protected int GetBrightnes(SpaceItem item)
{
int distance = item.GetDistance(rocketItem);
int brightness = 100 - (int)(distance / 3.5);
if (brightness < 0)
{
brightness = 0;
}
return brightness;
}
private Bullet(SpaceItem firedFrom)
{
//to used in friendly-fire collision detection
this.firedFrom=firedFrom;
this.field = firedFrom.field;
this._rotation = firedFrom.Rotation;
this.Thrust();
//add in the inertia of the thing I was fired from
//makes the physics look more realistic
this.x_speed = this.x_speed + firedFrom.x_speed;
this.y_speed = this.y_speed + firedFrom.y_speed;
this.x_pos = firedFrom.X;
this.y_pos = firedFrom.Y;
//place in the exact center, to start
this.Radius = 3;
}
private Point rotatePoint(Point point, SpaceItem item)
{
Point rotated = new Point();
Point origin = new Point(item.X, item.Y);
double radians = item.Rotation / 57.32;
rotated.X = origin.X + (int)(Math.Cos(radians) * (point.X - origin.X) -
Math.Sin(radians) * (point.Y - origin.Y) );
rotated.Y = origin.Y + (int)(Math.Sin(radians) * (point.X - origin.X) +
Math.Cos(radians) * (point.Y - origin.Y));
return rotated;
}
private Point[] getRotatedPoints(Point[] points, SpaceItem item)
{
Point[] rotatedPoints = new Point[points.Length];
for (int index = 0; index < points.Length; index++)
{
rotatedPoints[index] = rotatePoint(points[index], item);
}
return rotatedPoints;
}
private Point[] getRelativePoints(Point[] points, SpaceItem item)
{
Point[] adjustedPoints = new Point[points.Length];
for (int index = 0; index < points.Length; index++)
{
adjustedPoints[index] = new Point(points[index].X + item.X, points[index].Y + item.Y);
}
return adjustedPoints;
}
private void DrawSpaceItem(Graphics g, SpaceItem item, Field field, int brightness)
{
double scale = brightness / 100.0;
int newRed = (int)(item.ItemColor.R * scale);
int newGreen = (int)(item.ItemColor.G * scale);
int newBlue = (int)(item.ItemColor.B * scale);
Color penColor = Color.FromArgb(newRed, newGreen, newBlue);
Pen pen = new Pen(penColor);
Point[] points = item.EdgePoints;
Point[] relativePoints = getRelativePoints(points, item);
Point[] rotatedPoints = getRotatedPoints(relativePoints, item);
g.DrawLines(pen, rotatedPoints);
}
public override void Collide(SpaceItem item)
{
this.DrawColor = Color.Red;
Console.Beep();
}
public static Bullet Create(SpaceItem firedFrom)
{
return new Bullet(firedFrom);
}
public bool CheckCollision(SpaceItem otherItem)
{
int distance = GetDistance(otherItem);
if (distance <= this.radius + otherItem.Radius)
{
return true;
}
else
{
return false;
}
}
public int GetDistance(SpaceItem otherItem)
{
int x_gap = Math.Abs(this.X - otherItem.X);
int y_gap = Math.Abs(this.Y - otherItem.Y);
return (int)Math.Sqrt((x_gap * x_gap) + (y_gap * y_gap));
}
public virtual void Collide(SpaceItem item)
{
}