Merge branch 'develop' into 'develop'

Develop

See merge request !55

Apps/CMakeLists.txt

@@ -19,7 +19,11 @@ IF (WIN32)
 	ENDIF()
 ELSE()
 	link_directories( ${CGoGN_ROOT_DIR}/lib/${CMAKE_BUILD_TYPE} )
-	SET(EXECUTABLE_OUTPUT_PATH ${CGoGN_ROOT_DIR}/bin/${CMAKE_BUILD_TYPE} )
+	IF(APPLE)
+		SET(EXECUTABLE_OUTPUT_PATH ${CGoGN_ROOT_DIR}/bin/${CMAKE_BUILD_TYPE}/Contents/MacOS/ )
+	ELSE()
+		SET(EXECUTABLE_OUTPUT_PATH ${CGoGN_ROOT_DIR}/bin/${CMAKE_BUILD_TYPE} )
+	ENDIF()
 ENDIF()
 
 #include_directories(

Apps/Examples/viewer.cpp

@@ -45,7 +45,7 @@ Viewer::Viewer() :
 	faceShrinkage = 1.0f ;
 
 	colClear = Geom::Vec4f(0.2f, 0.2f, 0.2f, 0.1f) ;
-	colDif = Geom::Vec4f(0.8f, 0.9f, 0.7f, 1.0f) ;
+	colDif = Geom::Vec4f(0.3f, 0.5f, 0.2f, 1.0f) ;
 	colSpec = Geom::Vec4f(0.9f, 0.9f, 0.9f, 1.0f) ;
 	colNormal = Geom::Vec4f(1.0f, 0.0f, 0.0f, 1.0f) ;
 	shininess = 80.0f ;
@@ -92,31 +92,33 @@ void Viewer::cb_initGL()
 	m_positionVBO = new Utils::VBO() ;
 	m_normalVBO = new Utils::VBO() ;
 
-	m_phongShader = new Utils::ShaderPhong() ;
+	m_phongShader = new Utils::ShaderPhong(true,false,false) ;
 	m_phongShader->setAttributePosition(m_positionVBO) ;
 	m_phongShader->setAttributeNormal(m_normalVBO) ;
 	m_phongShader->setAmbiant(colClear) ;
 	m_phongShader->setDiffuse(colDif) ;
 	m_phongShader->setSpecular(colSpec) ;
 	m_phongShader->setShininess(shininess) ;
+	m_phongShader->setBackColor(Geom::Vec4f(0,0,0.2,0)) ;
 
-	m_flatShader = new Utils::ShaderSimpleFlat() ;
+	m_flatShader = new Utils::ShaderSimpleFlat(true,false) ;
 	m_flatShader->setAttributePosition(m_positionVBO) ;
 	m_flatShader->setAmbiant(colClear) ;
 	m_flatShader->setDiffuse(colDif) ;
-//	m_flatShader->setDiffuseBack(Geom::Vec4f(0,0,0,0)) ;
-//	m_flatShader->setExplode(faceShrinkage) ;
+	m_flatShader->setBackColor(Geom::Vec4f(0,0,0.2,0)) ;
+
 
 	m_vectorShader = new Utils::ShaderVectorPerVertex() ;
 	m_vectorShader->setAttributePosition(m_positionVBO) ;
 	m_vectorShader->setAttributeVector(m_normalVBO) ;
 	m_vectorShader->setColor(colNormal) ;
 
-	m_simpleColorShader = new Utils::ShaderSimpleColor() ;
+	m_simpleColorShader = new Utils::ShaderSimpleColor(true) ;
 	m_simpleColorShader->setAttributePosition(m_positionVBO) ;
 	Geom::Vec4f c(0.0f, 0.0f, 0.0f, 1.0f) ;
 	m_simpleColorShader->setColor(c) ;
 
