rendering modification for support of VRJuggler (use multi context option)

CMakeLists.txt

@@ -19,6 +19,8 @@ SET ( WITH_NUMERICAL ON CACHE BOOL "build CGoGN with Numerical libs support ")
 SET ( FORCE_MR "0" CACHE STRING "0: normal mode / 1 multires mode")
 #create one big lib
 SET ( ONELIB OFF CACHE BOOL "build CGoGN in one lib")
+SET ( WITH_GLEWMX OFF CACHE BOOL "use multi-contex GLEW")
+
 
 IF(WIN32)
 	set(CMAKE_PREFIX_PATH ${CGoGN_ROOT_DIR}/windows_dependencies CACHE STRING "path to dependencies")
@@ -54,6 +56,15 @@ ELSE (ONELIB)
 	file(WRITE ${CGoGN_ROOT_DIR}/include/cgogn_onelib.h "0" )
 ENDIF (ONELIB)
 
+
+IF (WITH_GLEWMX)
+	file(WRITE ${CGoGN_ROOT_DIR}/include/cgogn_gmx.h "1" )
+ELSE (WITH_GLEWMX)
+	file(WRITE ${CGoGN_ROOT_DIR}/include/cgogn_gmx.h "0" )
+ENDIF (WITH_GLEWMX)
+
+
+
 add_definitions(-DSHADERPATH="${CGoGN_ROOT_DIR}/lib/Shaders/")
 
 # define includes of external libs 
@@ -100,6 +111,10 @@ IF (WITH_QT)
 	SET (CGoGN_EXT_LIBS ${CGoGN_EXT_LIBS} ${QT_LIBRARIES} )
 ENDIF (WITH_QT)
 
+IF (WITH_GLEWMX)
+	ADD_DEFINITIONS(-DGLEW_MX)
+ENDIF (WITH_GLEWMX)
+
 #IF (WITH_NUMERICAL)
 #	add_definitions(-DWITH_NUMERICAL)
 #	SET (CGoGN_NUMERICAL_INCLUDES  ${CGoGN_ROOT_DIR}/ThirdParty/Numerical ${CGoGN_ROOT_DIR}/ThirdParty/Numerical/UFconfig)

Release/CMakeLists.txt

@@ -8,7 +8,7 @@ IF(WIN32)
 	SET(LIBRARY_OUTPUT_PATH ${CGoGN_ROOT_DIR}/lib)
 ELSE(WIN32)
 	SET(LIBRARY_OUTPUT_PATH ${CGoGN_ROOT_DIR}/lib/Release)
-	SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNOTOPOWARNING")
+	ADD_DEFINITIONS(-DNOTOPOWARNING)
 ENDIF(WIN32)
 
 include_directories(

include/Utils/GLSLShader.h

@@ -29,6 +29,7 @@
 #ifndef __CGoGN_GLSL_SHADER__
 #define __CGoGN_GLSL_SHADER__
 
+#include "Utils/gl_def.h"
 #include "Utils/os_spec.h"
 #include "Utils/vbo.h"
 #include "Utils/gl_matrices.h"
@@ -41,6 +42,7 @@
 #include <vector>
 #include <set>
 
+
 namespace CGoGN
 {
 
@@ -80,17 +82,17 @@ protected:
 	/**
 	 * handle of vertex shader
 	 */
-	GLhandleARB	m_vertex_shader_object;
+	CGoGNGLhandleARB	m_vertex_shader_object;
 
 	/**
 	 * handle of fragment shader
 	 */
-	GLhandleARB	m_fragment_shader_object;
+	CGoGNGLhandleARB	m_fragment_shader_object;
 
 	/**
 	 * handle of geometry shader
 	 */
-	GLhandleARB	m_geom_shader_object;
+	CGoGNGLhandleARB	m_geom_shader_object;
 
 	std::string m_nameVS;
 	std::string m_nameFS;
@@ -99,12 +101,12 @@ protected:
 	/**
 	 * handle of program
 	 */
-	GLhandleARB m_program_object;
+	CGoGNGLhandleARB m_program_object;
 
