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AirHocky.ino
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AirHocky.ino
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#include <Adafruit_GFX.h>
#include <Adafruit_ST7735.h>
#include <SPI.h>
#define LEDA_PIN 7
#define TFT_RST 9 // reset line (optional, pass -1 if not used)
#define TFT_CS 10 // chip select line
#define TFT_DC 8 // data command line
#define VRX1 A0 // Player 1 X axis
#define VRY1 A1 // Player 1 Y axis
#define VRX2 A2 // Player 2 X axis
#define VRY2 A3 // Player 2 Y axis
// Colors in GBR format
const uint16_t BLACK = 0x1700F3, ORANGE = 0x00C68E, ARROW = 0xec8e5f, WHITE = 0xab4e7f, PONE = 0x0DF233, PTWO = 0x6752BF, DARK = 0x1A2000, BALL = 0x520BBF, FIELD = 0x000033;
// Ball Size
const byte r = 4;
byte score1, score2;
float ballX, ballY, x1, y1, x2, y2, lx1, lx2, ly1, ly2, delX, delY;
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_RST);
void setup() {
pinMode(6, OUTPUT);
digitalWrite(6, 1);
pinMode(LEDA_PIN, OUTPUT);
pinMode(VRX1, INPUT);
pinMode(VRY1, INPUT);
pinMode(VRX2, INPUT);
pinMode(VRY2, INPUT);
analogWrite(LEDA_PIN, 128); // Set backlight to 50% brightness
tft.initR(INITR_BLACKTAB);
Serial.begin(9600);
Serial.println("starting ST 7735 TFT");
tft.fillScreen(DARK);
}
void loop() {
score1 = score2 = 0;
ballX = 80;
tft.setRotation(4);
// Start Screen
tft.setTextColor(WHITE);
for (byte i = 0; i < 161; i += 4) {
tft.fillRect(25, 0, 80, i, ORANGE);
}
for (byte i = 0; i < 81; i += 4) {
tft.fillRect(25, 0, i, 160, BLACK);
}
// Draw Arrow
tft.setRotation(1);
for (byte i = 0; i < 2; i++) {
for (byte i = 0; i < 41; i++) {
tft.fillRect(32, 105 - i, 16, i, ARROW);
delay(3);
}
for (byte i = 65; i > 46; i--) {
tft.fillTriangle(40, i, 24, 65, 56, 65, ARROW);
delay(3);
}
tft.setRotation(3);
}
// Wait for both players to be ready (Push Foward)
int p1, p2;
while (analogRead(VRY1) > 100 || analogRead(VRY2) < 923) {
// Player 1
tft.setRotation(3);
if (analogRead(VRY1) - p1 > 5) {
tft.fillRect(0, 25, 80, 80, BLACK);
tft.fillRect(32, 65, 16, 40, ARROW);
tft.fillTriangle(40, 45, 24, 65, 56, 65, ARROW);
}
p1 = analogRead(VRY1);
if (analogRead(VRY1) < 234)
tft.fillRect(32, 65, 16, 40, WHITE);
else
tft.fillRect(32, analogRead(VRY1) * 40 / 166 + 8.614457831325296, 16, analogRead(VRY1) * -40 / 166 + 96.3855421686747, WHITE);
if (234 - analogRead(VRY1) > 5)
tft.fillTriangle(40, analogRead(VRY1) * 20 / 134 + 30.07462686567164, 24, 65, 56, 65, WHITE);
// Player 2
tft.setRotation(1);
if (p2 - analogRead(VRY2) > 5) {
tft.fillRect(0, 25, 80, 80, BLACK);
tft.fillRect(32, 65, 16, 40, ARROW);
tft.fillTriangle(40, 45, 24, 65, 56, 65, ARROW);
}
p2 = analogRead(VRY2);
if (analogRead(VRY2) > 844)
tft.fillRect(32, 65, 16, 40, WHITE);
else
tft.fillRect(32, analogRead(VRY2) * -40 / 332 + 166.6867469879518, 16, analogRead(VRY2) * 40 / 332 - 61.68674698795181, WHITE);
if (analogRead(VRY2) > 844)