+
 	m_pointSprite = new Utils::PointSprite() ;
 	m_pointSprite->setAttributePosition(m_positionVBO) ;
 	m_pointSprite->setColor(Geom::Vec4f(0.0f, 0.0f, 1.0f, 1.0f)) ;
@@ -132,25 +134,31 @@ void Viewer::cb_redraw()
 {
 	if(m_drawVertices)
 	{
-		glDepthFunc(GL_LEQUAL);
 		m_pointSprite->setSize(vertexScaleFactor) ;
 		m_render->draw(m_pointSprite, Algo::Render::GL2::POINTS) ;
 	}
 
 	if(m_drawEdges)
 	{
-		glDepthFunc(GL_LEQUAL);
+		m_simpleColorShader->setColor(Geom::Vec4f(1.,1.,0.,0.));
 		glLineWidth(1.0f) ;
 		m_render->draw(m_simpleColorShader, Algo::Render::GL2::LINES) ;
 	}
 
+	if(m_drawTopo)
+	{
+		glDepthFunc(GL_LEQUAL);
+		m_topoRender->drawTopo() ;
+	}
+
 	if(m_drawFaces)
 	{
 		glPolygonMode(GL_FRONT_AND_BACK, GL_FILL) ;
-		glEnable(GL_LIGHTING) ;
-		glEnable(GL_POLYGON_OFFSET_FILL) ;
-		glPolygonOffset(1.0f, 1.0f) ;
-		glDepthFunc(GL_LESS);
+		if (m_drawEdges||m_drawTopo)
+		{
+			glEnable(GL_POLYGON_OFFSET_FILL) ;
+			glPolygonOffset(1.0f, 1.0f) ;
+		}
 		switch(m_renderStyle)
 		{
 			case FLAT :
@@ -163,11 +171,7 @@ void Viewer::cb_redraw()
 		glDisable(GL_POLYGON_OFFSET_FILL) ;
 	}
 
-	if(m_drawTopo)
-	{
-		glDepthFunc(GL_LEQUAL);
-		m_topoRender->drawTopo() ;
-	}
+
 
 	if(m_drawNormals)
 	{
@@ -210,6 +214,32 @@ void Viewer::cb_keyPress(int keycode)
 {
 	switch(keycode)
 	{
+	case 'n':
+		m_flatShader->setNoClippingPlane();
+		m_phongShader->setNoClippingPlane();
+		m_topoRender->setNoClippingPlane();
+		m_simpleColorShader->setNoClippingPlane();
+		m_pointSprite->setNoClippingPlane();
+		m_vectorShader->setNoClippingPlane();
+
+		break;
+	case 'N':
+	{
+		const Geom::Vec3f& Pc = bb.center();
+		const Geom::Vec3f& Nc = bb.diag();
+		Geom::Vec4f planeClip(Nc[0],Nc[1],Nc[2],-(Pc*Nc));
+
+		m_flatShader->setClippingPlane(planeClip);
+		m_phongShader->setClippingPlane(planeClip);
+		m_topoRender->setClippingPlane(planeClip);
+		m_simpleColorShader->setClippingPlane(planeClip);
+		m_pointSprite->setClippingPlane(planeClip);
+		m_vectorShader->setClippingPlane(planeClip);
+
+	}
+		break;
+
+
 		case 'c' :
 			myMap.check();
 			break;
@@ -578,6 +608,18 @@ void Viewer::importMesh(std::string& filename)
 	m_normalVBO->updateData(normal) ;
 
 	setParamObject(bb.maxSize(), bb.center().data()) ;
+
+	const Geom::Vec3f& Pc = bb.center();
+	const Geom::Vec3f& Nc = bb.diag();
+	Geom::Vec4f planeClip(Nc[0],Nc[1],Nc[2],-(Pc*Nc));
+
+//	m_flatShader->setClippingPlane(planeClip);
+//	m_phongShader->setClippingPlane(planeClip);
+//	m_topoRender->setClippingPlane(planeClip);
+//	m_simpleColorShader->setClippingPlane(planeClip);
+//	m_pointSprite->setClippingPlane(planeClip);
+//	m_vectorShader->setClippingPlane(planeClip);
+
 	updateGLMatrices() ;
 
 	std::cout << "#vertices -> " << Algo::Topo::getNbOrbits<VERTEX>(myMap) << std::endl;

