upage ogl3 divers

Apps/Tuto/tuto_mt.cpp

@@ -41,11 +41,13 @@
 
 #include "Algo/Parallel/parallel_foreach.h"
 
-#include "averaging.h"
 
 using namespace CGoGN ;
 
 
+
+
+
 /**
  * Struct that contains some informations about the types of the manipulated objects
  * Mainly here to be used by the algorithms that are parameterized by it

Apps/Tuto/tuto_ogl3.cpp

@@ -52,37 +52,38 @@ struct PFP: public PFP_STANDARD
 };
 
 
-
-const unsigned int GL_ATTRIB_POSITION=0;
-const unsigned int GL_ATTRIB_NORMAL=1;
-
-
 /**
  * A class for a little interface and rendering
  */
 class MyGlutWin: public Utils::SimpleGlutWinGL3
 {
 public:
-     void myRedraw();
-     void initGLAttribs();
-     void renderColor();
-     void renderPhong();
 
-     PFP::REAL gWidthObj;
-     PFP::VEC3 gPosObj;
+	void myRedraw();
+
+    void myKeyboard(unsigned char keycode, int x, int y);
+
+    void renderColor();
 
-     Algo::Render::GL3::MapRender* m_render;
+    void renderPhong();
 
-     Utils::GLSLShader* current_shader;
-     Utils::GLSLShader shaders[4];
+    void initPhongMaterial();
 
+    PFP::REAL gWidthObj;
+    PFP::VEC3 gPosObj;
 
+    Algo::Render::GL3::MapRender* m_render;
 
- 	MyGlutWin(int* argc, char **argv, int winX, int winY) : SimpleGlutWinGL3(argc, argv, winX, winY)
+    Utils::GLSLShader* current_shader;
+    Utils::GLSLShader shaders[4];
+
+    int rt;
+
+ 	MyGlutWin(int* argc, char **argv, int winX, int winY) : SimpleGlutWinGL3(argc, argv, winX, winY),rt(0)
     {
  		shaders[0].loadShaders("color_gl3.vert","color_gl3.frag");
  		shaders[1].loadShaders("phong_gl3.vert","phong_gl3.frag");
- 		current_shader = &shaders[1];
+ 		current_shader = &shaders[0];
  		setCurrentShader(current_shader);
     }
  	~MyGlutWin()
@@ -91,30 +92,38 @@ public:
  	}
 };
 
-void MyGlutWin::initGLAttribs()
+
+void MyGlutWin::initPhongMaterial()
 {
-	shaders[0].bindAttrib(GL_ATTRIB_POSITION, "VertexPosition");
+	float diffuse[] = {0.0f,1.0f,0.0f,0.0f};
+	float specular[] = {0.3f,0.3f,1.0f,0.0f};
+	float ambient[] = {0.1f,0.03f,0.03f,0.0f};
+	float shininess = 100.0f;
+	float lightPos[] = {100.0,300.0,1000.0f};
+
+	shaders[1].bind();
+
+	shaders[1].setuniformf<4>("materialDiffuse",diffuse);
+	shaders[1].setuniformf<4>("materialSpecular",specular);
+	shaders[1].setuniformf<4>("materialAmbient",ambient);
+	shaders[1].setuniformf<1>("shininess",&shininess);
+
+	shaders[1].setuniformf<3>("LightPosition",lightPos);
 
-	shaders[1].bindAttrib(GL_ATTRIB_POSITION, "VertexPosition");
-	shaders[1].bindAttrib(GL_ATTRIB_NORMAL, "VertexNormal");
 }
 
+
 void MyGlutWin::renderColor()
 {
-	current_shader = &shaders[0];
-
-//	setModelViewProjectionMatrix(current_shader);
-	setCurrentShader(current_shader);
 	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 	glDisable(GL_LIGHTING);
 
 	current_shader->bind();
 
-	float colorLine[] = {1.0f,1.0f,0.0f,0.0f};
-	float colorFace[] = {0.0f,1.0f,0.0f,0.0f};
 
 	// draw the lines
 	glLineWidth(2.0f);
+	float colorLine[] = {1.0f,1.0f,0.0f,0.0f};
 	current_shader->setuniformf<4>("Color",colorLine);
 	m_render->draw(Algo::Render::GL3::LINES);
 
