1 | /*
|
---|
2 |
|
---|
3 | Esplora TFT Pong
|
---|
4 |
|
---|
5 | This example for the Esplora with an Arduino TFT screen reads
|
---|
6 | the value of the joystick to move a rectangular platform
|
---|
7 | on the x and y axes. The platform can intersect with a ball
|
---|
8 | causing it to bounce. The Esplora's slider adjusts the speed
|
---|
9 | of the ball.
|
---|
10 |
|
---|
11 | This example code is in the public domain.
|
---|
12 |
|
---|
13 | Created by Tom Igoe December 2012
|
---|
14 | Modified 15 April 2013 by Scott Fitzgerald
|
---|
15 |
|
---|
16 | http://arduino.cc/en/Tutorial/EsploraTFTPong
|
---|
17 |
|
---|
18 | */
|
---|
19 |
|
---|
20 | #include <Esplora.h>
|
---|
21 | #include <TFT.h> // Arduino LCD library
|
---|
22 | #include <SPI.h>
|
---|
23 |
|
---|
24 | // variables for the position of the ball and paddle
|
---|
25 | int paddleX = 0;
|
---|
26 | int paddleY = 0;
|
---|
27 | int oldPaddleX, oldPaddleY;
|
---|
28 | int ballDirectionX = 1;
|
---|
29 | int ballDirectionY = 1;
|
---|
30 |
|
---|
31 | int ballX, ballY, oldBallX, oldBallY;
|
---|
32 |
|
---|
33 | void setup() {
|
---|
34 |
|
---|
35 | Serial.begin(9600);
|
---|
36 |
|
---|
37 | // initialize the display
|
---|
38 | EsploraTFT.begin();
|
---|
39 | // set the background the black
|
---|
40 | EsploraTFT.background(0, 0, 0);
|
---|
41 | }
|
---|
42 |
|
---|
43 | void loop() {
|
---|
44 | // save the width and height of the screen
|
---|
45 | int myWidth = EsploraTFT.width();
|
---|
46 | int myHeight = EsploraTFT.height();
|
---|
47 |
|
---|
48 | // map the paddle's location to the joystick's position
|
---|
49 | paddleX = map(Esplora.readJoystickX(), 512, -512, 0, myWidth) - 20 / 2;
|
---|
50 | paddleY = map(Esplora.readJoystickY(), -512, 512, 0, myHeight) - 5 / 2;
|
---|
51 | Serial.print(paddleX);
|
---|
52 | Serial.print(" ");
|
---|
53 | Serial.println(paddleY);
|
---|
54 |
|
---|
55 | // set the fill color to black and erase the previous
|
---|
56 | // position of the paddle if different from present
|
---|
57 | EsploraTFT.fill(0, 0, 0);
|
---|
58 |
|
---|
59 | if (oldPaddleX != paddleX || oldPaddleY != paddleY) {
|
---|
60 | EsploraTFT.rect(oldPaddleX, oldPaddleY, 20, 5);
|
---|
61 | }
|
---|
62 |
|
---|
63 | // draw the paddle on screen, save the current position
|
---|
64 | // as the previous.
|
---|
65 | EsploraTFT.fill(255, 255, 255);
|
---|
66 | EsploraTFT.rect(paddleX, paddleY, 20, 5);
|
---|
67 | oldPaddleX = paddleX;
|
---|
68 | oldPaddleY = paddleY;
|
---|
69 |
|
---|
70 | // read the slider to determinde the speed of the ball
|
---|
71 | int ballSpeed = map(Esplora.readSlider(), 0, 1023, 0, 80) + 1;
|
---|
72 | if (millis() % ballSpeed < 2) {
|
---|
73 | moveBall();
|
---|
74 | }
|
---|
75 | }
|
---|
76 |
|
---|
77 |
|
---|
78 | // this function determines the ball's position on screen
|
---|
79 | void moveBall() {
|
---|
80 | // if the ball goes offscreen, reverse the direction:
|
---|
81 | if (ballX > EsploraTFT.width() || ballX < 0) {
|
---|
82 | ballDirectionX = -ballDirectionX;
|
---|
83 | }
|
---|
84 |
|
---|
85 | if (ballY > EsploraTFT.height() || ballY < 0) {
|
---|
86 | ballDirectionY = -ballDirectionY;
|
---|
87 | }
|
---|
88 |
|
---|
89 | // check if the ball and the paddle occupy the same space on screen
|
---|
90 | if (inPaddle(ballX, ballY, paddleX, paddleY, 20, 5)) {
|
---|
91 | ballDirectionY = -ballDirectionY;
|
---|
92 | }
|
---|
93 |
|
---|
94 | // update the ball's position
|
---|
95 | ballX += ballDirectionX;
|
---|
96 | ballY += ballDirectionY;
|
---|
97 |
|
---|
98 | // erase the ball's previous position
|
---|
99 | EsploraTFT.fill(0, 0, 0);
|
---|
100 |
|
---|
101 | if (oldBallX != ballX || oldBallY != ballY) {
|
---|
102 | EsploraTFT.rect(oldBallX, oldBallY, 5, 5);
|
---|
103 | }
|
---|
104 |
|
---|
105 | // draw the ball's current position
|
---|
106 | EsploraTFT.fill(255, 255, 255);
|
---|
107 |
|
---|
108 | EsploraTFT.rect(ballX, ballY, 5, 5);
|
---|
109 |
|
---|
110 | oldBallX = ballX;
|
---|
111 | oldBallY = ballY;
|
---|
112 |
|
---|
113 | }
|
---|
114 |
|
---|
115 | // this function checks the position of the ball
|
---|
116 | // to see if it intersects with the paddle
|
---|
117 | boolean inPaddle(int x, int y, int rectX, int rectY, int rectWidth, int rectHeight) {
|
---|
118 | boolean result = false;
|
---|
119 |
|
---|
120 | if ((x >= rectX && x <= (rectX + rectWidth)) &&
|
---|
121 | (y >= rectY && y <= (rectY + rectHeight))) {
|
---|
122 | result = true;
|
---|
123 | }
|
---|
124 |
|
---|
125 | return result;
|
---|
126 | }
|
---|