annotate Orchestland/Assets/OVR/Scripts/Util/OVRVisionGuide.cs @ 1:f7675884f2a1

Add Orchestland project
author Daiki OYAKAWA <e135764@ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2015 23:09:20 +0900
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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;
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24
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25 /// <summary>
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26 /// OVR vision guide.
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27 /// </summary>
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28 public class OVRVisionGuide : MonoBehaviour
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29 {
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30 // Manual fade (used when out of view; will add textures on top)
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31 private Texture FadeTexture = null;
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32 private float FadeTextureAlpha = 0.0f;
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33
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34 // Clip Camera (takes position offset into account)
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35 private Vector3 CameraPositionClampMin = new Vector3(-0.45f, -0.25f, -0.5f);
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36 private Vector3 CameraPositionClampMax = new Vector3( 0.45f, 1.35f, 1.0f);
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37 private float CameraPositionOverlap = 0.125f;
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38 private float CameraPositionMaxFade = 0.65f;
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39
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40 // Handle to OVRCameraRig
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41 private OVRCameraRig CameraController = null;
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42
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43 // Handle to Vision Guide
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44 private GameObject VisionGuide = null;
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45 private float VisionGuideFlashSpeed = 5.0f; // Radians / sec
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46
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47 // Layer to render to
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48 private string LayerName = "Default";
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49
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50 /// <summary>
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51 /// Start this instance.
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52 /// </summary>
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53 void Start ()
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54 {
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55 if(CameraController != null)
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56 {
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57 // Set the GUI target
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58 VisionGuide = GameObject.Instantiate(Resources.Load("OVRVisionGuideMessage")) as GameObject;
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59 // Grab transform of GUI object
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60 Transform t = VisionGuide.transform;
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61 // Attach the GUI object to the camera
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62 VisionGuide.transform.parent = CameraController.centerEyeAnchor;
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63 // Reset the transform values
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64 VisionGuide.transform.localPosition = t.position;
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65 VisionGuide.transform.localRotation = t.rotation;
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66 VisionGuide.transform.localScale = t.localScale;
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67 // Deactivate the object
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68 VisionGuide.SetActive(false);
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69 // Set layer on object
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70 VisionGuide.layer = LayerMask.NameToLayer(LayerName);
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71 }
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72 }
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73
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74 /// <summary>
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75 /// Update this instance.
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76 /// </summary>
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77 void Update()
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78 {
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79 Vector3 relVisionCam = Vector3.zero;
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80 // Fade screen out based on location of relative Vision Camera
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81 UpdateFadeValueFromRelCamPosition(ref relVisionCam);
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82
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83 if (Input.GetKeyDown(KeyCode.T))
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84 OVRManager.instance.timeWarp = !OVRManager.instance.timeWarp;
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85
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86 if (Input.GetKeyDown(KeyCode.F))
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87 OVRManager.instance.freezeTimeWarp = !OVRManager.instance.freezeTimeWarp;
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88 }
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89
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90 /// <summary>
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91 /// Updates the fade value from rel cam position.
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92 /// </summary>
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93 /// <returns><c>true</c>, if fade value from rel cam position was updated, <c>false</c> otherwise.</returns>
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94 /// <param name="relCamPosition">Rel cam position.</param>
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95 bool UpdateFadeValueFromRelCamPosition(ref Vector3 relCamPosition)
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96 {
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97 bool result = false;
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98 FadeTextureAlpha = 0.0f;
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99
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100 // Clip camera to min amd max values
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101 // MIN
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102 if((relCamPosition.x < CameraPositionClampMin.x) &&
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103 (CalculateFadeValue(ref FadeTextureAlpha,
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104 relCamPosition.x, CameraPositionClampMin.x) == true))
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105 result = true;
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106
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107 if((relCamPosition.y < CameraPositionClampMin.y) &&
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108 (CalculateFadeValue(ref FadeTextureAlpha,
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109 relCamPosition.y, CameraPositionClampMin.y) == true))
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110 result = true;
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111
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112 if((relCamPosition.z < CameraPositionClampMin.z) &&
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113 (CalculateFadeValue(ref FadeTextureAlpha,
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114 relCamPosition.z, CameraPositionClampMin.z) == true))
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115 result = true;
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116
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117 // MAX
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118 if((relCamPosition.x > CameraPositionClampMax.x) &&
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119 (CalculateFadeValue(ref FadeTextureAlpha,
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120 CameraPositionClampMax.x, relCamPosition.x ) == true))
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121 result = true;
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122
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123 if((relCamPosition.y > CameraPositionClampMax.y) &&
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124 (CalculateFadeValue(ref FadeTextureAlpha,
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125 CameraPositionClampMax.y, relCamPosition.y ) == true))
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126 result = true;
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127
