This is stuck

Co-authored-by: sigonasr2 <sigonasr2@gmail.com>

input

@@ -0,0 +1,41 @@
+abacccaaaacccccccccccaaaaaacccccaaaaaaccccaaacccccccccccccccccccccccccccccccccccccccccccaaaaa
+abaaccaaaacccccccccccaaaaaaccccccaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccccccaaaaa
+abaaccaaaacccccccccccaaaaacccccaaaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccccccaaaaa
+abccccccccccccccccccccaaaaacccaaaaaaaaaaaaaaaacccccccccccccccccccccccccccaaaccccccccccccaaaaa
+abccccccccccccccccccccaacaacccaaaaaaaaccaaaaaccccccccccccccccccccccccccccaaaccccccccccccaccaa
+abcccccccccccccaacccaaaccccccaaaaaaaaaccaaaaaccccccccccccccccccccccccccccccacccccccccccccccca
+abcccccccccccaaaaaaccaaaccacccccaaaaaaacccccccccccccccccccccccccciiiicccccccddddddccccccccccc
+abcccccccccccaaaaaaccaaaaaaaccccaaaaaacccccaacccccccaaaccccccccciiiiiiiicccdddddddddacaaccccc
+abccccccccccccaaaaaaaaaaaaacccccaaaaaaacaaaacccccccaaaacccccccchhiiiiiiiiicddddddddddaaaccccc
+abcccccccccccaaaaaaaaaaaaaacccccccaaacccaaaaaacccccaaaaccccccchhhipppppiiiijjjjjjjddddaaccccc
+abcccccccccccaaaaaaaaaaaaaaccccccccccccccaaaaaccccccaaaccccccchhhpppppppiijjjjjjjjjddeeaccccc
+abcccccccccccccccccaaaaaaaacccccccccccccaaaaaccccccccccccccccchhppppppppppjjqqqjjjjjeeeaacccc
+abccccccccccccccccccaaaaaaaacccccccccccccccaacccccccccccccccchhhpppuuuupppqqqqqqqjjjeeeaacccc
+abcccccccccccccccccccaacccacccccccccccccccccccccccccccccccccchhhopuuuuuuppqqqqqqqjjjeeecccccc
+abacccccccccccccaaacaaaccccccccccccccccccccccccccccaaccccccchhhhoouuuuuuuqvvvvvqqqjkeeecccccc
+abaccccccccccccaaaaaacccccaaccccccccccccccccccccccaaaccccccchhhooouuuxxxuvvvvvvqqqkkeeecccccc
+abaccccccccccccaaaaaacccaaaaaaccccccccccccccccccaaaaaaaaccchhhhooouuxxxxuvyyyvvqqqkkeeecccccc
+abcccccccccccccaaaaacccaaaaaaaccccccccccccccccccaaaaaaaaccjjhooooouuxxxxyyyyyvvqqqkkeeecccccc
+abccccccccccccccaaaaaacaaaaaaaccccccccaaaccccccccaaaaaaccjjjooootuuuxxxxyyyyyvvqqkkkeeecccccc
+abccccccccccccccaaaaaaaaaaaaacccccccccaaaacccccccaaaaaacjjjooootttuxxxxxyyyyvvrrrkkkeeecccccc
