1 /******************************************************************************* 2 * Copyright 2011 See AUTHORS file. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 ******************************************************************************/ 16 17 package com.badlogic.gdx.utils.viewport; 18 19 import com.badlogic.gdx.graphics.Camera; 20 import com.badlogic.gdx.graphics.OrthographicCamera; 21 22 /** 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 23 * can be {@link #setUnitsPerPixel(float) changed}. 24 * @author Daniel Holderbaum 25 * @author Nathan Sweet */ 26 public class ScreenViewport extends Viewport { 27 private float unitsPerPixel = 1; 28 29 /** Creates a new viewport using a new {@link OrthographicCamera}. */ 30 public ScreenViewport () { 31 this(new OrthographicCamera()); 32 } 33 34 public ScreenViewport (Camera camera) { 35 setCamera(camera); 36 } 37 38 @Override 39 public void update (int screenWidth, int screenHeight, boolean centerCamera) { 40 setScreenBounds(0, 0, screenWidth, screenHeight); 41 setWorldSize(screenWidth * unitsPerPixel, screenHeight * unitsPerPixel); 42 apply(centerCamera); 43 } 44 45 public float getUnitsPerPixel () { 46 return unitsPerPixel; 47 } 48 49 /** 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. 50 * Default is 1. */ 51 public void setUnitsPerPixel (float unitsPerPixel) { 52 this.unitsPerPixel = unitsPerPixel; 53 } 54 } 55
