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

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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
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24 /// <summary>
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25 /// OVRCrosshair is a component that adds a stereoscoppic cross-hair into a scene.
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26 /// </summary>
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27 public class OVRCrosshair
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28 {
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29 #region Variables
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30 public Texture ImageCrosshair = null;
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31
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32 public OVRCameraRig CameraController = null;
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33 public OVRPlayerController PlayerController = null;
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34
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35 public float FadeTime = 0.3f;
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36 public float FadeScale = 0.6f;
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37 public float CrosshairDistance = 1.0f;
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38
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39 public KeyCode CrosshairKey = KeyCode.C;
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40
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41 private float DeadZoneX = 400.0f;
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42 private float DeadZoneY = 75.0f;
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43
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44 private float ScaleSpeedX = 7.0f;
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45 private float ScaleSpeedY = 7.0f;
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46
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47 private bool DisplayCrosshair;
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48 private bool CollisionWithGeometry;
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49 private float FadeVal;
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50 private Transform UIAnchor;
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51
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52 private float XL = 0.0f;
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53 private float YL = 0.0f;
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54
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55 private float ScreenWidth = 1280.0f;
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56 private float ScreenHeight = 800.0f;
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57
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58 #endregion
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59
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60 #region Public Functions
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61
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62 /// <summary>
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63 /// Sets the crosshair texture.
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64 /// </summary>
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65 /// <param name="image">Image.</param>
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66 public void SetCrosshairTexture(ref Texture image)
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67 {
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68 ImageCrosshair = image;
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69 }
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70
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71 /// <summary>
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72 /// Sets the OVR camera controller.
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73 /// </summary>
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74 /// <param name="cameraController">Camera controller.</param>
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75 public void SetOVRCameraController(ref OVRCameraRig cameraController)
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76 {
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77 CameraController = cameraController;
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78 UIAnchor = CameraController.centerEyeAnchor;
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79 }
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80
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81 /// <summary>
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82 /// Sets the OVR player controller.
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83 /// </summary>
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84 /// <param name="playerController">Player controller.</param>
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85 public void SetOVRPlayerController(ref OVRPlayerController playerController)
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86 {
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87 PlayerController = playerController;
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88 }
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89
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90 /// <summary>
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91 /// Determines whether the crosshair is visible.
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92 /// </summary>
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93 /// <returns><c>true</c> if this instance is crosshair visible; otherwise, <c>false</c>.</returns>
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94 public bool IsCrosshairVisible()
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95 {
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96 if(FadeVal > 0.0f)
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97 return true;
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98
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99 return false;
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100 }
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101
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102 /// <summary>
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103 /// Init this instance.
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104 /// </summary>
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105 public void Init()
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106 {
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107 DisplayCrosshair = false;
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108 CollisionWithGeometry = false;
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109 FadeVal = 0.0f;
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110
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111 ScreenWidth = Screen.width;
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112 ScreenHeight = Screen.height;
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113
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114 // Initialize screen location of cursor
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115 XL = ScreenWidth * 0.5f;
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116 YL = ScreenHeight * 0.5f;
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117 }
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118
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119 /// <summary>
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120 /// Updates the crosshair.
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121 /// </summary>
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122 public void UpdateCrosshair()
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123 {
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124 if (ShouldDisplayCrosshair())
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125 {
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126 // Do not do these tests within OnGUI since they will be called twice
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127 CollisionWithGeometryCheck();
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128 }
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129 }
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130
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131 /// <summary>
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132 /// The GUI crosshair event.