+SbccccccccccccccccccaaaaaaaaacccccccccaaaacccccccaaaaaacjjjoootttxxxEzzzzyyvvvrrrkkkfffcccccc
+abcccccccccccaaacccccaaaaaaacaaaccccccaaaccccccccaaccaacjjjoootttxxxxxyyyyyyvvvrrkkkfffcccccc
+abcccccccccaaaaaacccaaaaaacccaaacacccaacccccccccccccccccjjjoootttxxxxyxyyyyyywvvrrkkkfffccccc
+abcccccccccaaaaaacccaaaaaaaaaaaaaaaccaaacaaacccccaacccccjjjnnnttttxxxxyyyyyyywwwrrkkkfffccccc
+abcaacacccccaaaaacccaaacaaaaaaaaaaaccaaaaaaacccccaacaaacjjjnnnntttttxxyywwwwwwwwrrrlkfffccccc
+abcaaaaccccaaaaacccccccccaacaaaaaaccccaaaaaacccccaaaaacccjjjnnnnnttttwwywwwwwwwrrrrllfffccccc
+abaaaaaccccaaaaaccccccaaaaaccaaaaacaaaaaaaaccccaaaaaaccccjjjjinnnntttwwwwwsssrrrrrllllffccccc
+abaaaaaaccccccccccccccaaaaacaaaaaacaaaaaaaaacccaaaaaaacccciiiiinnnntswwwwssssrrrrrlllfffccccc
+abacaaaaccccccccccccccaaaaaacaaccccaaaaaaaaaaccccaaaaaaccccciiiinnnssswwsssssllllllllfffccccc
+abccaaccccccccccccccccaaaaaaccccccccccaaacaaaccccaaccaacccccciiiinnsssssssmmllllllllfffaacccc
+abccccccccccccccccccccaaaaaaccccccccccaaaccccccccaaccccccccccciiinnmsssssmmmmlllllgggffaacccc
+abcccccccccccccccaccccccaaacccccccccccaaccccccccccccccccccccccciiimmmsssmmmmmgggggggggaaacccc
+abcccccccccaaaaaaaaccccccccccccccccccccccccccccaaaaaccccccccccciiimmmmmmmmmgggggggggaaacccccc
+abccccccccccaaaaaaccccccccccccccccccaacccccccccaaaaacccccccccccciiimmmmmmmhhggggcaaaaaaaccccc
+abccccccccccaaaaaacccccccccccccccccaacccccccccaaaaaacccccccccccciihhmmmmhhhhgccccccccaacccccc
+abccccaacaaaaaaaaaaccccccccccccccccaaaccccccccaaaaaaccccccccccccchhhhhhhhhhhaaccccccccccccccc
+abccccaaaaaaaaaaaaaaccccccccccaaccaaaaccccccccaaaaaacccaaacccccccchhhhhhhhaaaaccccccccccccccc
+abcccaaaaaaaaaaaaaaaccccccccaaaaaacaaaacacaccccaaaccccaaaacccccccccchhhhccccaaccccccccccaaaca
+abcccaaaaaacacaaacccccccccccaaaaaaaaaaaaaaacccccccccccaaaacccccccccccaaaccccccccccccccccaaaaa
+abcccccaaaacccaaaccccccccccaaaaaaaaaaaaaaaaccccccccccccaaacccccccccccaaacccccccccccccccccaaaa
+abcccccaacccccaacccccccccccaaaaaaaaaaaaaccccccccccccccccccccccccccccccccccccccccccccccccaaaaa

