#include "stdio.h"
#include "stdlib.h"
#include "math.h"
#include "string.h"

#define WIDTH 600
#define HEIGHT 600
#define NMORPH 100
#define NSPLIT 7
#define ZSCALE 0.5
#define MAXLINE 100
#define MAXPOLY 100
#define PI 3.141592653589793238462643
#define TWOPI 6.283185307179586476925287
#define ABS(x) (x < 0 ? -(x) : (x))
#define MIN(x,y) (x < y ? x : y)
#define MAX(x,y) (x > y ? x : y)

#define CONST1 0.5
#define CONST2 0.1
#define CONST3 1.0

typedef struct {
   double x,y,z;
} XYZ;
typedef struct {
   double x,y;
} POINT2D;
typedef struct {
   POINT2D p1,p2;
} LINE2D;
typedef struct {
	double r,g,b;
} COLOUR;

void WriteStructure(POINT2D *,int,LINE2D *,int,char *);
int CreateGrid(XYZ ***,int);
int FreeGrid(XYZ ***,int);
int InsidePolygon(POINT2D *,int,POINT2D);
void WriteGeomGrid(XYZ **,int,char *,double,double);
void CopyGrid(XYZ **,XYZ **,int);
void CalcZBounds(XYZ **,int,double *,double *);
void WritePovray(XYZ **,int,char *,double,double);
void CalcUVX(POINT2D,POINT2D,POINT2D,POINT2D,POINT2D,POINT2D *);
double LineDist(POINT2D,POINT2D,POINT2D);
double LineLength(POINT2D,POINT2D);
void ReportRange(XYZ **,int);
COLOUR GetColour(double,double,double);
double Angle2D(double,double,double,double);