如何解决libgdx 和 stage 的相机问题
我不久前开始使用 libgdx，有一次我开始使用带有舞台的相机，但遇到了很多问题：
2)如果我画一个没有舞台的精灵，触摸不会移动它（它应该移动到我触摸的地方），尽管它可以很好地移动圆形演员。
3)camera.zoom/stage.getCamera().zoom eps 似乎没有任何效果，除了使触摸变得更糟之外，甚至现在连圆圈都不会移动到触摸。
这是代码，它是一个屏幕类，我只是通过 changeScreen 与游戏类一起运行。我在安卓设备上测试过。 TheWorld.jpeg 是一个 1024x576 的图像，如果这意味着什么的话。
如果我的问题不清楚，请告诉我。
import com.badlogic.gdx.Gdx;
//import com.badlogic.gdx.
import com.badlogic.gdx.scenes.scene2d.*;
import com.badlogic.gdx.graphics.glutils.*;
import com.badlogic.gdx.graphics.g2d.*;
import com.badlogic.gdx.*;
import com.badlogic.gdx.graphics.*;
import com.badlogic.gdx.utils.viewport.*;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.math.Vector3;
import android.graphics.drawable.shapes.*;
class Shape extends Actor {
public ShapeRenderer shapeRenderer;
float x,y;
public Shape(int xp,int yp){
shapeRenderer = new ShapeRenderer();
x = xp;
y = yp;
}
@Override
public void draw(Batch batch,float delta){
shapeRenderer.begin(ShapeRenderer.ShapeType.Filled);
shapeRenderer.setColor(0,1,1);
shapeRenderer.circle(this.x,this.y,75);
shapeRenderer.end();
}
}
class Drawing extends Actor {
private Sprite tex;
private Shape shape;
public Texture textureBackground;
private Stage stage;
public ShapeRenderer shapeRenderer;
public Drawing(Sprite t,Shape s,Stage ss){
tex = t;
shape = s;
stage = ss;
shapeRenderer = new ShapeRenderer();
}
@Override
public void draw(Batch batch,float delta) {
tex.draw(stage.getBatch());
shapeRenderer.begin(ShapeRenderer.ShapeType.Filled);
shapeRenderer.setColor(1,1);
shapeRenderer.circle(shape.x,shape.y,90);
shapeRenderer.end();
batch.draw(textureBackground,shape.x,50,50);
//theWorld.draw(stage.getBatch());
}
}
public class Screen01 implements Screen,InputProcessor
{
//Stage stage;
Shape shape;
MyGdxGame parent;
public OrthographicCamera camera;
private Stage stage;
private Viewport viewport;
private Texture textureBackground;
private Sprite theWorld;
//size I use to test
private static final int WORLD_WIDTH = 400;
private static final int WORLD_HEIGHT = 400;
private Drawing tex;
public Screen01(MyGdxGame game){
camera = new OrthographicCamera(WORLD_WIDTH,WORLD_HEIGHT);
camera.position.set(camera.viewportWidth / 2,camera.viewportHeight / 2,0);
viewport = new StretchViewport(WORLD_WIDTH,WORLD_HEIGHT,camera);
stage = new Stage(viewport);
stage.getViewport().apply();
Gdx.input.setInputProcessor(this);
textureBackground = new Texture("TheWorld.jpeg");
theWorld = new Sprite(textureBackground);//new Texture(Gdx.files.internal("TheWorld.png")));
theWorld.setPosition(0,0);
/*stage = new Stage(
new StretchViewport(
Gdx.graphics.getWidth(),Gdx.graphics.getHeight()
)
);*/
shape = new Shape(30,30);
tex = new Drawing(theWorld,shape,stage);
tex.textureBackground = textureBackground;
parent = game;
stage.addActor(shape);
stage.addActor(tex);
}
@Override
public void show() {
stage.addActor(shape);
stage.addActor(tex);
//Gdx.input.setInputProcessor(stage);
// Todo Auto-generated method stub
}
@Override
public void render(float delta) {
Gdx.gl.glClearColor(.25f,.25f,1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
stage.getBatch().setProjectionMatrix(stage.getCamera().combined);
stage.getCamera().update();
stage.getBatch().begin();
//if I do it like this it will draw
//stage.getBatch().draw(textureBackground,10,10);
stage.getBatch().end();
stage.act(Gdx.graphics.getDeltaTime());
stage.draw();
//still doesn't draw
tex.draw(stage.getBatch(),0);
// Todo Auto-generated method stub
}
@Override
public void resize(int width,int height) {
stage.getViewport().update(width,height);
stage.getCamera().viewportWidth = WORLD_WIDTH;
stage.getCamera().viewportHeight = WORLD_HEIGHT * height / width;
stage.getCamera().position.set(stage.getCamera().viewportWidth / 2,stage.getCamera().viewportHeight / 2,0);
stage.getCamera().update();
}
@Override
public void pause() {
// camera.zoom -= 2;
// Todo Auto-generated method stub
}
@Override
public boolean touchDown(int screenX,int screenY,int pointer,int button) {
Vector3 worldCoordinates = camera.unproject(
new Vector3(screenX,screenY,0),viewport.getScreenX(),viewport.getScreenY(),camera.viewportWidth,camera.viewportHeight);
//camera.zoom++;
//worldCoordinates = viewport.unproject(worldCoordinates);
//this works with normal zoom
shape.x = (worldCoordinates.x);
shape.y = (worldCoordinates.y);
//this doesn't work
theWorld.setPosition(worldCoordinates.x,worldCoordinates.y);
//theWorld.setCenter(worldCoordinates.x-theWorld.getWidth()/2
//,worldCoordinates.y-theWorld.getHeight()/2);
//camera.zoom++;
return false;
}
@Override
public void resume() {
// Todo Auto-generated method stub
}
@Override
public void hide() {
// Todo Auto-generated method stub
}
@Override
public void dispose() {
stage.dispose();
}
@Override
public boolean keyDown(int keycode) {
return false;
}
@Override
public boolean keyUp(int keycode) {
return false;
}
@Override
public boolean keyTyped(char character) {
return false;
}
@Override
public boolean touchUp(int screenX,int button) {
return false;
}
@Override
public boolean touchDragged(int screenX,int pointer) {
return false;
}
@Override
public boolean mouseMoved(int screenX,int screenY) {
return false;
}
@Override
public boolean scrolled(int amount) {
return false;
}
}```[TheWorld.jpeg][1]
[1]: https://i.stack.imgur.com/e63AT.jpg
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