CGoGN/CMakeLists.txt

@@ -107,11 +107,9 @@ link_directories( ${CGoGN_ROOT_DIR}/lib/${CMAKE_BUILD_TYPE} )
 
 IF (CGoGN_ONELIB)
 	IF(CGoGN_WITH_QT)
+		add_definitions(-DCGoGN_QT_DLL_EXPORT)
 		add_library( cgogn ${files_topology} ${files_container} ${files_algo} ${files_utils_withQt}) 
 		qt_use_modules(cgogn Gui OpenGL Xml Svg)
-		IF(${CGoGN_DESIRED_QT_VERSION} STREQUAL "5")
-			qt_use_modules(cgogn Widgets)
-		ENDIF()
 	ELSE()
 		add_library( cgogn ${files_topology} ${files_container} ${files_algo} ${files_utils} )
 	ENDIF()

CGoGN/include/Utils/Shaders/shaderPhong.frag

@@ -9,6 +9,8 @@ uniform vec4 materialDiffuse;
 uniform vec4 materialSpecular;
 uniform vec4 materialAmbient;
 uniform float shininess;
+uniform vec4 backColor;
+
 FRAG_OUT_DEF;
 void main()
 {
@@ -51,6 +53,10 @@ void main()
 		float specular = pow( max(dot(R, E), 0.0), shininess );
 		finalColor += materialSpecular * specular;
 	}
+	else
+	{
+		finalColor = backColor;
+	}
 #endif
 	FRAG_OUT=finalColor;
 }

CGoGN/include/Utils/Shaders/shaderPhong.h

@@ -48,8 +48,10 @@ protected:
 	bool m_with_eyepos;	
 
 	// shader sources OGL3
-    static std::string vertexShaderText;
-    static std::string fragmentShaderText;
+	static std::string vertexShaderText;
+	static std::string fragmentShaderText;
+	static std::string vertexShaderClipText;
+	static std::string fragmentShaderClipText;
 
     // uniform locations
 	CGoGNGLuint m_unif_ambiant;
@@ -58,6 +60,7 @@ protected:
 	CGoGNGLuint m_unif_shininess;
 	CGoGNGLuint m_unif_lightPos;
 	CGoGNGLuint m_unif_eyePos;
+	CGoGNGLuint m_unif_backColor;
 
 	//values
 	Geom::Vec4f m_ambiant;
@@ -66,11 +69,16 @@ protected:
 	float m_shininess;
 	Geom::Vec3f m_lightPos;
 	Geom::Vec3f m_eyePos;
+	Geom::Vec4f m_backColor;
 
 	VBO* m_vboPos;
 	VBO* m_vboNormal;
 	VBO* m_vboColor;
 
+	/// clipping
+	CGoGNGLuint m_unif_planeClip;
+	Geom::Vec4f m_planeClip;
+
 	void getLocations();
 
 	void sendParams();
@@ -78,7 +86,7 @@ protected:
 	void restoreUniformsAttribs();
 
 public:
-	ShaderPhong(bool doubleSided = false, bool withEyePosition=false);
+	ShaderPhong(bool withClipping = false ,bool doubleSided = false, bool withEyePosition=false);
 
 	// inviduals parameter setting functions
 	void setAmbiant(const Geom::Vec4f& ambiant);
@@ -90,6 +98,8 @@ public:
 	void setShininess(float shininess);
 
 	void setLightPosition(const Geom::Vec3f& lp);
+
+	void setBackColor(const Geom::Vec4f& back);
 	
 	/// set eye position for VR environement
 	void setEyePosition(const Geom::Vec3f& ep);
@@ -117,6 +127,10 @@ public:
 	// optional attributes
 	unsigned int setAttributeColor(VBO* vbo);
 	void unsetAttributeColor();
+
+	void setClippingPlane(const Geom::Vec4f& plane);
+
+	inline void setNoClippingPlane() { setClippingPlane(Geom::Vec4f(0.0f,0.0f,0.0f,0.0f)); }
 };
 
