AoC2022_Day17/main.cpp

#define OLC_PGE_APPLICATION
#include "pixelGameEngine.h"
#include "olcutils.h"
#include <cassert>

using namespace olc;

int main()
{
	std::ifstream file("input");
    std::vector<std::array<char,7>>playfieldRows;
    std::array<std::array<char,4>,4>piece{{
        {' ',' ',' ',' '},
        {' ',' ',' ',' '},
        {' ',' ',' ',' '},
        {' ',' ',' ',' '}}};
    vi2d piecePos={0,0};
    std::array<std::pair<std::array<std::array<char,4>,4>,vi2d>,5>pieces{{
        {{{{'#','#','#','#'},
          {' ',' ',' ',' '},
          {' ',' ',' ',' '},
          {' ',' ',' ',' '}}},{4,1}},
        {{{{' ','#',' ',' '},
          {'#','#','#',' '},
          {' ','#',' ',' '},
          {' ',' ',' ',' '}}},{3,3}},
        {{{{' ',' ','#',' '},
          {' ',' ','#',' '},
          {'#','#','#',' '},
          {' ',' ',' ',' '}}},{3,3}},
        {{{{'#',' ',' ',' '},
          {'#',' ',' ',' '},
          {'#',' ',' ',' '},
          {'#',' ',' ',' '}}},{1,4}},
        {{{{'#','#',' ',' '},
          {'#','#',' ',' '},
          {' ',' ',' ',' '},
          {' ',' ',' ',' '}}},{2,2}},}};
    int currentPiece=0;
    int topRow=0;
    int jetMarker=0;
    while (file.good()){
        std::string line;
        std::getline(file,line);
        if (line.length()>0){
            std::cout<<line<<std::endl;
            for (int i=0;i<2022;i++){
                bool pieceLanded=false;
                std::pair<std::array<std::array<char,4>,4>,vi2d>piece=pieces[currentPiece];
                currentPiece=(currentPiece+1)%5;
                int newRows=3-topRow+piece.second.y;
                //std::cout<<"Adding "<<newRows<<" rows..."<<std::endl;
                if (newRows>0){
                    for (int j=0;j<newRows;j++){
                        std::array<char,7>newRow={' ',' ',' ',' ',' ',' ',' '};
                        playfieldRows.insert(playfieldRows.begin(),newRow);
                        topRow++;
                    }
                    piecePos={2,0};
                } else {
                    piecePos={2,topRow-3-piece.second.y};
                }
                while (!pieceLanded) {
                    char direction=line[jetMarker];
                    //std::cout<<direction;
                    switch (direction){
                        case '<':{
                            if (piecePos.x>0){
                                for (int yy=0;yy<piece.second.y;yy++){
                                    for (int xx=0;xx<piece.second.x;xx++){
                                        if (piece.first[yy][xx]!=' '&&playfieldRows[piecePos.y+yy][piecePos.x+xx-1]=='#'){
                                            //std::cout<<"Collision - Ignore Move Left"<<std::endl;
                                            goto resolveX;
                                        }
                                    }
                                }
                                //std::cout<<"Move left"<<std::endl;
                                piecePos.x--;
                            } else {
                                //std::cout<<"Ignore Move left"<<std::endl;
                            }
                        }break;
                        case '>':{
                            if (piecePos.x+piece.second.x<7){
                                for (int yy=0;yy<piece.second.y;yy++){
                                    for (int xx=0;xx<piece.second.x;xx++){
                                        if (piece.first[yy][xx]!=' '&&playfieldRows[piecePos.y+yy][piecePos.x+xx+1]=='#'){
                                            //std::cout<<"Collision - Ignore Move Right"<<std::endl;
                                            goto resolveX;
                                        }
                                    }
                                }
                                //std::cout<<"Move right"<<std::endl;
                                piecePos.x++;
                            } else {
                                //std::cout<<"Ignore Move Right"<<std::endl;
                            }
                        }break;
                        default:{
                            std::cout<<"An invalid character! '"<<direction<<"'"<<std::endl;
                            assert(false);
                        }
                    }
                    resolveX:
                    bool landed=false;
                    if (piecePos.y+piece.second.y<playfieldRows.size()){
                        for (int yy=0;yy<piece.second.y;yy++){
                            for (int xx=0;xx<piece.second.x;xx++){
                                if (piece.first[yy][xx]!=' '&&playfieldRows[piecePos.y+yy+1][piecePos.x+xx]=='#'){
                                    landed=true;
                                    goto resolveY;
                                }
                            }
                        }
                    } else {
                        landed=true;
                    }
                    resolveY:
                    if (landed){
                        for (int yy=0;yy<piece.second.y;yy++){
                            for (int xx=0;xx<piece.second.x;xx++){
                                if (piece.first[yy][xx]=='#'){
                                    playfieldRows[piecePos.y+yy][piecePos.x+xx]=piece.first[yy][xx];
                                }
                            }
                        }
                        if (piecePos.y<topRow){
                            topRow=piecePos.y;
                        }
                        pieceLanded=true;
                    } else {
                        piecePos.y++;
                    }
                    jetMarker=(jetMarker+1)%line.length();
                    //std::cout<<"jetMarker is now "<<jetMarker<<std::endl;
                    /*for (int y=0;y<playfieldRows.size();y++){
                        std::cout<<"  ";
                        for (int x=0;x<9;x++){
                            if (x==0||x==8) {
                                std::cout<<"|";
                            } else {
                                if (x-1>=piecePos.x&&y>=piecePos.y&&x-1<piecePos.x+piece.second.x&&y<piecePos.y+piece.second.y){
                                    std::cout<<piece.first[y-piecePos.y][x-1-piecePos.x];
                                } else {
                                    std::cout<<playfieldRows[y][x-1];
                                }
                            }
                        }
                        std::cout<<std::endl;
                    }
                    std::cout<<"=================="<<std::endl;*/
                }
                /*std::cout<<"=================="<<std::endl;
                for (int y=0;y<playfieldRows.size();y++){
                    for (int x=0;x<9;x++){
                        if (x==0||x==8) {
                            std::cout<<"|";
                        } else {
                            std::cout<<playfieldRows[y][x-1];
                        }
                    }
                    std::cout<<std::endl;
                }*/
            }
            std::cout<<std::endl;
            std::cout<<"The tower is "<<playfieldRows.size()-topRow<<" tall!"<<std::endl;
        }
    }

	return 0;
}