tft.fillTriangle(40, analogRead(VRY2) * -20 / 66 + 320.75757575757575, 24, 65, 56, 65, WHITE);
}
// Game Start
while (score1 < 3 && score2 < 3) { // Score Limit
tft.setRotation(3);
tft.fillScreen(BLACK);
delX = delY = 0;
ballY = 65; // Locate Ball
tft.fillCircle(x1, y1, r, PONE);
tft.fillCircle(x2, y2, r, PTWO);
tft.fillCircle(ballX, ballY, r, BALL);
while (ballX >= r && ballX <= 160 - r || ballY <= 55 - r || ballY > 75 + r) { // Ball in the area
area();
x1 = analogRead(VRX1) * 75.0 / 1023 + 5; // Locate Joystick 1
y1 = analogRead(VRY1) * 70.0 / 1023 + 30;
if (byte(lx1) != byte(x1) || byte(ly1) != byte(y1)) {
tft.fillCircle(lx1, ly1, r, BLACK);
area();
tft.fillCircle(x1, y1, r, PONE);
lx1 = x1;
ly1 = y1;
}
x2 = analogRead(VRX2) * 75.0 / 1023 + 80; // Locate Joystick 2
y2 = analogRead(VRY2) * 70.0 / 1023 + 30;
if (byte(lx2) != byte(x2) || byte(ly2) != byte(y2)) {
tft.fillCircle(lx2, ly2, r, BLACK);
area();
tft.fillCircle(x2, y2, r, PTWO);
lx2 = x2;
ly2 = y2;
}
if (abs(ballX - x1) <= 10 && abs(ballY - y1) <= 10) { // Player 1 touch the ball
delX = (ballX - x1) / 10;
delY = (ballY - y1) / 10;
}
if (abs(ballX - x2) <= 10 && abs(ballY - y2) <= 10) { // Player 2 touch the ball
delX = (ballX - x2) / 10;
delY = (ballY - y2) / 10;
}
if (delX || delY) { // Ball move
tft.fillCircle(ballX, ballY, r, BLACK);
ballX += delX;
ballY += delY;
tft.fillCircle(ballX, ballY, r, BALL);
}
if (ballX < r)
delX = abs(delX); // Ball touch the left, delX always positive
if (ballX > 160 - r)
delX = -abs(delX); // Ball touch the right, delX always negative
if (ballY < 25 + r)
delY = abs(delY); // Ball touch the up, delY always positive
if (ballY > 105 - r)
delY = -abs(delY); // Ball touch the down, delY always negative
}
byte side = 80;
if (ballX < 80) { // Player 1 score
score1++;
ballX = 60;
} else { // Player 2 score
score2++;
ballX = 100;
side = 0;
}
// Score animation
tft.setTextSize(4);
tft.setTextColor(WHITE);
for (int i = 0; i < 2; i++) {
tft.setRotation(3);
tft.fillRect(side, 25, 80, 80, DARK);
tft.setCursor(30, 60);
tft.println(score2);
tft.setRotation(1);
tft.setCursor(30, 60);
tft.println(score1);
delay(500);
tft.setRotation(3);
tft.fillRect(side, 25, 80, 80, BLACK);
area();
tft.setCursor(30, 60);
tft.println(score2);
tft.setRotation(1);
tft.setCursor(30, 60);
tft.println(score1);
delay(500);
}
}
// Game end animation
tft.fillScreen(BLACK);
byte winner = 2;
if (score1 > 2)
winner = 1;
tft.setRotation(winner * 2 - 1);
tft.setTextSize(2);
tft.setCursor(10, 40);
tft.setTextColor(WHITE);
tft.print("player");
tft.print(winner);
tft.print(" Win");
for (int i = 1; i < 26; i++) {
tft.fillRect(0, 105 - i, 160, i, DARK);
}
delay(2000);
}
// Draw the area
void area() {
tft.drawRect(0, 55, 2, 20, FIELD); // Goal 1
tft.drawRect(158, 55, 2, 20, FIELD); // Goal 2
tft.drawRect(80, 71, 1, 59, FIELD); // Center line
tft.drawRect(80, 0, 1, 59, FIELD); // Center line
tft.drawCircle(80, 65, 6, FIELD); // Center circle
}