 } // namespace Utils

CGoGN/include/Utils/Shaders/shaderPhongClip.frag

+//ShaderPhong::fragmentShaderClipText
+
+PRECISION;
+VARYING_FRAG vec3 EyeVector, Normal, LightDir;
+#ifdef WITH_COLOR
+VARYING_FRAG vec3 Color;
+#endif
+uniform vec4 materialDiffuse;
+uniform vec4 materialSpecular;
+uniform vec4 materialAmbient;
+uniform float shininess;
+uniform vec4 backColor;
+
+uniform vec4 planeClip;
+VARYING_FRAG vec3 posClip;
+
+FRAG_OUT_DEF;
+
+void main()
+{
+	if (dot(planeClip,vec4(posClip,1.0))>0.0)
+		discard;
+
+	vec3 N = normalize (Normal);
+	vec3 L = normalize (LightDir);
+	//float lambertTerm = clamp(dot(N,L),0.0,1.0);
+
+	vec4 finalColor = materialAmbient;
+
+#ifdef DOUBLE_SIDED
+	float lambertTerm;
+	vec4 diffuseColor = materialDiffuse;
+	if (!gl_FrontFacing)
+	{
+		N *= -1.0;
+		lambertTerm = clamp(dot(N,L),0.0,1.0);
+	}
+	else
+		lambertTerm = clamp(dot(N,L),0.0,1.0);
+#ifndef WITH_COLOR
+	finalColor += materialDiffuse * lambertTerm;
+#else
+	finalColor += vec4((Color*lambertTerm),0.0) ;
+#endif
+	vec3 E = normalize(EyeVector);
+	vec3 R = reflect(-L, N);
+	float specular = pow( max(dot(R, E), 0.0), shininess );
+	finalColor += materialSpecular * specular;
+#else
+	float lambertTerm = clamp(dot(N,L),0.0,1.0);
+	if (gl_FrontFacing)
+	{
+#ifndef WITH_COLOR
+		finalColor += materialDiffuse * lambertTerm;
+#else
+		finalColor += vec4((Color*lambertTerm),0.0) ;
+#endif
+		vec3 E = normalize(EyeVector);
+		vec3 R = reflect(-L, N);
+		float specular = pow( max(dot(R, E), 0.0), shininess );
+		finalColor += materialSpecular * specular;
+	}
+	else
+	{
+		finalColor = backColor;
+	}
+#endif
+	FRAG_OUT=finalColor;
+}

CGoGN/include/Utils/Shaders/shaderPhongClip.vert

+//ShaderPhong::vertexShaderClipText
+
+ATTRIBUTE vec3 VertexPosition, VertexNormal;
+#ifdef WITH_COLOR
+ATTRIBUTE vec3 VertexColor;
+#endif
+uniform mat4 ModelViewProjectionMatrix;
+uniform mat4 ModelViewMatrix;
+uniform mat4 NormalMatrix;
+uniform vec3 lightPosition;
+VARYING_VERT vec3 EyeVector, Normal, LightDir;
+
+#ifdef WITH_COLOR
+VARYING_VERT vec3 Color;
+#endif
+
+#ifdef WITH_EYEPOSITION
+uniform vec3 eyePosition;
+#endif
+
+VARYING_VERT vec3 posClip;
+
+INVARIANT_POS;
+
+void main ()
+{
+	Normal = vec3 (NormalMatrix * vec4 (VertexNormal, 0.0));
+ 	vec3 Position = vec3 (ModelViewMatrix * vec4 (VertexPosition, 1.0));
+	LightDir = lightPosition - Position;
+	#ifdef WITH_EYEPOSITION
+		EyeVector = eyePosition-Position;
+	#else
+		EyeVector = -Position;
+	#endif
+	#ifdef WITH_COLOR
+		Color = VertexColor;
+	#endif
+
+	posClip = VertexPosition;
+	gl_Position = ModelViewProjectionMatrix * vec4 (VertexPosition, 1.0);
+}

CGoGN/include/Utils/Shaders/shaderSimpleColor.h

@@ -67,6 +67,9 @@ public:
 	unsigned int setAttributePosition(VBO* vbo);
 
 	void setClippingPlane(const Geom::Vec4f& plane);
+
+	inline void setNoClippingPlane() { setClippingPlane(Geom::Vec4f(0.0f,0.0f,0.0f,0.0f)); }
+
 };
 
