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annotate Orchestland/Assets/OVR/Scripts/Util/OVRScreenFade.cs @ 3:0030a1b971fb default tip

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author Yuta ANSE <e135745@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:23:43 +0900
parents f7675884f2a1
children
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1
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1 /************************************************************************************
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2
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3 Copyright : Copyright 2014 Oculus VR, LLC. All Rights reserved.
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4
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5 Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
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6 you may not use the Oculus VR Rift SDK except in compliance with the License,
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7 which is provided at the time of installation or download, or which
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8 otherwise accompanies this software in either electronic or hard copy form.
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9
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10 You may obtain a copy of the License at
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11
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12 http://www.oculusvr.com/licenses/LICENSE-3.2
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13
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14 Unless required by applicable law or agreed to in writing, the Oculus VR SDK
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15 distributed under the License is distributed on an "AS IS" BASIS,
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16 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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17 See the License for the specific language governing permissions and
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18 limitations under the License.
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19
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20 ************************************************************************************/
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21
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22 using UnityEngine;
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23 using System.Collections; // required for Coroutines
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24
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25 /// <summary>
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26 /// Fades the screen from black after a new scene is loaded.
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27 /// </summary>
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28 public class OVRScreenFade : MonoBehaviour
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29 {
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30 /// <summary>
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31 /// How long it takes to fade.
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32 /// </summary>
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33 public float fadeTime = 2.0f;
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34
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35 /// <summary>
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36 /// The initial screen color.
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37 /// </summary>
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38 public Color fadeColor = new Color(0.01f, 0.01f, 0.01f, 1.0f);
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39
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40 /// <summary>
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41 /// The shader to use when rendering the fade.
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42 /// </summary>
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43 public Shader fadeShader = null;
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44
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45 private Material fadeMaterial = null;
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46 private bool isFading = false;
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47
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48 /// <summary>
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49 /// Initialize.
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50 /// </summary>
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51 void Awake()
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52 {
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53 // create the fade material
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54 fadeMaterial = (fadeShader != null) ? new Material(fadeShader) : new Material(Shader.Find("Transparent/Diffuse"));
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55 }
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56
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57 /// <summary>
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58 /// Starts the fade in
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59 /// </summary>
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60 void OnEnable()
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61 {
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62 StartCoroutine(FadeIn());
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63 }
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64
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65 /// <summary>
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66 /// Starts a fade in when a new level is loaded
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67 /// </summary>
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68 void OnLevelWasLoaded(int level)
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69 {
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70 StartCoroutine(FadeIn());
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71 }
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72
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73 /// <summary>
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74 /// Cleans up the fade material
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75 /// </summary>
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76 void OnDestroy()
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77 {
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78 if (fadeMaterial != null)
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79 {
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80 Destroy(fadeMaterial);
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81 }
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82 }
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83
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84 /// <summary>
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85 /// Fades alpha from 1.0 to 0.0
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86 /// </summary>
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87 IEnumerator FadeIn()
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88 {
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89 float elapsedTime = 0.0f;
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90 Color color = fadeMaterial.color = fadeColor;
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91 isFading = true;
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92 while (elapsedTime < fadeTime)
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93 {
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94 yield return new WaitForEndOfFrame();
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95 elapsedTime += Time.deltaTime;
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96 color.a = 1.0f - Mathf.Clamp01(elapsedTime / fadeTime);
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97 fadeMaterial.color = color;
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98 }
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99 isFading = false;
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100 }
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101
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102 /// <summary>
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103 /// Renders the fade overlay when attached to a camera object
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104 /// </summary>
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105 void OnPostRender()
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106 {
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107 if (isFading)
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108 {
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109 fadeMaterial.SetPass(0);
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110 GL.PushMatrix();
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111 GL.LoadOrtho();
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112 GL.Color(fadeMaterial.color);
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113 GL.Begin(GL.QUADS);
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114 GL.Vertex3(0f, 0f, -12f);
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115 GL.Vertex3(0f, 1f, -12f);
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116 GL.Vertex3(1f, 1f, -12f);
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117 GL.Vertex3(1f, 0f, -12f);
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118 GL.End();
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119 GL.PopMatrix();
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120 }
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121 }
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122 }