/// <summary>
/// Populates the list of cameras according to the cameras that should be used for
/// the current game scene.
/// </summary>
/// <param name="cameraNames">An array of camera names to use for this VR scene.</param>
private void PopulateCameraList(string[] cameraNames)
{
// search for the cameras to render
NumVRCameras = cameraNames.Length;
VRCameras = new Types.CameraData[NumVRCameras];
for (int i = 0; i < NumVRCameras; i++)
{
Camera foundCamera = Array.Find(Camera.allCameras, cam => cam.name.Equals(cameraNames[i]));
if (foundCamera == null)
{
Utils.LogError("Could not find camera \"" + cameraNames[i] + "\" in the scene!");
}
else
{
// determine clip plane and new projection matrices
float nearClipPlane = (foundCamera.name.Equals("Camera 01")) ? 0.05f : foundCamera.nearClipPlane;
HmdMatrix44_t projectionMatrixL = OpenVR.System.GetProjectionMatrix(EVREye.Eye_Left, nearClipPlane, foundCamera.farClipPlane);
HmdMatrix44_t projectionMatrixR = OpenVR.System.GetProjectionMatrix(EVREye.Eye_Right, nearClipPlane, foundCamera.farClipPlane);
// store information about the camera
VRCameras[i].camera = foundCamera;
VRCameras[i].originalProjectionMatrix = foundCamera.projectionMatrix;
VRCameras[i].hmdProjectionMatrixL = MathUtils.Matrix4x4_OpenVr2UnityFormat(ref projectionMatrixL);
VRCameras[i].hmdProjectionMatrixR = MathUtils.Matrix4x4_OpenVr2UnityFormat(ref projectionMatrixR);
// disable the camera so we can call Render directly
foundCamera.enabled = false;
}
}
}
/// <summary>
/// Renders a set of cameras onto a RenderTexture, and submit the frame to the HMD.
/// </summary>
private void RenderHmdCameras(
EVREye eye,
SteamVR_Utils.RigidTransform hmdTransform,
SteamVR_Utils.RigidTransform hmdEyeTransform,
RenderTexture hmdEyeRenderTexture,
Texture_t hmdEyeTexture)
{
/**
* hmdEyeTransform is in a coordinate system that follows the headset, where
* the origin is the headset device position. Therefore the eyes are at a constant
* offset from the device. hmdEyeTransform does not change (per eye).
* hmdEyeTransform.x+ towards the right of the headset
* hmdEyeTransform.y+ towards the top the headset
* hmdEyeTransform.z+ towards the front of the headset
*
* hmdTransform is in a coordinate system set in physical space, where the
* origin is the initial seated position. Or for room-scale, the physical origin of the room.
* hmdTransform.x+ towards the right
* hmdTransform.y+ upwards
* hmdTransform.z+ towards the front
*
* Scene.InitialPosition and Scene.InitialRotation are the Unity world coordinates where
* we initialize the VR scene, i.e. the origin of a coordinate system that maps
* 1-to-1 with physical space.
*
* 1. Calculate the position of the eye in the physical coordinate system.
* 2. Transform the calculated position into Unity world coordinates, offset from
* InitialPosition and InitialRotation.
*/
// position of the eye in the VR reference frame
Vector3 positionToEye = hmdTransform.pos + hmdTransform.rot * hmdEyeTransform.pos;
// update position of the cameras
Scene.Instance.UpdateScene(eye, hmdTransform, hmdEyeTransform);
// render the set of cameras
for (int i = 0; i < Scene.Instance.NumVRCameras; i++)
{
Types.CameraData camData = Scene.Instance.VRCameras[i];
// set projection matrix
camData.camera.projectionMatrix = (eye == EVREye.Eye_Left) ?
camData.hmdProjectionMatrixL : camData.hmdProjectionMatrixR;
// set texture to render to, then render
camData.camera.targetTexture = hmdEyeRenderTexture;
camData.camera.Render();
}
hmdEyeTexture.handle = hmdEyeRenderTexture.GetNativeTexturePtr();
// Submit frames to HMD
EVRCompositorError vrCompositorError = OpenVR.Compositor.Submit(eye, ref hmdEyeTexture, ref hmdTextureBounds, EVRSubmitFlags.Submit_Default);
if (vrCompositorError != EVRCompositorError.None)
{
throw new Exception("Submit (" + eye + ") failed: (" + (int)vrCompositorError + ") " + vrCompositorError.ToString());
}
}
/// <summary>
/// Populates the list of cameras according to the cameras that should be used for
/// the current game scene.
/// </summary>
/// <param name="cameraNames">An array of camera names to use for this VR scene.</param>
private void PopulateCameraList(string[] cameraNames)
{
// search for the cameras to render
NumVRCameras = cameraNames.Length;
VRCameras = new Types.CameraData[NumVRCameras];
for (int i = 0; i < NumVRCameras; i++)
{
Camera foundCamera = Array.Find(Camera.allCameras, cam => cam.name.Equals(cameraNames[i]));
if (foundCamera == null)
{
Utils.LogError("Could not find camera \"" + cameraNames[i] + "\" in the scene!");
}
else
{
// determine clip plane and new projection matrices
HmdMatrix44_t projectionMatrixL = OpenVR.System.GetProjectionMatrix(EVREye.Eye_Left, foundCamera.nearClipPlane, foundCamera.farClipPlane);
HmdMatrix44_t projectionMatrixR = OpenVR.System.GetProjectionMatrix(EVREye.Eye_Right, foundCamera.nearClipPlane, foundCamera.farClipPlane);
// store information about the camera
VRCameras[i].camera = foundCamera;
VRCameras[i].originalProjectionMatrix = foundCamera.projectionMatrix;
VRCameras[i].hmdProjectionMatrixL = MathUtils.Matrix4x4_OpenVr2UnityFormat(ref projectionMatrixL);
VRCameras[i].hmdProjectionMatrixR = MathUtils.Matrix4x4_OpenVr2UnityFormat(ref projectionMatrixR);
// disable the camera so we can call Render directly
foundCamera.enabled = false;
// cache the galaxy camera object, we'll need to call on it directly during eyeball positioning
if (foundCamera.name == "GalaxyCamera")
{
galaxyCamera = foundCamera.gameObject;
}
else if (foundCamera.name == "Landscape Camera")
{
landscapeCamera = foundCamera.gameObject;
}
}
}
}
