Maze* MazeGame::CreateMaze(MazeFactory& factory) {
Maze* m = factory.MakeMaze();
Room* r1 = factory.MakeRoom(1);
Room* r2 = factory.MakeRoom(2);
Door* d = factory.MakeDoor(r1, r2);
m->AddRoom(r1);
m->AddRoom(r2);
r1->SetSide(North, factory.MakeWall());
r1->SetSide(East, d);
r1->SetSide(South, factory.MakeWall());
r1->SetSide(West, factory.MakeWall());
r2->SetSide(North, factory.MakeWall());
r2->SetSide(East, factory.MakeWall());
r2->SetSide(South, factory.MakeWall());
r2->SetSide(West, d);
return m;
}
void expandSuccessors(Node c)
{
int i,d,g,h;
Node t;
P_II jp;
V_PII nbs=neighbourPrune(c);
for (i=0; i<nbs.size(); i++)
{
jp=checkJump(nbs[i],c.pos);
if (jp.first != -1)
{
if (mazer.isInVis(jp) == true)
continue;
d=abs(jp.first-c.pos.first)+abs(jp.second-c.pos.second);
g=c.g+d;
if (mazer.isInQue(jp) == false || g < mem_g[jp.first][jp.second])
{
mem_g[jp.first][jp.second]=g;
t.g=g;
h=abs(jp.first-end.first)+abs(jp.second-end.second);
t.f=t.g+h;
t.pos=jp;
// printf("%d %d %d %d %d %d\n",t.pos.first,t.pos.second,t.parent.first,t.parent.second,c.pos.first,c.pos.second);
t.parent=c.pos;
if (mazer.isInQue(jp) == false)
{
path[jp.first][jp.second]=c.pos;
pri_List.push(t);
mazer.pushQue(t.pos);
}
else
{
pri_List.update(t);
}
}
}
}
}
void onIdle() {
int elapsedTime = glutGet(GLUT_ELAPSED_TIME) - lastUpdate;
//elapsedTime = (int) (elapsedTime * 0.5f); //slow down
//if (elapsedTime < 5) return;
if (!paused) {
// FPS COUNTER //
fpsCounter[0] += elapsedTime;
fpsCounter[1]++;
if (fpsCounter[0] > 1000) {
//system("cls");
cout << "FPS: " << 1000 / (fpsCounter[0] / fpsCounter[1]) << endl;
fpsCounter[0] = fpsCounter[1] = 0;
}
// FPS COUNTER //
cams.update(elapsedTime, &pacman);
int pacmanDeathTime = maze.getPacmanDeathTime();
if (!pacmanDeathTime) { //pacman is alive
pacmanIsAlive = 1;
pacman.update(elapsedTime, &maze);
maze.eatBallAt(pacman.getPosX(), pacman.getPosY());
ghosts.update(elapsedTime, pacman.getPosX(), pacman.getPosY(), &maze);
}
else {
if (pacmanDeathTime + 6000 < glutGet(GLUT_ELAPSED_TIME)) {
//pacman.onBirth();
pacman = Pacman();
ghosts = Ghosts();
maze.onPacmanBirth();
}
else {
if (pacmanIsAlive) {
pacmanIsAlive = 0;
particles.start(pacman.getPosX(), pacman.getPosY());
}
particles.update(elapsedTime);
}
}
glutPostRedisplay();
}
lastUpdate = glutGet(GLUT_ELAPSED_TIME);
}
void ColoredCubeApp::reloadLevel()
{
currentKeys = 0;
flashLightObject.getBattery();
//add in the maze reset function
Dimension d;
d.x=20;
d.z = 20;
maze.init(d,mfxWVPVar,mfxWorldVar,md3dDevice);
maze.build();
