com.tp.libgdxdemo.util.IntFirstPersonCameraController.java Source code

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Here is the source code for com.tp.libgdxdemo.util.IntFirstPersonCameraController.java

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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.tp.libgdxdemo.util;

import com.badlogic.gdx.Application.ApplicationType;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.graphics.Camera;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.utils.IntIntMap;

import java.awt.im.InputContext;

/**
 * Takes a {@link Camera} instance and controls it via w,a,s,d and mouse panning.
 * Slightly modified from the original one to understand Azerty keyboards (if locale is fr_FR or
 * fr_BE) and handle shift/ctrl to "run"
 * 
 * @author badlogic
 */
public class IntFirstPersonCameraController extends InputAdapter {
    private final Camera camera;
    private final IntIntMap keys = new IntIntMap();
    private final int STRAFE_LEFT = isAzertyKeyboard() ? Keys.Q : Keys.A;
    private final int STRAFE_RIGHT = Keys.D;
    private final int FORWARD = isAzertyKeyboard() ? Keys.Z : Keys.W;
    private final int BACKWARD = Keys.S;
    private final int UP = isAzertyKeyboard() ? Keys.A : Keys.Q;
    private final int DOWN = Keys.E;
    private float velocity = 5;
    private float degreesPerPixel = 0.5f;
    private final Vector3 tmp = new Vector3();

    /**
     * Try to guess if Azerty keyboard by using locale, defaults to qwerty in case of error.
     * 
     * @return true is keyboard should be azerty
     */
    public static boolean isAzertyKeyboard() {
        if (Gdx.app.getType() != ApplicationType.Desktop) {
            return false;
        }
        try {
            final InputContext context = InputContext.getInstance();

            final String inputLocale = context.getLocale().toString();
            if (inputLocale != null
                    && (inputLocale.equalsIgnoreCase("fr_FR") || inputLocale.equalsIgnoreCase("fr_BE"))) {
                return true;
            }
        } catch (final Exception e) {
            e.printStackTrace();
        }
        return false;

    }

    public IntFirstPersonCameraController(final Camera camera) {
        this.camera = camera;
    }

    @Override
    public boolean keyDown(final int keycode) {
        keys.put(keycode, keycode);
        return true;
    }

    @Override
    public boolean keyUp(final int keycode) {
        keys.remove(keycode, 0);
        return true;
    }

    /**
     * Sets the velocity in units per second for moving forward, backward and strafing left/right.
     * 
     * @param velocity
     *            the velocity in units per second
     */
    public void setVelocity(final float velocity) {
        this.velocity = velocity;
    }

    /**
     * Sets how many degrees to rotate per pixel the mouse moved.
     * 
     * @param degreesPerPixel
     */
    public void setDegreesPerPixel(final float degreesPerPixel) {
        this.degreesPerPixel = degreesPerPixel;
    }

    @Override
    public boolean touchDragged(final int screenX, final int screenY, final int pointer) {
        final float deltaX = -Gdx.input.getDeltaX() * degreesPerPixel;
        final float deltaY = -Gdx.input.getDeltaY() * degreesPerPixel;
        camera.direction.rotate(camera.up, deltaX);
        tmp.set(camera.direction).crs(camera.up).nor();
        camera.direction.rotate(tmp, deltaY);
        // camera.up.rotate(tmp, deltaY);
        return true;
    }

    public void update() {
        update(Gdx.graphics.getDeltaTime());
    }

    public void update(final float deltaTime) {
        final boolean run = Gdx.input.isKeyPressed(Keys.SHIFT_LEFT) || Gdx.input.isKeyPressed(Keys.CONTROL_LEFT);
        if (keys.containsKey(FORWARD)) {
            tmp.set(camera.direction).nor().scl(deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        if (keys.containsKey(BACKWARD)) {
            tmp.set(camera.direction).nor().scl(-deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        if (keys.containsKey(STRAFE_LEFT)) {
            tmp.set(camera.direction).crs(camera.up).nor().scl(-deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        if (keys.containsKey(STRAFE_RIGHT)) {
            tmp.set(camera.direction).crs(camera.up).nor().scl(deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        if (keys.containsKey(UP)) {
            tmp.set(camera.up).nor().scl(deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        if (keys.containsKey(DOWN)) {
            tmp.set(camera.up).nor().scl(-deltaTime * velocity * (run ? 2 : 1));
            camera.position.add(tmp);
        }
        camera.update(true);
    }

}