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133 /// </summary>
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134 public void OnGUICrosshair()
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135 {
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136 if ((DisplayCrosshair == true) && (CollisionWithGeometry == false))
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137 FadeVal += Time.deltaTime / FadeTime;
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138 else
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139 FadeVal -= Time.deltaTime / FadeTime;
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140
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141 FadeVal = Mathf.Clamp(FadeVal, 0.0f, 1.0f);
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142
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143 // Check to see if crosshair influences mouse rotation
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144 if(PlayerController != null)
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145 PlayerController.SetSkipMouseRotation(false);
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146
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147 if ((ImageCrosshair != null) && (FadeVal != 0.0f))
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148 {
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149 // Assume cursor is on-screen (unless it goes into the dead-zone)
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150 // Other systems will check this to see if it is false for example
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151 // allowing rotation to take place
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152 if(PlayerController != null)
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153 PlayerController.SetSkipMouseRotation(true);
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154
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155 GUI.color = new Color(1, 1, 1, FadeVal * FadeScale);
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156
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157 // Calculate X
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158 XL += Input.GetAxis("Mouse X") * ScaleSpeedX;
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159 if(XL < DeadZoneX)
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160 {
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161 if(PlayerController != null)
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162 PlayerController.SetSkipMouseRotation(false);
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163
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164 XL = DeadZoneX - 0.001f;
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165 }
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166 else if (XL > (Screen.width - DeadZoneX))
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167 {
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168 if(PlayerController != null)
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169 PlayerController.SetSkipMouseRotation(false);
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170
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171 XL = ScreenWidth - DeadZoneX + 0.001f;
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172 }
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173
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174 // Calculate Y
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175 YL -= Input.GetAxis("Mouse Y") * ScaleSpeedY;
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176 if(YL < DeadZoneY)
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177 {
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178 //CursorOnScreen = false;
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179 if(YL < 0.0f) YL = 0.0f;
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180 }
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181 else if (YL > ScreenHeight - DeadZoneY)
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182 {
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183 //CursorOnScreen = false;
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184 if(YL > ScreenHeight) YL = ScreenHeight;
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185 }
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186
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187 // Finally draw cursor
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188 bool skipMouseRotation = true;
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189 if(PlayerController != null)
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190 PlayerController.GetSkipMouseRotation(ref skipMouseRotation);
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191
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192 if(skipMouseRotation == true)
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193 {
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194 // Left
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195 GUI.DrawTexture(new Rect( XL - (ImageCrosshair.width * 0.5f),
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196 YL - (ImageCrosshair.height * 0.5f),
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197 ImageCrosshair.width,
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198 ImageCrosshair.height),
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199 ImageCrosshair);
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200 }
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201
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202 GUI.color = Color.white;
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203 }
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204 }
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205 #endregion
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206
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207 #region Private Functions
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208 /// <summary>
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209 /// Shoulds the crosshair be displayed.
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210 /// </summary>
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211 /// <returns><c>true</c>, if display crosshair was shoulded, <c>false</c> otherwise.</returns>
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212 bool ShouldDisplayCrosshair()
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213 {
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214 if(Input.GetKeyDown (CrosshairKey))
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215 {
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216 if(DisplayCrosshair == false)
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217 {
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218 DisplayCrosshair = true;
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219
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220 // Always initialize screen location of cursor to center
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221 XL = ScreenWidth * 0.5f;
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222 YL = ScreenHeight * 0.5f;
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223 }
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224 else
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225 DisplayCrosshair = false;
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226 }
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227
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228 return DisplayCrosshair;
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229 }
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230
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231 /// <summary>
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232 /// Do a collision raycast on geometry for crosshair.
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233 /// </summary>
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234 /// <returns><c>true</c>, if with geometry check was collisioned, <c>false</c> otherwise.</returns>
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235 bool CollisionWithGeometryCheck()
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236 {
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237 CollisionWithGeometry = false;
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238
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239 Vector3 startPos = UIAnchor.position;
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240 Vector3 dir = Vector3.forward;
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241 dir = UIAnchor.rotation * dir;
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242 dir *= CrosshairDistance;
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243 Vector3 endPos = startPos + dir;
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244
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245 RaycastHit hit;
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246 if (Physics.Linecast(startPos, endPos, out hit))
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247 {
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248 if (!hit.collider.isTrigger)
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249 {
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250 CollisionWithGeometry = true;
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251 }
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252 }
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253
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254 return CollisionWithGeometry;
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255 }
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256 #endregion
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257 }