sigonasr2/AoC2022_Day12
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A* implemented!

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Co-authored-by: sigonasr2 <sigonasr2@gmail.com>
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sigonasr2, Sig, Sigo 2022-12-12 14:48:51 +00:00
parent fcdbb1e8b4
commit a7f729d41a
3 changed files with 33 additions and 34 deletions
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C++ProjectTemplate
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65
main.cpp
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@ -1,20 +1,31 @@
#define OLC_PGE_APPLICATION #include <vector>
#include "pixelGameEngine.h" #include <fstream>
#include "olcutils.h" #include <iostream>
#include <cmath>
using namespace olc; struct vi2d{
int x,y;
friend std::ostream&operator<<(std::ostream&out,vi2d&rhs){
out<<"("<<rhs.x<<","<<rhs.y<<")";
return out;
}
};
struct node{ struct node{
private:
char elevation='a'; char elevation='a';
public:
bool visited=false; bool visited=false;
std::vector<node*>connections; std::vector<node*>connections;
int myDist=INFINITY; int myDist=INFINITY;
int storedDist=INFINITY;
vi2d pos; vi2d pos;
node*parent=nullptr; node*parent=nullptr;
node(char elevation){ node(char elevation){
this->elevation=elevation; this->elevation=elevation;
}; };
char getElevation(){
return elevation=='S'?'a':elevation=='E'?'z'+1:elevation;
}
}; };
@ -26,7 +37,7 @@ node*endNode;
int main() int main()
{ {
std::ifstream file("testinput2"); std::ifstream file("input");
while (file.good()){ while (file.good()){
std::string line; std::string line;
std::getline(file,line); std::getline(file,line);
@ -48,18 +59,18 @@ int main()
std::cout<<"================"<<std::endl; std::cout<<"================"<<std::endl;
for (int y=0;y<grid.size();y++){ for (int y=0;y<grid.size();y++){
for (int x=0;x<grid[y].size();x++){ for (int x=0;x<grid[y].size();x++){
std::cout<<grid[y][x].elevation; std::cout<<grid[y][x].getElevation();
grid[y][x].pos={x,y}; grid[y][x].pos={x,y};
if (x>0){ if (x>0&&grid[y][x-1].getElevation()-1<=grid[y][x].getElevation()){
grid[y][x].connections.push_back(&grid[y][x-1]); grid[y][x].connections.push_back(&grid[y][x-1]);
} }
if (x<grid[y].size()-1){ if (x<grid[y].size()-1&&grid[y][x+1].getElevation()-1<=grid[y][x].getElevation()){
grid[y][x].connections.push_back(&grid[y][x+1]); grid[y][x].connections.push_back(&grid[y][x+1]);
} }
if (y>0){ if (y>0&&grid[y-1][x].getElevation()-1<=grid[y][x].getElevation()){
grid[y][x].connections.push_back(&grid[y-1][x]); grid[y][x].connections.push_back(&grid[y-1][x]);
} }
if (y<grid.size()-1){ if (y<grid.size()-1&&grid[y+1][x].getElevation()-1<=grid[y][x].getElevation()){
grid[y][x].connections.push_back(&grid[y+1][x]); grid[y][x].connections.push_back(&grid[y+1][x]);
} }
if (x==playerPos.x&&y==playerPos.y){ if (x==playerPos.x&&y==playerPos.y){
@ -76,37 +87,25 @@ int main()
std::vector<node*>searchNodes; std::vector<node*>searchNodes;
searchNodes.push_back(startNode); searchNodes.push_back(startNode);
startNode->myDist=0.0f;
while (searchNodes.size()>0){ while (searchNodes.size()>0){
node*currentNode=searchNodes.front(); node*currentNode=searchNodes.front();
if (currentNode==startNode){ if (currentNode->visited){
currentNode->myDist=pow(currentNode->pos.x-endNode->pos.x,2)+pow(currentNode->pos.y-endNode->pos.y,2); searchNodes.erase(searchNodes.begin());
continue;
} }
currentNode->visited=true; currentNode->visited=true;
if (currentNode->elevation=='S'){
currentNode->elevation='a'-1;
}
if (currentNode->elevation=='E'){
currentNode->elevation='z'+1;
}
for (int i=0;i<currentNode->connections.size();i++){ for (int i=0;i<currentNode->connections.size();i++){
node*neighbor=currentNode->connections[i]; node*neighbor=currentNode->connections[i];
if (neighbor==endNode){ if (!neighbor->visited){
//We can't go any higher. searchNodes.push_back(neighbor);
endNode->parent=currentNode;
break;
} }
if (neighbor->elevation-1<=currentNode->elevation){ float lowerGoal=currentNode->myDist+pow(neighbor->pos.x-currentNode->pos.x,2)+pow(neighbor->pos.y-currentNode->pos.y,2);
if (neighbor->parent==nullptr||currentNode->myDist<neighbor->storedDist){ if (lowerGoal<neighbor->myDist){
neighbor->parent=currentNode; neighbor->parent=currentNode;
neighbor->storedDist=currentNode->myDist; neighbor->myDist=lowerGoal;
neighbor->myDist=pow(neighbor->pos.x-endNode->pos.x,2)+pow(neighbor->pos.y-endNode->pos.y,2);
if (!neighbor->visited){
searchNodes.push_back(neighbor);
}
}
} }
} }
searchNodes.erase(searchNodes.begin());
} }
node*searchNode=endNode; node*searchNode=endNode;

2
sig
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@ -3,7 +3,7 @@ export AUTO_UPDATE=true
source utils/define.sh source utils/define.sh
define PROJECT_NAME "C++ProjectTemplate" define PROJECT_NAME "C++ProjectTemplate"
define CUSTOM_PARAMS "-std=c++17 -lX11 -lGL -lpthread -lpng -lstdc++fs -lpulse -lpulse-simple -I/usr/include/lua5.3" define CUSTOM_PARAMS "-std=c++17 -lX11 -lpthread -lpng -lstdc++fs -I/usr/include/lua5.3"
define LANGUAGE "C++" define LANGUAGE "C++"
source utils/main.sh source utils/main.sh