/*maze.setTex(mfxDiffuseMapVar,mfxSpecMapVar,L"brickwork-texture.jpg",L"brickwork-bump-map.jpg");
maze.setCeilTex(mfxDiffuseMapVar,mfxSpecMapVar,L"13.free-brick-textures.jpg",L"brickwork-bump-map.jpg");
maze.setFloorTex(mfxDiffuseMapVar,mfxSpecMapVar,L"carpet_diffuse.jpg",L"brickwork-bump-map.jpg");*/
for(int i = 0; i < numLightObjects; i++)
{
Location l;
l.x = rand()%mazeX;
l.z = rand()%mazeZ;
auto spot = maze.cellToPx(l);
lamps[i].setPosition(Vector3(spot.x,5,spot.z));
}
for(int i = 0; i < totalKeys; i++)
{
Location l;
l.x = rand()%mazeX;
l.z = rand()%mazeZ;
auto spot = maze.cellToPx(l);
keyObject[i].setPosition(Vector3(spot.x,-1,spot.z));
keyObject[i].setActive();
}
for(int i = 0; i < numBatteries; i++)
{
Location l;
l.x = rand()%mazeX;
l.z = rand()%mazeZ;
auto spot = maze.cellToPx(l);
batteries[i].setPosition(Vector3(spot.x,-1,spot.z));
batteries[i].setActive();
}
}
int findPath()
{
init();
Node s=Node(sta,0,0,make_pair(-1,-1)),tmp;
pri_List.push(s);
mazer.pushQue(s.pos);
while (!pri_List.empty())
{
tmp=pri_List.top();
printf("%d %d %d %d %d\n",tmp.pos.first,tmp.pos.second,tmp.parent.first,tmp.parent.second,tmp.f);
mazer.pushVis(tmp.pos);
pri_List.pop();
if (tmp.pos == end)
{
backtrace(end.first,end.second);
return 1;
}
expandSuccessors(tmp);
}
return 0;
}
void onDisplay(void) {
// cams.projection(winW, winH);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
cams.look();
lights.display(&pacman);
//draw stuff
maze.draw();
if (!maze.getPacmanDeathTime()) { //pacman is alive
pacman.draw();
}
else particles.draw();
mazeFloor.draw();
ghosts.draw();
hud.draw(winW, winH, &maze);
glFlush();
}
void Rat::scurry(double dt, Maze &maze)
{
double radians = mDegrees * M_PI / 180;
dx = cos(radians) * dt * SCURRY_SPEED;
dy = sin(radians) * dt * SCURRY_SPEED;
// double dz
if (maze.isSafe(mX+dx, mY+dy, mRadius))
{
mX += dx;
mY += dy;
}
else if (maze.isSafe(mX, mY+dy, mRadius))
{
mY += dy;
}
else if (maze.isSafe(mX+dx, mY, mRadius))
{
mX += dx;
}
}
void Animate()
{
if (direction != 0){
double step_limit = 60;
static double step = 0;
m_center = glm::vec3(glm::translate(glm::mat4(1.0f), glm::vec3(0, direction * (1 / step_limit) * 4, 0))*glm::vec4(m_center, 1));
m_eye = glm::vec3(glm::translate(glm::mat4(1.0f), glm::vec3(0, direction * (1 / step_limit) * 4, 0))*glm::vec4(m_eye, 1));
step++;
if (step >= step_limit) {
step = 0;
cur_layer += direction;
if (direction == 1) M.NextLayer();
else M.PreviousLayer();
direction = 0;
}
else {
DrawElevator(step,step_limit);
}
}
}
void test_KShortestPath(const char *filename)
{
Maze field;
field.loadFromFile(filename);
