/// <summary>
/// Method that moves snake's tail by deleting the last bone
/// </summary>
/// <returns>Coordinates of the last bone that was deleted</returns>
public Coordinates moveTail()
{
int z = tail.getBone().getDirection(); // direction last bone follow
Coordinates last = tail.getBone().getCoord();
setTail(tail.getPrev());
tail.setNext(null);
int d = tail.getBone().getDirection(); // direction snake moves
if (d != z)
{//if directioin of ex-tail and new tail are different, direction of new tail should be changed, as it used to hold corner
if (d == 9)
{
tail.getBone().setDirection(z == 6 ? 2 : 4);
}
else if (d == 7)
{
tail.getBone().setDirection(z == 8 ? 6 : 2);
}
else if (d == 3)
{
tail.getBone().setDirection(z == 2 ? 4 : 8);
}
else if (d == 1)
{
tail.getBone().setDirection(z == 4 ? 8 : 6);
}
}
length--;
return(last);
}
/// <summary>
/// Method that moves snake's head by adding new Join to it. Snake is following received direction
/// </summary>
/// <param name="direction">direction in whitch snake is moving</param>
/// <returns></returns>
public Coordinates moveHead(int direction)
{
//creates next bone and connects it before snake's head. That imitates that head was moved
Bone newBone = new Bone(direction, head.getBone().getCoord().getX(), head.getBone().getCoord().getY());
Join j = new Join(newBone, null, head);
head.setPrev(j);
//direction of ex-head should be changed. 8-up, 2-down, 4-left, 6-right. 1,7,3,9 - corners.
//use numeric keypad to visualise direction better
int z = head.getBone().getDirection();
if (direction != z)
{//if direction of nex head and ex-head are different, then change diretion of ex-head to hold corner
if (direction == 8)
{
head.getBone().setDirection(z == 4 ? 1 : 3);
j.getBone().getCoord().setY(newBone.getCoord().getY() - 1);
}
else if (direction == 6)
{
head.getBone().setDirection(z == 8 ? 7 : 1);
j.getBone().getCoord().setX(newBone.getCoord().getX() + 1);
}
else if (direction == 2)
{
head.getBone().setDirection(z == 4 ? 7 : 9);
j.getBone().getCoord().setY(newBone.getCoord().getY() + 1);
}
else if (direction == 4)
{
head.getBone().setDirection(z == 8 ? 9 : 3);
j.getBone().getCoord().setX(newBone.getCoord().getX() - 1);
}
}
else
{
switch (direction)
{// correction of coordinates of a new head
case 2: j.getBone().getCoord().setY(newBone.getCoord().getY() + 1); break;
case 4: j.getBone().getCoord().setX(newBone.getCoord().getX() - 1); break;
case 6: j.getBone().getCoord().setX(newBone.getCoord().getX() + 1); break;
case 8: j.getBone().getCoord().setY(newBone.getCoord().getY() - 1); break;
}
}
setHead(j);
length++;
return(head.getBone().getCoord());
}
/// <summary>
/// Fill the form with objects that will hold pictures during the game proccess
/// </summary>
private void panel1_fill()
{
int bsize = 30;
for (int i = 0; i < x; i++)
{
for (int j = 0; j < y; j++)
{
picb[i, j] = new PictureBox();
picb[i, j].Size = new Size(bsize, bsize);
picb[i, j].Location = new System.Drawing.Point(bsize * i, bsize * j);
picb[i, j].Image = null;
picb[i, j].SizeMode = PictureBoxSizeMode.StretchImage;
picb[i, j].Margin = new System.Windows.Forms.Padding(0, 0, 0, 0);
picb[i, j].MouseEnter += new System.EventHandler(enterSpace);
picb[i, j].MouseLeave += new System.EventHandler(leaveSpace);
picb[i, j].Click += new System.EventHandler(putRock);
panel1.Controls.Add(picb[i, j]);
}
}
// put pictures of the first snake on a "gameboard"
Join current = snake.getHead();
setHeadLabel(current.getBone(), images);
while (current.hasNext())
{
current = current.getNext();
if (current.hasNext())
{
setBoneLabel(current.getBone(), images);
}
else
{
setTailLabel(current.getBone(), images);
}
}
if (iftwo)
{// put pictures of the second snake on a "gameboard"
label3.Text = "Yellow 0:0 Red";
current = snake2.getHead();
setHeadLabel(current.getBone(), images2);
while (current.hasNext())
{
current = current.getNext();
if (current.hasNext())
{
setBoneLabel(current.getBone(), images2);
}
else
{
setTailLabel(current.getBone(), images2);
}
}
}
}
