cn-sensei-guides/01-white/04-03-PY-air-hockey.js

/**
Ninjas use conditionals and if statements to keep score and move an object 
when a key is pressed.

Reinforced Vocabulary and Concepts
* Boolean Logic
* Comparison Operators
* Functions and Parameters
* GDP isKeyPressed() Function
* GDP Keys Object
* GDP moveY() Function
* GPD .x() and .y() Functions
* if() Statements
* Object Names
* Pseudocode

Decomposition
* left paddle is controlled with keys (coconut chaos)
* right paddle is controlled with mouse (laser chase)
* left side gets a point if ball touches right wall (wall bounce)
* right side gets a point if ball touches left wall 
* ball resets to middle after every point (hungry ninja)
* points are incremented and updated (hungry ninja)

Sensei Notes
* This Prove Yourself requires the Ninja use every coding concept they have 
learned in the second half of the White Belt.
* No code is provided in the manual, but guiding comments are in the scene.
* The Ninja must reference the games they have created for hints.
* The game is divided into three sections that require two if statements each.
* The left paddle moves using the keyboard and the right paddle moves using the 
mouse.
* Encourage the Ninja to take their time and thoroughly test at each step.
 */


//*************Scene - Update Every Frame********************//
/**
 * leftPaddle
 * if the up arrow is pressed, move the leftPaddle up
 * if the down arrow is pressed, move the leftPaddle down
**/
if ( isKeyPressed(Keys.upArrow) ) {
    moveY(leftPaddle, -300);
}

if ( isKeyPressed(Keys.downArrow) ) {
    moveY(leftPaddle, 300);
}

/**
 * rightPaddle
 * if the rightPaddle is below the mouse, move the rightPaddle up
 * if the rightPaddle is above the mouse, move the rightPaddle down
**/

if ( rightPaddle.y() > getMouseY() ) {
    moveY(rightPaddle, -300);
}

if ( rightPaddle.y() < getMouseY() ) {
    moveY(rightPaddle, 300);
}

/**
 * walls
 * if the ball touches right wall, give player 1 a point and reset the ball
 * if the ball touches left wall, give player 2 a point and reset the ball
**/


if ( ball.isTouchingRightWall() ) {
    leftPaddle.score += 1;
    leftScoreLabel.text(leftPaddle.score);
    ball.x(400);
    ball.y(300);
}
if ( ball.isTouchingLeftWall() ) {
    rightPaddle.score += 1;
    rightScoreLabel.text(rightPaddle.score);
    ball.x(400);
    ball.y(300);
}

/**
Sensei Stops
5 Explain to a Sensei how you used and changed code from Laser Chase and 
Coconut Chaos to add paddle movement to this game.
All good programmers know how to repurpose code in different situations. The 
Ninja should be able to explain the parts of the code that they changed and the 
parts of the code that they kept the same.
10 Explain to a Sensei how you used and changed code from Hungry Hungry Ninja to 
add scoring. How did you teleport the ball?
The Ninja should be able to explain the parts of the code that they change and 
the parts of the code that they kept the same.
15 Tell a Sensei three things that you learned in White Belt. What are three 
things you still want to learn?
Let the Ninja reflect on what they learned in White Belt, Ask what their 
favorite game was. Have them articulate what they still want to learn.
 */