Merge branch 'merge-1.0.5' into ide-1.5.x-discovery

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;  
+}