-	GLint m_uniMat_Proj;
-	GLint m_uniMat_Model;
-	GLint m_uniMat_ModelProj;
-	GLint m_uniMat_Normal;
+	CGoGNGLint m_uniMat_Proj;
+	CGoGNGLint m_uniMat_Model;
+	CGoGNGLint m_uniMat_ModelProj;
+	CGoGNGLint m_uniMat_Normal;
 
 	char* m_vertex_shader_source;
 	char* m_fragment_shader_source;
@@ -296,7 +298,7 @@ public:
 	/**
 	 * get handler of program for external use og gl functions
 	 */
-	GLuint program_handler() { return m_program_object;}
+	GLhandleARB program_handler() { return *m_program_object;}
 
 	/**
 	 * check shader validity width official GLSL syntax
@@ -379,6 +381,9 @@ public:
 	 */
 	void disableVertexAttribs() const;
 
+	/// get back OpenGL standard matrices & send to all shaders
+	static void updateAllFromGLMatrices();
+
 	/// sent current matrices to all shaders
 	static void updateCurrentMatrices();
 	/// get current transformation matrix
@@ -400,13 +405,13 @@ public:
 
 inline bool GLSLShader::isCreated()
 {
-	return ( m_program_object != 0 );
+	return ( *m_program_object != 0 );
 }
 
 template<unsigned int NB>
 void GLSLShader::setuniformf( const char* name, const float* val)
 {
-	GLint uni = glGetUniformLocationARB(m_program_object,name);
+	GLint uni = glGetUniformLocationARB(*m_program_object,name);
 	if (uni >= 0)
 	{
 		switch(NB)
@@ -433,7 +438,7 @@ void GLSLShader::setuniformf( const char* name, const float* val)
 template<unsigned int NB>
 void GLSLShader::setuniformi( const char* name, const int* val)
 {
-	GLint uni = glGetUniformLocationARB(m_program_object,name);
+	GLint uni = glGetUniformLocationARB(*m_program_object,name);
 	if (uni>=0)
 	{
 		switch(NB)

include/Utils/Shaders/shaderExplodeVolumes.h

@@ -43,12 +43,12 @@ protected:
     static std::string geometryShaderText;
 
     // uniform locations
-	GLuint m_unif_ambiant;
-	GLuint m_unif_backColor;
-	GLuint m_unif_lightPos;
-	GLuint m_unif_explodeV;
-	GLuint m_unif_explodeF;
-	GLuint m_unif_plane;
+	CGoGNGLuint m_unif_ambiant;
+	CGoGNGLuint m_unif_backColor;
+	CGoGNGLuint m_unif_lightPos;
+	CGoGNGLuint m_unif_explodeV;
+	CGoGNGLuint m_unif_explodeF;
+	CGoGNGLuint m_unif_plane;
 
 //	local storage for uniforms
 	float m_explodeV;

include/Utils/Shaders/shaderExplodeVolumesLines.h

@@ -43,9 +43,9 @@ protected:
     static std::string geometryShaderText;
 
     // uniform locations
-	GLuint m_unif_color;
-	GLuint m_unif_explodeV;
-	GLuint m_unif_plane;
+	CGoGNGLuint m_unif_color;
+	CGoGNGLuint m_unif_explodeV;
+	CGoGNGLuint m_unif_plane;
 
 	float m_explodeV;
 	Geom::Vec4f m_color;

include/Utils/Shaders/shaderFlat.h

@@ -43,10 +43,10 @@ protected:
     static std::string geometryShaderText;
 
     // uniform locations
-	GLuint m_unif_ambiant;
-	GLuint m_unif_diffuse;
-	GLuint m_unif_lightPos;
-	GLuint m_unif_explode;
+	CGoGNGLuint m_unif_ambiant;
+	CGoGNGLuint m_unif_diffuse;
+	CGoGNGLuint m_unif_lightPos;
+	CGoGNGLuint m_unif_explode;
 
 	float m_explode;
 	Geom::Vec4f m_ambiant;

include/Utils/Shaders/shaderFlatColor.h

@@ -43,9 +43,9 @@ protected:
     static std::string geometryShaderText;
 