main.cpp

@@ -4,86 +4,111 @@
 
 using namespace olc;
 
-class Example : public olc::PixelGameEngine
-{
-public:
-	Example()
-	{
-		sAppName = "Example";
-	}
-
-public:
-    bool RayVsRect(const vf2d ray_origin, const vf2d ray_dir, const olc::utils::geom2d::rect<float> target, vf2d&contact_point, vf2d&contact_normal, float&t_hit_near){
-
-        contact_normal = { 0, 0 };
-        contact_point = { 0, 0 };
-
-        vf2d t_near = {(target.pos.x - ray_origin.x) / ray_dir.x, (target.pos.y - ray_origin.y) / ray_dir.y};
-        vf2d t_far = {(target.pos.x + target.size.x - ray_origin.x) / ray_dir.x, (target.pos.y + target.size.y - ray_origin.y) / ray_dir.y};
-
-        if (t_near.x > t_far.x) {float b; b = t_near.x; t_near.x = t_far.x; t_far.x = b;};
-        if (t_near.y > t_far.y) {float b; b = t_near.y; t_near.y = t_far.y; t_far.y = b;};
-
-        if (t_near.x > t_far.y || t_near.y > t_far.x) return false;
-
-        t_hit_near = fmax(t_near.x, t_near.y);
-        float t_hit_far = fmin(t_far.x, t_far.y);
-
-        if (t_hit_far < 0) return false;
-
-        contact_point.x = ray_origin.x + t_hit_near * ray_dir.x; 
-        contact_point.y = ray_origin.y + t_hit_near * ray_dir.y;
-
-        if (t_near.x > t_near.y)
-            if ( 1.0f / ray_dir.x < 0)
-                contact_normal = { 1, 0 };
-            else
-                contact_normal = { -1, 0};
-        else 
-        if ( t_near.x < t_near.y)
-            if ( 1.0f / ray_dir.y < 0)
-                contact_normal = { 0, 1 };
-            else
-                contact_normal = { 0, -1 };
-        
-        return true;
-
-        
+std::vector<int> validPathStepCounts;
+vi2d playerPos={0,0};
+vi2d endingPos={0,0};
+std::vector<std::vector<char>>grid;
+int lowest=2468;
+
+void step(char currentTile,vi2d pos,int xoffset,int yoffset,int stepCount,std::vector<std::vector<char>>visitedgrid,std::string currentPath){
+    pos.x+=xoffset;
+    pos.y+=yoffset;
+    std::cout<<currentPath<<std::endl;
+    if (currentTile=='S'){
+        currentTile='a';
     }
-    vf2d originPoint={16,16};
-	bool OnUserCreate() override
-	{
-		// Called once at the start, so create things here
-		return true;
-	}
-
-	bool OnUserUpdate(float fElapsedTime) override
-	{
-        vf2d velocity={(GetKey(D).bHeld-GetKey(A).bHeld)*20*fElapsedTime,(GetKey(S).bHeld-GetKey(W).bHeld)*20*fElapsedTime};
-        vf2d contact_point;
-        vf2d contact_normal;
-        float t_hit_near;
-
-		Clear(Pixel(64,64,255));
-        if (!olc::utils::geom2d::overlaps(olc::utils::geom2d::circle<float>{originPoint+velocity,5},olc::utils::geom2d::rect<float>{{32,32},{64,32}})) {
-            originPoint+=velocity;
-            DrawCircle(originPoint,5);
-        } else {
-            DrawCircle(originPoint,5,RED);
+    if (stepCount+abs(pos.x-endingPos.x)+abs(pos.y-endingPos.y)>lowest){
+        //std::cout<<"Took too long..."<<std::endl;
+        return;
+    }
+    if (pos.y<0||pos.x<0||pos.x>=visitedgrid[0].size()||pos.y>=visitedgrid.size()){
+        //std::cout<<"Dead end reached in "<<stepCount<<" steps ("<<currentPath<<")"<<std::endl;
+        return;
+    }
+    if (visitedgrid[pos.y][pos.x]!='0'&&(visitedgrid[pos.y][pos.x]!='E'&&visitedgrid[pos.y][pos.x]-currentTile<=1||visitedgrid[pos.y][pos.x]=='E'&&currentTile>='y')){
+        currentPath+=visitedgrid[pos.y][pos.x];
+        if (visitedgrid[pos.y][pos.x]=='E'){
+            validPathStepCounts.push_back(++stepCount);
+            if (stepCount<lowest){
+                lowest=stepCount;
+                std::cout<<"Valid path found in "<<stepCount<<" steps! ("<<currentPath<<")"<<std::endl;
+            }
+            return;
         }
-        DrawLine(originPoint,GetMousePos());
-
-        DrawRect({32,32},{64,32},RayVsRect(originPoint, GetMousePos()-originPoint, olc::utils::geom2d::rect<float>{{32,32},{64,32}},contact_point,contact_normal,t_hit_near)&&t_hit_near<1?YELLOW:WHITE);
-		return true;
-	}
-};
-
+        ++stepCount;
+        char newTile=visitedgrid[pos.y][pos.x];
+        visitedgrid[pos.y][pos.x]='0';
+        if (pos.y+1<visitedgrid.size()&&visitedgrid[pos.y+1][pos.x]!='0'&&yoffset!=-1){
+            //visitedgrid[pos.y+1][pos.x]='0';
+            std::vector<std::vector<char>>newvisitedgrid=visitedgrid;
+            step(newTile,pos,0,1,stepCount,newvisitedgrid,currentPath);
+        }
+        if (pos.y-1>=0&&visitedgrid[pos.y-1][pos.x]!='0'&&yoffset!=1){
+            //visitedgrid[pos.y-1][pos.x]='0';
+            std::vector<std::vector<char>>newvisitedgrid=visitedgrid;
+            step(newTile,pos,0,-1,stepCount,newvisitedgrid,currentPath);
+        }
+        if (pos.x-1>=0&&visitedgrid[pos.y][pos.x-1]!='0'&&xoffset!=1){
+            //visitedgrid[pos.y][pos.x-1]='0';
+            std::vector<std::vector<char>>newvisitedgrid=visitedgrid;
+            step(newTile,pos,-1,0,stepCount,newvisitedgrid,currentPath);
+        }
+        if (pos.x+1<visitedgrid[0].size()&&visitedgrid[pos.y][pos.x+1]!='0'&&xoffset!=-1){
+            //visitedgrid[pos.y][pos.x+1]='0';
+            std::vector<std::vector<char>>newvisitedgrid=visitedgrid;
+            step(newTile,pos,1,0,stepCount,newvisitedgrid,currentPath);
+        }
+    }
+}
 
