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/*
* Copyright (C) 2013 Robert Kooima
*
* NEVERBALL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <OVR.h>
extern "C"
{
#include "hmd_common.h"
#include "config.h"
#include "glext.h"
#include "video.h"
}
/*---------------------------------------------------------------------------*/
static OVR::Ptr<OVR::DeviceManager> pManager;
static OVR::Ptr<OVR::HMDDevice> pHMD;
static OVR::Ptr<OVR::SensorDevice> pSensor;
static OVR::SensorFusion *pFusion;
static OVR::HMDInfo Info;
static OVR::Util::Render::StereoConfig Stereo;
static OVR::Util::Render::StereoEyeParams Params;
/*---------------------------------------------------------------------------*/
static void hmd_matrix(OVR::Matrix4f& M)
{
GLdouble T[16];
T[ 0] = (GLdouble) M.M[0][0];
T[ 1] = (GLdouble) M.M[1][0];
T[ 2] = (GLdouble) M.M[2][0];
T[ 3] = (GLdouble) M.M[3][0];
T[ 4] = (GLdouble) M.M[0][1];
T[ 5] = (GLdouble) M.M[1][1];
T[ 6] = (GLdouble) M.M[2][1];
T[ 7] = (GLdouble) M.M[3][1];
T[ 8] = (GLdouble) M.M[0][2];
T[ 9] = (GLdouble) M.M[1][2];
T[10] = (GLdouble) M.M[2][2];
T[11] = (GLdouble) M.M[3][2];
T[12] = (GLdouble) M.M[0][3];
T[13] = (GLdouble) M.M[1][3];
T[14] = (GLdouble) M.M[2][3];
T[15] = (GLdouble) M.M[3][3];
glLoadMatrixd(T);
}
/*---------------------------------------------------------------------------*/
extern "C" int hmd_stat()
{
return (config_get_d(CONFIG_HMD) && hmd_common_stat());
}
extern "C" void hmd_init()
{
/* Set default HMD info for a 7" OVR DK1 in case OVR fails. */
Info.DesktopX = 0;
Info.DesktopY = 0;
Info.HResolution = video.device_w;
Info.VResolution = video.device_h;
Info.HScreenSize = 0.14976f;
Info.VScreenSize = 0.09350f;
Info.InterpupillaryDistance = 0.0640f;
Info.LensSeparationDistance = 0.0635f;
Info.EyeToScreenDistance = 0.0410f;
Info.VScreenCenter = Info.VScreenSize * 0.5f;
Info.DistortionK[0] = 1.00f;
Info.DistortionK[1] = 0.22f;
Info.DistortionK[2] = 0.24f;
Info.DistortionK[3] = 0.00f;
Info.ChromaAbCorrection[0] = 0.996f;
Info.ChromaAbCorrection[1] = -0.004f;
Info.ChromaAbCorrection[2] = 1.014f;
Info.ChromaAbCorrection[3] = 0.000f;
/* Initialize OVR, the device, the sensor, and the sensor fusion. */
OVR::System::Init(OVR::Log::ConfigureDefaultLog(OVR::LogMask_All));
if (OVR::System::IsInitialized())
{
if ((pManager = *OVR::DeviceManager::Create()))
{
if ((pHMD = *pManager->EnumerateDevices<OVR::HMDDevice>().CreateDevice()))
{
if ((pSensor = *pHMD->GetSensor()))
{
pFusion = new OVR::SensorFusion();
pFusion->AttachToSensor(pSensor);
pHMD->GetDeviceInfo(&Info);
}
}
}
}
/* Set up the stereo config using the HMD info. */
using namespace OVR::Util::Render;
Stereo.SetHMDInfo(Info);
Stereo.SetDistortionFitPointVP(-1.0f, 0.0f);
Stereo.SetStereoMode(Stereo_LeftRight_Multipass);
Stereo.SetFullViewport(Viewport(0, 0, Info.HResolution,
Info.VResolution));
hmd_common_init(Info.HResolution, Info.VResolution);
}
extern "C" void hmd_free()
{
hmd_common_free();
delete pFusion;
pSensor = 0;
pHMD = 0;
pManager = 0;
OVR::System::Destroy();
}
extern "C" void hmd_step()
{
/* LibOVR is threaded. No synchronous update is necessary. */
}
extern "C" void hmd_swap()
{
float center = 1 - (2 * Info.LensSeparationDistance) / Info.HScreenSize;
float scale = Stereo.GetDistortionScale();
hmd_common_swap(center, scale, Info.DistortionK, Info.ChromaAbCorrection);
}
extern "C" void hmd_prep_left()
{
hmd_common_left();
Params = Stereo.GetEyeRenderParams(OVR::Util::Render::StereoEye_Left);
}
extern "C" void hmd_prep_right()
{
hmd_common_right();
Params = Stereo.GetEyeRenderParams(OVR::Util::Render::StereoEye_Right);
}
extern "C" void hmd_persp(float n, float f)
{
/* Projection and view matrices. */
glMatrixMode(GL_PROJECTION);
hmd_matrix(Params.Projection);
glMatrixMode(GL_MODELVIEW);
hmd_matrix(Params.ViewAdjust);
/* Head orientation. */
if (pSensor)
{
OVR::Vector3f v;
float a;
pFusion->GetOrientation().GetAxisAngle(&v, &a);
glTranslatef(0.0f, -0.1f, 0.f);
glRotatef(OVR::RadToDegree(-a), v.x, v.y, v.z);
glTranslatef(0.0f, +0.1f, 0.f);
}
}
extern "C" void hmd_ortho()
{
hmd_persp(0.5f, 2.0f);
int w = video.device_w;
int h = video.device_h;
glScalef ( 1.25f / h, 1.25f / h, 1.0f);
glTranslatef(-0.50f * w, -0.50f * h, -1.0f);
}
/*---------------------------------------------------------------------------*/
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