@@ -122,6 +131,7 @@ void MyGlutWin::renderColor()
 	glEnable(GL_POLYGON_OFFSET_FILL);
 	glPolygonOffset(1.0f, 1.0f);
 
+	float colorFace[] = {0.1f,0.1f,0.3f,0.0f};
 	current_shader->setuniformf<4>("Color",colorFace);
 	m_render->draw(Algo::Render::GL3::TRIANGLES);
 
@@ -131,28 +141,12 @@ void MyGlutWin::renderColor()
 
 void MyGlutWin::renderPhong()
 {
-	current_shader = &shaders[1];
-	setCurrentShader(current_shader);
-//	setModelViewProjectionMatrix(current_shader);
-
-	float diffuse[] = {0.0f,1.0f,0.0f,0.0f};
-	float specular[] = {0.3f,0.3f,1.0f,0.0f};
-	float ambient[] = {0.1f,0.03f,0.03f,0.0f};
-	float shininess = 100.0f;
-	float lightPos[] = {100.0,300.0,1000.0f};
 
 	glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 	glEnable(GL_LIGHTING);
 
 	current_shader->bind();
 
-	current_shader->setuniformf<4>("materialDiffuse",diffuse);
-	current_shader->setuniformf<4>("materialSpecular",specular);
-	current_shader->setuniformf<4>("materialAmbient",ambient);
-	current_shader->setuniformf<1>("shininess",&shininess);
-
-	current_shader->setuniformf<3>("LightPosition",lightPos);
-
 	m_render->draw(Algo::Render::GL3::TRIANGLES);
 }
 
@@ -162,11 +156,43 @@ void MyGlutWin::myRedraw()
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 //	oglPushModelViewMatrix();
 
-	renderPhong();
+	switch(rt)
+	{
+	case 0:
+		renderColor();
+		break;
+	case 1:
+		renderPhong();
+		break;
+	}
 
 //	oglPopModelViewMatrix();
 }
 
+
+void MyGlutWin::myKeyboard(unsigned char keycode, int x, int y)
+{
+
+	switch(keycode)
+	{
+	case 'c':
+		rt=0;
+		current_shader = &shaders[0];
+		setCurrentShader(current_shader);
+		std::cout << "Color"<< std::endl;
+		break;
+	case 'p':
+		rt=1;
+		current_shader = &shaders[1];
+		setCurrentShader(current_shader);
+		std::cout << "Phong"<< std::endl;
+		break;
+	}
+	glutPostRedisplay();
+
+}
+
+
 int main(int argc, char **argv)
 {
 
@@ -187,6 +213,8 @@ int main(int argc, char **argv)
 
 	mgw.init();
 
+	glClearColor(0.1,0.1,0.3,0.0);
+
     // computation of the bounding box
     Geom::BoundingBox<PFP::VEC3> bb = Algo::Geometry::computeBoundingBox<PFP>(myMap, position);
     mgw.gWidthObj = std::max<PFP::REAL>(std::max<PFP::REAL>(bb.size(0), bb.size(1)), bb.size(2));
@@ -197,16 +225,23 @@ int main(int argc, char **argv)
     // instanciation of the renderer (here using VBOs)
     mgw.m_render = new Algo::Render::GL3::MapRender();
 
+
+	// declare names attributes of shaders
+    mgw.m_render->useVertexAttributeName("VertexPosition",mgw.shaders[0]);
+    mgw.m_render->useVertexAttributeName("VertexPosition",mgw.shaders[1]);
+    unsigned int attNormalId = mgw.m_render->useVertexAttributeName("VertexNormal",mgw.shaders[1]);
+
+    // send data to gc
+    mgw.m_render->updateData("VertexPosition", position);	// with name
+    mgw.m_render->updateData(attNormalId, normal);			//with Id
+
     // update the renderer (primitives and geometry)
 	SelectorTrue allDarts;
     mgw.m_render->initPrimitives<PFP>(myMap, allDarts,Algo::Render::GL3::TRIANGLES);
     mgw.m_render->initPrimitives<PFP>(myMap, allDarts,Algo::Render::GL3::LINES);
     mgw.m_render->initPrimitives<PFP>(myMap, allDarts,Algo::Render::GL3::POINTS);
 
