/*
  Greydon Foil
  5.21.04
*/

/* ppmRender.h */
#ifndef __ppmRender_h
#define __ppmRender_h

#include "vectorMath.h"

/* This structure is used by the system to hold the relevant information 
   about the current grid and all of the values in the grid */
typedef struct grid {
  int numCols;
  int numRows;
  int maxValue;
  int** values; /* col is the x-value of the 2-d array and row 
		 is the y-value */
} Grid;

/* This structure is used to hold the normal vectors for all points
   in the grid */
typedef struct normalGrid_t {
  point** values;
} normalGrid;

void adjustHeights(void);
Grid* readGrid(char* filename);
void findRatio(void);
void display2d(void);
void display3d(void);
void main_menu(int value);
void keypress2d(unsigned char key, int x, int y);
void keypress3d(unsigned char key, int x, int y);
void mouseFunction(int x, int y);
void mouseIdleFunction(int x, int y);
void initLighting(void);
void printInfo(Grid* inGrid);
void colorFunction(int heightR, int heightG, int heightB);
void initView(void);
void renderScene(void);
void specialKey(int key, int x, int y);
void findAllNormals(void);
void buildNormalGrid(void);

#endif