     // uniform locations
-	GLuint m_unif_ambiant;
-	GLuint m_unif_lightPos;
-	GLuint m_unif_explode;
+	CGoGNGLuint m_unif_ambiant;
+	CGoGNGLuint m_unif_lightPos;
+	CGoGNGLuint m_unif_explode;
 
 	float m_explode;
 	Geom::Vec4f m_ambiant;

include/Utils/Shaders/shaderPhong.h

@@ -48,11 +48,11 @@ protected:
     static std::string fragmentShaderText;
 
     // uniform locations
-	GLuint m_unif_ambiant;
-	GLuint m_unif_diffuse;
-	GLuint m_unif_specular;
-	GLuint m_unif_shininess;
-	GLuint m_unif_lightPos;
+	CGoGNGLuint m_unif_ambiant;
+	CGoGNGLuint m_unif_diffuse;
+	CGoGNGLuint m_unif_specular;
+	CGoGNGLuint m_unif_shininess;
+	CGoGNGLuint m_unif_lightPos;
 
 	//values
 	Geom::Vec4f m_ambiant;

include/Utils/Shaders/shaderSimpleColor.h

@@ -43,7 +43,7 @@ protected:
 	static std::string fragmentShaderText;
 
 	// uniform locations
-	GLuint m_unif_color;
+	CGoGNGLuint m_unif_color;
 
 	Geom::Vec4f m_color;
 

include/Utils/Shaders/shaderSimpleTexture.h

@@ -44,7 +44,7 @@ protected:
 	static std::string vertexShaderText;
 	static std::string fragmentShaderText;
 
-	GLuint m_unif_unit;
+	CGoGNGLuint m_unif_unit;
 	int m_unit;
 
 

include/Utils/Shaders/shaderTextureMask.h

@@ -44,9 +44,9 @@ protected:
 	static std::string vertexShaderText;
 	static std::string fragmentShaderText;
 
-	GLuint m_unif_unit;
+	CGoGNGLuint m_unif_unit;
 	int m_unit;
-	GLuint m_unif_unitMask;
+	CGoGNGLuint m_unif_unitMask;
 	int m_unitMask;
 
 	Utils::GTexture* m_tex_ptr;

include/Utils/Shaders/shaderVectorPerVertex.h

@@ -42,8 +42,8 @@ protected:
     static std::string geometryShaderText;
     static std::string fragmentShaderText;
 
-    GLuint m_uniform_scale;
-    GLuint m_uniform_color;
+    CGoGNGLuint m_uniform_scale;
+    CGoGNGLuint m_uniform_color;
 
 	float m_scale;
 	Geom::Vec4f m_color;

include/Utils/gl_def.h

+/*******************************************************************************
+* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
+* version 0.1                                                                  *
+* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
+*                                                                              *
+* This library is free software; you can redistribute it and/or modify it      *
+* under the terms of the GNU Lesser General Public License as published by the *
+* Free Software Foundation; either version 2.1 of the License, or (at your     *
+* option) any later version.                                                   *
+*                                                                              *
+* This library 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 Lesser General Public License  *
+* for more details.                                                            *
+*                                                                              *
+* You should have received a copy of the GNU Lesser General Public License     *
+* along with this library; if not, write to the Free Software Foundation,      *
+* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
+*                                                                              *
+* Web site: http://cgogn.unistra.fr/                                           *
+* Contact information: cgogn@unistra.fr                                        *
+*                                                                              *
+*******************************************************************************/
+
+#ifndef __CGOGN_GL_DEF_H_
+#define __CGOGN_GL_DEF_H_
+
+#ifdef USE_VRJUGGLER
+#include <vrj/Draw/OGL/GlApp.h>
+#include <vrj/Draw/OGL/GlContextData.h>
+#endif
+
+#include <GL/glew.h>
+
+namespace CGoGN
+{
+
+#ifdef USE_VRJUGGLER
+
+#include <vrj/Draw/OGL/GlApp.h>
+#include <vrj/Draw/OGL/GlContextData.h>
+typedef vrj::opengl::ContextData<GLint> CGoGNGLint;
+typedef vrj::opengl::ContextData<GLuint> CGoGNGLuint;
+typedef vrj::opengl::ContextData<GLhandleARB> CGoGNGLhandleARB;
+
+#else
+
+template <typename T>
+class FalsePtr
+{
+        T m_v;
+public:
+        FalsePtr() :m_v(T(0)) {}
+        FalsePtr(const T& v) : m_v(v) {}
+        T& operator*() { return m_v; }
+        const T& operator*() const { return m_v; }
+};
+
+typedef FalsePtr<GLint> CGoGNGLint;
+typedef FalsePtr<GLuint> CGoGNGLuint;
+typedef FalsePtr<GLhandleARB> CGoGNGLhandleARB;
+
+#endif
+
+}
+
+
+#endif /* GL_DEF_H_ */

