Text

In this assignment, you will add text to the game from a previous assignment that lets the player “pop” balloons by moving the mouse over them. This sketch will be named textgame.

The Changes

• The sketch window will be 400 by 450, not 400 by 400.
• Draw a separator line from (0, 400) to (400, 400)
• The area above the line is where the balloons appear; they may not go into the area below the line.
• The area below the line will contain text.
• At the left side, you will display a running clock giving the number of minutes and seconds since the start of the game.
• At the right side, you will display, properly labeled, the number of balloons remaining.
• All text display is in Arial 16-point font.
• When all the balloons are popped, the timer will stop and you will display a message: Click for a new game. in the center of the playing area (above the separator line). A mouse click with no balloons left will start a new game.

Suggestions

• Create a final int in the Balloon class to specify the height of the playing area. You can’t use height, because that includes the text area.
• Use Processing’s millis() function to figure out how long the program has been running.
• Since each game starts the “clock” back at zero, you will need one variable for the “start time” and one variable for the “current time,” both measured in milliseconds since the program started.
• When all the balloons are popped, use noLoop() so that Processing will not call draw() any more.
• You may want to write a function named startGame() that creates the balloons, sets the timing variables, and calls the loop() function to make Processing start executing the draw() function again.

Formatting the Time

You can’t just say something like this:

int minutes = some calculation;
int seconds = some calculation;
String elapsedTime = minutes + ":" + seconds;

because, if the seconds is less than 10, you would end up with a string like 2:5 instead of 2:05. Here is a function named twoDigits() which takes an integer as a parameter and returns a two-digit string (as a String), and how you might use it in your program.

String twoDigits(int n)
{
  String result = "" + n; // converts integer to String
  if (n < 10)
  {
    result = "0" + result;
  }
  return result;
}
// how you use it:
int minutes = some calculation;
int seconds = some calculation;
String elapsedTime = minutes + ":"
  + twoDigits(seconds);

When You Finish

Zip up the sketch into a zip file named textgame.zip and upload it.

See what the result should look like.