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128 if((relCamPosition.z > CameraPositionClampMax.z) &&
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129 (CalculateFadeValue(ref FadeTextureAlpha,
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130 CameraPositionClampMax.z, relCamPosition.z ) == true))
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131 result = true;
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132
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133 return result;
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134 }
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135
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136 /// <summary>
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137 /// CalculateFadeValue
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138 /// return value tells us which axis is the furthest out, so we
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139 /// can tell the user which direction to go
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140 /// </summary>
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141 /// <returns><c>true</c>, if fade value was calculated, <c>false</c> otherwise.</returns>
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142 /// <param name="curFade">Current fade.</param>
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143 /// <param name="a">The alpha component.</param>
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144 /// <param name="b">The blue component.</param>
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145 bool CalculateFadeValue(ref float curFade, float a, float b)
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146 {
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147 bool result = false;
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148
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149 float tmpFade = (b - a) / CameraPositionOverlap;
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150
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151 if(tmpFade > 1.0f) tmpFade = 1.0f;
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152 tmpFade *= CameraPositionMaxFade;
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153
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154 if(tmpFade > curFade)
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155 {
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156 curFade = tmpFade;
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157
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158 // We want to show a bit more then the fade
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159 if(tmpFade >= CameraPositionMaxFade)
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160 result = true;
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161 }
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162
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163 return result;
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164 }
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165
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166
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167 //
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168 // PUBLIC FUNCTIONS
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169 //
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170
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171 /// <summary>
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172 /// Sets the camera controller.
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173 /// </summary>
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174 /// <param name="cameraController">Camera controller.</param>
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175 public void SetOVRCameraController(ref OVRCameraRig cameraController)
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176 {
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177 CameraController = cameraController;
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178 }
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179
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180 /// <summary>
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181 /// Sets the fade texture.
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182 /// </summary>
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183 /// <param name="fadeTexture">Fade texture.</param>
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184 public void SetFadeTexture(ref Texture fadeTexture)
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185 {
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186 FadeTexture = fadeTexture;
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187 }
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188
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189 /// <summary>
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190 /// Gets the fade alpha value.
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191 /// </summary>
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192 /// <returns>The fade alpha value.</returns>
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193 public float GetFadeAlphaValue()
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194 {
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195 return FadeTextureAlpha;
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196 }
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197
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198 /// <summary>
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199 /// Sets the vision guide layer.
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200 /// </summary>
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201 /// <param name="layer">Layer.</param>
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202 public void SetVisionGuideLayer(ref string layer)
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203 {
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204 LayerName = layer;
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205 }
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206
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207 /// <summary>
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208 /// Raises the GUI vision guide event.
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209 /// </summary>
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210 public void OnGUIVisionGuide()
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211 {
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212 // Separate fade value (externally driven)
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213 if((FadeTexture != null) && (FadeTextureAlpha > 0.0f))
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214 {
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215 GUI.color = new Color(0.1f, 0.1f, 0.1f, FadeTextureAlpha);
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216 GUI.DrawTexture( new Rect(0, 0, Screen.width, Screen.height ), FadeTexture );
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217 GUI.color = Color.white;
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218
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219 if(VisionGuide != null)
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220 {
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221 // Activate the message
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222 VisionGuide.SetActive(true);
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223
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224 // Sharper curve for fading text
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225 float fade = FadeTextureAlpha / CameraPositionMaxFade;
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226 fade *= fade;
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227
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228 // Fade and flash the VisionGuide message
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229 float VisionGuideAlpha =
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230 fade * ((Mathf.Sin(Time.time * VisionGuideFlashSpeed) + 1.0f) * 0.5f);
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231
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232 Material m = VisionGuide.GetComponent<Renderer>().material;
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233 Color c = m.GetColor("_Color");
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234 c.a = VisionGuideAlpha;
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235 m.SetColor("_Color", c);
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236 }
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237 }
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238 else
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239 {
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240 if(VisionGuide != null)
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241 VisionGuide.SetActive(false);
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242 }
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243 }
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244 }