Add stereo debugger for visually comparing rendered frames, ref #43

code/nel/include/nel/3d/stereo_debugger.h

@@ -0,0 +1,130 @@
+/**
+ * \file stereo_debugger.h
+ * \brief CStereoDebugger
+ * \date 2013-07-03 20:17GMT
+ * \author Jan Boon (Kaetemi)
+ * CStereoDebugger
+ */
+
+/* 
+ * Copyright (C) 2013  by authors
+ * 
+ * This file is part of NL3D.
+ * NL3D is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * NL3D 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 Affero General
+ * Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public
+ * License along with NL3D.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#if !FINAL_VERSION
+#ifndef NL3D_STEREO_DEBUGGER_H
+#define NL3D_STEREO_DEBUGGER_H
+#include <nel/misc/types_nl.h>
+
+// STL includes
+
+// NeL includes
+#include <nel/misc/smart_ptr.h>
+#include <nel/misc/geom_ext.h>
+
+// Project includes
+#include <nel/3d/stereo_display.h>
+#include <nel/3d/frustum.h>
+#include <nel/3d/viewport.h>
+#include <nel/3d/u_material.h>
+
+#define NL_STEREO_MAX_USER_CAMERAS 8
+
+namespace NL3D {
+
+class ITexture;
+class CTextureUser;
+class CPixelProgram;
+
+/**
+ * \brief CStereoDebugger
+ * \date 2013-07-03 20:17GMT
+ * \author Jan Boon (Kaetemi)
+ * CStereoDebugger
+ */
+class CStereoDebugger : public IStereoDisplay
+{
+public:
+	CStereoDebugger();
+	virtual ~CStereoDebugger();
+
+
+	/// Sets driver and generates necessary render targets
+	virtual void setDriver(NL3D::UDriver *driver);
+
+	/// Gets the required screen resolution for this device
+	virtual bool getScreenResolution(uint &width, uint &height);
+	/// Set latest camera position etcetera
+	virtual void updateCamera(uint cid, const NL3D::UCamera *camera);
+	/// Get the frustum to use for clipping
+	virtual void getClippingFrustum(uint cid, NL3D::UCamera *camera) const;
+
+	/// Is there a next pass
+	virtual bool nextPass();
+	/// Gets the current viewport
+	virtual const NL3D::CViewport &getCurrentViewport() const;
+	/// Gets the current camera frustum
+	virtual const NL3D::CFrustum &getCurrentFrustum(uint cid) const;
+	/// Gets the current camera frustum
+	virtual void getCurrentFrustum(uint cid, NL3D::UCamera *camera) const;
+	/// Gets the current camera matrix
+	virtual void getCurrentMatrix(uint cid, NL3D::UCamera *camera) const;
+
+	/// At the start of a new render target
+	virtual bool wantClear();	
+	/// The 3D scene
+	virtual bool wantScene();
+	/// Interface within the 3D scene
+	virtual bool wantInterface3D();	
+	/// 2D Interface
+	virtual bool wantInterface2D();
+
+	/// Returns true if a new render target was set, always fase if not using render targets
+	virtual bool beginRenderTarget();
+	/// Returns true if a render target was fully drawn, always false if not using render targets
+	virtual bool endRenderTarget();
+
+
+	static void listDevices(std::vector<CStereoDeviceInfo> &devicesOut);
+
+private:
+	UDriver *m_Driver;
+
+	int m_Stage;
+	int m_SubStage;
+
+	CViewport m_LeftViewport;
+	CViewport m_RightViewport;
+	CFrustum m_Frustum[NL_STEREO_MAX_USER_CAMERAS];
+	CMatrix m_CameraMatrix[NL_STEREO_MAX_USER_CAMERAS];
+
+	NLMISC::CSmartPtr<NL3D::ITexture> m_LeftTex;
+	NL3D::CTextureUser *m_LeftTexU;
+	NLMISC::CSmartPtr<NL3D::ITexture> m_RightTex;
+	NL3D::CTextureUser *m_RightTexU;
+	NL3D::UMaterial m_Mat;
+	NLMISC::CQuadUV m_QuadUV;
+	CPixelProgram *m_PixelProgram;
+
+}; /* class CStereoDebugger */
+
+} /* namespace NL3D */
+
+#endif /* #ifndef NL3D_STEREO_DEBUGGER_H */
+#endif /* #if !FINAL_VERSION */
+
+/* end of file */

code/nel/include/nel/3d/stereo_display.h

@@ -95,7 +95,7 @@ public:
 	virtual void setDriver(NL3D::UDriver *driver) = 0;
 	
