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Diffstat (limited to 'libraries/TFT/examples/Esplora/EsploraTFTPong/EsploraTFTPong.ino')
-rw-r--r-- | libraries/TFT/examples/Esplora/EsploraTFTPong/EsploraTFTPong.ino | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/libraries/TFT/examples/Esplora/EsploraTFTPong/EsploraTFTPong.ino b/libraries/TFT/examples/Esplora/EsploraTFTPong/EsploraTFTPong.ino new file mode 100644 index 0000000..e3422d4 --- /dev/null +++ b/libraries/TFT/examples/Esplora/EsploraTFTPong/EsploraTFTPong.ino @@ -0,0 +1,126 @@ +/* + + Esplora TFT Pong + + This example for the Esplora with an Arduino TFT screen reads + the value of the joystick to move a rectangular platform + on the x and y axes. The platform can intersect with a ball + causing it to bounce. The Esplora's slider adjusts the speed + of the ball. + + This example code is in the public domain. + + Created by Tom Igoe December 2012 + Modified 15 April 2013 by Scott Fitzgerald + + http://arduino.cc/en/Tutorial/EsploraTFTPong + + */ + +#include <Esplora.h> +#include <TFT.h> // Arduino LCD library +#include <SPI.h> + +// variables for the position of the ball and paddle +int paddleX = 0; +int paddleY = 0; +int oldPaddleX, oldPaddleY; +int ballDirectionX = 1; +int ballDirectionY = 1; + +int ballX, ballY, oldBallX, oldBallY; + +void setup() { + + Serial.begin(9600); + + // initialize the display + EsploraTFT.begin(); + // set the background the black + EsploraTFT.background(0,0,0); +} + +void loop() { + // save the width and height of the screen + int myWidth = EsploraTFT.width(); + int myHeight = EsploraTFT.height(); + + // map the paddle's location to the joystick's position + paddleX = map(Esplora.readJoystickX(), 512, -512, 0, myWidth) - 20/2; + paddleY = map(Esplora.readJoystickY(), -512, 512, 0, myHeight) - 5/2; + Serial.print(paddleX); + Serial.print(" "); + Serial.println(paddleY); + + // set the fill color to black and erase the previous + // position of the paddle if different from present + EsploraTFT.fill(0,0,0); + + if (oldPaddleX != paddleX || oldPaddleY != paddleY) { + EsploraTFT.rect(oldPaddleX, oldPaddleY, 20, 5); + } + + // draw the paddle on screen, save the current position + // as the previous. + EsploraTFT.fill(255,255,255); + EsploraTFT.rect(paddleX, paddleY, 20, 5); + oldPaddleX = paddleX; + oldPaddleY = paddleY; + + // read the slider to determinde the speed of the ball + int ballSpeed = map(Esplora.readSlider(), 0, 1023, 0, 80)+1; + if (millis() % ballSpeed < 2) { + moveBall(); + } +} + + +// this function determines the ball's position on screen +void moveBall() { + // if the ball goes offscreen, reverse the direction: + if (ballX > EsploraTFT.width() || ballX < 0) { + ballDirectionX = -ballDirectionX; + } + + if (ballY > EsploraTFT.height() || ballY < 0) { + ballDirectionY = -ballDirectionY; + } + + // check if the ball and the paddle occupy the same space on screen + if (inPaddle(ballX, ballY, paddleX, paddleY, 20, 5)) { + ballDirectionY = -ballDirectionY; + } + + // update the ball's position + ballX += ballDirectionX; + ballY += ballDirectionY; + + // erase the ball's previous position + EsploraTFT.fill(0,0,0); + + if (oldBallX != ballX || oldBallY != ballY) { + EsploraTFT.rect(oldBallX, oldBallY, 5, 5); + } + + // draw the ball's current position + EsploraTFT.fill(255,255,255); + + EsploraTFT.rect(ballX, ballY, 5, 5); + + oldBallX = ballX; + oldBallY = ballY; + +} + +// this function checks the position of the ball +// to see if it intersects with the paddle +boolean inPaddle(int x, int y, int rectX, int rectY, int rectWidth, int rectHeight) { + boolean result = false; + + if ((x >= rectX && x <= (rectX + rectWidth)) && + (y >= rectY && y <= (rectY + rectHeight))) { + result = true; + } + + return result; +} |