 } // namespace Utils

CGoGN/include/Utils/Shaders/shaderSimpleFlat.frag

@@ -10,6 +10,8 @@ uniform vec4 materialDiffuse;
 uniform vec4 materialSpecular;
 uniform vec4 materialAmbient;
 uniform float shininess;
+uniform vec4 backColor;
+
 FRAG_OUT_DEF;
 
 void main()
@@ -47,6 +49,10 @@ void main()
 		finalColor += vec4((Color*lambertTerm),0.0) ;
 #endif
 	}
+	else
+	{
+		finalColor = backColor;
+	}
 #endif
 	FRAG_OUT=finalColor;
 }

CGoGN/include/Utils/Shaders/shaderSimpleFlat.h

@@ -48,22 +48,31 @@ protected:
 	bool m_with_eyepos;	
 
 	// shader sources OGL3
-    static std::string vertexShaderText;
-    static std::string fragmentShaderText;
+	static std::string vertexShaderText;
+	static std::string fragmentShaderText;
+	static std::string vertexShaderClipText;
+	static std::string fragmentShaderClipText;
 
     // uniform locations
 	CGoGNGLuint m_unif_ambiant;
 	CGoGNGLuint m_unif_diffuse;
 	CGoGNGLuint m_unif_lightPos;
+	CGoGNGLuint m_unif_backColor;
 
 	//values
 	Geom::Vec4f m_ambiant;
 	Geom::Vec4f m_diffuse;
 	Geom::Vec3f m_lightPos;
+	Geom::Vec4f m_backColor;
 
 	VBO* m_vboPos;
 	VBO* m_vboColor;
 
+	/// clipping
+	CGoGNGLuint m_unif_planeClip;
+	Geom::Vec4f m_planeClip;
+
+
 	void getLocations();
 
 	void sendParams();
@@ -71,16 +80,17 @@ protected:
 	void restoreUniformsAttribs();
 
 public:
-	ShaderSimpleFlat(bool doubleSided = false);
+	ShaderSimpleFlat(bool withClipping = false, bool doubleSided = false);
 
 	// inviduals parameter setting functions
 	void setAmbiant(const Geom::Vec4f& ambiant);
 
 	void setDiffuse(const Geom::Vec4f& diffuse);
 
-
 	void setLightPosition(const Geom::Vec3f& lp);
-	
+
+	void setBackColor(const Geom::Vec4f& back);
+
 	const Geom::Vec4f& getAmbiant() const { return m_ambiant; }
 
 	const Geom::Vec4f& getDiffuse() const { return m_diffuse; }
@@ -98,6 +108,11 @@ public:
 	// optional attributes
 	unsigned int setAttributeColor(VBO* vbo);
 	void unsetAttributeColor();
+
+	void setClippingPlane(const Geom::Vec4f& plane);
+
+	inline void setNoClippingPlane() { setClippingPlane(Geom::Vec4f(0.0f,0.0f,0.0f,0.0f)); }
+
 };
 