 	/// Gets the required screen resolution for this device
-	virtual void getScreenResolution(uint &width, uint &height) = 0;
+	virtual bool getScreenResolution(uint &width, uint &height) = 0;
 	/// Set latest camera position etcetera
 	virtual void updateCamera(uint cid, const NL3D::UCamera *camera) = 0;
 	/// Get the frustum to use for clipping

code/nel/include/nel/3d/stereo_ovr.h

@@ -83,7 +83,7 @@ public:
 	virtual void setDriver(NL3D::UDriver *driver);
 
 	/// Gets the required screen resolution for this device
-	virtual void getScreenResolution(uint &width, uint &height);
+	virtual bool getScreenResolution(uint &width, uint &height);
 	/// Set latest camera position etcetera
 	virtual void updateCamera(uint cid, const NL3D::UCamera *camera);
 	/// Get the frustum to use for clipping

code/nel/src/3d/CMakeLists.txt

@@ -164,7 +164,9 @@ SOURCE_GROUP(Driver FILES
         vertex_program.cpp
         ../../include/nel/3d/vertex_program.h
         vertex_program_parse.cpp
-        ../../include/nel/3d/vertex_program_parse.h)
+        ../../include/nel/3d/vertex_program_parse.h
+        pixel_program.cpp
+        ../../include/nel/3d/pixel_program.h)
 
 SOURCE_GROUP(Font FILES
         computed_string.cpp
@@ -693,7 +695,9 @@ SOURCE_GROUP(Stereo FILES
         ../../include/nel/3d/stereo_hmd.h
 		stereo_ovr.cpp
 		stereo_ovr_fp.cpp
-        ../../include/nel/3d/stereo_ovr.h)
+        ../../include/nel/3d/stereo_ovr.h
+		stereo_debugger.cpp
+		../../include/nel/3d/stereo_debugger.h)
 
 NL_TARGET_LIB(nel3d ${HEADERS} ${SRC})
 

