#ifndef GEOMETRY_HEADER
#include "geometry.h"
#endif

#ifndef STDIO_HEADER
#include <stdio.h>
#endif

#ifndef DCEL_HEADER
#define DCEL_HEADER

typedef struct halfEdge {
    struct halfEdge *previous;
    struct halfEdge *next;
    struct halfEdge *twin;
    int face;
    int edge;
} halfEdge_t;

typedef struct edge {
    halfEdge_t halfEdge;
} edge_t;

typedef struct face {
    halfEdge_t start;
} face_t;

vertex_t **readPolygon(vertex_t **vertices, FILE *polygonFile, \
    int *numVertices);
void freeVertices(vertex_t **vertices, int numVertices);

#endif