//field.loadFromArray(mazeData_66test);
ShortestPath path(field);
path.calcKShortestDistancePath(IndexVec(0,0), MAZE_GOAL_LIST, 5, false);
int cnt = 0;
for (auto &p : path.getKShortestDistancePath()) {
cnt++;
printf("path#%d length %lu\n", cnt, p.size());
bool route[MAZE_SIZE][MAZE_SIZE] = {false};
for (auto &index : p) {
route[index.y][index.x] = true;
}
field.printWall(route);
}
printf("found %lu route\n", path.getKShortestDistancePath().size());
}
Maze* MazeGame::CreateMaze(MazeFactory& factory) {
Maze* aMaze = factory.MakeMaze();
Room* r1 = factory.MakeRoom(1);
Room* r2 = factory.MakeRoom(2);
Door* aDoor = factory.MakeDoor(r1, r2);
aMaze->AddRoom(r1);
aMaze->AddRoom(r2);
r1->SetSide(North, factory.MakeWall());
r1->SetSide(East, aDoor);
r1->SetSide(South, factory.MakeWall());
r1->SetSide(West, factory.MakeWall());
r2->SetSide(North, factory.MakeWall());
r2->SetSide(East, factory.MakeWall());
r2->SetSide(South, factory.MakeWall());
r2->SetSide(West, aDoor);
return aMaze;
}
int main(int argc, char *argv[])
{
Maze maze;
if (argc != 2)
{
cout << "Must supply 1 argument to this program\n";
return 0;
}
maze.loadMaze(argv[1]);
if (!maze.isValid())
{
cout << "Unable to load maze " << argv[1] << "\n";
exit(0);
}
maze.calculatePath();
maze.printMaze();
exit(0);
}
void test_Agent(const char *filename)
{
Maze field;
Maze mazeInRobot;
field.loadFromFile(filename);
//field.loadFromArray(mazeData_66test);
Agent agent(mazeInRobot);
IndexVec cur(0,0);
while(1) {
bool pos[MAZE_SIZE][MAZE_SIZE] = {false};
pos[cur.y][cur.x] = true;
mazeInRobot.printWall(pos);
agent.update(cur, field.getWall(cur));
if (agent.getState() == Agent::FINISHED) break;
Direction dir = agent.getNextDirection();
for (int i=0;i<4;i++) {
if (dir[i]) cur += IndexVec::vecDir[i];
}
usleep(1000000/10);
}
agent.caclRunSequence(true);
bool route[MAZE_SIZE][MAZE_SIZE] = {false};
for (auto &index : agent.getShortestPath()) {
route[index.y][index.x] = true;
}
mazeInRobot.printWall(route);
}
int main(int argc, char** argv)
{
Maze* maze;
MazeGame game;
StandardMazeBuilder builder;
CountingMazeBuilder countBuilder;
game.CreateMaze(builder);
maze = builder.GetMaze();
game.CreateMaze(countBuilder);
cout << "room size in maze : " << maze->RoomSize() << endl;
int roomNum, doorNum;
countBuilder.GetCounts(roomNum,doorNum);
cout << "room Num : " << roomNum << " door Num: " << doorNum << endl;
}
/**
* Verifies that cells in a grid can have their state set.
* @params pTestData - test object to store the maze in so it
* will get cleaned up in all cases.