code/nel/src/3d/stereo_debugger.cpp

@@ -0,0 +1,350 @@
+/**
+ * \file stereo_debugger.cpp
+ * \brief CStereoDebugger
+ * \date 2013-07-03 20:17GMT
+ * \author Jan Boon (Kaetemi)
+ * CStereoDebugger
+ */
+
+/* 
+ * Copyright (C) 2013  by authors
+ * 
+ * This file is part of NL3D.
+ * NL3D is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * NL3D 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 Affero General
+ * Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public
+ * License along with NL3D.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#if !FINAL_VERSION
+#include <nel/misc/types_nl.h>
+#include <nel/3d/stereo_debugger.h>
+
+// STL includes
+
+// NeL includes
+// #include <nel/misc/debug.h>
+
+// Project includes
+#include <nel/3d/u_camera.h>
+#include <nel/3d/u_driver.h>
+#include <nel/3d/material.h>
+#include <nel/3d/texture_bloom.h>
+#include <nel/3d/texture_user.h>
+#include <nel/3d/driver_user.h>
+#include <nel/3d/u_texture.h>
+
+using namespace std;
+// using namespace NLMISC;
+
+namespace NL3D {
+
+namespace {
+
+const char *a_arbfp1 =
+	"!!ARBfp1.0\n"
+	"PARAM c[1] = { { 1, 0, 0.5 } };\n"
+	"TEMP R0;\n"
+	"TEMP R1;\n"
+	"TEMP R2;\n"
+	"TEX R0, fragment.texcoord[0], texture[0], 2D;\n"
+	"TEX R1, fragment.texcoord[0], texture[1], 2D;\n"
+	"ADD R2, R0, -R1;\n"
+	"ADD R1, R0, R1;\n"
+	"MUL R1, R1, c[0].z;\n"
+	"ABS R2, R2;\n"
+	"CMP R2, -R2, c[0].x, c[0].y;\n"
+	"ADD_SAT R2.x, R2, R2.y;\n"
+	"ADD_SAT R2.x, R2, R2.z;\n"
+	"ADD_SAT R2.x, R2, R2.w;\n"
+	"ABS R2.x, R2;\n"
+	"CMP R2.x, -R2, c[0].y, c[0];\n"
+	"ABS R0.x, R2;\n"
+	"CMP R2.x, -R0, c[0].y, c[0];\n"
+	"MOV R0.xzw, R1;\n"
+	"MAD R0.y, R1, c[0].z, c[0].z;\n"
+	"CMP R0, -R2.x, R1, R0;\n"
+	"MAD R1.x, R0, c[0].z, c[0].z;\n"
+	"CMP result.color.x, -R2, R1, R0;\n"
+	"MOV result.color.yzw, R0;\n"
+	"END\n";
+
+class CStereoDebuggerFactory : public IStereoDeviceFactory
+{
+public:
+	IStereoDisplay *createDevice() const
+	{
+		return new CStereoDebugger();
+	}
+};
+
+} /* anonymous namespace */
+
+CStereoDebugger::CStereoDebugger() : m_Driver(NULL), m_Stage(0), m_SubStage(0), m_LeftTexU(NULL), m_RightTexU(NULL), m_PixelProgram(NULL)
+{
+	
+}
+
+CStereoDebugger::~CStereoDebugger()
+{
+	if (!m_Mat.empty())
+	{
+		m_Mat.getObjectPtr()->setTexture(0, NULL);
+		m_Mat.getObjectPtr()->setTexture(1, NULL);
+		m_Driver->deleteMaterial(m_Mat);
+	}
+
+	delete m_LeftTexU;
+	m_LeftTexU = NULL;
+	m_LeftTex = NULL; // CSmartPtr
+
+	delete m_RightTexU;
+	m_RightTexU = NULL;
+	m_RightTex = NULL; // CSmartPtr
+
+	delete m_PixelProgram;
+	m_PixelProgram = NULL;
+
+	m_Driver = NULL;
+}
+
+/// Sets driver and generates necessary render targets
+void CStereoDebugger::setDriver(NL3D::UDriver *driver)
+{
+	nlassert(!m_PixelProgram);
+
+	NL3D::IDriver *drvInternal = (static_cast<CDriverUser *>(driver))->getDriver();	
+	/*if (drvInternal->supportPixelProgram(CPixelProgram::fp40) && drvInternal->supportBloomEffect() && drvInternal->supportNonPowerOfTwoTextures())
+	{
+		nldebug("VR: fp40");
+		m_PixelProgram = new CPixelProgram(a_fp40);		
+	}
+	else*/ if (drvInternal->supportPixelProgram(CPixelProgram::arbfp1) && drvInternal->supportBloomEffect() && drvInternal->supportNonPowerOfTwoTextures())
+	{
+		nldebug("VR: arbfp1");
+		m_PixelProgram = new CPixelProgram(a_arbfp1);		
+	}
+	/*else if (drvInternal->supportPixelProgram(CPixelProgram::ps_2_0))
+	{
+		nldebug("VR: ps_2_0");
+		m_PixelProgram = new CPixelProgram(a_ps_2_0);	
+	}*/
+
+	if (m_PixelProgram)
+	{
+		m_Driver = driver;
+
+		// todo: handle reso change!
+
+		uint32 width, height;
+		driver->getWindowSize(width, height);
+
+		m_LeftTex = new CTextureBloom();
+		m_LeftTex->setRenderTarget(true);
+		m_LeftTex->setReleasable(false);
+		m_LeftTex->resize(width, height);
+		m_LeftTex->setFilterMode(ITexture::Linear, ITexture::LinearMipMapOff);
+		m_LeftTex->setWrapS(ITexture::Clamp);
+		m_LeftTex->setWrapT(ITexture::Clamp);
+		drvInternal->setupTexture(*m_LeftTex);
+		m_LeftTexU = new CTextureUser(m_LeftTex);
+		nlassert(!drvInternal->isTextureRectangle(m_LeftTex)); // not allowed
+
+		m_RightTex = new CTextureBloom();
+		m_RightTex->setRenderTarget(true);
+		m_RightTex->setReleasable(false);
+		m_RightTex->resize(width, height);
+		m_RightTex->setFilterMode(ITexture::Linear, ITexture::LinearMipMapOff);
+		m_RightTex->setWrapS(ITexture::Clamp);
+		m_RightTex->setWrapT(ITexture::Clamp);
+		drvInternal->setupTexture(*m_RightTex);