-    mgw.m_render->updateData(GL_ATTRIB_POSITION, position);
-    mgw.m_render->updateData(GL_ATTRIB_NORMAL, normal);
-
-    mgw.initGLAttribs();
+    mgw.initPhongMaterial();
 
     mgw.mainLoop();
 

include/Algo/Render/gl3mapRender.h

@@ -35,6 +35,8 @@
 #include "Container/convert.h"
 #include "Geometry/vector_gen.h"
 
+#include "Utils/GLSLShader.h"
+
 namespace CGoGN
 {
 
@@ -83,6 +85,14 @@ protected:
 
 	unsigned int m_AttributesDataSize[NB_BUFFERS];
 
+	std::map<std::string,GLuint> m_attributebyName;
+
+
+	/**
+	 * number of vertex attributes
+	 */
+	GLuint m_nbVertexAttrib ;
+
 	/**
 	 * number of indices of triangles
 	 */
@@ -119,27 +129,59 @@ public:
 	 */
 	~MapRender() ;
 
+
+
+public:
 	/**
 	 * update the data
-	 * @param uptype that have to be updated: POSITIONS, NORMALS, COLORS, TEXCOORDS, ???
-	 * @param attribId attribute where data is stored
+	 * @param vertex_attrib vertex attrib id
+	 * @param attrib attribute where data is stored
 	 * @param conv Callback of attribute conversion (NULL if direct copy, default value)
 	 */
 	template <typename ATTR_HANDLER>
 	void updateData(unsigned int vertex_attrib, const ATTR_HANDLER& attrib, ConvertAttrib* conv = NULL) ;
 
+	/**
+	 * update the data
+	 * @param va_name vertex attrib name (in shader)
+	 * @param attrib attribute where data is stored
+	 * @param conv Callback of attribute conversion (NULL if direct copy, default value)
+	 */
+	template <typename ATTR_HANDLER>
+	void updateData(const std::string& name, const ATTR_HANDLER& attrib, ConvertAttrib* conv = NULL) ;
+
+
 	/**
 	 * enable a vertex attribute for rendering (updateDate automatically enable attrib)
 	 */
-	void enableVertexAttrib(unsigned int index);
+	void enableVertexAttrib(const std::string& name);
 
 	/**
 	 * disable a vertex attribute for rendering
 	 */
-	void disableVertexAttrib(unsigned int index);
+	void disableVertexAttrib(const std::string& name);
 
 
+	/**
+	 * associate a name to a vertex attribute
+	 * @param name the name in shader
+	 * @param sh the shader
+	 * @return the id to use with update (if not using name)
+	 */
+	unsigned int useVertexAttributeName(const std::string& name, const Utils::GLSLShader& sh);
+
 protected:
+
+	/**
+	 * enable a vertex attribute for rendering (updateDate automatically enable attrib)
+	 */
+	void enableVertexAttrib(unsigned int index);
+
+	/**
+	 * disable a vertex attribute for rendering
+	 */
+	void disableVertexAttrib(unsigned int index);
+
 	/**
 	* fill buffer directly from attribute
 	*/

include/Algo/Render/gl3mapRender.hpp

@@ -37,6 +37,60 @@ namespace GL3
 {
 
 
+// inline functions:
+inline void MapRender::enableVertexAttrib(unsigned int index)
+{
+	m_usedAttributes[index] = true ;
+}
+
+inline void MapRender::disableVertexAttrib(unsigned int index)
+{
+	m_usedAttributes[index] = false ;
+}
+
+
+/**
+ * enable a vertex attribute for rendering (updateDate automatically enable attrib)
+ */
+inline void MapRender::enableVertexAttrib(const std::string& name)
+{
+	std::map<std::string,unsigned int>::iterator it = m_attributebyName.find(name);
+	if (it != m_attributebyName.end())
+		enableVertexAttrib(it->second);
+	else
+		std::cerr <<"enableVertexAttrib: unknown attribute "<< name << std::endl;
+}
+
+
+
+inline void MapRender::disableVertexAttrib(const std::string& name)
+{
+	std::map<std::string,unsigned int>::iterator it = m_attributebyName.find(name);
+	if (it != m_attributebyName.end())
+		disableVertexAttrib(it->second);
+	else
+		std::cerr <<"disableVertexAttrib: unknown attribute "<< name << std::endl;
+}
+
+
+
+inline unsigned int MapRender::useVertexAttributeName(const std::string& name, const Utils::GLSLShader& sh)
+{
+	unsigned int vertex_attrib =0;
+
+	std::map<std::string,unsigned int>::iterator it = m_attributebyName.find(name);
+	if (it == m_attributebyName.end())
+	{
+		vertex_attrib = m_nbVertexAttrib++;
+		m_attributebyName.insert(std::pair<std::string,unsigned int>(name,vertex_attrib));
+	}
+	else
+		vertex_attrib = it->second;
+
+	sh.bindAttrib(vertex_attrib,name.c_str());
+
+	return vertex_attrib;
+}
 