 int main()
 {
-	Example demo;
-	if (demo.Construct(128, 120, 8, 8))
-		demo.Start();
+	std::ifstream file("testinput2");
+    while (file.good()){
+        std::string line;
+        std::getline(file,line);
+        std::vector<char>row;
+        if (line.length()>0){
+            for (int x=0;x<line.length();x++){
+                row.push_back(line[x]);
+                if (line[x]=='S'){
+                    playerPos={x,(int)grid.size()};
+                }
+                if (line[x]=='E'){
+                    endingPos={x,(int)grid.size()};
+                }
+            }
+            grid.push_back(row);
+        }
+    }
+
+    std::cout<<"================"<<std::endl;
+    for (int y=0;y<grid.size();y++){
+        for (int x=0;x<grid[y].size();x++){
+            std::cout<<grid[y][x];
+        }
+        std::cout<<std::endl;
+    }
+    std::cout<<"Player Pos: "<<playerPos<<std::endl;
+    char newTile=grid[playerPos.y][playerPos.x];
+    grid[playerPos.y][playerPos.x]='0';
+    std::vector<std::vector<char>>visitedgrid=grid;
+    std::vector<std::vector<char>>visitedgrid2=grid;
+    std::vector<std::vector<char>>visitedgrid3=grid;
+    std::vector<std::vector<char>>visitedgrid4=grid;
+    std::cout<<"Part 1"<<std::endl;
+    step(newTile,playerPos,1,0,0,visitedgrid,"S");
+    std::cout<<"Part 2"<<std::endl;
+    step(newTile,playerPos,-1,0,0,visitedgrid2,"S");
+    std::cout<<"Part 3"<<std::endl;
+    step(newTile,playerPos,0,1,0,visitedgrid3,"S");
+    std::cout<<"Part 4"<<std::endl;
+    step(newTile,playerPos,0,-1,0,visitedgrid4,"S");
+    std::sort(validPathStepCounts.begin(),validPathStepCounts.end());
+    for (int i=0;i<validPathStepCounts.size();i++){
+        std::cout<<validPathStepCounts[i]<<std::endl;
+    }
+    std::cout<<"Best: "<<validPathStepCounts[0]<<std::endl;
 
 	return 0;
 }

testinput

@@ -0,0 +1,5 @@
+Sabqponm
+abcryxxl
+accszExk
+acctuvwj
+abdefghi

testinput2

@@ -0,0 +1,36 @@
+ccccccccccccccccccccccccccacccccccccccccccca
+cccccccccccccccciiiicccccccddddddccccccccccc
+cccaaaccccccccciiiiiiiicccdddddddddacaaccccc
+ccaaaacccccccchhiiiiiiiiicddddddddddaaaccccc
+ccaaaaccccccchhhipppppiiiijjjjjjjddddaaccccc
+cccaaaccccccchhhpppppppiijjjjjjjjjddeeaccccc
+ccccccccccccchhppppppppppjjqqqjjjjjeeeaacccc
+cccccccccccchhhpppuuuupppqqqqqqqjjjeeeaacccc
+cccccccccccchhhopuuuuuuppqqqqqqqjjjeeecccccc
+ccaaccccccchhhhoouuuuuuuqvvvvvqqqjkeeecccccc
+caaaccccccchhhooouuuxxxuvvvvvvqqqkkeeecccccc
+aaaaaaaccchhhhooouuxxxxuvyyyvvqqqkkeeecccccc
+aaaaaaaccjjhooooouuxxxxyyyyyvvqqqkkeeecccccc
+aaaaaaccjjjooootuuuxxxxyyyyyvvqqkkkeeecccccc
+aaaaaacjjjooootttuxxxxxyyyyvvrrrkkkeeecccccc
+aaaaaacjjjoootttxxxEzzzzyyvvvrrrkkkfffcccccc
+aaccaacjjjoootttxxxxxyyyyyyvvvrrkkkfffcccccc
+cccccccjjjoootttxxxxyxyyyyyywvvrrkkkfffccccc
+aacccccjjjnnnttttxxxxyyyyyyywwwrrkkkfffccccc
+Sabaaacjjjnnnntttttxxyywwwwwwwwrrrlkfffccccc
+aaaaacccjjjnnnnnttttwwywwwwwwwrrrrllfffccccc
+aaaaccccjjjjinnnntttwwwwwsssrrrrrllllffccccc
+aaaaacccciiiiinnnntswwwwssssrrrrrlllfffccccc
+aaaaaaccccciiiinnnssswwsssssllllllllfffccccc
+aaccaacccccciiiinnsssssssmmllllllllfffaacccc
+aaccccccccccciiinnmsssssmmmmlllllgggffaacccc
+cccccccccccccciiimmmsssmmmmmgggggggggaaacccc
+aaaccccccccccciiimmmmmmmmmgggggggggaaacccccc
+aaacccccccccccciiimmmmmmmhhggggcaaaaaaaccccc
+aaacccccccccccciihhmmmmhhhhgccccccccaacccccc
+aaaccccccccccccchhhhhhhhhhhaaccccccccccccccc
+aaacccaaacccccccchhhhhhhhaaaaccccccccccccccc
+accccaaaacccccccccchhhhccccaaccccccccccaaaca
+cccccaaaacccccccccccaaaccccccccccccccccaaaaa
+ccccccaaacccccccccccaaacccccccccccccccccaaaa
+cccccccccccccccccccccccccccccccccccccccaaaaa