+		m_RightTexU = new CTextureUser(m_RightTex);
+		nlassert(!drvInternal->isTextureRectangle(m_RightTex)); // not allowed
+
+
+		m_Mat = m_Driver->createMaterial();
+		m_Mat.initUnlit();
+		m_Mat.setColor(CRGBA::White);
+		m_Mat.setBlend (false);
+		m_Mat.setAlphaTest (false);
+		NL3D::CMaterial *mat = m_Mat.getObjectPtr();
+		mat->setShader(NL3D::CMaterial::PostProcessing);
+		mat->setBlendFunc(CMaterial::one, CMaterial::zero);
+		mat->setZWrite(false);
+		mat->setZFunc(CMaterial::always);
+		mat->setDoubleSided(true);
+		mat->setTexture(0, m_LeftTex);
+		mat->setTexture(1, m_RightTex);
+		
+
+		m_QuadUV.V0 = CVector(0.f, 0.f, 0.5f);
+		m_QuadUV.V1 = CVector(1.f, 0.f, 0.5f);
+		m_QuadUV.V2 = CVector(1.f, 1.f, 0.5f);
+		m_QuadUV.V3 = CVector(0.f, 1.f, 0.5f);
+
+		m_QuadUV.Uv0 = CUV(0.f,  0.f);
+		m_QuadUV.Uv1 = CUV(1.f, 0.f);
+		m_QuadUV.Uv2 = CUV(1.f, 1.f);
+		m_QuadUV.Uv3 = CUV(0.f,  1.f);
+	}
+}
+
+/// Gets the required screen resolution for this device
+bool CStereoDebugger::getScreenResolution(uint &width, uint &height)
+{
+	return false;
+}
+
+/// Set latest camera position etcetera
+void CStereoDebugger::updateCamera(uint cid, const NL3D::UCamera *camera)
+{
+	m_Frustum[cid] = camera->getFrustum();
+}
+
+/// Get the frustum to use for clipping
+void CStereoDebugger::getClippingFrustum(uint cid, NL3D::UCamera *camera) const
+{
+	// do nothing
+}
+
+/// Is there a next pass
+bool CStereoDebugger::nextPass()
+{
+	switch (m_Stage)
+	{
+	case 0:
+		++m_Stage;
+		m_SubStage = 0;
+		return true;
+	case 1:
+		++m_Stage;
+		m_SubStage = 0;
+		return true;
+	case 2:
+		m_Stage = 0;
+		m_SubStage = 0;
+		return false;
+	}
+}
+
+/// Gets the current viewport
+const NL3D::CViewport &CStereoDebugger::getCurrentViewport() const
+{
+	if (m_Stage % 2) return m_LeftViewport;
+	else return m_RightViewport;
+}
+
+/// Gets the current camera frustum
+const NL3D::CFrustum &CStereoDebugger::getCurrentFrustum(uint cid) const
+{
+	return m_Frustum[cid];
+}
+
+/// Gets the current camera frustum
+void CStereoDebugger::getCurrentFrustum(uint cid, NL3D::UCamera *camera) const
+{
+	// do nothing
+}
+
+/// Gets the current camera matrix
+void CStereoDebugger::getCurrentMatrix(uint cid, NL3D::UCamera *camera) const
+{
+	// do nothing
+}
+
+/// At the start of a new render target
+bool CStereoDebugger::wantClear()
+{
+	m_SubStage = 1;
+	return true;
+}
+	
+/// The 3D scene
+bool CStereoDebugger::wantScene()
+{
+	m_SubStage = 2;
+	return true;
+}
+
+/// Interface within the 3D scene
+bool CStereoDebugger::wantInterface3D()
+{
+	m_SubStage = 3;
+	return true;
+}
+	
+/// 2D Interface
+bool CStereoDebugger::wantInterface2D()
+{
+	m_SubStage = 4;
+	return true;
+}
+
+/// Returns true if a new render target was set, always fase if not using render targets
+bool CStereoDebugger::beginRenderTarget()
+{
+	if (m_Driver)
+	{
+		if (m_Stage % 2) static_cast<CDriverUser *>(m_Driver)->setRenderTarget(*m_RightTexU, 0, 0, 0, 0);
+		else static_cast<CDriverUser *>(m_Driver)->setRenderTarget(*m_LeftTexU, 0, 0, 0, 0);
+		return true;
+	}
+	return false;
+}
+
+/// Returns true if a render target was fully drawn, always false if not using render targets
+bool CStereoDebugger::endRenderTarget()
+{
+	if (m_Driver)
+	{
+		CTextureUser cu;
+		(static_cast<CDriverUser *>(m_Driver))->setRenderTarget(cu);
+		bool fogEnabled = m_Driver->fogEnabled();
+		m_Driver->enableFog(false);
+
+		m_Driver->setMatrixMode2D11();
+		CViewport vp = CViewport();
+		m_Driver->setViewport(vp);
+		uint32 width, height;
+		NL3D::IDriver *drvInternal = (static_cast<CDriverUser *>(m_Driver))->getDriver();
+		NL3D::CMaterial *mat = m_Mat.getObjectPtr();
+		mat->setTexture(0, m_LeftTex);
+		mat->setTexture(1, m_RightTex);
+		drvInternal->activePixelProgram(m_PixelProgram);
+
+		m_Driver->drawQuad(m_QuadUV, m_Mat);
+
+		drvInternal->activePixelProgram(NULL);
+		m_Driver->enableFog(fogEnabled);
+
+		return true;
+	}
+	return false;
+}
+
+void CStereoDebugger::listDevices(std::vector<CStereoDeviceInfo> &devicesOut)
+{
+	CStereoDeviceInfo devInfo;
+	devInfo.Factory = new CStereoDebuggerFactory();
+	devInfo.Library = CStereoDeviceInfo::NeL3D;
+	devInfo.Class = CStereoDeviceInfo::StereoDisplay;
+	devInfo.Manufacturer = "NeL";
+	devInfo.ProductName = "Stereo Debugger";
+	devInfo.Serial = "NL-3D-DEBUG";
+	devicesOut.push_back(devInfo);
+}
+
+} /* namespace NL3D */
+
+#endif /* #if !FINAL_VERSION */
+
+/* end of file */

