【发布时间】：2016-08-03 13:35:08
【问题描述】：
我正在尝试使用 Oculus 进行基本测试 我使用 PC SDK 1.6、OpenGL 和 Qt。
我首先从https://developer.oculus.com/documentation/pcsdk/latest/concepts/dg-render/开始
然后我看了不同的话题，但我不知道我做错了什么，尤其是我的错误在哪里..
它接缝初始化部分是正确的。 Oculus 显示健康警告消息，但一旦健康警告消息消失，我看到的只是黑屏。
这里是我使用的代码：
OculusManager.h
#ifndef OCULUSMANAGER_H
#define OCULUSMANAGER_H
#include "main.h"
#include <OVR_CAPI_GL.h>
#include <QtGui/qopengl.h>
#include <QOpenGLFunctions_4_3_Compatibility>
class OculusManager : protected QOpenGLFunctions_4_3_Compatibility
{
public:
OculusManager();
bool initLibOVR();
void displayLastError();
void run();
void shutdown();
void destroy();
private:
bool mainLoop(bool value);
ovrSession session;
ovrGraphicsLuid luid;
bool isOVRLibLoaded = false;
ovrHmdDesc hmdDesc;
ovrSizei bufferSize;
ovrTextureSwapChain textureSwapChain;
ovrLayerEyeFov layer;
// Initialize VR structures, filling out description.
ovrEyeRenderDesc eyeRenderDesc[2];
ovrVector3f hmdToEyeViewOffset[2];
ovrVector3f hmdToEyeOffset[2];
double sensorSampleTime;
bool isVisible = true;
// it needs to be updated each new frame
long long frameIndex = 0;
// Initialize a default Pose
ovrPosef eyeRenderPose[2];
bool end = false;
void openglError();
};
#endif // OCULUSMANAGER_H
OculusManager.cpp
#include "oculusmanager.h"
OculusManager::OculusManager()
{
}
bool OculusManager::initLibOVR(){
if(initializeOpenGLFunctions() == false){
qDebug() << "Impossible to load OpenGL functions";
return false;
}
glEnable(GL_TEXTURE_2D);
glEnable(GL_DEPTH_TEST);
// Accept fragment if it closer to the camera than the former one
glDepthFunc(GL_LESS);
glEnable(GL_CULL_FACE);
glShadeModel(GL_SMOOTH); // Enable Smooth Shading
glClearDepth(1.0f); // Depth Buffer Setup
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations
//background color
glClearColor(0., 0., 0., 1.0);
if(OVR_FAILURE(ovr_Initialize(nullptr)))
{
return false;
}
if (OVR_FAILURE(ovr_Create(&session, &luid)))
{
return false;
}
//main code
hmdDesc = ovr_GetHmdDesc(session);
ovrSizei recommenedTex0Size = ovr_GetFovTextureSize(session, ovrEye_Left, hmdDesc.DefaultEyeFov[0], 1.0f);
ovrSizei recommenedTex1Size = ovr_GetFovTextureSize(session, ovrEye_Right,hmdDesc.DefaultEyeFov[1], 1.0f);
bufferSize;
bufferSize.w = recommenedTex0Size.w + recommenedTex1Size.w;
bufferSize.h = std::max( recommenedTex0Size.h, recommenedTex1Size.h );
ovrTextureSwapChainDesc ovrTextdesc = {};
ovrTextdesc.Type = ovrTexture_2D;
ovrTextdesc.ArraySize = 1;
ovrTextdesc.Format = OVR_FORMAT_R8G8B8A8_UNORM_SRGB;
ovrTextdesc.Width = bufferSize.w;
ovrTextdesc.Height = bufferSize.h;
ovrTextdesc.MipLevels = 1;
ovrTextdesc.SampleCount = 1;
ovrTextdesc.StaticImage = ovrFalse;
if(OVR_SUCCESS(ovr_CreateTextureSwapChainGL(session, &ovrTextdesc, &textureSwapChain)))
{
int length = 0;
if (OVR_FAILURE(ovr_GetTextureSwapChainLength(session, textureSwapChain, &length))){
return false;
}
for (int i = 0; i < length; ++i)
