void addLength(int size) // add a length to the snake in pixels
{
BodySegment trailing = bodySegments[bodySegments.Count - 1]; // retrieve the last body segment since we're building off the tail of the snake
// get the buildup angle
double buildAngle = trailing.velocity.Degrees * Math.PI / 180 + Math.PI; // flip it around
// get the change in each dimension
int dx = (int)(size * Math.Cos(buildAngle));
int dy = (int)(size * Math.Sin(buildAngle));
// add the new dimensions
trailing.grow(dx, dy);
}
// temporary constructor
public ContinuousSnake(int x, int y, CoreForm _mainForm, Vector _velocity, double size, bool red = false)
{
// assign all variables
this.Size = (int)size;
this.mainForm = _mainForm;
this.red = red;
// find angle to build the body in rads
double angle = _velocity.Degrees * Math.PI / 180 + Math.PI; // add PI radians to flip the angle around
// since the build must occur in opposite direction of velocity
int[] coords = new int[] { x, y }; // coords in proper form to be used
BodySegment segment = new BodySegment(0, 0, coords, _velocity.Clone(), mainForm); // set size to zero for now
int dx = (int)(BodyPart.SIZE * size * Math.Cos(angle)); // get change in each direction for the new size
int dy = (int)(BodyPart.SIZE * size * Math.Sin(angle)); // add negative because coords are reversed on screen
// whichever is zero will be default width
if (dx == 0)
{
dx = BodyPart.SIZE;
}
else
{
dy = BodyPart.SIZE;
}
segment.grow(dx, dy);
if (_velocity.Degrees == 180 || _velocity.Degrees == 90) // make the snake head at proper coords
{
snakeHead = new BodyPart(segment.X, segment.Y, _velocity.Clone(), mainForm);
}
else if (_velocity.Degrees == 0)
{
snakeHead = new BodyPart((int)(segment.X + BodyPart.SIZE * size - BodyPart.SIZE), segment.Y, _velocity.Clone(), mainForm);
}
else if (_velocity.Degrees == 0)
{
snakeHead = new BodyPart(segment.X, (int)(segment.Y + BodyPart.SIZE * size - BodyPart.SIZE), _velocity.Clone(), mainForm);
}
FixHead(); // fix head orientation based on velocity
// add the segment to the bodySegments list to keep track of it
bodySegments.Add(segment);
// set the timer event for preventing too fast player responses
interval.Elapsed += new ElapsedEventHandler(intervalFunc);
// do the red colour thing
if (red)
{
// make the segment red if the red flag is set
bodySegments[0].picBox.BackColor = Color.Red;
bodySegments[0].picBox.Image = null;
}
}