 } // namespace Utils

CGoGN/include/Utils/Shaders/shaderSimpleFlatClip.frag

+//ShaderSimpleFlat::fragmentShaderClipText
+
+PRECISION;
+VARYING_FRAG vec3 LightDir;
+VARYING_FRAG vec3 Position;
+#ifdef WITH_COLOR
+VARYING_FRAG vec3 Color;
+#endif
+uniform vec4 materialDiffuse;
+uniform vec4 materialSpecular;
+uniform vec4 materialAmbient;
+uniform float shininess;
+uniform vec4 backColor;
+
+FRAG_OUT_DEF;
+
+uniform vec4 planeClip;
+VARYING_FRAG vec3 posClip;
+
+void main()
+{
+	if (dot(planeClip,vec4(posClip,1.0))>0.0)
+		discard;
+		
+	vec3 DX = dFdx(Position);
+	vec3 DY = dFdy(Position);
+	vec3 N=normalize(cross(DX,DY));
+
+	vec3 L = normalize (LightDir);
+
+	vec4 finalColor = materialAmbient;
+
+#ifdef DOUBLE_SIDED
+	float lambertTerm;
+	vec4 diffuseColor = materialDiffuse;
+	if (!gl_FrontFacing)
+	{
+		N *= -1.0;
+		lambertTerm = clamp(dot(N,L),0.0,1.0);
+	}
+	else
+		lambertTerm = clamp(dot(N,L),0.0,1.0);
+#ifndef WITH_COLOR
+	finalColor += materialDiffuse * lambertTerm;
+#else
+	finalColor += vec4((Color*lambertTerm),0.0) ;
+#endif
+#else
+	float lambertTerm = clamp(dot(N,L),0.0,1.0);
+	if (gl_FrontFacing)
+	{
+#ifndef WITH_COLOR
+		finalColor += materialDiffuse * lambertTerm;
+#else
+		finalColor += vec4((Color*lambertTerm),0.0) ;
+#endif
+	}
+	else
+	{
+		finalColor = backColor;
+	}
+#endif
+	FRAG_OUT=finalColor;
+}

CGoGN/include/Utils/Shaders/shaderSimpleFlatClip.vert

+//ShaderSimpleFlat::vertexShaderClipText
+
+ATTRIBUTE vec3 VertexPosition, VertexNormal;
+#ifdef WITH_COLOR
+ATTRIBUTE vec3 VertexColor;
+#endif
+uniform mat4 ModelViewProjectionMatrix;
+uniform mat4 ModelViewMatrix;
+uniform vec3 lightPosition;
+VARYING_VERT vec3 LightDir;
+VARYING_VERT vec3 Position;
+
+VARYING_VERT vec3 posClip;
+
+#ifdef WITH_COLOR
+VARYING_VERT vec3 Color;
+#endif
+
+INVARIANT_POS;
+void main ()
+{
+	Position = vec3 (ModelViewMatrix * vec4 (VertexPosition, 1.0));
+	LightDir = lightPosition - Position;
+	#ifdef WITH_COLOR
+		Color = VertexColor;
+	#endif
+
+	posClip = VertexPosition;
+	gl_Position = ModelViewProjectionMatrix * vec4 (VertexPosition, 1.0);
+}

CGoGN/include/Utils/Shaders/shaderVectorPerVertex.geom

@@ -3,11 +3,18 @@
 uniform float vectorScale;
 uniform mat4 ModelViewProjectionMatrix;
 VARYING_IN vec3 VectorAttrib[];
+
+uniform vec4 planeClip;
+VARYING_IN vec3 posClip[];
+
 void main()
 {
-	gl_Position = ModelViewProjectionMatrix * POSITION_IN(0);
-	EmitVertex();
-	gl_Position = ModelViewProjectionMatrix * (POSITION_IN(0) + vec4(VectorAttrib[0] * vectorScale, 0.0));
-	EmitVertex();
-	EndPrimitive();
+	if (dot(planeClip,vec4(posClip[0],1.0))<=0.0)
+	{
+		gl_Position = ModelViewProjectionMatrix * POSITION_IN(0);
+		EmitVertex();
+		gl_Position = ModelViewProjectionMatrix * (POSITION_IN(0) + vec4(VectorAttrib[0] * vectorScale, 0.0));
+		EmitVertex();
+		EndPrimitive();
+	}
 }

CGoGN/include/Utils/Shaders/shaderVectorPerVertex.h

@@ -54,6 +54,10 @@ protected:
     VBO* m_vboPos;
     VBO* m_vboVec;
 
+	/// clipping
+	CGoGNGLuint m_unif_planeClip;
+	Geom::Vec4f m_planeClip;
+
 	void getLocations();
 
 	void sendParams();
@@ -61,7 +65,7 @@ protected:
 	void restoreUniformsAttribs();
 
 public:
-    ShaderVectorPerVertex();
+	ShaderVectorPerVertex();
 
 	void setScale(float scale);
 