{
GLuint chainTexId;
if (OVR_FAILURE(ovr_GetTextureSwapChainBufferGL(session, textureSwapChain, i, &chainTexId))){
return false;
}
glBindTexture(GL_TEXTURE_2D, chainTexId);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
// Generate frame buffer to render
GLuint fboID;
glGenFramebuffers(1, &fboID);
// Generate depth buffer of the frame buffer
GLuint depthBuffID;
glGenTextures(1, &depthBuffID);
glBindTexture(GL_TEXTURE_2D, depthBuffID);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
GLenum internalFormat = GL_DEPTH_COMPONENT24;
GLenum type = GL_UNSIGNED_INT;
glTexImage2D(GL_TEXTURE_2D, 0, internalFormat, bufferSize.w, bufferSize.h, 0, GL_DEPTH_COMPONENT, type, NULL);
// FloorLevel will give tracking poses where the floor height is 0
ovr_SetTrackingOriginType(session, ovrTrackingOrigin_FloorLevel);
eyeRenderDesc[0] = ovr_GetRenderDesc(session, ovrEye_Left, hmdDesc.DefaultEyeFov[0]);
eyeRenderDesc[1] = ovr_GetRenderDesc(session, ovrEye_Right, hmdDesc.DefaultEyeFov[1]);
hmdToEyeViewOffset[0] = eyeRenderDesc[0].HmdToEyeOffset;
hmdToEyeViewOffset[1] = eyeRenderDesc[1].HmdToEyeOffset;
// Initialize our single full screen Fov layer.
layer.Header.Type = ovrLayerType_EyeFov;
layer.Header.Flags = 0;
layer.ColorTexture[0] = textureSwapChain;
layer.ColorTexture[1] = textureSwapChain;
layer.Fov[0] = eyeRenderDesc[0].Fov;
layer.Fov[1] = eyeRenderDesc[1].Fov;
ovrSizei rectsize;
rectsize.w = bufferSize.w / 2;
rectsize.h = bufferSize.h;
ovrVector2i rectPosL;
rectPosL.x = 0;
rectPosL.y = 0;
ovrVector2i rectPosR;
rectPosR.x = bufferSize.w / 2;
rectPosR.y = 0;
ovrRecti rectLeft, rectRight;
rectLeft.Pos = rectPosL;
rectLeft.Size = rectsize;
rectRight.Pos = rectPosR;
rectRight.Size = rectsize;
layer.Viewport[0] = rectLeft;
layer.Viewport[1] = rectRight;
// ld.RenderPose and ld.SensorSampleTime are updated later per frame.
isOVRLibLoaded = true;
}
return isOVRLibLoaded;
}
void OculusManager::run(){
mainLoop(true);
}
bool OculusManager::mainLoop(bool value){
// Get both eye poses simultaneously, with IPD offset already included.
double displayMidpointSeconds = ovr_GetPredictedDisplayTime(session, 0);
ovrTrackingState hmdState = ovr_GetTrackingState(session, displayMidpointSeconds, ovrTrue);
ovr_CalcEyePoses(hmdState.HeadPose.ThePose, hmdToEyeViewOffset, layer.RenderPose);
openglError();
// qDebug() << hmdState.HeadPose.ThePose.Position.x << hmdState.HeadPose.ThePose.Position.y << hmdState.HeadPose.ThePose.Position.z;
// Get texture swap index where we must draw our frame
GLuint curTexId;
// Get next available index of the texture swap chain
int currentIndex = 0;
ovr_GetTextureSwapChainCurrentIndex(session, textureSwapChain, ¤tIndex);
ovr_GetTextureSwapChainBufferGL(session, textureSwapChain, currentIndex, &curTexId);
// Call ovr_GetRenderDesc each frame to get the ovrEyeRenderDesc, as the returned values (e.g. HmdToEyeOffset) may change at runtime.
