Projection matrix is now generated and managed by Nel and only loaded into OpenGL when dirty.

--HG--
branch : gsoc2013-dfighter

code/nel/include/nel/misc/matrix.h

@@ -163,6 +163,10 @@ public:
 	 *	\param i : column index.
 	 *	\param j : line index.
 	 */
+
+	void		setFlags();
+
+
 	void		setCoefficient(float coeff, sint i, sint j)
 	{
 		M[ (j<<2) + i] = coeff;
@@ -357,6 +361,9 @@ public:
 	/// Plane (line vector) multiplication.
 	friend CPlane		operator*(const CPlane &p, const CMatrix &m);
 
+	void frustum(float left, float right, float bottom, float top, float znear, float zfar );
+
+	void ortho(float left, float right, float bottom, float top, float znear, float zfar );
 
 private:
 	float	M[16];

code/nel/src/3d/driver/OpenGL3/driver_opengl.cpp

@@ -275,6 +275,12 @@ CDriverGL3::CDriverGL3()
 #endif
 	}
 
+	for( i = 0; i < IDRV_MAT_MAXTEXTURES; i++ )
+		_UserTexMatDirty[ i ] = false;
+
+	for( i = 0; i < IDRV_MAT_MAXTEXTURES; i++ )
+		_UserTexMat[ i ].identity();
+
 	_UserTexMatEnabled = 0;
 
 	// Ligtmap preca.
@@ -1447,18 +1453,6 @@ uint			CDriverGL3::getNbTextureStages() const
 	return inlGetNumTextStages();
 }
 
-// ***************************************************************************
-void CDriverGL3::refreshProjMatrixFromGL()
-{
-	H_AUTO_OGL(CDriverGL3_refreshProjMatrixFromGL)
-
-	if (!_ProjMatDirty) return;
-	float mat[16];
-	glGetFloatv(GL_PROJECTION_MATRIX, mat);
-	_GLProjMat.set(mat);
-	_ProjMatDirty = false;
-}
-
 // ***************************************************************************
 bool CDriverGL3::supportEMBM() const
 {

code/nel/src/3d/driver/OpenGL3/driver_opengl.h

@@ -1001,9 +1001,6 @@ private:
 	// reset the cursor shape to the system arrow
 	void					setSystemArrow();
 
-	// Get the proj matrix setupped in GL
-	void					refreshProjMatrixFromGL();
-
 	bool					setupVertexBuffer(CVertexBuffer& VB);
 	// Activate Texture Environnement. Do it with caching.
 	bool					activateTexture(uint stage, ITexture *tex);
@@ -1330,8 +1327,8 @@ private:
 
 	// user texture matrix
 	NLMISC::CMatrix		_UserTexMat[IDRV_MAT_MAXTEXTURES];
+	bool _UserTexMatDirty[IDRV_MAT_MAXTEXTURES];
 	uint				_UserTexMatEnabled; // bitm ask for user texture coords
-	//NLMISC::CMatrix		_UserTexMat[IDRV_MAT_MAXTEXTURES];
 
 	// Static const
 	static const uint NumCoordinatesType[CVertexBuffer::NumType];

code/nel/src/3d/driver/OpenGL3/driver_opengl_matrix.cpp

@@ -28,20 +28,14 @@ void CDriverGL3::setFrustum(float left, float right, float bottom, float top, fl
 {
 	H_AUTO_OGL(CDriverGL3_setFrustum);
 
-	glMatrixMode(GL_PROJECTION);
-	glLoadIdentity();
-
-	if (perspective)
-		glFrustum(left,right,bottom,top,znear,zfar);
+	if( perspective )
+		_GLProjMat.frustum( left, right, bottom, top, znear, zfar );
 	else
-		glOrtho(left,right,bottom,top,znear,zfar);
+		_GLProjMat.ortho( left, right, bottom, top, znear, zfar );
 
 	_ProjMatDirty = true;
+	_OODeltaZ = 1 / ( zfar - znear );
 
-	// Backup znear and zfar for zbias setup
-	_OODeltaZ = 1 / (zfar - znear);
-
-	glMatrixMode(GL_MODELVIEW);
 }
 
 // ***************************************************************************
@@ -49,11 +43,10 @@ void CDriverGL3::setFrustum(float left, float right, float bottom, float top, fl
 void CDriverGL3::setFrustumMatrix(CMatrix &frustumMatrix)
 {
 	H_AUTO_OGL(CDriverGL3_setFrustum)
-	glMatrixMode(GL_PROJECTION);
 
-	glLoadMatrixf(((GLfloat*)frustumMatrix.get()));
+	_GLProjMat = frustumMatrix;
+	_ProjMatDirty = true;
 
