Add 2D interface shifting calculations, see #43

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

@@ -95,6 +95,8 @@ public:
 	/// Gets the current viewport
 	virtual const NL3D::CViewport &getCurrentViewport() const;
 	/// Gets the current camera frustum
+	virtual const NL3D::CFrustum &getCurrentFrustum() const;
+	/// Gets the current camera frustum
 	virtual void getCurrentFrustum(NL3D::UCamera *camera) const;
 	/// Gets the current camera matrix
 	virtual void getCurrentMatrix(NL3D::UCamera *camera) const;
@@ -119,6 +121,8 @@ public:
 
 	/// Get the HMD orientation
 	virtual NLMISC::CQuat getOrientation() const;
+	/// Get GUI center (1 = width, 1 = height, 0 = center) (todo: move to CStereoHMD)
+	void getInterface2DShift(float &x, float &y, float distance);
 
 
 	static void listDevices(std::vector<CStereoDeviceInfo> &devicesOut);
@@ -140,6 +144,8 @@ private:
 	CFrustum m_LeftFrustum;
 	CFrustum m_RightFrustum;
 	CMatrix m_CameraMatrix;
+	mutable bool m_OrientationCached;
+	mutable NLMISC::CQuat m_OrientationCache;
 
 }; /* class CStereoOVR */
 

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

@@ -146,7 +146,7 @@ public:
 	OVR::HMDInfo HMDInfo;
 };
 
-CStereoOVR::CStereoOVR(const CStereoDeviceInfo &deviceInfo) : m_Stage(0)
+CStereoOVR::CStereoOVR(const CStereoDeviceInfo &deviceInfo) : m_Stage(0), m_OrientationCached(false)
 {
 	++s_DeviceCounter;
 	m_DevicePtr = new CStereoOVRDevicePtr();
@@ -270,6 +270,7 @@ bool CStereoOVR::nextPass()
 	case 6:
 		m_Stage = 0;
 		// present
+		m_OrientationCached = false;
 		return false;
 	}
 }
@@ -280,6 +281,12 @@ const NL3D::CViewport &CStereoOVR::getCurrentViewport() const
 	else return m_RightViewport;
 }
 
+const NL3D::CFrustum &CStereoOVR::getCurrentFrustum() const
+{
+	if (m_Stage % 2) return m_LeftFrustum;
+	else return m_RightFrustum;
+}
+
 void CStereoOVR::getCurrentFrustum(NL3D::UCamera *camera) const
 {
 	if (m_Stage % 2) camera->setFrustum(m_LeftFrustum);
@@ -360,6 +367,9 @@ void CStereoOVR::endInterface2D()
 
 NLMISC::CQuat CStereoOVR::getOrientation() const
 {
+	if (m_OrientationCached)
+		return m_OrientationCache;
+
 	OVR::Quatf quatovr = m_DevicePtr->SensorFusion.GetPredictedOrientation();
 	NLMISC::CMatrix coordsys;
 	float csys[] = {
@@ -374,7 +384,24 @@ NLMISC::CQuat CStereoOVR::getOrientation() const
 	NLMISC::CMatrix matr;
 	matr.rotateX(NLMISC::Pi * 0.5f); // fix this properly... :) (note: removing this allows you to use rift while lying down)
 	NLMISC::CMatrix matnel = matr * matovr * coordsys;
-	return matnel.getRot();
+	NLMISC::CQuat finalquat = matnel.getRot();
+	m_OrientationCache = finalquat;
+	m_OrientationCached = true;
+	return finalquat;
+}
+
+/// Get GUI shift (todo: move to CStereoHMD)
+void CStereoOVR::getInterface2DShift(float &x, float &y, float distance)
+{
+	NLMISC::CVector vector = CVector(0.f, -distance, 0.f);
+	NLMISC::CQuat rot = getOrientation();
+	rot.invert();
+	NLMISC::CMatrix mat;
+	mat.rotate(rot);
+	mat.translate(vector);
+	CVector proj = getCurrentFrustum().project(mat.getPos());
+	x = proj.x - 0.5f;
+	y = proj.y - 0.5f;
 }
 
 void CStereoOVR::listDevices(std::vector<CStereoDeviceInfo> &devicesOut)

code/snowballs2/client/src/camera.h

@@ -42,7 +42,6 @@ namespace SBCLIENT {
 extern NL3D::UCamera				Camera;
 extern NL3D::UCamera						SkyCamera;
 extern NL3D::UVisualCollisionEntity	*CamCollisionEntity;
-extern NL3D::CStereoOVR *StereoHMD;
 extern NL3D::UScene				*SkyScene;
 
 //

code/snowballs2/client/src/commands.cpp

@@ -35,6 +35,7 @@
 #include <nel/3d/u_3d_mouse_listener.h>
 #include <nel/3d/u_material.h>
 #include <nel/3d/u_landscape.h>
+#include <nel/3d/stereo_ovr.h>
 
 #include "network.h"
 #include "snowballs_client.h"
@@ -374,6 +375,9 @@ void	updateCommands()
 	uint32 _width, _height;
 	Driver->getWindowSize(_width, _height);
 	float width = (float)_width, height = (float)_height;
+	NL3D::CViewport vp = Driver->getViewport();
+	width *= vp.getWidth();
+	height *= vp.getHeight();
 	float CommandsLineHeight = CommandsFontSize / height;
 	float CommandsBoxX = ((float)(sint32)(SBCLIENT::CommandsBoxX * width)) / width;
 	float CommandsBoxWidth = ((float)(sint32)(SBCLIENT::CommandsBoxWidth * width)) / width;
@@ -381,6 +385,17 @@ void	updateCommands()
 	float CommandsBoxHeight = ((float)(sint32)((CommandsNbLines + 1) * CommandsLineHeight * width)) / width;
 	float CommandsBoxBorderX = ((float)(sint32)(SBCLIENT::CommandsBoxBorder * width)) / width;
 	float CommandsBoxBorderY = ((float)(sint32)(SBCLIENT::CommandsBoxBorder * height)) / height;
+	if (StereoHMD)
+	{
+		float xshift, yshift;
+		StereoHMD->getInterface2DShift(xshift, yshift, 1.0f);
+		// snap to pixels
+		xshift = ((float)(sint32)(xshift * width)) / width;
+		yshift = ((float)(sint32)(yshift * height)) / height;
+		// adjust
+		CommandsBoxX += xshift;
+		CommandsBoxY += yshift;
+	}
 
 	// Display the background
 	Driver->setMatrixMode2D11 ();

code/snowballs2/client/src/snowballs_client.h

@@ -42,6 +42,7 @@ namespace NL3D {
 	class UScene;
 	class UTextContext;
 	class ULandscape;
+	class CStereoOVR;
 }
 
 namespace SBCLIENT {
@@ -58,6 +59,7 @@ public:
 };
 
 extern NL3D::UDriver *Driver;
+extern NL3D::CStereoOVR *StereoHMD;
 extern NL3D::UScene *Scene;
 extern NL3D::UTextContext *TextContext;
 extern NLMISC::CConfigFile *ConfigFile;