* @returns error string if there was an error
*/
string MazeTest::TestSetCellState(TestUnit::tTestData* pTestData) {
Maze* pMaze = (Maze*)pTestData->testObj;
Maze::tCoord chg1 = Maze::tCoord(0, 0, 0);
Maze::tCoord chg2 = Maze::tCoord(5, 3, 1);
Maze::tCoord chg3 = Maze::tCoord(9, 4, 6);
Maze::tCoord noChg = Maze::tCoord(2, 2, 2);
// Update the cells, start, end, and inner item
if (!pMaze->updateCell(chg1, Maze::CELL_SOLID) ||
!pMaze->updateCell(chg2, Maze::CELL_OCCUPIED) ||
!pMaze->updateCell(chg3, Maze::CELL_EXIT)) {
return "Failed to update valid cell in maze";
}
Maze::tGrid* pGrid = pMaze->getGrid();
// Verify the changes only occred where desired
Maze::tCell* cell = pGrid->at(noChg);
if (cell->state != Maze::CELL_EMPTY) {
return "Cell state change when it wasn't supposed to.";
}
// Verify changes
cell = pGrid->at(chg1);
if (cell->state != Maze::CELL_SOLID) {
return "Unable to set cell to solid state.";
}
cell = pGrid->at(chg2);
if (cell->state != Maze::CELL_OCCUPIED) {
return "Unable to set cell to occupied state.";
}
cell = pGrid->at(chg3);
if (cell->state != Maze::CELL_EXIT) {
return "Unable to set cell to exit state.";
}
return "";
}
Maze* MazeGame::CreateMaze() {
Maze* aMaze = MakeMaze();
Room* r1 = MakeRoom(1);
Room* r2 = MakeRoom(2);
Door* theDoor = MakeDoor(r1, r2);
aMaze->AddRoom(r1);
aMaze->AddRoom(r2);
r1->SetSide(North, MakeWall());
r1->SetSide(East, theDoor);
r1->SetSide(South, MakeWall());
r1->SetSide(West, MakeWall());
r2->SetSide(North, MakeWall());
r2->SetSide(East, MakeWall());
r2->SetSide(South, MakeWall());
r2->SetSide(West, theDoor);
return aMaze;
}
bool search(Maze &maze,set<pointT> &includePoint,pointT current,pointT exit){
pointT around;
includePoint.insert(current);
int i=0;
while(i<4){
around=current;
switch(i){
case 0:
around.col--;
break;
case 1:
around.row--;
break;
case 2:
around.col++;
break;
default:
around.row++;
}
//判断该点合法
if(maze.pointInBounds(around)&&!maze.isWall(current,around)&&includePoint.count(around)==0){
if(around==exit){
cout<<"get it"<<endl;
maze.drawMark(around,"Red");
return true;
}
else{
bool flag=search(maze,includePoint,around,exit);
if(flag){
maze.drawMark(around,"Red");
return true;
}
}
}
i++;
}
return false;
}
// This callback function gets called by the Glut
// system whenever it decides things need to be redrawn.
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
if (current_view == perspective_view) {
glEnable(GL_DEPTH_TEST);
glLoadIdentity();
gluLookAt(-3,-3,7, 3,3,0, 0,0,1);
}
else if (current_view == top_view){
glDisable(GL_DEPTH_TEST);
glLoadIdentity();
}
else if (current_view == rat_view){
glEnable(GL_DEPTH_TEST);
glLoadIdentity();
double z_level = .25;
double x = gRat.getX();
double y = gRat.getY();
//problem with dx and dy
double dx = gRat.getdX();
double dy = gRat.getdY();
//double at_x = x + dx;
//double at_y = y + dy;
double at_x =gRat.getNextX() ;
double at_y =gRat.getNextY() ;
double at_z = z_level;
//std::cout<<dx<<" "<<at_x<<"----"<<dy<<" "<<at_y<<std::endl;
gluLookAt(x,y,z_level, at_x, at_y, at_z, 0,0,1);
//gluLookAt(x,y,z_level, 360, 360, at_z, 0,0,1);
}
gMaze.Draw(current_view);
if(gMiddleButtonDown) {
gRat.Scuttle(gMaze);
glutPostRedisplay();
}
if(gLeftButtonDown){
gRat.SpinLeft();
glutPostRedisplay();
}
if(gRightButtonDown){
gRat.SpinRight();
glutPostRedisplay();