code/nel/src/3d/stereo_display.cpp

@@ -35,6 +35,7 @@
 
 // Project includes
 #include <nel/3d/stereo_ovr.h>
+#include <nel/3d/stereo_debugger.h>
 
 using namespace std;
 // using namespace NLMISC;
@@ -75,6 +76,9 @@ const char *IStereoDisplay::getLibraryName(CStereoDeviceInfo::TStereoDeviceLibra
 void IStereoDisplay::listDevices(std::vector<CStereoDeviceInfo> &devicesOut)
 {
 	CStereoOVR::listDevices(devicesOut);
+#if !FINAL_VERSION
+	CStereoDebugger::listDevices(devicesOut);
+#endif
 }
 
 IStereoDisplay *IStereoDisplay::createDevice(const CStereoDeviceInfo &deviceInfo)

code/nel/src/3d/stereo_ovr.cpp

@@ -145,6 +145,7 @@ sint s_DeviceCounter = 0;
 class CStereoOVRDeviceHandle : public IStereoDeviceFactory
 {
 public:
+	// fixme: virtual destructor???
 	OVR::DeviceEnumerator<OVR::HMDDevice> DeviceHandle;
 	IStereoDisplay *createDevice() const
 	{
@@ -311,10 +312,11 @@ void CStereoOVR::setDriver(NL3D::UDriver *driver)
 	}
 }
 
