com.badlogic.gdx.graphics.g3d.test.utils.PerspectiveCamController.java Source code

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Here is the source code for com.badlogic.gdx.graphics.g3d.test.utils.PerspectiveCamController.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.badlogic.gdx.graphics.g3d.test.utils;

import com.badlogic.gdx.InputAdapter;
import com.badlogic.gdx.graphics.PerspectiveCamera;
import com.badlogic.gdx.math.Intersector;
import com.badlogic.gdx.math.Plane;
import com.badlogic.gdx.math.Vector3;
import com.badlogic.gdx.math.collision.Ray;

public class PerspectiveCamController extends InputAdapter {
    final PerspectiveCamera camera;
    final Vector3 curr = new Vector3();
    final Vector3 last = new Vector3(-1, -1, -1);
    final Vector3 delta = new Vector3();
    final Plane plane = new Plane(new Vector3(0, 0, 1), 0);

    public PerspectiveCamController(PerspectiveCamera camera) {
        this.camera = camera;
    }

    @Override
    public boolean touchDragged(int x, int y, int pointer) {
        Ray ray = camera.getPickRay(x, y);
        Intersector.intersectRayPlane(ray, plane, curr);

        if (!(last.x == -1 && last.y == -1 && last.z == -1)) {
            ray = camera.getPickRay(last.x, last.y);
            Intersector.intersectRayPlane(ray, plane, delta);
            delta.sub(curr);
            camera.position.add(delta.x, delta.y, delta.z);
        }
        last.set(x, y, 0);
        return false;
    }

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