c
复制代码
#include "Snake.h"
#include "Food.h"
#include "Stone.h"
#include "Mushroom.h"
#include "Ai.h"
#include "Game.h"
#include "Util.h"
#include "SnakeUnit.h"
#include <QGraphicsScene>
#include <QGraphicsRectItem>
#include <QTimer>
#include <QDebug>
#include <typeinfo.h>
#include <stdlib.h>
#include <QDesktopWidget>
extern Game *g;
QGraphicsScene *sc;
QTimer *timer;
Snake::Snake()
{
}
Snake::Snake(QGraphicsScene *s, QString nam, int l)
{
sc = s;
length = l;
size = 6;
alive = false;
direction = "right";
score = 1;
count = 0;
speed = size+2;
name = nam;
type = "me";
//snake body
int startX = Util::screenWidth()/2;
int startY = Util::screenHeight()/2;
color = Util::randomSnakeColor();
pic = ":/images/snakeUnit"+QString::number(color)+".png";
for(int i=0; i<length; i++){
SnakeUnit *e = new SnakeUnit(name, this);
if(i==0){
e->setPixmap(QPixmap(":/images/snakeUnit"+QString::number(color)+"Head.png"));
e->setTransformOriginPoint(e->pixmap().width()/2, e->pixmap().height()/2);
}
else{
e->setPixmap(QPixmap(pic));
e->setZValue(-100);
}
e->setPos(startX-i*size, startY);
s->addItem(e);
body.append(e);
}
body[0]->setRotation(90);
//boundary
boundary = new QGraphicsEllipseItem(0, 0, 100, 100);
boundary->setPen(QPen(Qt::transparent));
boundary->setZValue(-1);
s->addItem(boundary);
//snake name
info = new QGraphicsTextItem();
info->setFont(QFont("calibri", 9));
info->setPlainText(name);
info->setDefaultTextColor(Qt::white);
info->setPos(startX+10, startY+10);
s->addItem(info);
//move timer
timer = new QTimer();
connect(timer, SIGNAL(timeout()), this, SLOT(move()));
timer->start(100);
}
void Snake::move()
{
if(g->snake->alive == true){
//move snake
for(int i = body.size()-1; i>=0; i--){
//body
if(i != 0){
body[i]->setX(body[i-1]->x());
body[i]->setY(body[i-1]->y());
}
//head
else{
//move according to direction
if(direction == "right"){
body[0]->setX(body[0]->x()+speed);
}
else if(direction == "left"){
body[0]->setX(body[0]->x()-speed);
}
else if(direction == "up"){
body[0]->setY(body[0]->y()-speed);
}
else if(direction == "down"){
body[0]->setY(body[0]->y()+speed);
}
}
}
//move boundary
boundary->setX(body[0]->x()-boundary->rect().width()/2);
boundary->setY(body[0]->y()-boundary->rect().height()/2);
//move snake name
info->setX(body[0]->x()+10);
info->setY(body[0]->y()+10);
//acc according to ai type
if(type == "normal"){
//change direction randomly with low attack level
changeRandomDirection(1);
}
else if(type == "chipku"){
avoidThreat();
//change direction randomly according to attack level
changeRandomDirection(g->attackLevel);
}
else if(type == "courage"){
//move away from threat if present
avoidThreat();
//change direction randomly with low attack level
changeRandomDirection(1);
}
else if(type == "paytu"){
avoidThreat();
//eat nearby food
QList<QGraphicsItem *> food_items = boundary->collidingItems();
for(int i=0; i<food_items.size(); i++){
if(typeid(*(food_items[i])) == typeid(Food) || (typeid(*(food_items[i])) == typeid(Mushroom))){
//if food has minimum life of 2 seconds
Food *f = (Food*)food_items[i];
if(f->life > 1){
QString d = Util::giveDirection(body[0]->x(), body[0]->y(), f->x(), f->y());
if(d != Util::oppositeDirection(direction)){
changeDirection(d);
qDebug()<<"Food";
}
}
}
}
}
//check collssion
QList<QGraphicsItem *> colliding_items = body[0]->collidingItems();
for(int i=0; i<colliding_items.size(); i++){
//food
if(typeid(*(colliding_items[i])) == typeid(Food)){
