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| package com.bertho.weedFarmer.utils;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.input.GestureDetector.GestureAdapter;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;
public class CameraGestureController extends GestureAdapter {
final private float MINIMUM_FLING_VELOCITY = 200;
private OrthographicCamera camera;
private TiledMap map;
final public float TOP, BOTTOM, LEFT, RIGHT;
private int mapPixelWidth, mapPixelHeight;
private float origDistance, baseDistance, origZoom;
private Vector2 pinchInitialPointer1 = new Vector2(0,0), pinchInitialPointer2 = new Vector2(0,0);
private Vector3 pinchPosition = new Vector3(0,0,0), pinchLastPosition = new Vector3(0,0,0);
private Vector3 pinchLastMapPosition = new Vector3(0,0,0), pinchMapPositionBeforeZoom = new Vector3(0,0,0);
private boolean flingable = true;
private float velX = 0, velY = 0;
public CameraGestureController (OrthographicCamera camera, TiledMap map) {
this.camera = camera;
this.map = map;
mapPixelWidth = map.getProperties().get("width", Integer.class) * map.getProperties().get("tilewidth", Integer.class);
mapPixelHeight = map.getProperties().get("height", Integer.class) * map.getProperties().get("tileheight", Integer.class);
LEFT = 0;
RIGHT = mapPixelWidth;
TOP = mapPixelHeight/2 + map.getProperties().get("tileheight", Integer.class)/2;
BOTTOM = -(mapPixelHeight/2 - map.getProperties().get("tileheight", Integer.class)/2);
}
@Override
public boolean longPress (float x, float y) {
Gdx.app.log("GestureDetectorTest", "long press at " + x + ", " + y);
return false;
}
@Override
public boolean fling (float velocityX, float velocityY, int button) {
if(Math.abs(velocityX) > MINIMUM_FLING_VELOCITY || Math.abs(velocityY) > MINIMUM_FLING_VELOCITY) {
velX = camera.zoom * velocityX;
velY = camera.zoom * velocityY;
}
return false;
}
@Override
public boolean pan (float x, float y, float deltaX, float deltaY) {
moveCamera(true, camera.zoom * -deltaX, camera.zoom * deltaY);
return false;
}
@Override
public boolean panStop (float x, float y, int pointer, int button) {
return false;
}
@Override
public boolean zoom (float originalDistance, float currentDistance) {
flingable = false;
if(origDistance != originalDistance){
origDistance = originalDistance;
baseDistance = originalDistance;
origZoom = camera.zoom;
}
if (pinchLastPosition.x != 0 && pinchLastPosition.y != 0) {
//Gdx.app.log("GestureDetectorTest", "Pinch test x=" + (pinchLastPosition.x - pinchPosition.x) + ", y=" + (pinchLastPosition.y - pinchPosition.y));
moveCamera(true, (pinchLastPosition.x - pinchPosition.x)*camera.zoom, -(pinchLastPosition.y - pinchPosition.y)*camera.zoom);
}
float ratio = baseDistance/currentDistance;
float newZoom = origZoom*ratio;
if (newZoom >= 1) {
camera.zoom = 1;
origZoom = 1;
baseDistance = currentDistance;
} else if (newZoom <= 0.5) {
camera.zoom = (float) 0.5;
origZoom = (float) 0.5;
baseDistance = currentDistance;
} else {
camera.zoom = newZoom;
}
camera.update();
Vector3 pinchMapPosition = camera.unproject(new Vector3(pinchPosition.x, pinchPosition.y, 0));
Gdx.app.log("GestureDetectorTest", "Actual position x=" + pinchMapPosition.x + ", y=" + pinchMapPosition.y + " to x=" + pinchPosition.x + ", y=" + pinchPosition.y);
Gdx.app.log("GestureDetectorTest", "-----------------");
return false;
}
@Override
public boolean pinch (Vector2 initialFirstPointer, Vector2 initialSecondPointer, Vector2 firstPointer, Vector2 secondPointer) {
if (pinchPosition.x != 0 && pinchPosition.y != 0) {
pinchLastPosition = new Vector3(pinchPosition.x, pinchPosition.y, 0);
pinchLastMapPosition = camera.unproject(new Vector3(pinchPosition.x, pinchPosition.y, 0));
}
if (!pinchInitialPointer1.equals(initialFirstPointer) || !pinchInitialPointer2.equals(initialSecondPointer)) {
pinchInitialPointer1 = initialFirstPointer.cpy();
pinchInitialPointer2 = initialSecondPointer.cpy();
pinchLastPosition.set(0,0,0);
pinchLastMapPosition.set(0,0,0);
}
pinchPosition = new Vector3((firstPointer.x+secondPointer.x)/2, (firstPointer.y+secondPointer.y)/2, 0);
pinchMapPositionBeforeZoom = camera.unproject(new Vector3(pinchPosition.x, pinchPosition.y, 0));
Gdx.app.log("GestureDetectorTest", "BeforeZoom x=" + pinchMapPositionBeforeZoom.x + ", y=" + pinchMapPositionBeforeZoom.y + " to x=" + pinchPosition.x + ", y=" + pinchPosition.y);
return false;
}
@Override
public boolean touchDown (float x, float y, int pointer, int button) {
return false;
}
public void update () {
if (velX != 0 && velY != 0) {
if (flingable && !Gdx.input.justTouched()) {
velX *= 0.94f;
velY *= 0.94f;
moveCamera(true, -velX * Gdx.graphics.getDeltaTime(), velY * Gdx.graphics.getDeltaTime());
if (Math.abs(velX) < MINIMUM_FLING_VELOCITY && Math.abs(velY) < MINIMUM_FLING_VELOCITY) {
velX = 0;
velY = 0;
}
} else {
flingable = true;
velX = 0;
velY = 0;
}
}
}
public void moveCamera (boolean add, float x, float y)
{
float newX, newY;
if (add)
{
newX = camera.position.x + x;
newY = camera.position.y + y;
} else
{
newX = x;
newY = y;
}
if (newX - camera.viewportWidth/2*camera.zoom < LEFT)
newX = LEFT + camera.viewportWidth/2*camera.zoom;
if (newX + camera.viewportWidth/2*camera.zoom > RIGHT)
newX = RIGHT - camera.viewportWidth/2*camera.zoom;
if (newY + camera.viewportHeight/2*camera.zoom > TOP)
newY = TOP - camera.viewportHeight/2*camera.zoom;
if (newY - camera.viewportHeight/2*camera.zoom < BOTTOM)
newY = BOTTOM + camera.viewportHeight/2*camera.zoom;
camera.position.x = newX;
camera.position.y = newY;
}
} |