}
gRat.Draw(current_view);
glutSwapBuffers();
}
double Arena::runSimulation(Maze& maze, Robot& r) {
//reset maze
maze.clearVisited();
maze.clearValues();
//set needed values after reset
Cell* curCell = maze.getStartCell();
robotOrientation = direction::SOUTH;
unsigned int move;
double score;
//while the robot is not in the same cell facing the same direction
while (!repeat(robotOrientation, curCell->getValue()) && !(curCell == maze.getEndCell())) {
//set current cell to visited and update it's value
curCell->setVisited();
curCell->setValue(curCell->getValue() + robotOrientation);
//send the robot the environment and get it's next move
move = r.getMove(getEnv(robotOrientation, curCell));
//perform next move
//find rotation
if (move == 3 || move == 7) {
robotOrientation = Direction::left(robotOrientation);
}
else if (move == 2 || move == 6) {
robotOrientation = Direction::opposite(robotOrientation);
}
else if (move == 1 || move == 5) {
robotOrientation = Direction::right(robotOrientation);
}
else {
//no rotation
}
//move forwards
if (!curCell->hasWall(robotOrientation) && !curCell->hasEdge(robotOrientation)) {
curCell = maze.getCell(curCell->getRow() + Direction::row(robotOrientation), curCell->getCol() + Direction::col(robotOrientation));
}
}
//calculate score
//score is a 1 if the end has been reached, else it is 1 - (distance from end * 0.01)
if (curCell == maze.getEndCell()) {
score = 1.0;
}
else {
score = (double)getNumberOfVisitedCells(maze) / (double)((double)maze.getRows() * (double)maze.getCols());
}
//return score
return score;
}
void MazeCreator::move(Maze & m, State & s, Position & c, unsigned char dir) const
{
m.c(c) &= ~dir;
switch (dir) {
case TOP:
m.c(c.first, c.second-1) &= ~BOTTOM;
--c.second;
break;
case BOTTOM:
m.c(c.first, c.second+1) &= ~TOP;
++c.second;
break;
case RIGHT:
m.c(c.first+1, c.second) &= ~LEFT;
++c.first;
break;
case LEFT:
m.c(c.first-1, c.second) &= ~RIGHT;
--c.first;
break;
}
s.visit(c);
}
Maze *MazeGame::CreateMaze(MazeFactory &mazeFactory)
{
Maze *aMaze = mazeFactory.MakeMaze();
Room *r1 = mazeFactory.MakeRoom(1);
Room *r2 = mazeFactory.MakeRoom(2);
Door *door = mazeFactory.MakeDoor(r1, r2);
r1->SetSide(Room::East, door);
r1->SetSide(Room::South, mazeFactory.MakeWall());
r1->SetSide(Room::West, mazeFactory.MakeWall());
r1->SetSide(Room::North, mazeFactory.MakeWall());
r2->SetSide(Room::East, mazeFactory.MakeWall());
r2->SetSide(Room::South, mazeFactory.MakeWall());
r2->SetSide(Room::West, door);
r2->SetSide(Room::North, mazeFactory.MakeWall());
aMaze->AddRoom(r1);
aMaze->AddRoom(r2);
return aMaze;
}
Maze *MazeGame::CreateMaze()
{
Maze *aMaze = new Maze();
Room *r1 = new Room(1);
Room *r2 = new Room(2);
Door *door = new Door(r1, r2);
r1->SetSide(Room::East, door);
r1->SetSide(Room::South, new Wall());
r1->SetSide(Room::West, new Wall());
r1->SetSide(Room::North, new Wall());
r2->SetSide(Room::East, new Wall());
r2->SetSide(Room::South, new Wall());
r2->SetSide(Room::West, door);
r2->SetSide(Room::North, new Wall());
aMaze->AddRoom(r1);
aMaze->AddRoom(r2);
return aMaze;
}
string getSolution(vector <string> maze)
{
set<Maze> app;
queue<Maze> q;
Maze initS;
initS.s = 0;
mazeMap = maze;
H = (int) maze.size();
W = (int) maze[0].size();
for (int i = 0; i < H; ++i)
for (int j = 0; j < W; ++j)
if (maze[i][j] == '.')
