screen code,
public PlayScreen(MyGame game) {
this.game = game;
this.gamecam = new OrthographicCamera();
this.gamePort = new FitViewport(MyX.V_WIDTH / MyXGame.PPM, MyX.V_HEIGHT / MyXGame.PPM, gamecam);
this.hud = new HudClass(game.batch);
loader = new TmxMapLoader();
map = loader.load("tiledmap.tmx");
renderer = new OrthogonalTiledMapRenderer(map, 1 / MyJungleGame.PPM);
gamecam.position.set(gamePort.getWorldWidth() / 2, gamePort.getWorldHeight() / 2, 0);
world = new World(new Vector2(0, -10), true);
b2dr = new Box2DDebugRenderer();
creator = new B2WorldCreator(this);
gamehero = new Hero(this);
world.setContactListener(new WorldContactListener());
items = new Array<Item>(); //initializing things
itemsToSpawn = new LinkedBlockingQueue<ItemDef>();
}
My render method,
public void render(float delta) {
this.update(delta);
Gdx.gl.glClearColor(1, 0, 0, 0);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
renderer.render();
b2dr.render(world, gamecam.combined);
game.batch.setProjectionMatrix(this.gamecam.combined);
game.batch.begin();
gamehero.draw(game.batch);
for (Goomba enemy : creator.getGoombas())
enemy.draw(game.batch);
for(Item item :items)
item.draw(game.batch);
game.batch.end();
game.batch.setProjectionMatrix(hud.stage.getCamera().combined);
hud.stage.draw();
}
I have attached the screen shot of the output .
To my knowledge, problem lies in setting up the camera in playscreen. But I don't know how to resolve it. Please help I am new to LIBGDX. Thanks in advance.
https://github.com/libgdx/libgdx/wiki/Orthographic-camera
This is the best help that I can give to you. Hope that it helps. Also, I would encourage you to write and design better you code, it is somehow a little bit hard to read.
Cheers.
I have two stages, one for the background image (using FillViewport to stretch the image)
Another one use Fitviewport to display game objects.
How do I remove the blackbars to display the background of the first stage ?
I tried Extendviewport for second stages but it will show the gap at the right for 1280x720 devices (how could I split the gap to left ?)
public LoginScreen(final MyGame gam) {
game = gam;
stageBG = new Stage(new FillViewport(800, 480));
textureBackground = new Texture(Gdx.files.internal("background.png"));
stageBG.addActor(new Image(textureBackground));
stage = new Stage(new ExtendViewport(640, 480, 1280, 720));
table = new Table();
textureLoginArea = new Texture(Gdx.files.internal("login-area.png"));
textureGirlGreen = new Texture(Gdx.files.internal("girl-green.png"));
Gdx.input.setInputProcessor(stage);
table.setBounds(415, 15, 374, 459);
table.setBackground(new TextureRegionDrawable(new TextureRegion(textureLoginArea)));
stage.addActor(table);
}
#Override
public void render(float v) {
stageBG.act(Gdx.graphics.getDeltaTime());
stageBG.draw();
stage.act(Gdx.graphics.getDeltaTime());
stage.getBatch().begin();
stage.getBatch().draw(textureGirlGreen, 120, 0);
stage.getBatch().end();
stage.draw();
}
#Override
public void resize(int width, int height) {
stageBG.getViewport().update(width, height, true);
stage.getViewport().update(width, height, true);
}
I think you should avoid using two stages with different viewports. You will get into more trouble. If you want a background image with an login overlay you should just use scene2d. Or just use two stages with the same viewport and scale your overlay manually.
However you could use frame buffers with blending to overdraw the black bars.
I have a image background size 480 * 800. I use texturepacker to create .pack file.
I try to display background into screen but background display very small and not fit screen device. Please help me display background correctly. Thanks
You need to simply adjust the image's size:
private SpriteBatch spriteBatch;
private Texture texture;
private Sprite textureSprite;
public void show(){ // It might also be called create();
spriteBatch = new SpriteBatch();
texture = new Texture(Gdx.files.internal("location of img in assets folder"));
textureSprite = new Sprite(texture);
//Set the image width/height to the width/height of the screen.
textureSprite.setBounds(0,0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
}
public void render(float delta) {
Gdx.gl.glClearColor(0, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
// Clear the screen every loop
spriteBatch.begin();
textureSprite.draw(spriteBatch);
spriteBatch.end();
}
I develope a 2D game and use OrthographicCamera and Viewport to resize virtaul board to real display size. I add images to stage and use ClickListener to detect clicks. It works fine, but when I change resolution it works incorrent(can't detect correct actor, I think the problem with new and original x and y). Is there any way to fix this?
You will need to translate the screen coordinates to world coordinates.
Your camera can do that. You can do both ways, cam.project(...) and cam.unproject(...)
Or if you are already using Actors, don't initialize a camera yourself, but use a Stage. Create a Stage and add the actors to it. The Stage will then do coordinate translation for you.
Once me too suffered from this problem but at end i got the working solution, for drawing anything using SpriteBatch or Stage in libgdx. Using orthogrphic camera we can do this.
first choose one constant resolution which is best for game. Here i have taken 1280*720(landscape).
class ScreenTest implements Screen{
final float appWidth = 1280, screenWidth = Gdx.graphics.getWidth();
final float appHeight = 720, screenHeight = Gdx.graphics.getHeight();
OrthographicCamera camera;
SpriteBatch batch;
Stage stage;
Texture img1;
Image img2;
public ScreenTest(){
camera = new OrthographicCamera();
camera.setToOrtho(false, appWidth, appHeight);
batch = new SpriteBatch();
batch.setProjectionMatrix(camera.combined);
img1 = new Texture("your_image1.png");
img2 = new Image(new Texture("your_image2.png"));
img2.setPosition(0, 0); // drawing from (0,0)
stage = new Stage(new StretchViewport(appWidth, appHeight, camera));
stage.addActor(img2);
}
#Override
public void render(float delta) {
Gdx.gl.glClearColor(1, 0, 0, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
batch.begin();
batch.draw(img, 0, 0);
batch.end();
stage.act();
stage.act(delta);
stage.draw();
// Also You can get touch input according to your Screen.
if (Gdx.input.isTouched()) {
System.out.println(" X " + Gdx.input.getX() * (appWidth / screenWidth));
System.out.println(" Y " + Gdx.input.getY() * (appHeight / screenHeight));
}
}
//
:
:
//
}
run this code in Any type of resolution it will going to adjust in that resolution without any disturbance.
I just think Stage is easy to use.
If there are some wrong,i consider you should check your code:
public Actor hit(float x, float y)