com.badlogic.gdx.utils.viewport.ScreenViewport.java Source code

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Here is the source code for com.badlogic.gdx.utils.viewport.ScreenViewport.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.utils.viewport;

import com.badlogic.gdx.graphics.Camera;
import com.badlogic.gdx.graphics.OrthographicCamera;

/** A viewport where the world size is based on the size of the screen. By default 1 world unit == 1 screen pixel, but this ratio
 * can be {@link #setUnitsPerPixel(float) changed}.
 * @author Daniel Holderbaum
 * @author Nathan Sweet */
public class ScreenViewport extends Viewport {
    private float unitsPerPixel = 1;

    /** Creates a new viewport using a new {@link OrthographicCamera}. */
    public ScreenViewport() {
        this(new OrthographicCamera());
    }

    public ScreenViewport(Camera camera) {
        setCamera(camera);
    }

    @Override
    public void update(int screenWidth, int screenHeight, boolean centerCamera) {
        setScreenBounds(0, 0, screenWidth, screenHeight);
        setWorldSize(screenWidth * unitsPerPixel, screenHeight * unitsPerPixel);
        apply(centerCamera);
    }

    public float getUnitsPerPixel() {
        return unitsPerPixel;
    }

    /** Sets the number of pixels for each world unit. Eg, a scale of 2.5 means there are 2.5 world units for every 1 screen pixel.
     * Default is 1. */
    public void setUnitsPerPixel(float unitsPerPixel) {
        this.unitsPerPixel = unitsPerPixel;
    }
}