@@ -70,6 +74,11 @@ public:
 	unsigned int setAttributePosition(VBO* vbo);
 
 	unsigned int setAttributeVector(VBO* vbo);
+
+	void setClippingPlane(const Geom::Vec4f& plane);
+
+	inline void setNoClippingPlane() { setClippingPlane(Geom::Vec4f(0.0f,0.0f,0.0f,0.0f)); }
+
 };
 
 } // namespace Utils

CGoGN/include/Utils/Shaders/shaderVectorPerVertex.vert

@@ -3,9 +3,12 @@
 ATTRIBUTE vec3 VertexPosition;
 ATTRIBUTE vec3 VertexVector;
 VARYING_VERT vec3 VectorAttrib;
+VARYING_VERT vec3 posClip;
+
 INVARIANT_POS;
 void main ()
 {
+	posClip = VertexPosition;
 	VectorAttrib = VertexVector;
 	gl_Position = vec4(VertexPosition, 1.0);
 }

CGoGN/include/Utils/pointSprite.geom

@@ -3,6 +3,9 @@
 uniform float size;
 uniform mat4 ModelViewMatrix;
 uniform mat4 ProjectionMatrix;
+uniform vec4 planeClip;
+
+VARYING_IN vec3 posClip[1];
 
 #ifdef WITH_PLANE
 uniform vec3 eyePos;
@@ -37,10 +40,11 @@ void corner( vec4 center, float x, float y)
 
 void main()
 {
+	if (dot(planeClip,vec4(posClip[0],1.0))<=0.0)
+	{
 #ifdef WITH_COLOR_PER_VERTEX 
 	colorsprite = color[0];
 #endif
-
 	vec4 posCenter = ModelViewMatrix * POSITION_IN(0);
 	sphereCenter = posCenter.xyz;
 	
@@ -65,5 +69,6 @@ void main()
 #endif	
 
 	EndPrimitive();
+	}
 }
 

CGoGN/include/Utils/pointSprite.h

@@ -63,6 +63,11 @@ protected:
 	Geom::Vec3f m_ambiant;
 	Geom::Vec3f m_eyePos;
 
+	/// clipping
+	CGoGNGLuint m_unif_planeClip;
+	Geom::Vec4f m_planeClip;
+
+
 	void getLocations();
 
 	void sendParams();
@@ -93,6 +98,11 @@ public:
 	* set the plane of rendering for VR rendering
 	*/
 	void setEyePosition(const Geom::Vec3f& ep);
+
+	void setClippingPlane(const Geom::Vec4f& plane);
+
+	inline void setNoClippingPlane() { setClippingPlane(Geom::Vec4f(0.0f,0.0f,0.0f,0.0f)); }
+
 };
 
 } // namespace Utils

CGoGN/include/Utils/pointSprite.vert

@@ -6,8 +6,11 @@ ATTRIBUTE vec3 VertexPosition;
 	VARYING_VERT vec4 color;
 #endif
 
+VARYING_VERT vec3 posClip;
+
 void main ()
 {
+	posClip = VertexPosition;
 	gl_Position = vec4(VertexPosition, 1.0);
 #ifdef WITH_COLOR_PER_VERTEX 
 	color = VertexColor;

CGoGN/src/Utils/Shaders/shaderPhong.cpp

@@ -33,9 +33,11 @@ namespace Utils
 
 #include "shaderPhong.vert"
 #include "shaderPhong.frag"
+#include "shaderPhongClip.vert"
+#include "shaderPhongClip.frag"
 
 
-ShaderPhong::ShaderPhong(bool doubleSided, bool withEyePosition):
+ShaderPhong::ShaderPhong(bool withClipping, bool doubleSided, bool withEyePosition):
 	m_with_color(false),
 	m_with_eyepos(withEyePosition),
 	m_ambiant(Geom::Vec4f(0.05f,0.05f,0.1f,0.0f)),
@@ -43,25 +45,39 @@ ShaderPhong::ShaderPhong(bool doubleSided, bool withEyePosition):
 	m_specular(Geom::Vec4f(1.0f,1.0f,1.0f,0.0f)),
 	m_shininess