initS.s |= (1 << (i * W + j));
q.push(initS);
app.insert(initS);
while (q.size() > 0)
{
Maze now = q.front();
q.pop();
if (now.s == 0) return now.path;
for (int k = 0; k < 4; ++k)
{
Maze news = now.makeMove(k);
if (app.find(news) == app.end())
{
app.insert(news);
q.push(news);
}
}
}
return "";
}
//Estimation statistique du commitor (on utilise directement le Maze)
void commitor_montecarlo(Maze& M, Vector<float>& q)
{
int n=M.size();
q.setSize(n);
q[0]=0;
q[n-1]=1;
int l=M.nbColonnes();
int nb;//compteur d'étapes
float sumnb;//moyenne
int sumB=0;
//Nos deux états limites
Position A(0,0);
Position B(M.nbLignes()-1,M.nbColonnes()-1);
//Position de début et de fin des trajectoire
Position D, F;
for(int i=1;i<n-1;i++)
{
sumB=0;
sumnb=0;
for(int j=0;j<NBITERMC;j++)
{
nb=0;
D=Position(i/l,i%l);
trajectoire(M,D,nb,F,A,B,false);
sumnb+=nb;
if (F==B)
sumB++;
}
q[i]=float(sumB)/float(NBITERMC);
M(i).q[3]=sumnb/float(NBITERMC);
}
}
int main()
{
try
{
Maze a;
Coord start, end;
int row, column;
cout << "请输入迷宫的行数和列数:" << endl;
cin >> row >> column;
cout << "请设置迷宫:('.'表示通道, '#'表示墙壁)" << endl;
a.MazeLayOut(row, column);
cout << "请输入起点的位置:";
cin >> start.row >> start.column;
cout << "请输入终点的位置:";
cin >> end.row >> end.column;
a.FindPath(start, end);
a.ShowDynamicPath();
}
catch(string x)
{
cout << x << endl;
}
return 0;
}
/**
* Verifies the coord validation logic works
* @params pTestData - test object to store the maze in so it
* will get cleaned up in all cases.
* @returns error string if there was an error
*/
string MazeTest::TestCoordValidation(TestUnit::tTestData* pTestData) {
Maze* pMaze = (Maze*)pTestData->testObj;
// Negatives
if (pMaze->isValidCoord(Maze::tCoord(-1, 0, 0))) {
return "Failed to mark coord(-1, 0, 0) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, -1, 0))) {
return "Failed to mark coord(0, -1, 0) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, 0, -1))) {
return "Failed to mark coord(0, 0, -1) as invalid";
}
// Outside
if (pMaze->isValidCoord(Maze::tCoord(100, 0, 0))) {
return "Failed to mark coord(100, 0, 0) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, 100, 0))) {
return "Failed to mark coord(0, 100, 0) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, 0, 100))) {
return "Failed to mark coord(0, 0, 100) as invalid";
}
// Maze edges
if (pMaze->isValidCoord(Maze::tCoord(10, 0, 0))) {
return "Failed to mark coord(0, 0, 100) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, 5, 0))) {
return "Failed to mark coord(0, 0, 100) as invalid";
}
if (pMaze->isValidCoord(Maze::tCoord(0, 0, 7))) {
return "Failed to mark coord(0, 0, 100) as invalid";
}
return "";
}
// Input : Maze, debut, A, B
// Output: fin, nb
void trajectoire(Maze& M, Position& debut, int& nb, Position& fin,const Position& A, const Position& B, const bool& with_aff)
{
debut.bouge(M);
if (debut==A || debut==B)
{
fin=debut;
}
else
{
if (with_aff)
{
M.aff(true);
debut.affiche();
milliSleep(200);
}
trajectoire(M,debut,++nb,fin,A,B,with_aff);
}
}
void initialize(Maze & maze)
{
for ( int y = 0 ; y < (int)maze.GetSizeY() ; y ++ )
{
for ( int x = 0 ; x < (int)maze.GetSizeX() ; x ++ )
{
if ( x == 0 || x == maze.GetSizeX() - 1 ||
y == 0 || y == maze.GetSizeY() - 1 )
maze.SetWall(x, y);
if ( (x%2) == 0 && (y%2) == 0 )
maze.SetWall(x, y);
}
}
}
// This callback function gets called by the Glut
// system whenever it decides things need to be redrawn.