include/Utils/pickables.h

@@ -44,7 +44,7 @@ protected:
 	/**
 	 * id of indices VBO
 	 */
-	GLuint m_ind;
+	CGoGNGLuint m_ind;
 
 	/**
 	 * VBO for position

include/Utils/pointSprite.h

@@ -47,18 +47,20 @@ protected:
 
 	static std::string fragmentShaderText;
 
-	static GLuint m_idTexture;
-
-	static GLuint m_uniform_texture;
-
 	static unsigned char* m_ptrSphere;
 
+	static PointSprite* m_instance0;
+
 	// compute the sphere instead of storing it in image file.
 	static void computeSphere();
 
-	GLuint m_uniform_size;
+	CGoGNGLuint m_uniform_size;
+
+	CGoGNGLuint m_uniform_color;
+
+	CGoGNGLuint m_idTexture;
 
-	GLuint m_uniform_color;
+	CGoGNGLuint m_uniform_texture;
 
 public:
 	/**

include/Utils/text3d.h

@@ -55,7 +55,7 @@ protected:
     static std::string fragmentShaderText1;
     static std::string fragmentShaderText2;
 
-    static GLuint m_idTexture;
+    static Strings3D*  m_instance0;
 
 	std::vector<std::string> m_strings;
 
@@ -71,13 +71,15 @@ protected:
 
     unsigned int sendOneStringToVBO(const std::string& str, float **buffer);
 
-    GLuint m_uniform_texture;
+    CGoGNGLuint m_idTexture;
 
-    GLuint m_uniform_scale;
+    CGoGNGLuint m_uniform_texture;
 
-    GLuint m_uniform_position;
+    CGoGNGLuint m_uniform_scale;
 
-    GLuint m_uniform_color;
+    CGoGNGLuint m_uniform_position;
+
+    CGoGNGLuint m_uniform_color;
 
 public:
 	Strings3D(bool withBackground = true, const Geom::Vec3f& bgc = Geom::Vec3f(0));

include/Utils/textures.h

@@ -25,6 +25,7 @@
 #ifndef CGOGN_TEXTURES_H_
 #define CGOGN_TEXTURES_H_
 
+#include "Utils/gl_def.h"
 #include "Geometry/vector_gen.h"
 #include <GL/glew.h>
 #include <string>
@@ -309,7 +310,7 @@ protected:
 	/**
 	* texture id
 	*/
-	GLuint m_id;
+	CGoGNGLuint m_id;
 	
 	/**
 	 * dimension of texture

include/Utils/textures.hpp

@@ -915,9 +915,9 @@ m_type(type)
 		break;
 	}
 
-	glGenTextures(1, &m_id);
+	glGenTextures(1, &(*m_id));
 
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 	glTexParameteri(m_target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 	glTexParameteri(m_target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
@@ -963,7 +963,7 @@ GLenum Texture<DIM,TYPE>::internalFormat()
 template < unsigned int DIM, typename TYPE >
 void Texture<DIM,TYPE>::bind()
 {
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 }
 
