void solve(){
double eps1 = 1e-9, eps2 = 1e-10, h = 0.01;
double x = 0, b = 10;
double y_0[N] = {1, 1, 1}, y_1[N], y_2[N];
for(int i = 0; i < N; i++){
y_1[i] = y_0[i];
y_2[i] = y_0[i];
}
print(y_1, x, h);
while(x < b){
if(x + h > b)
h = b - x ;
newStep(x, y_1, h);
newStep(x, y_2, h / 2);
newStep(x + h / 2, y_2, h / 2);
x += h;
print(y_1, x, h);
double err = 0;
for(int j = 0; j < N; j++)
err += (y_1[j] - y_2[j]) * (y_1[j] - y_2[j]);
err = sqrt(err);
for(int j = 0; j < N; j++)
y_2[j] = y_1[j];
if(err > eps1)
h /= 2;
else if(err < eps2)
h *= 2;
}
//fprintf(stderr, "%e\n", fabs(y_1[2] - fReal(y_1, b, 2)));
}
void solve(double h){
double eps1 = 1e-5, eps2 = 1e-15;//, h = 0.1;
double x = 0, b = 1, _h = h;
double y_0[N] = {1}, y_1[N], y_2[N];
for(int i = 0; i < N; i++){
y_1[i] = y_0[i];
y_2[i] = y_0[i];
}
//print(y_1, x, h);
while(x < b){
newStep(x, y_1, h);
newStep(x, y_2, h / 2);
newStep(x + h / 2, y_2, h / 2);
x += h;
print(y_1, x, h);
if(x + h > b)
h = b - x ;
double err = 0;
for(int j = 0; j < N; j++)
err += (y_1[j] - y_2[j]) * (y_1[j] - y_2[j]);
err = sqrt(err);
for(int j = 0; j < N; j++)
y_2[j] = y_1[j];
if(err > eps1)
h /= 2;
else if(err < eps2)
h *= 2;
}
/*double err = 0;
for(int j = 0; j < N; j++){
err += (y_1[j] - fReal(y_1, b, j)) * (y_1[j] - fReal(y_1, b, j));
}
err = sqrt(err);
err /= pow(_h, 4);
printf("%e\n", err); */
}
void solve() {
double y_1[N], y_2[N];
for(int i = 0; i < N; i++) {
y_1[i] = y_0[i];
y_2[i] = y_0[i];
}
double h = 0.1, b = 1, x = x_0;
//int i = 0;
while(x < b) {
printf("x = %lf, h = %lf | ", x, h);
for(int j = 0; j < N; j++)
printf("%lf ", y_1[j]);
printf("\n");
newStep(x, y_1, h);
newStep(x, y_2, h / 2);
newStep(x + h / 2, y_2, h / 2);
double err = 0;
for(int j = 0; j < N; j++)
err += (y_1[j] - y_2[j]) * (y_1[j] - y_2[j]);
err /= N;
if(err > eps) {
h = h / 2;
for(int j = 0; j < N; j++)
y_1[j] = y_2[j];
} else {
for(int j = 0; j < N; j++)
y_2[j] = y_1[j];
}
if(x + h > b)
h = b - x;
x += h;
}
}
GamePainter::GamePainter(QWidget *parent) : QWidget(parent)
{
m_cellSize = QSize( 30, 30 );
m_field = new Field( 15, 15 );
m_snake = new Snake( QPoint( 7, 7) );
m_IsPlay = false;
m_gameTimer = new QTimer;
m_gameSpeed = 160;
m_score = 0;
resize( m_cellSize.width() * ( m_field->getNumWCells() - 2 )
, m_cellSize.height() * (m_field->getNumHCells() - 2 ) + 30 );
QPixmap background("../snake_work_version/background.jpg" );
background.scaled( this->size() );
QPalette p;
p.setBrush( this->backgroundRole(), QBrush( background ) );
this->setPalette(p);
QIcon windowIcon("../snake_work_version/icon1.png");
window()->setWindowTitle("Snake");
window()->setWindowIcon( windowIcon );
connect( m_snake, SIGNAL(newStep(QPoint,QPoint)), m_field, SLOT(snake_move(QPoint,QPoint)) );
connect( m_field, SIGNAL(snake_dead()), SLOT(snake_die()) );
connect( m_field, SIGNAL(snake_ate()), SLOT(snake_eat()));
connect( m_gameTimer, SIGNAL(timeout()), SLOT(game()) );
m_settings = new QSettings( "HOME", "Snake" );
m_highScore = m_settings->value( HIGH_SCORE_KEY, 0 ).toInt() ;
QLabel* high_score = new QLabel("<font face=\"mv boli\" color=#40E0D0><strong>High Score: </strong></font>", this );
high_score->move( 20, -160 );
high_score->resize( 300, 350 );
QLabel* score = new QLabel("<font face=\"mv boli\" color=#40E0D0><strong>Score: </strong></font>", this );
score->move( width() - 100, -160 );
score->resize( 300, 350 );
srand(time(0));
}