-void CStereoOVR::getScreenResolution(uint &width, uint &height)
+bool CStereoOVR::getScreenResolution(uint &width, uint &height)
 {
 	width = m_DevicePtr->HMDInfo.HResolution;
 	height = m_DevicePtr->HMDInfo.VResolution;
+	return true;
 }
 
 void CStereoOVR::initCamera(uint cid, const NL3D::UCamera *camera)

code/nel/src/3d/stereo_ovr_fp.cpp

@@ -3,6 +3,7 @@
 Filename    :   stereo_ovf_fp.cpp
 Content     :   Barrel fragment program compiled to a blob of assembly
 Created     :   July 01, 2013
+Modified by :   Jan Boon (Kaetemi)
 
 Copyright   :   Copyright 2012 Oculus VR, Inc. All Rights reserved.
 

code/snowballs2/bin/pp_oculus_vr.cg

@@ -0,0 +1,54 @@
+/************************************************************************************
+
+Filename    :   pp_oculus_vr.cg
+Content     :   Barrel fragment program ported from Oculus SDK Samples to Cg
+Created     :   July 01, 2013
+Modified by :   Jan Boon (Kaetemi)
+
+Copyright   :   Copyright 2012 Oculus VR, Inc. All Rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+************************************************************************************/
+
+
+void pp_oculus_vr(
+	// Per fragment parameters
+	float2 texCoord : TEXCOORD0,  
+	
+	// Fragment program constants
+	uniform float2 cLensCenter,
+	uniform float2 cScreenCenter,
+	uniform float2 cScale,
+	uniform float2 cScaleIn,
+	uniform float4 cHmdWarpParam,
+	uniform sampler2D cTex0 : TEX0, 
+	
+	// Output color
+	out float4 oCol : COLOR)
+{
+	float2 theta = (texCoord - cLensCenter) * cScaleIn; // Scales to [-1, 1]
+    float rSq = theta.x * theta.x + theta.y * theta.y;
+    float2 theta1 = theta * (cHmdWarpParam.x + cHmdWarpParam.y * rSq + 
+		cHmdWarpParam.z * rSq * rSq + cHmdWarpParam.w * rSq * rSq * rSq);
+    float2 tc = cLensCenter + cScale * theta1;
+	
+	if (!all(equal(clamp(tc, cScreenCenter-float2(0.25,0.5), cScreenCenter+float2(0.25,0.5)), tc)))
+	{
+		oCol = float4(0, 0, 0, 0);
+	}
+    else
+	{
+		oCol = tex2D(cTex0, tc);
+	}
+}

code/snowballs2/bin/pp_stereo_debug.cg

@@ -0,0 +1,25 @@
+
+void pp_stereo_debug(
+	// Per fragment parameters
+	float2 texCoord : TEXCOORD0,  
+	
+	// Fragment program constants
+	uniform sampler2D cTex0 : TEX0,
+	uniform sampler2D cTex1 : TEX1, 
+	
+	// Output color
+	out float4 oCol : COLOR)
+{
+	float4 t1 = tex2D(cTex0, texCoord);
+	float4 t2 = tex2D(cTex1, texCoord);
+	if (!any(t1 - t2))
+	{
+		oCol = (t1 * 0.5) + (t2 * 0.5);
+		oCol.g = 0.5 + (oCol.g * 0.5);
+	}
+	else
+	{
+		oCol = (t1 * 0.5) + (t2 * 0.5);
+		oCol.r = 0.5 + (oCol.r * 0.5);
+	}
+}

code/snowballs2/client/src/camera.cpp

@@ -124,8 +124,8 @@ void	initCamera()
 				StereoDisplay->setDriver(Driver); // move after driver creation, move stereodisplay before driver creation
 			}
 		}
-		IStereoDisplay::releaseUnusedLibraries();
 	}
+	IStereoDisplay::releaseUnusedLibraries();
 
 	// Set up directly the camera
 	Camera = Scene->getCam();