int main()
{
try
{
ifstream fin;
// Read the maze from the file.
string fileName = "maze0.txt";
fin.open(fileName.c_str());
if (!fin)
{
cerr << "Cannot open " << fileName << endl;
exit(1);
}
maze m(fin);
fin.close();
m.print(m.numRows()-1,m.numCols()-1,0,0);
Graph g(m.numRows() * m.numCols()); // initializes the graph as the size of the maze
m.mapMazeToGraph(g); // graph g is created from the maze
Graph::vertex_descriptor startOfMaze = vertex(0, g); // beginning vertex of the maze
pair<int, int> endOfMaze(m.numRows() - 1, m.numCols() - 1); // initializes the end of the maze
int totalVertices = num_vertices(g); // gets total # of vertices
stack<Graph::vertex_descriptor> testPath; // create path that can be used to for print path
clearVisited(g); // clears visited vertices
testPath = findPathDFSRecursively(g, startOfMaze, endOfMaze); // gets a path to complete the maze
m.printPath(totalVertices, testPath, g); // prints path using DFS
system("cls");
clearVisited(g);
testPath = findShortestPathDFSRecursively(g, startOfMaze, endOfMaze); // gets the shortest path to complete the maze
m.printPath(totalVertices, testPath, g); // prints shortest path using DFS
system("cls");
clearVisited(g);
testPath = findPathDFSStack(g,startOfMaze,endOfMaze); // gets path using DFS stack logic
m.printPath(totalVertices, testPath, g); // prints path using DFS with a stack
system("cls");
clearVisited(g);
testPath = findPathBFS(g, startOfMaze, endOfMaze); // BFS finds shortest path from start to every node
m.printPath(totalVertices, testPath, g); // prints shortest path using BFS
// cout << g << endl; may be used in later implementations but unnecessary for this project
}
catch (indexRangeError &ex)
{
cout << ex.what() << endl;
exit(1);
}
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int BFS(Graph* g, Vertex* source, Vertex* destination)
{
/* FIXME you will write this */
struct cirListDeque *que = malloc(sizeof(struct cirListDeque));
struct Vertex *cur = malloc(sizeof(struct Vertex));
clearVisited(g);
initCirListDeque(que);
addFrontCirListDeque(que, source);
while(!isEmptyCirListDeque(que)){
cur = frontCirListDeque(que);
removeFrontCirListDeque(que);
if(cur == destination){
return 1;
}
else if(!cur->isVisited){
int i;
for(i=0; i<cur->numNeighbors; ++i){
if(!cur->neighbors[i]->isVisited){
addBackCirListDeque(que, cur->neighbors[i]);
cur->neighbors[i]->isVisited = 1;
}
}
cur->isVisited =1;
}
}
return 0;
}
string Maze::dispayMaze()
{
string mazeDsp = "";
string* maze = new string[height*3];
for (int y = 0; y < height*3;y++)
{
maze[y] = "";
// populate the string
for (int x = 0; x < width * 3;x++)
maze[y] += "#";
maze[y] += "\n";
}
clearVisited(root);
buildCell(*root, maze);
// append the lines into one string
for (int y = 0; y < height * 3; y++)
mazeDsp += maze[y];
delete[] maze;
maze = 0;
return mazeDsp;
}
unsigned int sum(unsigned int lowerBound, unsigned int upperBound, int row, int col){
clearVisited();
return recursiveSum(lowerBound, upperBound, row, col);
}
/**
* Determines if there is a path from the source to the destination using an
* iterative breadth-first search starting at the source.
*
* Remember to call clearVisited() before starting the search.
*
* @param graph
* @param source
* @param destination
* @return 1 if there is a path, 0 otherwise.
*/
int bfsIterative(Graph* graph, Vertex* source, Vertex* destination)
{
clearVisited(graph);
int i;
int found = 0;
// queue
Deque *collection = malloc(sizeof(Deque));
Vertex *current;
// initialize queue and add source
collection = dequeNew();
dequePushBack(collection, source);
// search until destination is found or we run out of edges
while (!(found == 1) && !dequeIsEmpty(collection))
{
// current vertex is the one first added to collection
current = dequeFront(collection);
dequePopFront(collection);
current->isVisited = 1;
// if the current node is the destination, we're done
if (current == destination)
found = 1;
// otherwise add its neighbors to the queue
else
{
for (i = 0; i < current->numNeighbors; ++i)
if (!(current->neighbors[i]->isVisited))
dequePushBack(collection, current->neighbors[i]);
}
}
// clean things up
clearVisited(graph);
dequeClear(collection);
free(collection);
// return if path was found
return found;
}
/*
* Method used to test a maze to make sure all cells
* are reachable.
*
*/
bool Maze::allCellsReachable() {
int r, c;
int rows = getRows();
int cols = getCols();
// Set all cells to a unique value (starting with 1) and unvisit them
clearVisited();
for (r=0; r<rows; r++) {
for (c=0; c<cols; c++) {
getCell(r,c)->setValue(r*cols+c+1);
}
}
// Now keep reducing connected cells to lowest value.