 
@@ -983,7 +983,7 @@ void Texture<DIM,TYPE>::checkAlignment()
 template < unsigned int DIM, typename TYPE >
 void Texture<DIM,TYPE>::update()
 {
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 	checkAlignment();
 	switch(DIM)
 	{
@@ -1005,7 +1005,7 @@ void Texture<DIM,TYPE>::update()
 template < unsigned int DIM, typename TYPE >
 void Texture<DIM,TYPE>::update(const COORD& origin, const COORD& sz)
 {
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 	checkAlignment();
 	switch(DIM)
 	{
@@ -1028,7 +1028,7 @@ void Texture<DIM,TYPE>::update(const COORD& origin, const COORD& sz)
 template < unsigned int DIM, typename TYPE >
 void Texture<DIM,TYPE>::setFiltering(GLint param)
 {
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 	glTexParameteri(m_target, GL_TEXTURE_MIN_FILTER, param);
 	glTexParameteri(m_target, GL_TEXTURE_MAG_FILTER, param);
 }
@@ -1038,7 +1038,7 @@ void Texture<DIM,TYPE>::setFiltering(GLint param)
 template < unsigned int DIM, typename TYPE >
 void Texture<DIM,TYPE>::setWrapping(GLint param)
 {
-	glBindTexture(m_target, m_id);
+	glBindTexture(m_target, *m_id);
 	glTexParameteri(m_target, GL_TEXTURE_WRAP_S, param);
 	glTexParameteri(m_target, GL_TEXTURE_WRAP_T, param);
 	glTexParameteri(m_target, GL_TEXTURE_WRAP_R, param);

include/Utils/vbo.h

@@ -25,9 +25,10 @@
 #ifndef __CGoGN_GLSL_VBO__
 #define __CGoGN_GLSL_VBO__
 
+
 #include <vector>
 #include <GL/glew.h>
-
+#include "Utils/gl_def.h"
 #include "Topology/generic/attributeHandler.h"
 #include "Container/convert.h"
 
@@ -50,7 +51,7 @@ class VBO
 {
 protected:
 	// VBO id
-	GLuint m_id;
+	CGoGNGLuint m_id;
 	// size of data (in floats)
 	unsigned int m_data_size;
 	// shaders that ref this vbo
@@ -77,7 +78,7 @@ public:
 	/**
 	 * get id of vbo
 	 */
-	unsigned int id() const { return m_id; }
+	GLuint id() const { return *m_id; }
 
 	/**
 	 * get dataSize
@@ -97,7 +98,7 @@ public:
 	/**
 	 * bind array vbo
 	 */
-	void bind() const  { glBindBuffer(GL_ARRAY_BUFFER, m_id); }
+	void bind() const  { glBindBuffer(GL_ARRAY_BUFFER, *m_id); }
 
 	/**
 	 * alloc buffer of same size than parameter

include/Utils/vbo.hpp

@@ -43,7 +43,7 @@ void VBO::updateData(const ATTR_HANDLER& attrib)
 	unsigned int byteTableSize;
 	unsigned int nbb = mv->getBlocksPointers(addr, byteTableSize);
 
-	glBindBuffer(GL_ARRAY_BUFFER, m_id);
+	glBindBuffer(GL_ARRAY_BUFFER, *m_id);
 	glBufferData(GL_ARRAY_BUFFER, nbb * byteTableSize, 0, GL_STREAM_DRAW);
 
 	m_nbElts = nbb * byteTableSize / sizeof(typename ATTR_HANDLER::DATA_TYPE);
@@ -76,7 +76,7 @@ void VBO::updateData(const ATTR_HANDLER& attrib, ConvertAttrib* conv)
 	conv->reserve(mv->getBlockSize());
 
 	// bind buffer to update
-	glBindBuffer(GL_ARRAY_BUFFER, m_id);
+	glBindBuffer(GL_ARRAY_BUFFER, *m_id);
 	glBufferData(GL_ARRAY_BUFFER, nbb * conv->sizeBuffer(), 0, GL_STREAM_DRAW);
 
 	m_nbElts = nbb * conv->nbElt();
@@ -108,7 +108,7 @@ void VBO::updateData(std::vector<T>& data)
 	m_data_size = sizeof(T) / sizeof(float);
 	m_nbElts = data.size();
 
