Adding Interaction - Learning C# by Programming Games - page 132

if -instruction then becomes
if (Painter.GameWorld.IsOutsideWorld(position))
Reset();
Finally, in order to make the game a bit more challenging, we slightly increase the
minimum velocity that the cans get each time we go through the update loop:
minVelocity += 0.001f;
Because the minimum velocity is slightly increasing all the time, the game gets more
difficult as time progresses.
8.3.5 Drawing the Cans on the Screen
For drawing the paint cans on the screen, we add a Draw method to the PaintCan
class. Inside the GameWorld class, we can now call the Update and Draw methods
on the different game objects. So, the new Update method contains the following
instructions:
ball.Update(gameTime);
can1.Update(gameTime);
can2.Update(gameTime);
can3.Update(gameTime);
And the GameWorld.Draw method is given as follows:
public void Draw(GameTime gameTime, SpriteBatch spriteBatch)
{
spriteBatch.Begin();
spriteBatch.Draw(background, Vector2.Zero, Color.White);
ball.Draw(gameTime, spriteBatch);
cannon.Draw(gameTime, spriteBatch);
can1.Draw(gameTime, spriteBatch);
can2.Draw(gameTime, spriteBatch);
can3.Draw(gameTime, spriteBatch);
spriteBatch.End();
}
The complete program ( Painter6 ) is available in the example solution belonging to
this chapter.