// If all are connected, then all cells should end up as 1.
bool changed = true, modify = false;
vector<direction> lst;
int min, v = 0, i;
while (changed) {
changed = false;
for (r=0; r<rows; r++) {
for (c=0; c<cols; c++) {
modify = false;
Cell* cell = getCell(r,c);
getConnectedNeighbors(cell, lst);
// Get minimum value for connected cells
min = v = cell->getValue();
for (i=0; i<(int)lst.size(); i++) {
v = getAdjacentCell(cell, lst.at(i))->getValue();
if (v < min) {
modify = true;
min = v;
}
}
// Change values in connected cells if needed
if (modify) {
changed = true;
cell->setValue(min);
for (i=0; i<(int)lst.size(); i++) {
getAdjacentCell(cell, lst.at(i))->setValue(min);
}
}
}
}
}
// Now find out if all cells have value 1 (all connected)
for (r=0; r<rows; r++) {
for (c=0; c<cols; c++) {
if (getCell(r,c)->getValue() != 1) return false;
}
}
return true;
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int BFS(Graph* g, Vertex* source, Vertex* destination)
{
/* FIXME you will write this */
//use queue
int contains = 0;
struct cirListDeque *queue = malloc(sizeof(struct cirListDeque));
initCirListDeque(queue);
clearVisited(g);
struct Vertex *current;
current = source;
while(current != destination)
{
if(current->isVisited == 0)
{
current->isVisited = 1;
for(int x = 0; x < current->numNeighbors; x++)
{
if(current->neighbors[x]->isVisited == 0)
{
addBackCirListDeque(queue, current->neighbors[x]);
}
}
if(!isEmptyCirListDeque(queue))
{
current = frontCirListDeque(queue);
removeFrontCirListDeque(queue);
}
else
return contains;
}
else
{
if(!isEmptyCirListDeque(queue))
{
current = frontCirListDeque(queue);
removeFrontCirListDeque(queue);
}
else
return contains;
}
}
if(current == destination)
{contains = 1;}
removeAllCirListDeque(queue);
return contains;
}
void Maze::clearVisited(MazeNode * node)
{
if (node == 0)
return;
// clear the current node
node->clearVisited();
// traverse all visited node
for (int index = 0; index < node->getNumOfConnections(); index++)
{
if (node->getNode(index) != 0 && node->getNode(index)->isVisited())
clearVisited(node->getNode(index));
}
}
// FIXME(mvujovic): We do not know if the execution time of built-in operations like sin, pow, etc.
// can vary based on the value of the input arguments. If so, we should restrict those as well.
void RestrictFragmentShaderTiming::enforceRestrictions(const TDependencyGraph& graph)
{
mNumErrors = 0;
// FIXME(mvujovic): The dependency graph does not support user defined function calls right now,
// so we generate errors for them.
validateUserDefinedFunctionCallUsage(graph);
// Starting from each sampler, traverse the dependency graph and generate an error each time we
// hit a node where sampler dependent values are not allowed.
for (auto samplerSymbol : graph.samplerSymbols())
{
clearVisited();
samplerSymbol->traverse(this);
}
}
unsigned int count(unsigned int lowerBound, unsigned int upperBound){
clearVisited();
int sum = 0, _count = 0;
for (int rows = 0 ; rows <= _rows; rows++){
for(int cols = 0; cols <= _cols; cols++){
sum = recursiveSum(lowerBound, upperBound, rows, cols);
if (sum > 0)
_count++;
}
}
return _count;
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int BFS(Graph* g, Vertex* source, Vertex* destination){
/* FIXME you will write this */
/* create and initialize circular list deque pointer */
struct cirListDeque *stack = malloc(sizeof(struct cirListDeque));
initCirListDeque(stack);
/*/ create vertex pointer and clear visited nodes */
struct Vertex *temp = source;
clearVisited(g);
/* add to front */
addFrontCirListDeque(stack, temp);
/* if not empty, use BFS */
while(!isEmptyCirListDeque(stack)){
/*remove back(top) value */
temp = backCirListDeque(stack);
removeBackCirListDeque(stack);
/* check if visited, mark, and return true */
if(!temp -> isVisited){
temp -> isVisited = 1;
}
if(temp == destination){
removeAllCirListDeque(stack);
return 1;
}
/* check is the neighboring nodes have been visited. add to stack if not */
for(int i = 0; i < temp->numNeighbors; i++){
if(!temp->neighbors[i]->isVisited){
addFrontCirListDeque(stack, temp->neighbors[i]);
}
}
}
return 0;
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int DFS(Graph* g, Vertex* source, Vertex* destination){
/* FIXME you will write this */
struct cirListDeque *stack = malloc(sizeof(struct cirListDeque));
initCirListDeque(stack);
struct Vertex *temp = source;
clearVisited(g);
/* add to the front of the circular list deque */
addFrontCirListDeque(stack, temp);
/*if it isn't empty, use DFS */
while(!isEmptyCirListDeque(stack)){
temp = backCirListDeque(stack);
removeBackCirListDeque(stack);
/* check if visited, mark if it hasn't been visited */
if(!temp -> isVisited){
temp ->isVisited = 1;
}
if(temp == destination){