body[0]->scene()->removeItem(colliding_items[i]);
delete colliding_items[i];
count+=2;
//update length at each 10 score
if(count > 10){
score++;
count = 0;
g->updateScore();
//append one unit
SnakeUnit *e = new SnakeUnit(name, this);
e->setPixmap(QPixmap(pic));
e->setPos(-100,-100);
body[0]->scene()->addItem(e);
body.append(e);
}
}
// Mushroom
else if(typeid(*(colliding_items[i])) == typeid(Mushroom)){
g->scene->removeItem(colliding_items[i]);
delete colliding_items[i];
count+=5;
g->updateScore();
}
//stone
else if(typeid(*(colliding_items[i])) == typeid(Stone)){
destroy();
break;
}
//other snake
else if(typeid(*(colliding_items[i])) == typeid(SnakeUnit) && ((SnakeUnit*)colliding_items[i])->parent != this){
qDebug()<<"Collission " + name + " : " + ((SnakeUnit*)colliding_items[i])->name;
destroy();
break;
}
}
//check screen-bounds
if(body[0]->x() > sc->width()) body[0]->setX(0);
else if(body[0]->x() < 0) body[0]->setX(sc->width());
else if(body[0]->y() < 0) body[0]->setY(sc->height());
else if(body[0]->y() > sc->height()) body[0]->setY(0);
}
}
void Snake::destroy(){
//remove yourself and turn into clouds
for(int i=0; i<body.size(); i++){
SnakeUnit *s = body[i];
new Food(sc, 1, 1, s->x(), s->y());
g->scene->removeItem(s); //remove body from scene
}
g->scene->removeItem(info); //remove info from scene
alive = false;
g->snakes.removeOne(this);
Util::removeReservedName(this->name);
Util::removeReservedColor(this->color);
g->scene->removeItem(this->boundary);
//delete ai from memory
if(type == "ai"){
delete this;
}
//add new snake
g->generateAi(1);
}
void Snake::changeDirection(QString dir){
if(dir=="right" && direction != "left"){
direction = "right";
body[0]->setRotation(0);
body[0]->setRotation(90);
}
else if(dir=="left" && direction != "right"){
direction = "left";
body[0]->setRotation(0);
body[0]->setRotation(-90);
}
else if(dir=="up" && direction != "down"){
direction = "up";
body[0]->setRotation(0);
}
else if(dir=="down" && direction != "up"){
direction = "down";
body[0]->setRotation(0);
body[0]->setRotation(180);
}
}
void Snake::changeRandomDirection(int attackLevel){
if(Util::random(0,10) % 2 == 0){
//change direction
int r = Util::random(0,3+attackLevel);
if(r==0 && direction != "left"){
changeDirection("right");
}
else if(r==1 && direction != "right"){
changeDirection("left");
}
else if(r==2 && direction != "down"){
changeDirection("up");
}
else if(r==3 && direction != "up"){
changeDirection("down");
}
//move towards the player
else if(r>3){
QString d = Util::giveDirection(body[0]->x(), body[0]->y(), g->snake->body[0]->x(), g->snake->body[0]->y());
if(direction != Util::oppositeDirection(d)) changeDirection(d);
}
}
}
void Snake::avoidThreat(){
bool threat = false;
int threatPointX, threatPointY;
QList<QGraphicsItem *> boundary_items = boundary->collidingItems();
for(int i=0; i<boundary_items.size(); i++){
//if its other's boundary or body
if(typeid(*(boundary_items[i])) == typeid(QGraphicsEllipseItem) || (typeid(*(boundary_items[i])) == typeid(SnakeUnit)) || (typeid(*(boundary_items[i])) == typeid(Stone))){
threat = true;
threatPointX = (boundary_items[i])->x();
threatPointY = (boundary_items[i])->y();
}
}
if(threat == true){
QString d = Util::giveDirection(body[0]->x(), body[0]->y(), threatPointX, threatPointY);
if(d != Util::oppositeDirection(direction)){
changeDirection(Util::oppositeDirection(d));
qDebug()<<"Threat kiled";
}
}
}
