#include "grind.h"//this function generates a random map with few (<= 10%) not walkable cellsvoid generate_map(int map[][NUM_COLS]){	//init rand seed using current time	time_t t;	time(&t);	srand(t);	int i,k;	for(i = 0; i < NUM_ROWS; i++)	{		for(k = 0; k< NUM_COLS; k++)		{			//walkable	cell			if((rand() % 100) > 10)				map[i][k] = 1;			else			{				//first and last row and col are all walkable				if(k != 0 && i != 0 && k < NUM_COLS-1 && i < NUM_ROWS-1)					map[i][k] = 0;				else					map[i][k] = 1;			}		}	}}//this function draw a black/white map on screenvoid draw_map(SDL_Surface *surface, SDL_Rect grind, int map[][NUM_COLS]){	//counters	int i, k;	SDL_Color black = {0x00,0x00,0x00,0};	SDL_Color white = {0xFF,0xFF,0xFF,0};	SDL_Rect cell = {grind.x,grind.y,CELL_SIDE,CELL_SIDE};	for(i = 0; i < NUM_ROWS; i++)	{		for(k = 0; k < NUM_COLS; k++)		{			if(map[i][k])				draw_square(surface, &cell , black, white);			else				draw_square(surface, &cell , black, black);						//next col			cell.x += CELL_SIDE;		}				//next row		cell.y += CELL_SIDE;		cell.x = grind.x;	}}//this function llok for the first free cell starting from (0,0)void get_free_cell(int map[][NUM_COLS], cell_ind * ind){	int i,k;	for(i = 0; i < NUM_ROWS; i++)	{			for(k = 0; k < NUM_COLS; k++)			{					if(map[i][k])					{						ind->row = i;						ind->col = k;						return ;					}			}	}}//this function calculates the destination point for a robot that want to //move on a cellvoid dest_point(cell_ind dest_i, point * dest_p){	dest_p->y = (dest_i.row * CELL_SIDE) + GRIND_Y + ROBOT_DIST/2;	dest_p->x = (dest_i.col * CELL_SIDE) + GRIND_X + ROBOT_DIST/2;}//this functions updates a rectangle moving it toward a destination pointbool update_position(SDL_Rect * pos, point dest){	//orizzontal movement	if(dest.x > pos->x) 		pos->x += ROBOT_SPEED;	else if(dest.x < pos->x) 		pos->x -= ROBOT_SPEED;	//vertical movement	if(dest.y > pos->y) 		pos->y += ROBOT_SPEED;	else if(dest.y < pos->y) 		pos->y -= ROBOT_SPEED;				//check for arrival	if(dest.x == pos->x && dest.y == pos->y)		return true;	else		return false;}