/* if you reach the destination, remove from the list to free memory, return 1 */
removeAllCirListDeque(stack);
return 1;
}
/* check is the neighboring nodes have been visited. add to stack if not */
for(int i = 0; i < temp->numNeighbors; i++){
if(!temp->neighbors[i] -> isVisited){
addFrontCirListDeque(stack, temp->neighbors[i]);
}
}
}
return 0;
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int BFS(Graph* g, Vertex* source, Vertex* destination)
{
/* FIXME you will write this */
clearVisited(g);
cirListDeque queue;
Vertex *currentVertex;
int i;
initCirListDeque(&queue);
addBackCirListDeque(&queue, source);
while(!isEmptyCirListDeque(&queue))
{
currentVertex = frontCirListDeque(&queue);
removeFrontCirListDeque(&queue);
if(currentVertex->label == destination->label)
return 1;
else
{
if(currentVertex->isVisited == 0)
currentVertex->isVisited = 1;
for (i = 0; i < currentVertex->numNeighbors; i++)
{
if(currentVertex->label == destination->label)
return 1;
else
{
if(currentVertex->neighbors[i]->isVisited == 0)
addBackCirListDeque(&queue, currentVertex->neighbors[i]);
}
}
}
}
return 0;
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int BFS(Graph* g, Vertex* source, Vertex* destination)
{
/* DONE you will write this */
/* use a queue */
clearVisited(g);
cirListDeque *queue = malloc(sizeof(cirListDeque));
initCirListDeque(queue);
Vertex *current = source;
int i;
for (i = 0; i < current->numNeighbors; i++) {
addFrontCirListDeque(queue, current->neighbors[i]);
}
current->isVisited = 1;
while (! isEmptyCirListDeque(queue)) {
current = backCirListDeque(queue);
removeBackCirListDeque(queue);
if (current == destination) {
return 1;
}
current->isVisited = 1;
for (i = 0; i < current->numNeighbors; i++) {
if (! current->neighbors[i]->isVisited) {
addFrontCirListDeque(queue, current->neighbors[i]);
}
}
}
return 0;
}
int DFSRecursive(Graph* g, Vertex* source, Vertex* destination)
{
clearVisited(g);
return DFSRecursiveHelper(g, source, destination);
}
/**
* Determines if there is a path from the source to the destination using a
* recursive depth-first search starting at the source.
*
* You can use this function to test the correctness of the others.
*
* @param graph
* @param source
* @param destination
* @return 1 if there is a path, 0 otherwise.
*/
int dfsRecursive(Graph* graph, Vertex* source, Vertex* destination)
{
clearVisited(graph);
return DfsRecursiveHelper(graph, source, destination);
}
/* This function should return a boolean (encoded as an int) indicating
* whether or not a path exists between the argument vertices.
* param: g Graph to perform the search in
* param: source Vertex to originate the search from
* param: destination Vertex to stop the search from (if it is found)
* ret: boolean indicating whether or not a path exists
*/
int DFS(Graph* g, Vertex* source, Vertex* destination)
{
/* FIXME you will write this */
/* DFSRecursive (g, source, destination) */
assert( g != NULL );
assert( source != NULL );
assert( destination != NULL );
clearVisited(g);
/* printf("Searching for %c from %c\n",destination->label,source->label); */
cirListDeque stack; /* a stack can be a special instance of deque */
/* can't use a pointer for 'stack' because there's nothing for it to point at */
Vertex* current;
int i; /* C99 isn't included on this assignment for some reason */
initCirListDeque(&stack);
addBackCirListDeque(&stack,source); /* push vertex source to top of stack */
/* printf("pushed %c\n",source->label); */
while( !isEmptyCirListDeque(&stack) ) /* loop until &stack is empty */
{
/* printf("(SOL) current stack: "); */
/* printCirListDeque(&stack); */
/* printf("\n"); */
current = backCirListDeque(&stack); /* pop vertex from &stack */
removeBackCirListDeque(&stack);
/* printf("removed %c\n", current->label); */
/* printf("current->label = %c\n",current->label); */
if ( current->label == destination->label )
{
/* printf("found %c\n",destination->label); */
return 1;
}
else
{
if ( current->isVisited == 0 ) /* mark as visited if not already */
{
current->isVisited = 1;
/* printf("marked %c as visited\n",current->label); */
}
else
{
/* printf("Skipping %c because it visited already.\n",current->label); */
}
/* printf("checking %d neighbors\n",current->numNeighbors); */
for ( i = 0; i < current->numNeighbors; i++ ) /* push neighbors if necessary */
{
if ( current->label == destination->label )
{
/* printf("found %c\n",destination->label); */
return 1;
}
else
{
if ( current->neighbors[i]->isVisited == 0 )
{
addBackCirListDeque( &stack,current->neighbors[i] );
/* printf("pushed %c\n",current->neighbors[i]->label); */
}
/* else */
/* printf("Skipping %c because it visited already.\n",current->neighbors[i]->label); */
}
}
}
}
return 0;
}
Maze::~Maze()
{
clearVisited(root);
destroyMaze(root);
}