 template <typename ATTR_HANDLER>
 void MapRender::updateData(unsigned int vertex_attrib, const ATTR_HANDLER& attrib, ConvertAttrib* conv)
@@ -64,6 +118,30 @@ void MapRender::updateData(unsigned int vertex_attrib, const ATTR_HANDLER& attri
 
 
 
+
+
+
+template <typename ATTR_HANDLER>
+void MapRender::updateData(const std::string& name, const ATTR_HANDLER& attrib, ConvertAttrib* conv)
+{
+	unsigned int vertex_attrib = 0;
+
+	std::map<std::string,unsigned int>::iterator it = m_attributebyName.find(name);
+	if (it == m_attributebyName.end())
+	{
+		vertex_attrib = m_nbVertexAttrib++;
+		m_attributebyName.insert(std::pair<std::string,unsigned int>(name,vertex_attrib));
+		std::cerr << "warning update data with unknown name, adding vertex attribute"<< std::endl;
+	}
+	else
+	{
+		vertex_attrib = it->second;
+	}
+
+	updateData<ATTR_HANDLER>(vertex_attrib,attrib,conv);
+}
+
+
 template <typename ATTR_HANDLER>
 void MapRender::fillBufferDirect(unsigned int indexVBO, const ATTR_HANDLER& attrib)
 {

include/Utils/GLSLShader.h

@@ -217,7 +217,7 @@ public:
 	/**
 	 * bind vertex attribute with its name in shaders
 	 */
-	void bindAttrib(unsigned int att, const char* name);
+	void bindAttrib(unsigned int att, const char* name) const;
 
 
 	bool validateProgram();

include/Utils/glutwin.h

@@ -31,9 +31,16 @@
 #define __X_GL_H
 #define GLAPIENTRY
 #include <GL/freeglut.h>
+
 #ifndef WIN32
-	#include <GL/glx.h>
+	#ifdef MAC_OSX
+		#include <OpenGL/CGLCurrent.h>
+	#else
+		#include <GL/glx.h>
+	#endif
 #endif
+
+
 #include "Utils/trackball.h"
 #include <IL/ilu.h>
 #include <IL/ilut.h>
@@ -114,9 +121,14 @@ protected:
 	HDC m_drawable;
 	HGLRC m_context;
 #else
-	Display* m_dpy;
-	GLXDrawable m_drawable;
-	GLXContext m_context;
+	#ifdef MAC_OSX
+		CGLContextObj m_context;
+	#else
+		Display* m_dpy;
+		GLXDrawable m_drawable;
+		GLXContext m_context;
+	#endif
+
 #endif
 
 public:
@@ -131,7 +143,7 @@ public:
 	/**
 	* constructor
 	*/
-	SimpleGlutWin(int* argc, char **argv, int winX, int winY, bool gl3=false);
+	SimpleGlutWin(int* argc, char **argv, int winX, int winY);
 
 	/**
 	* destructor

include/Utils/glutwingl3.h

@@ -112,6 +112,9 @@ protected:
 	// table of shaders
 	static Utils::GLSLShader* m_current_shaders;
 
+
+	static void recalcModelView();
+
 	// internal callbacks
 	static void redraw(void);
 
@@ -127,14 +130,9 @@ protected:
 
 	static void keyboard(unsigned char keycode, int x, int y);
 
