Qualcomm_Snapdragon_VR_SDK SvrManager脚本简介(5)

在SvrManager初始化的方法中依次调用了InitializeCameras()、InitializeEyes()以及InitializeOverlays( )方法。
其中InitializeCameras的实现如下：
private void InitializeCameras()
{
Vector3 eyePos; // left
eyePos.x = -0.5f * settings.interPupilDistance;
eyePos.y = (!settings.trackPosition ? settings.headHeight : 0);
eyePos.z = (!settings.trackPosition ? settings.headDepth : 0);
eyePos += head.transform.localPosition;
Quaternion eyeRot; // left
float convergenceAngle = 0f;
if (settings.stereoConvergence > Mathf.Epsilon) convergenceAngle = Mathf.Rad2Deg * Mathf.Atan2(0.5f * settings.interPupilDistance, settings.stereoConvergence);
else if (settings.stereoConvergence < -Mathf.Epsilon) convergenceAngle = -Mathf.Rad2Deg * Mathf.Atan2(0.5f * settings.interPupilDistance, -settings.stereoConvergence);
eyeRot = Quaternion.Euler(settings.horizonElevation, -convergenceAngle, 0);
// left
if (leftCamera != null)
{
leftCamera.transform.localPosition = eyePos;
leftCamera.transform.localRotation = eyeRot;
}
if (leftOverlay != null)
{
leftOverlay.transform.localPosition = eyePos;
leftOverlay.transform.localRotation = eyeRot;
}
// right
eyePos.x *= -1;
eyeRot.y *= -1;
if (rightCamera != null)
{
rightCamera.transform.localPosition = eyePos;
rightCamera.transform.localRotation = eyeRot;
}
if (rightOverlay != null)
{
rightOverlay.transform.localPosition = eyePos;
rightOverlay.transform.localRotation = eyeRot;
}
// mono
eyePos.x = 0.0f;
eyeRot = Quaternion.identity;
if (monoCamera != null)
{
monoCamera.transform.localPosition = eyePos;
monoCamera.transform.localRotation = eyeRot;
}
if (monoOverlay != null)
{
monoOverlay.transform.localPosition = eyePos;
monoOverlay.transform.localRotation = eyeRot;
}
}
该方法实现逻辑比较简单，只是设置了leftCamera和rightCamera物体的初始位置。


InitializeEyes方法代码如下：

private void InitializeEyes()
        {
eyes.Clear();
if (monoCamera != null && monoCamera.gameObject.activeSelf)
{
AddEyes(monoCamera, SvrEye.eSide.Both);
}
if (leftCamera != null && leftCamera.gameObject.activeSelf)
{
AddEyes(leftCamera, SvrEye.eSide.Left);
}
if (rightCamera != null && rightCamera.gameObject.activeSelf)
{
AddEyes(rightCamera, SvrEye.eSide.Right);
}
for (int i = 0; i < SvrEye.Instances.Count; i++)
{
var eye = SvrEye.Instances;
if (!eyes.Contains(eye))
{
eyes.Add(eye); // Add eyes found outside of svr camera hierarchy
}
}
SvrPlugin.DeviceInfo info = plugin.deviceInfo;
                foreach(SvrEye eye in eyes)
                {
if (eye == null) continue;
eye.FovMargin = settings.eyeFovMargin;
                        eye.Format                                        = RenderTextureFormat.Default;
                        eye.Resolution                         = new Vector2(info.targetEyeWidthPixels, info.targetEyeHeightPixels);
                        eye.Depth                                         = (int)settings.eyeDepth;
                        eye.AntiAliasing                         = (int)settings.eyeAntiAliasing;        // hdr not supported with antialiasing
eye.FrustumType = (int)settings.frustumType;
eye.OnPreRenderListener = OnPreRenderListener;
eye.OnPostRenderListener = OnPostRenderListener;
eye.Initialize();
                }
        }该方法中在leftCamera以及rightCamera物体上添加了SvrEye脚本，并设置了SvrEye脚本中的相关属性，并执行了SvrEye中的初始化方法。


至此初始化方法的逻辑已经介绍完毕，下文将继续介绍Start方法中的其他逻辑。