-	glMatrixMode(GL_MODELVIEW);
 }
 
 // ***************************************************************************
@@ -62,16 +55,7 @@ CMatrix CDriverGL3::getFrustumMatrix()
 {
 	H_AUTO_OGL(CDriverGL3_getFrustum)
 
-	glMatrixMode(GL_PROJECTION);
-
-	CMatrix frustumMatrix;
-	float frustum[16];
-	glGetFloatv(GL_PROJECTION_MATRIX, ((GLfloat*)&frustum));
-	frustumMatrix.set(frustum);
-
-	glMatrixMode(GL_MODELVIEW);
-
-	return frustumMatrix;
+	return _GLProjMat;
 }
 
 // ***************************************************************************
@@ -180,6 +164,14 @@ void CDriverGL3::doRefreshRenderSetup()
 	// Check light setup is good
 	nlassert (_LightSetupDirty==false);
 
+	if( _ProjMatDirty )
+	{
+		glMatrixMode( GL_PROJECTION );
+		glLoadMatrixf( _GLProjMat.get() );
+		glMatrixMode( GL_MODELVIEW );
+		_ProjMatDirty = false;
+	}
+
 
 	// Check if must update the modelViewMatrix
 	if( _ModelViewMatrixDirty )

code/nel/src/3d/driver/OpenGL3/driver_opengl_vertex_program.cpp

@@ -1828,12 +1828,10 @@ void CDriverGL3::setConstantMatrix (uint index, IDriver::TMatrix matrix, IDriver
 			break;
 			case IDriver::Projection:
 				{
-					refreshProjMatrixFromGL();
 					mat = _GLProjMat;
 				}
 			break;
 			case IDriver::ModelViewProjection:
-				refreshProjMatrixFromGL();
 				mat = _GLProjMat * _ModelViewMatrix;
 			break;
             default:

code/nel/src/misc/matrix.cpp

@@ -313,11 +313,15 @@ void		CMatrix::resetProj()
 // ======================================================================================================
 void		CMatrix::set(const float m44[16])
 {
-	StateBit= MAT_IDENTITY;
-
-	StateBit|= MAT_ROT | MAT_SCALEANY;
 	memcpy(M, m44, 16*sizeof(float));
 	Scale33= 1.0f;
+	setFlags();
+}
+
+void CMatrix::setFlags()
+{
+	StateBit= MAT_IDENTITY;
+	StateBit|= MAT_ROT | MAT_SCALEANY;
 
 	// Check Trans state.
 	if(a14!=0 || a24!=0 || a34!=0)
@@ -1561,8 +1565,61 @@ void		CMatrix::setArbitraryRotK(const CVector &kdir)
 	normalize(CMatrix::ZYX);
 }
 
+void CMatrix::frustum(float left, float right, float bottom, float top, float znear, float zfar )
+{
+	// http://www.opengl.org/sdk/docs/man2/xhtml/glFrustum.xml
+
+	a11 = 2.0f * znear / ( right - left );
+	a12 = 0.0f;
+	a13 = ( right + left ) / ( right - left );
+	a14 = 0.0f;
+
+	a21 = 0.0f;
+	a22 = 2.0f * znear / ( top - bottom );
+	a23 = ( top + bottom ) / ( top - bottom );
+	a24 = 0.0f;
+
+	a31 = 0.0f;
+	a32 = 0.0f;
+	a33 = -1.0f * ( zfar + znear ) / ( zfar - znear );
+	a34 = -1.0f * 2.0f * zfar * znear / ( zfar - znear );
+
+	a41 = 0.0f;
+	a42 = 0.0f;
+	a43 = -1.0f;
+	a44 = 0.0f;
+
+	Scale33 = 1.0f;
+	setFlags();
+}
 
-
+void CMatrix::ortho(float left, float right, float bottom, float top, float znear, float zfar )
+{
+	// http://www.opengl.org/sdk/docs/man2/xhtml/glOrtho.xml
+
+	a11 = 2.0f / ( right - left );
+	a12 = 0.0f;
+	a13 = 0.0f;
+	a14 = -1.0f * ( right + left ) / ( right - left );
+
+	a21 = 0.0f;
+	a22 = 2.0f / ( top - bottom );
+	a23 = 0.0f;
+	a24 = -1.0f * ( top + bottom ) / ( top - bottom );
+
+	a31 = 0.0f;
+	a32 = 0.0f;
+	a33 = -2.0f / ( zfar - znear );
+	a34 = -1.0f * ( zfar + znear ) / ( zfar - znear );
+
+	a41 = 0.0f;
+	a42 = 0.0f;
+	a43 = 0.0f;
+	a44 = 1.0f;
+
+	Scale33 = 1.0f;
+	setFlags();
+}
 
 }