CaveGen.c

#include <stdlib.h>
#include <stdio.h>
#include <time.h>

struct TileMap{

    unsigned int Width,Height;

    int* Map;

};

struct TileMap* generateCave(
        unsigned int Width,
        unsigned int Height,
        unsigned int FP,        //Fill Percent
        unsigned int SL,        //Smooth level (must be 0-8)
        unsigned int HM         //Human made mode(may be -1,0,1)   -1 - digging, 0 - standart, 1 - building
        ){
    srand(time(0));
    struct TileMap*m;
    m=(struct TileMap*) malloc(sizeof(struct TileMap));
    m->Map=(int*) malloc(Width * Height * sizeof(int*));

    if(HM<-1)
        HM=-1;//normalize

    if(HM>1)
        HM=1;//normalize

    m->Height=Height;
    m->Width=Width;

    //random fill map
    for(unsigned int y=0;y<Height-1;y++)
        for(unsigned int x=0;x<Width-1;x++)
            if(y==0||x==0||y==Height-2||x==Width-2)
                m->Map[y*Width+x]=1;//wall arround Map
            else
                m->Map[y*Width+x]=(1+rand()%100<FP-(0.4f*FP*(HM)));

    for(unsigned int i=0;i<SL;i++)
        for(unsigned int y=1;y<Height-2;y++)
            for(unsigned int x=1;x<Width-2;x++)
            {
                int wall=0;
                for(unsigned int x1=x-1;x1<=x+1;x1++)
                    for(unsigned int y1=y-1;y1<=y+1;y1++)
                        if(x1!=x||y1!=y)
                            wall+=(m->Map[y1*Width+x1])?(1):(0);


                if(wall>4)
                    m->Map[y*Width+x]=1;
                else if(wall<4)
                    m->Map[y*Width+x]=0;
                else if(HM==-1)
                    m->Map[y*Width+x]=0;
                else if(HM==1)
                    m->Map[y*Width+x]=1;
            }
    return m;
}


void visualiseTileMap(struct TileMap*m){
    for(unsigned int y=0;y<m->Height;y++){
        for(unsigned int x=0;x<m->Width;x++){
            printf("%c",(m->Map[y*m->Width+x])?('#'):(' '));
        }
        printf("\n");
    }

}

int main(){
    struct TileMap* map;
    map = generateCave(160,50,65,6,-1);
    visualiseTileMap(map);
    return 0;
}