[英]LibGDX: How to get the same coordinates in tiled map for tile with and without zoom
我是LibGDX的初學者。 我正在嘗試基於固定大小的平鋪地圖(33x21平鋪)創建一個Android游戲。 我正在使用的圖塊是32x32px。 到目前為止,我設法加載了Tiled創建的地圖,並添加了諸如放大/縮小和平移之類的觸摸手勢。 游戲角色的移動將逐個回合進行,因此我需要選擇特定的回合以執行一些動作。 我從這里嘗試了解決方案: LibGDX:如何使平鋪的地圖圖塊可點擊? 並且效果很好,直到沒有放大屏幕為止。
如果沒有縮放,則左下角坐標顯示為(0,0),這是正確的。 當我放大時,地圖可見部分的左下角而不是保持正確的坐標(即(480,320)),而是再次變為(0,0)。 我嘗試使用camera.unproject(Vector3),但未成功。 可能用錯了。 我也沒有真正確信,我嘗試獲取瓷磚的方法是最合適的方法。 您能幫我正確地獲得瓷磚坐標嗎? 下面是我正在使用的代碼:
public class TiledTest extends ApplicationAdapter {
public TiledMap tiledMap;
OrthographicCamera camera;
TiledMapRenderer tiledMapRenderer;
GestureDetector gesture;
InputMultiplexer myInputMultiplexer;
float w = Gdx.graphics.getWidth();
float h = Gdx.graphics.getHeight();
public static final float PAN_RATE = (float) 0.01;
private static final float ZOOM_SPEED = (float) 0.009;
int columns, rows;
TiledMapTileLayer grid_layer;
@Override
public void create () {
gesture =new GestureDetector(new MyGestureListener());
myInputMultiplexer = new InputMultiplexer();
float unitScale = 1 / 32f;
camera = new OrthographicCamera();
camera.setToOrtho(true, 33,21);
tiledMap = new TmxMapLoader().load("tiled_map.tmx");
tiledMapRenderer = new OrthogonalTiledMapRenderer(tiledMap, unitScale);
grid_layer = (TiledMapTileLayer)tiledMap.getLayers().get(0);
Stage stage = new TiledMapStage(tiledMap);
myInputMultiplexer.addProcessor(gesture);
myInputMultiplexer.addProcessor(stage);
Gdx.input.setInputProcessor(myInputMultiplexer);
}
@Override
public void render () {
tiledMapRenderer.setView(camera);
tiledMapRenderer.render();
camera.update();
}
public class TiledMapActor extends Actor {
private TiledMapTileLayer.Cell cell;
public TiledMapActor(TiledMap tileMap, TiledMapTileLayer tiledLayer, TiledMapTileLayer.Cell cell) {
tiledMap = tileMap;
grid_layer = tiledLayer;
this.cell = cell;
}
}
public class TiledMapClickListener extends ClickListener {
private TiledMapActor actor;
public TiledMapClickListener(TiledMapActor actor) {
this.actor = actor;
}
@Override
public void clicked(InputEvent event, float x, float y) {
int a = (int) actor.getX();
int b = (int) actor.getY();
System.out.println(actor.cell + " has been clicked.");
System.out.println("x = " + a + "y = " + b );
}
}
public class TiledMapStage extends Stage {
private TiledMap tiledMap;
public TiledMapStage(TiledMap tiledMap) {
this.tiledMap = tiledMap;
for (MapLayer layer : tiledMap.getLayers()) {
TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer;
createActorsForLayer(tiledLayer);
}
}
private void createActorsForLayer(TiledMapTileLayer tiledLayer) {
for (int x = 0; x <= tiledLayer.getWidth(); x++) {
for (int y = 0; y < tiledLayer.getHeight(); y++) {
TiledMapTileLayer.Cell cell = tiledLayer.getCell(x, y);
TiledMapActor actor = new TiledMapActor(tiledMap, tiledLayer, cell);
actor.setBounds(x * tiledLayer.getTileWidth(), y * tiledLayer.getTileHeight(), tiledLayer.getTileWidth(),
tiledLayer.getTileHeight());
addActor(actor);
EventListener eventListener = new TiledMapClickListener(actor);
actor.addListener(eventListener);
}
}
}
}
public void resize(float width, float height) {
}
public class MyGestureListener implements GestureListener{
@Override
public boolean touchDown(float x, float y, int pointer, int button) {
return false;
}
@Override
public boolean tap(float x, float y, int count, int button) {
return false;
}
@Override
public boolean longPress(float x, float y) {
return false;
}
@Override
public boolean fling(float velocityX, float velocityY, int button) {
return false;
}
@Override
public boolean pan(float x, float y, float deltaX, float deltaY) {
float effectiveViewportWidth = camera.viewportWidth * camera.zoom;
float effectiveViewportHeight = camera.viewportHeight * camera.zoom;
camera.position.x = MathUtils.clamp(camera.position.x, effectiveViewportWidth / 2f, 33 - effectiveViewportWidth / 2f);
camera.position.y = MathUtils.clamp(camera.position.y, effectiveViewportHeight / 2f, 21 - effectiveViewportHeight / 2f);
if (camera.zoom < 1) {
camera.translate(-deltaX * PAN_RATE, -deltaY * PAN_RATE, 0);
camera.update();
}
return false;
}
@Override
public boolean panStop(float x, float y, int pointer, int button) {
//Gdx.app.log("Text", "panstop");
return false;
}
@Override
public boolean zoom (float originalDistance, float currentDistance){
float ratio = originalDistance/currentDistance;
camera.zoom += ZOOM_SPEED * ratio;
if (camera.zoom < 0.3)
{
camera.zoom = (float) 0.3;
}
else if (camera.zoom > 1)
{
camera.zoom = 1;
}
System.out.println(camera.zoom);
return false;
}
@Override
public boolean pinch (Vector2 initialFirstPointer, Vector2 initialSecondPointer, Vector2 firstPointer, Vector2 secondPointer){
camera.zoom -= .01;
camera.update();
return false;
}
}
}
因此,您想將屏幕坐標轉換為世界坐標。
例如:
@Override
public void clicked(InputEvent event, float x, float y) {
Vector3 touch = new Vector3(x, y, 0);
camera.unproject(touch);
System.out.println("Screen coordinates translated to world coordinates: "
+ "X: " + touch.x + " Y: " + touch.y);
}
}
上面單擊的功能不適用於我,但是您使我找到了答案。 我將整個分配角色丟棄為圖塊,並在touchDown的MyGestureListener中使用了camera.unproject。
如果有人感興趣,我就把它留在這里:)
@Override
public boolean touchDown(float x, float y, int pointer, int button) {
Vector3 temp_coord = new Vector3(x,y,0);
Vector3 coords = camera.unproject(temp_coord);
x =(int) coords.x;
y =(int) coords.y;
writerX = x;
writerY = y;
System.out.println("Screen coordinates translated to world coordinates: "
+ "X: " + x + " Y: " + y);
return false;
}
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