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.graphics; 18 19 import com.badlogic.gdx.math.Matrix4; 20 import com.badlogic.gdx.math.Vector3; 21 22 /** A Camera with perspective projection. 23 * 24 * @author mzechner */ 25 public class PerspectiveCamera extends Camera { 26 /** the field of view of the height, in degrees **/ 27 public float fieldOfView = 67; 28 29 public PerspectiveCamera () { 30 } 31 32 /** Constructs a new {@link PerspectiveCamera} with the given field of view and viewport size. The aspect ratio is derived from 33 * the viewport size. 34 * 35 * @param fieldOfViewY the field of view of the height, in degrees, the field of view for the width will be calculated 36 * according to the aspect ratio. 37 * @param viewportWidth the viewport width 38 * @param viewportHeight the viewport height */ 39 public PerspectiveCamera (float fieldOfViewY, float viewportWidth, float viewportHeight) { 40 this.fieldOfView = fieldOfViewY; 41 this.viewportWidth = viewportWidth; 42 this.viewportHeight = viewportHeight; 43 update(); 44 } 45 46 final Vector3 tmp = new Vector3(); 47 48 @Override 49 public void update () { 50 update(true); 51 } 52 53 @Override 54 public void update (boolean updateFrustum) { 55 float aspect = viewportWidth / viewportHeight; 56 projection.setToProjection(Math.abs(near), Math.abs(far), fieldOfView, aspect); 57 view.setToLookAt(position, tmp.set(position).add(direction), up); 58 combined.set(projection); 59 Matrix4.mul(combined.val, view.val); 60 61 if (updateFrustum) { 62 invProjectionView.set(combined); 63 Matrix4.inv(invProjectionView.val); 64 frustum.update(invProjectionView); 65 } 66 } 67 } 68