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glLoadIdentity();
double dt = GetDeltaTime();
if (gFirstPerson)
{
double rad = gRat.getDegrees()/180.0 * M_PI;
double dx = cos(rad) * MOVE_SPEED * dt;
double dy = sin(rad) * MOVE_SPEED * dt;
gluLookAt(gRat.getX(), gRat.getY(), gRatHeight, gRat.getX() + dx, gRat.getY() + dy, gRatHeight, 0, 0, 1);
// when doing rat, calculate at point but z will stay.
}
else
{
gluLookAt(M*.5, -N*.5, 15, M*.5, N*.5, 0, 0, 0, 1); // 3 eye, 3 at point, 3 z-axis up
}
gMaze.draw();
gRat.draw(gFirstPerson);
if (gLeft) gRat.spinLeft(dt);
if (gRight) gRat.spinRight(dt);
if (gMiddle) gRat.move(dt);
if (gFirstPerson)
{
gluPerspective(.02, (double)screen_x/screen_y, .0001, .0001);
}
else
{
gluPerspective(40, (double)screen_x/screen_y, N*.5, 3*(M+N));
}
glutSwapBuffers();
glutPostRedisplay();
}
/*
* Rotate the Maze conter-clockwise for 45 degrees to get a grid system. Each
* slash means connection of two pairs of grid points. This function translate
* the Slash Maze to a graph of the grid system.
* */
Grid mazeToGrid(const Maze & m) {
Grid g;
int i = 0, j = 0; //Grid coordinates
int x, y; //Maze coordinates
int h = m.size();
int w = m[0].size();
//Initially, let m(0, 0) corresponds to g(0, 0). This may cause negative i/j
//for a grid, but it doesn't matter, since grid g is a adjacency list.
for (x = 0; x < h; x++) {
int oi = i;
int oj = j;
for (y = 0; y < w; y++) {
//m(x, y) corresponds to g(i, j) that is the top grid of the four grids
//that slash m(x, y) involves.
if (m[x][y] == '\\') {
//Then top and right grids connect, so do left and bottom grids.
g[Point(i, j)].push_back(Point(i, j + 1));
g[Point(i, j + 1)].push_back(Point(i, j));
g[Point(i + 1, j)].push_back(Point(i + 1, j + 1));
g[Point(i + 1, j + 1)].push_back(Point(i + 1, j));
}
else {
//Then top and left grids connect, so do right and bottom grids.
g[Point(i, j)].push_back(Point(i + 1, j));
g[Point(i + 1, j)].push_back(Point(i, j));
g[Point(i, j + 1)].push_back(Point(i + 1, j + 1));
g[Point(i + 1, j + 1)].push_back(Point(i, j + 1));
}
//while m(x, y) corresponds to g(i, j), m(x, y + 1) corresponds to
//g(i - 1, j + 1)
i--;
j++;
}
//while m(x, y) corresponds to g(i, j), m(x + 1, y) corresponds to
//g(i + 1, j + 1)
i = oi + 1;
j = oj + 1;
}
return g;
}
/*----- R e t r a c e ( ) ----------------------------------
PURPOSE
Mark the path from the goal to the start cell.
INPUT PARAMETERS
maze -- the maze object to be marked
-------------------------------------------------------------*/
void Retrace(Maze &maze)
{
Position curPos = maze.Goal();
int distance = maze.State(maze.Goal()); // Distance from start cell
while (distance >= 0)
{
maze.Mark(curPos, PathCell);
if ((maze.State(curPos + StepNorth)) == (distance - 1))
curPos = curPos + StepNorth;
else if ((maze.State(curPos + StepWest)) == (distance - 1))
curPos = curPos + StepWest;
else if ((maze.State(curPos + StepSouth)) == (distance - 1))
curPos = curPos + StepSouth;
else if ((maze.State(curPos + StepEast)) == (distance - 1))
curPos = curPos + StepEast;
distance -= 1;
}
}