Code cleanup and updating comments

src/HiddenLines.cpp

@@ -11,6 +11,7 @@
 
 HL::HL()
 {
+	//Read from CSV and construct the problem from the given lines
 	lines = construct_HWprob();
 }
 
@@ -19,10 +20,12 @@ void HL::print_sol()
 	std::cout << "Not yet implemented" << std::endl;
 }
 
+//Divide and Conquer Strategy using recursive call to divide ls and merge using merge()
 std::set<Line> HL::gen_sol(std::set<Line>& ls){
 	if (ls.size() > 2){
 		HL inst = *this;
 
+		//Create left and right half sets
 		int split = ceil(ls.size()/2);
 		std::set<Line> lh;
 		std::set<Line> rh;
@@ -39,33 +42,45 @@ std::set<Line> HL::gen_sol(std::set<Line>& ls){
 			rh.insert(*itr);
 		}
 
+		//Recursive call
 		return merge(inst.gen_sol(lh), inst.gen_sol(rh));
 	}
 
+	//Set with 2 lines is a base case: both are visible at +-inf respectively, and intersection is where they change 
+	//visibility
 	else if (ls.size() == 2){
 		auto l1 = *(ls.begin());
 		auto l2 = *(ls.end());
 		double isec = (l2.get_ycept() - l1.get_ycept())/(l1.get_slope() - l2.get_slope());
-		l1.set_vis_start(-std::numeric_limits<double>::infinity());
-		l1.set_vis_end(isec);
-		l2.set_vis_start(isec);
-		l2.set_vis_end(std::numeric_limits<double>::infinity());
+
+		//Smaller Slope: vis from isec to inf
+		l1.set_vis_start(isec);
+		l1.set_vis_end(std::numeric_limits<double>::infinity());
+
+
+		//Greater Slope: vis from -inf to isec
+		l2.set_vis_start(-std::numeric_limits<double>::infinity());
+		l2.set_vis_end(isec);
 
 		return ls;
 	}
 
+	//Set with 1 line: vis at +-inf
 	else{
 		auto l1 = *(ls.begin());
 		l1.set_vis_start(-std::numeric_limits<double>::infinity());
 		l1.set_vis_end(std::numeric_limits<double>::infinity());
+
+		return ls;
 	}
 
 	return sol;
 }
 
 std::set<Line> HL::construct_HWprob(){
-	//Vector to hold all our Lines
+	//Set to hold all our Lines
 	std::set<Line> lines;
+
 	//Hold our doubles from each line
 	std::vector<double> tmp_data;
 
@@ -81,7 +96,7 @@ std::set<Line> HL::construct_HWprob(){
         	}
         }
     }
-
+    //Close file
     data.close();
 
     while(!tmp_data.empty()){
@@ -113,6 +128,15 @@ std::set<Line> merge(std::set<Line> lh, std::set<Line> rh){
 	while(litr != lh.end() && ritr != rh.end()){
 		Line l1 = *litr;
 		Line l2 = *ritr;
+
+		if(l1.get_slope() < l2.get_slope()){
+			litr++;
+			continue;
+		}
+		else{
+
+		}
+
 	}
 }
 

src/HiddenLines.h

@@ -16,13 +16,10 @@ class HL
 		std::set<Line> get_lines();
 		std::set<Line> get_sol();
 
-
 	private:
 		std::set<Line> sol;
 		std::set<Line> lines;
 		std::set<std::pair<Line, double>> isec;
-
-
 };
 
 std::set<Line> merge(std::set<Line> lh, std::set<Line> rh);