/// <summary>
/// Builds a nice preview of a train.
/// </summary>
public PreviewDrawer CreatePreview(Size pixelSize, int trainlength)
{
PreviewDrawer pd = new PreviewDrawer(pixelSize, new Size(1, 3), 0);
// build up rail like
//
// /~~~~~
// /
for (int x = -10; x < 0; x++)
{
pd.Draw(RailPattern.get(Direction.WEST, Direction.EAST), x, 0);
}
pd.Draw(RailPattern.get(Direction.WEST, Direction.SOUTHEAST), 0, 0);
for (int x = 1; x <= 10; x++)
{
pd.Draw(RailPattern.get(Direction.NORTHWEST, Direction.SOUTHEAST), x, x);
}
TrainCarContribution[] cars = Create(trainlength);
/*if( cars==null ) {
* for( int i=6; cars==null && i<15; i++ )
* cars = create(i);
* for( int i=4; cars==null && i>0; i-- )
* cars = create(i);
* if( cars==null )
* return pd; // no preview
* }*/
if (cars == null)
{
return(pd); // no preview
}
int[] pos = new int[] { -2, 0, -1, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5 };
int[] angle = new int[] { 12, 12, 13, 14, 14, 14, 14, 14 };
int[] offset = new int[] { 0, 0, 0, 0, 4, +2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
using (DrawContext dc = new DrawContext(pd.Surface))
{
for (int i = 7; i >= 0; i--)
{
if (cars.Length <= i)
{
continue; // no car
}
Point pt = pd.GetPoint(pos[i * 2], pos[i * 2 + 1]);
cars[i].Draw(pd.Surface,
new Point(pt.X + offset[i * 2], pt.Y + offset[i * 2 + 1] - 9), angle[i]);
}
}
return(pd);
}