-	glBindBuffer(GL_ARRAY_BUFFER, m_id);
+	glBindBuffer(GL_ARRAY_BUFFER, *m_id);
 	glBufferData(GL_ARRAY_BUFFER, m_nbElts * sizeof(T), &(data[0]), GL_STREAM_DRAW);
 }
 

src/Algo/Render/mapRender.cpp

@@ -39,14 +39,14 @@ namespace GL2
 
 MapRender::MapRender()
 {
-	glGenBuffersARB(SIZE_BUFFER, m_indexBuffers) ;
+	glGenBuffers(SIZE_BUFFER, m_indexBuffers) ;
 	for(unsigned int i = 0; i < SIZE_BUFFER; ++i)
 		m_nbIndices[i] = 0 ;
 }
 
 MapRender::~MapRender()
 {
-	glDeleteBuffersARB(4, m_indexBuffers);
+	glDeleteBuffers(4, m_indexBuffers);
 }
 
 void MapRender::initPrimitives(int prim, std::vector<GLuint>& tableIndices)
@@ -83,8 +83,8 @@ void MapRender::initPrimitives(int prim, std::vector<GLuint>& tableIndices)
 	}
 
 	// setup du buffer d'indices
-	glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, vbo_ind);
-	glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER, size * sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
+	glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vbo_ind);
+	glBufferData(GL_ELEMENT_ARRAY_BUFFER, size * sizeof(GLuint), &(tableIndices[0]), GL_STREAM_DRAW);
 }
 
 void MapRender::draw(Utils::GLSLShader* sh, int prim)

src/Utils/GLSLShader.cpp

@@ -71,18 +71,19 @@ std::set< std::pair<void*, GLSLShader*> > GLSLShader::m_registeredShaders;
 Utils::GL_Matrices* GLSLShader::s_current_matrices=NULL;
 
 GLSLShader::GLSLShader() :
-	m_vertex_shader_object(0),
-	m_fragment_shader_object(0),
-	m_geom_shader_object(0),
-	m_program_object(0),
-	m_uniMat_Proj(-1),
-	m_uniMat_Model(-1),
-	m_uniMat_ModelProj(-1),
-	m_uniMat_Normal(-1),
 	m_vertex_shader_source(NULL),
 	m_fragment_shader_source(NULL),
 	m_geom_shader_source(NULL)
 {
+	*m_vertex_shader_object = 0;
+	*m_fragment_shader_object = 0;
+	*m_geom_shader_object = 0;
+	*m_program_object = 0;
+	*m_uniMat_Proj = -1;
+	*m_uniMat_Model = -1;
+	*m_uniMat_ModelProj = -1;
+	*m_uniMat_Normal = -1;
+
 	if (DEFINES_GL == NULL)
 		DEFINES_GL = &DEFINES_GL2;
 }
@@ -275,16 +276,16 @@ bool GLSLShader::loadVertexShaderSourceString( const char *vertex_shader_source
 	int		status;
 	char	*info_log;
 
-	if (m_vertex_shader_object==0)
+	if (*m_vertex_shader_object==0)
 	{
-		glDeleteShader(m_vertex_shader_object);
-		m_vertex_shader_object=0;
+		glDeleteShader(*m_vertex_shader_object);
+		*m_vertex_shader_object=0;
 	}
 
 	/*** create shader object ***/
-	m_vertex_shader_object = glCreateShader( GL_VERTEX_SHADER );
+	*m_vertex_shader_object = glCreateShader( GL_VERTEX_SHADER );
 
-	if( !m_vertex_shader_object )
+	if( !*m_vertex_shader_object )
 	{
 		CGoGNerr << "ERROR - GLSLShader::loadVertexShader() - unable to create shader object." << CGoGNendl;
 		return false;
@@ -295,27 +296,27 @@ bool GLSLShader::loadVertexShaderSourceString( const char *vertex_shader_source
 	{
 		CGoGNerr << "ERROR - GLSLShader::loadVertexShader() - source string is empty." << CGoGNendl;