io.lonelyrobot.empires.client.input.HexMapCameraController.java Source code

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Here is the source code for io.lonelyrobot.empires.client.input.HexMapCameraController.java

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/* #########################################################################
 * Copyright (c) 2013 Random Robot Softworks
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 ######################################################################### */

package io.lonelyrobot.empires.client.input;

import org.apache.log4j.Logger;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.math.MathUtils;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.math.Vector3;

import io.lonelyrobot.empires.client.maps.hex.R2HexMapRenderer;
import io.lonelyrobot.empires.client.resources.Values;
import io.lonelyrobot.empires.client.screens.gameplay.HexMapScreen;
import io.lonelyrobot.empires.framework.map.SolarSystem;

public class HexMapCameraController extends InputAdapter {
    private Logger logger = Logger.getLogger(getClass().getSimpleName());

    private final OrthographicCamera camera;
    private final Vector2 zoomLimits = new Vector2(0.65f, 1.45f);
    private final Vector3 curr = new Vector3();
    private final Vector3 last = new Vector3(-1, -1, -1);
    private final Vector3 delta = new Vector3();

    float sclx = (float) Gdx.graphics.getWidth() / Values.HEX_MAP_BASE_SIZE.x;
    float scly = (float) Gdx.graphics.getHeight() / Values.HEX_MAP_BASE_SIZE.y;

    private R2HexMapRenderer renderer;
    private HexMapScreen parent;

    public HexMapCameraController(HexMapScreen parent, OrthographicCamera camera, R2HexMapRenderer renderer) {
        this.camera = camera;
        this.camera.zoom = 1f;
        this.renderer = renderer;
        this.parent = parent;
    }

    public HexMapCameraController(int[] params) {
        camera = new OrthographicCamera();
    }

    @Override
    public boolean mouseMoved(int screenX, int screenY) {
        Vector3 tmp = new Vector3(screenX * sclx, screenY * scly, 0);
        camera.unproject(tmp);
        SolarSystem system = null;
        system = renderer.getTileWithPos(tmp.x, tmp.y);
        parent.updateHover(system);

        return false;
    }

    @Override
    public boolean touchDown(int screenX, int screenY, int pointer, int button) {
        Vector3 tmp = new Vector3(screenX * sclx, screenY * scly, 0);
        camera.unproject(tmp);
        SolarSystem system = null;

        try {
            system = renderer.getTileWithPos(tmp.x, tmp.y);
        } catch (Exception e) {
            logger.debug("Click range out of bounds of map range!");
        } finally {
            parent.updateWindow(system);
            renderer.updateFocus(system);
        }
        return true;
    }

    @Override
    public boolean touchDragged(int x, int y, int pointer) {
        curr.set(x, y, 0);
        if (!(last.x == -1 && last.y == -1 && last.z == -1)) {
            delta.set(last.x, last.y, 0);
            delta.sub(curr);
            delta.scl(camera.zoom);
            camera.position.add(delta.x, -delta.y, 0);
        }
        last.set(x, y, 0);
        return false;
    }

    public void changeZoom(float zoom, float x, float y) {

        Vector3 before = new Vector3(x, y, 0);
        camera.unproject(before);

        if (zoom <= zoomLimits.x || zoom >= zoomLimits.y) {
            return;
        }

        camera.zoom = zoom;
        camera.update();
        Vector3 after = new Vector3(x, y, 0);
        camera.unproject(after);

        camera.translate(before.x - after.x, before.y - after.y, 0);
    }

    @Override
    public boolean scrolled(int amount) {
        float newZoom = camera.zoom * (1 + (amount < 0 ? 0.1f : -0.1f));
        changeZoom(newZoom, last.x, last.y);
        return true;
    }

    @Override
    public boolean touchUp(int x, int y, int pointer, int button) {
        last.set(-1, -1, -1);
        return false;
    }

    public void update() {
        float halfWidth = Values.HEX_MAP_BASE_SIZE.x / 2 * camera.zoom;
        float halfHeight = Values.HEX_MAP_BASE_SIZE.y / 2 * camera.zoom;

        float x = ((renderer.getMap().getTileWidth() / 2) * renderer.getMap().getWidth())
                + ((renderer.getMap().getTileWidth() / 2) * renderer.getMap().getWidth() * 0.75f);
        float y = renderer.getMap().getTileHeight() * renderer.getMap().getHeight()
                + (renderer.getMap().getTileHeight() / 2);

        camera.position.x = MathUtils.clamp(camera.position.x, halfWidth, x - halfWidth);
        camera.position.y = MathUtils.clamp(camera.position.y, halfHeight, y - halfHeight);

        camera.update();
    }
}