eyeRenderDesc[0] = ovr_GetRenderDesc(session, ovrEye_Left, hmdDesc.DefaultEyeFov[0]);
eyeRenderDesc[1] = ovr_GetRenderDesc(session, ovrEye_Right, hmdDesc.DefaultEyeFov[1]);
hmdToEyeOffset[0] = eyeRenderDesc[0].HmdToEyeOffset;
hmdToEyeOffset[1] = eyeRenderDesc[1].HmdToEyeOffset;
// Get eye poses, feeding in correct IPD offset
ovr_GetEyePoses(session, frameIndex, ovrTrue, hmdToEyeOffset, eyeRenderPose, &sensorSampleTime);
if (isVisible)
{
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, 0, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
// Clear the frame buffer
// Render Scene to Eye Buffers
for (int eye = 0; eye < 2; eye++)
{
// Set the left or right vertical half of the buffer as the viewport
glViewport(eye == ovrEye_Left ? 0 : bufferSize.w / 2, 0, bufferSize.w / 2, bufferSize.h);
glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, 0);
}
// Do not forget to increment the frameIndex!
frameIndex++;
// Commit the changes to the texture swap chain
ovr_CommitTextureSwapChain(session, textureSwapChain);
}
layer.Header.Type = ovrLayerType_EyeFov;
// Tell to the Oculus compositor that our texture origin is at the bottom left
layer.Header.Flags = ovrLayerFlag_TextureOriginAtBottomLeft; // Because OpenGL | Disable head tracking
// Set the Oculus layer eye field of view for each view
for (int eye = 0; eye < 2; ++eye)
{
// Set the color texture as the current swap texture
layer.ColorTexture[eye] = textureSwapChain;
// Set the viewport as the right or left vertical half part of the color texture
ovrRecti rect;
rect.Pos.x = eye == ovrEye_Left ? 0 : bufferSize.w / 2;
rect.Pos.y = 0;
rect.Size.h = bufferSize.h;
rect.Size.w = bufferSize.w / 2;
layer.Viewport[eye] =rect;
// Set the field of view
layer.Fov[eye] = hmdDesc.DefaultEyeFov[eye];
// Set the pose matrix
layer.RenderPose[eye] = eyeRenderPose[eye];
}
layer.SensorSampleTime = sensorSampleTime;
// Submit frame with one layer we have.
ovrLayerHeader* layers = &layer.Header;
ovrResult result = ovr_SubmitFrame(session, 0, nullptr, &layers, 1);
if(OVR_FAILURE(result)){
qDebug() << "ovr_submitFrame failed";
}
isVisible = (result == ovrSuccess);
//TODO if response is lost, destroy everything here
//TODO if response is lost, destroy everything here
//TODO if response is lost, destroy everything here
//TODO if response is lost, destroy everything here
// This is not really needed for this application but it may be usefull for an more advanced application
ovrSessionStatus sessionStatus;
ovr_GetSessionStatus(session, &sessionStatus);
if (sessionStatus.ShouldRecenter)
{
qDebug() << "Recenter Tracking asked by Session" ;
ovr_RecenterTrackingOrigin(session);
}
return true;
}
void OculusManager::openglError(){
GLenum error = glGetError();
while(error !=0){
qDebug() << "error gl : " << error;
error = glGetError();
}
}
void OculusManager::displayLastError(){
ovrErrorInfo errorInfo;
ovr_GetLastErrorInfo(&errorInfo);
qDebug() << "Oculus Manager error : " << errorInfo.ErrorString;
}
void OculusManager::shutdown(){
ovr_Shutdown();
}
void OculusManager::destroy(){
ovr_Destroy(session);
}
提前感谢您的帮助
可能重复但没有帮助我：
【问题讨论】：