some changes and bugfixes

lineRenderer.cpp

@@ -35,6 +35,7 @@ namespace vb01{
 			mat4 proj = perspective(radians(fov), width / height, nearPlane, farPlane);
 
 			for(Line &l : lines){
+				if(l.visible){
 					shader->use();
 					shader->setVec3(l.color, "color");
 					shader->setMat4(proj, "proj");
@@ -46,6 +47,7 @@ namespace vb01{
 					glEnd();
 				}
 			}
+		}
 
 		void LineRenderer::addLine(Vector3 start, Vector3 end, Vector3 color){
 				Line line;
@@ -81,9 +83,9 @@ namespace vb01{
 		}
 
 		void LineRenderer::removeLine(int id){
-				for(Line &l : lines)
-						if(l.id == id){
-								lines.erase(lines.begin() + id);
+				for(int i = 0; i < lines.size(); ++i)
+						if(lines[i].id == id){
+								lines.erase(lines.begin() + i);
 								break;
 						}
 		}

lineRenderer.h

@@ -11,15 +11,17 @@ namespace vb01{
 
 		class LineRenderer{
 				public:
-						struct Line{int id; Vector3 start; Vector3 end; Vector3 color;};
+						struct Line{int id; Vector3 start; Vector3 end; Vector3 color; bool visible = true;};
 						enum VectorFieldType{START, END, COLOR};
 
 						static LineRenderer* getSingleton();
 						void drawLines();
 						void addLine(Vector3 start, Vector3 end, Vector3 color);
 						void changeLineField(int, Vector3, VectorFieldType);
+						void toggleVisibility(int i, bool v){getLine(i).visible = v;}
 						void removeLine(int);
 						Line& getLine(int);
+						inline std::vector<Line>& getLines(){return lines;}
 				private:
 						LineRenderer();