public void Render(VRRenderEventDetector detector)
{
// move stereo camera around based on HMD pose
MoveStereoCameraBasedOnHmdPose(detector);
// invoke pre-render events
if (preRenderListeners != null)
{
preRenderListeners.Invoke();
}
if (canvasVisible)
{
// change layer of specified objects,
// so that they become invisible to currect camera
ignoreObjOriginalLayer.Clear();
for (int i = 0; i < ignoreWhenRender.Count; i++)
{
ignoreObjOriginalLayer.Add(ignoreWhenRender[i].layer);
}
// invert backface culling when rendering a mirror
if (isMirror)
{
GL.invertCulling = true;
}
// render the canvas
RenderToTwoStereoTextures(detector);
// reset backface culling
if (isMirror)
{
GL.invertCulling = false;
}
// resume object layers
for (int i = 0; i < ignoreWhenRender.Count; i++)
{
ignoreWhenRender[i].layer = ignoreObjOriginalLayer[i];
}
// finish this render pass, reset visibility
canvasVisible = false;
}
// invoke post-render events
if (postRenderListeners != null)
{
postRenderListeners.Invoke();
}
}
/////////////////////////////////////////////////////////////////////////////////
// render related
public void InvokeStereoRenderers(VRRenderEventDetector detector)
{
// render registored stereo cameras
for (int renderIter = 0; renderIter < stereoRenderers.Count; renderIter++)
{
StereoRenderer stereoRenderer = stereoRenderers[renderIter];
if (stereoRenderer.shouldRender)
{
stereoRenderer.Render(detector);
}
}
}
private void RenderToTwoStereoTextures(VRRenderEventDetector detector)
{
float ipd = 0.06567926f;
var leftEyeOffset = new Vector3(-ipd / 2, 0, 0);
var rightEyeOffset = new Vector3(ipd / 2, 0, 0);
int hash = detector.GetHashCode();
int renderWidth = (int)(textureResolutionScale * detector.Camera.pixelWidth);
int renderHeight = (int)(textureResolutionScale * detector.Camera.pixelHeight);
if (!leftEyeTextures.ContainsKey(hash))
{
leftEyeTextures.Add(hash, CreateRenderTexture(renderWidth, renderHeight));
}
if (!rightEyeTextures.ContainsKey(hash))
{
rightEyeTextures.Add(hash, CreateRenderTexture(renderWidth, renderHeight));
}
Matrix4x4 leftProjectionMatrix = detector.Camera.projectionMatrix;
Matrix4x4 rightProjectionMatrix = detector.Camera.projectionMatrix;
if (detector.Camera.stereoEnabled)
{
leftProjectionMatrix = detector.Camera.GetStereoProjectionMatrix(Camera.StereoscopicEye.Left);
rightProjectionMatrix = detector.Camera.GetStereoProjectionMatrix(Camera.StereoscopicEye.Right);
}
// render stereo textures
RenderEye(
leftEyeOffset,
leftProjectionMatrix, detector.Camera.worldToCameraMatrix,
leftEyeTextures[hash], "_LeftEyeTexture");
if (detector.Camera.stereoEnabled)
{
var rightEyeWorldToCameraMatrix = detector.Camera.worldToCameraMatrix;
rightEyeWorldToCameraMatrix.m03 -= ipd;
RenderEye(
rightEyeOffset,
rightProjectionMatrix, rightEyeWorldToCameraMatrix,
rightEyeTextures[hash], "_RightEyeTexture");
}
}
public void MoveStereoCameraBasedOnHmdPose(VRRenderEventDetector detector)
{
Vector3 mainCamPos = detector.transform.position;
Quaternion mainCamRot = detector.transform.rotation;
if (isMirror)
{
// get reflection plane -- assume +y as normal
float d = -Vector3.Dot(canvasOriginUp, canvasOriginPos);
Vector4 reflectionPlane = new Vector4(canvasOriginUp.x, canvasOriginUp.y, canvasOriginUp.z, d);
// get reflection matrix
reflectionMat = Matrix4x4.zero;
CalculateReflectionMatrix(ref reflectionMat, reflectionPlane);
// set head position
Vector3 reflectedPos = reflectionMat.MultiplyPoint(mainCamPos);
stereoCameraHead.transform.position = reflectedPos;
// set head orientation
stereoCameraHead.transform.rotation = mainCamRot;
}
else
{
Vector3 posCanvasToMainCam = mainCamPos - canvasOriginPos;
// compute the rotation between the portal entry and the portal exit
Quaternion rotCanvasToAnchor = anchorRot * Quaternion.Inverse(canvasOriginRot);
// move remote camera position
Vector3 posAnchorToStereoCam = rotCanvasToAnchor * posCanvasToMainCam;
stereoCameraHead.transform.position = anchorPos + posAnchorToStereoCam;
// rotate remote camera
stereoCameraHead.transform.rotation = rotCanvasToAnchor * mainCamRot;
}
}