-	static void recalcModelView();
-
 	static SimpleGlutWinGL3* instance;
 
 protected:
-	static GLfloat lightZeroPosition[4];
-
-	static GLfloat lightZeroColor[4];
 
 	virtual void myKeyboard(unsigned char, int, int) {}
 

src/Algo/Render/gl3mapRender.cpp

@@ -37,8 +37,11 @@ namespace GL3
 {
 
 MapRender::MapRender():
+	m_nbVertexAttrib(0),
 	m_nbIndicesTri(0),
-	m_nbIndicesLines(0)
+	m_nbIndicesLines(0),
+	m_nbIndicesPoints(0),
+	m_nbFlatElts(0)
 {
 	glGenBuffersARB(4, m_VBOBuffers) ;
 
@@ -56,7 +59,7 @@ MapRender::~MapRender()
 	glDeleteBuffersARB(4, m_VBOBuffers);
 	delete[] m_VBOBuffers ;
 
-	for(unsigned int i = 4; i < NB_BUFFERS; ++i)
+	for(unsigned int i = 4; i < 4+m_nbVertexAttrib; ++i)
 	{
 		if (m_allocatedAttributes[i])
 			glDeleteBuffersARB(4, &(m_VBOBuffers[i]));
@@ -65,8 +68,11 @@ MapRender::~MapRender()
 
 
 MapRender::MapRender(const MapRender& mrvbo):
+	m_nbVertexAttrib(mrvbo.m_nbVertexAttrib),
 	m_nbIndicesTri(0),
-	m_nbIndicesLines(0)
+	m_nbIndicesLines(0),
+	m_nbIndicesPoints(0),
+	m_nbFlatElts(0)
 {
 	glGenBuffersARB(3, m_VBOBuffers) ; // gen only for indices
 	// get back others from mrvbo
@@ -79,15 +85,6 @@ MapRender::MapRender(const MapRender& mrvbo):
 }
 
 
-void MapRender::enableVertexAttrib(unsigned int index)
-{
-	m_usedAttributes[index] = true ;
-}
-
-void MapRender::disableVertexAttrib(unsigned int index)
-{
-	m_usedAttributes[index] = false ;
-}
 
 
 void MapRender::initPrimitives(int prim, std::vector<GLuint>& tableIndices)
@@ -122,24 +119,21 @@ void MapRender::initPrimitives(int prim, std::vector<GLuint>& tableIndices)
 
 void MapRender::drawTriangles(bool bindColors)
 {
-
-	for(unsigned int i = FIRST_ATTRIBUTE_BUFFER; i < NB_BUFFERS; ++i)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
-		unsigned int j = i-FIRST_ATTRIBUTE_BUFFER;
 		if(m_usedAttributes[j])
 		{
-			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[i]);
+			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[j+FIRST_ATTRIBUTE_BUFFER]);
 			glEnableVertexAttribArray(j);
 			glVertexAttribPointer(j, m_AttributesDataSize[j], GL_FLOAT, false, 0, 0);
 		}
 	}
 
 	glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, m_VBOBuffers[TRIANGLE_INDICES]);
-//	glEnableClientState(GL_INDEX_ARRAY);
+
 	glDrawElements(GL_TRIANGLES, m_nbIndicesTri, GL_UNSIGNED_INT, 0);
-//	glDisableClientState(GL_INDEX_ARRAY);
 
-	for(unsigned int j = 0; j < NB_BUFFERS-FIRST_ATTRIBUTE_BUFFER; ++j)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
 		if(m_usedAttributes[j])
 		{
@@ -150,12 +144,11 @@ void MapRender::drawTriangles(bool bindColors)
 
 void MapRender::drawLines(bool bindColors)
 {
-	for(unsigned int i = FIRST_ATTRIBUTE_BUFFER; i < NB_BUFFERS; ++i)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
-		unsigned int j = i-FIRST_ATTRIBUTE_BUFFER;
 		if(m_usedAttributes[j])
 		{
-			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[i]);
+			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[j+FIRST_ATTRIBUTE_BUFFER]);
 			glEnableVertexAttribArray(j);
 			glVertexAttribPointer(j, m_AttributesDataSize[j], GL_FLOAT, false, 0, 0);
 
@@ -167,7 +160,7 @@ void MapRender::drawLines(bool bindColors)
 	glDrawElements(GL_LINES, m_nbIndicesLines, GL_UNSIGNED_INT, 0);
 //	glDisableClientState(GL_INDEX_ARRAY);
 
