add clipping plane to pointSprite

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/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/pointSprite.cpp

@@ -79,6 +79,7 @@ void PointSprite::getLocations()
 	*m_uniform_lightPos = glGetUniformLocation(program_handler(),"lightPos");
 	if (plane)
 		*m_uniform_eyePos = glGetUniformLocation(program_handler(),"eyePos");
+	*m_unif_planeClip = glGetUniformLocation(this->program_handler(), "planeClip");
 	unbind();
 }
 
@@ -92,6 +93,8 @@ void PointSprite::sendParams()
 	glUniform3fv(*m_uniform_lightPos, 1, m_lightPos.data());
 	if (plane)
 		glUniform3fv(*m_uniform_eyePos, 1, m_eyePos.data());
+	if (*m_unif_planeClip > 0)
+		glUniform4fv(*m_unif_planeClip, 1, m_planeClip.data());
 	unbind();
 }
 
@@ -163,6 +166,15 @@ void PointSprite::setEyePosition(const Geom::Vec3f& ep)
 	}
 }
 
+void PointSprite::setClippingPlane(const Geom::Vec4f& plane)
+{
+	m_planeClip = plane;
+	bind();
+	glUniform4fv(*m_unif_planeClip, 1, plane.data());
+	unbind();
+}
+
+
 void PointSprite::restoreUniformsAttribs()
 {
 	getLocations();