-	for(unsigned int j = 0; j < NB_BUFFERS-FIRST_ATTRIBUTE_BUFFER; ++j)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
 		if(m_usedAttributes[j])
 		{
@@ -178,23 +171,21 @@ void MapRender::drawLines(bool bindColors)
 
 void MapRender::drawPoints(bool bindColors)
 {
-	for(unsigned int i = FIRST_ATTRIBUTE_BUFFER; i < NB_BUFFERS; ++i)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
-		unsigned int j = i-FIRST_ATTRIBUTE_BUFFER;
 		if(m_usedAttributes[j])
 		{
-			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[i]);
+			glBindBufferARB(GL_ARRAY_BUFFER, m_VBOBuffers[j+FIRST_ATTRIBUTE_BUFFER]);
 			glEnableVertexAttribArray(j);
 			glVertexAttribPointer(j, m_AttributesDataSize[j], GL_FLOAT, false, 0, 0);
 		}
 	}
 
 	glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, m_VBOBuffers[POINT_INDICES]);
-//	glEnableClientState(GL_INDEX_ARRAY);
+
 	glDrawElements(GL_POINTS, m_nbIndicesPoints, GL_UNSIGNED_INT, 0) ;
-//	glDisableClientState(GL_INDEX_ARRAY);
 
-	for(unsigned int j = 0; j < NB_BUFFERS-FIRST_ATTRIBUTE_BUFFER; ++j)
+	for(unsigned int j = 0; j < m_nbVertexAttrib; ++j)
 	{
 		if(m_usedAttributes[j])
 		{

src/Utils/GLSLShader.cpp

@@ -645,7 +645,7 @@ bool GLSLShader::checkShader(int shaderType)
 
 
 
-void GLSLShader::bindAttrib(unsigned int att, const char* name)
+void GLSLShader::bindAttrib(unsigned int att, const char* name) const
 {
 	glBindAttribLocation(m_program_object,att,name);
 }

src/Utils/glutwin.cpp

@@ -60,7 +60,7 @@ int SimpleGlutWin::W=0;
 int SimpleGlutWin::H=0;
 bool SimpleGlutWin::m_noMouse=false;
 
-SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY, bool gl3)
+SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY)
 {
 	instance = this;
 	spinning = 0;
@@ -71,11 +71,6 @@ SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY, bool gl
 	trans_y=0.;
 	trans_z=-50.0f;
 
-	if (gl3)
-	{
-		glutInitContextVersion (3, 2);
-		glutInitContextFlags (GLUT_FORWARD_COMPATIBLE | GLUT_DEBUG);
-	}
 
 	std::cout << "Initialisation Glut" << std::endl;
 	glutInit(argc, argv);
@@ -92,6 +87,7 @@ SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY, bool gl
 	glutKeyboardFunc(keyboard);
 
 	std::cout << "Initialisation OpenGL" << std::endl;
+	std::cout << glGetString(GL_VERSION)<<std::endl;
 	shaderOk = Utils::GLSLShader::init();
 
 	glViewport(0, 0, W, H);
@@ -116,9 +112,13 @@ SimpleGlutWin::SimpleGlutWin(int* argc, char **argv, int winX, int winY, bool gl
 	m_drawable = wglGetCurrentDC();
 	m_context = wglGetCurrentContext();
 #else
-	m_dpy = glXGetCurrentDisplay();
-	m_drawable = glXGetCurrentDrawable();
-	m_context = glXGetCurrentContext();
+	#ifdef MAC_OSX
+		m_context = CGLGetCurrentContext();
+	#else
+		m_dpy = glXGetCurrentDisplay();
+		m_drawable = glXGetCurrentDrawable();
+		m_context = glXGetCurrentContext();
+	#endif
 #endif
 	// Call other initialization (possibly overloaded in instances)
 	instance->init();
@@ -129,7 +129,11 @@ void SimpleGlutWin::releaseContext()
 #ifdef WIN32
 	wglMakeCurrent(NULL,NULL);
 #else
-	glXMakeCurrent(m_dpy,None,NULL);
+	#ifdef MAC_OSX
+		CGLSetCurrentContext(NULL);
+	#else
+		glXMakeCurrent(m_dpy,None,NULL);
+	#endif