// We need these libraries installed from library manager
#include <Adafruit_NeoPixel.h>
#include "OneButton.h"
// What GPIO is the strip connected to
#define PIXELPIN 4
// How many NeoPixels in the strip
#define NUMPIXELS 60
// What GPIO is the button connected to?
#define BUTTON_TAP 6
// Initialise the button, with a default low
OneButton buttonTAP(BUTTON_TAP, true);
// Initialise the pixel strip
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIXELPIN, NEO_GRB + NEO_KHZ800);
// A bunch of variables
int playerIndex = -1;
int playerIndexTrail = -2;
int playerDirection = 1;
float nextMove = 0;
float currentPlayerSpeed = 190;
unsigned long countdown = 0;
int enemyIndex = -1;
int coinIndex = -1;
int score = 0;
int bestScore = 0;
int lastScore = 0;
bool gameOver = false;
void setup()
{
// make the button pin an input
pinMode( BUTTON_TAP, INPUT_PULLUP );
// Attatch click functions to the button
buttonTAP.attachClick(singleClick);
buttonTAP.attachLongPressStart(longClick);
// Initialise the strip and set it's brightness to 20%
pixels.begin();
pixels.setBrightness(50);
// set a 2 second countdown before the player appears and starts moving
countdown = millis() + 2000;
}
void loop()
{
// Every cycle we need to tick the button state
buttonTAP.tick();
// If the game is in game over state, exit loop early
if ( gameOver )
return;
// Set the pixel display state of the level
// This sets the enemy position and the coin position
SetLevel();
// wait for a second for the player to get ready
if ( countdown > millis() )
{
pixels.show();
return;
}
// All the player display, movement and game logic is in here
DisplayPlayer();
// This sends the updated pixel color to the hardware.
pixels.show();
}
// Clear the level, setting all pixels to black
void ClearLevel()
{
for(int i=0;i<NUMPIXELS;i++)
pixels.setPixelColor(i, pixels.Color(0,0,0)); // Moderately bright green color.
//rainbow
pixels.show();
}
//random(1, 150),random(1, 255),random(150, 255)
// Show the best score in yellow and if the last score was less than the best, show that on top in red
void BestScore()
{
// Best score in yellow
for(int i=0;i<NUMPIXELS;i++)
{
if ( i < bestScore )
pixels.setPixelColor(i, pixels.Color(255,0,0 )); // Moderately bright green color.
else
pixels.setPixelColor(i, pixels.Color(0,0,0));
}
// last score is less than best is in red
if ( lastScore < bestScore )
{
for(int i=0;i<lastScore;i++)
pixels.setPixelColor(i, pixels.Color(255,0,0)); // Moderately bright green color.
}
pixels.show();
}
// Game over animation
void GameOver()
{
// First pass we animate the strip going red from the enemy position
int a = enemyIndex;
int b = enemyIndex;
for(int i=0;i<NUMPIXELS/2;i++)
{
pixels.setPixelColor(a, pixels.Color(255,0,0)); // Moderately bright green color.
pixels.setPixelColor(b, pixels.Color(255,0,0)); // Moderately bright green color.
a = ( a + 1) % NUMPIXELS;
b--;
if ( b == -1 )
b = NUMPIXELS;
pixels.show();
delay(20);
}
delay(100);
// Second pass we animate the strip going back from the enemy position
a = enemyIndex;
b = enemyIndex;
for(int i=0;i<NUMPIXELS/2;i++)
{
pixels.setPixelColor(a, pixels.Color(0,0,0)); // Black
pixels.setPixelColor(b, pixels.Color(0,0,0)); // Black
a = ( a + 1) % NUMPIXELS;
b--;
if ( b == -1 )
b = NUMPIXELS;
pixels.show();
delay(20);
}
// Now we show the best score
delay(100);
BestScore();
}
// Setup the level including the postiion of the enemy and the coin
void SetLevel()
{
// If the enemy position is -1 (has been reset)
// Find a new position for the enemy
if ( enemyIndex < 0 )
{
// I fthe player not playing, always start the enemy at the half strip position
if ( playerIndex < 0 )
{
enemyIndex = NUMPIXELS / 2;
}
// The player is in the game, so make sure not to place the enemy on or too close to the player
else
{
enemyIndex = random(0, NUMPIXELS);
while ( abs(enemyIndex - playerIndex ) < ( NUMPIXELS / 4 ) )
enemyIndex = random(0, NUMPIXELS);
}
}
// If the coin position is -1 (has been reset)
// Find a new position for the coin
if ( coinIndex < 0 )
{
coinIndex = random(0, NUMPIXELS);
// pick a coin position somewhere between the player and enemy
while ( abs(coinIndex - playerIndex ) < 7 || ( abs(coinIndex - enemyIndex ) < 7 ) )
coinIndex = random(0, NUMPIXELS);
}
pixels.setPixelColor(enemyIndex, pixels.Color(255,10,0));
pixels.setPixelColor(coinIndex, pixels.Color(255,255,0));
}
// This is where all the magic happens
// Player movement happens here as well as game logic for collecting coins or hitting the enemy
void DisplayPlayer()
{
if ( nextMove < millis() )
{
nextMove = millis() + currentPlayerSpeed;
// The player has a visual trail, so these next 2 if statements shows or clears the trail
if ( playerIndexTrail >= 0 )
pixels.setPixelColor(playerIndexTrail, pixels.Color(random(1, 70), random(1, 160), random(200, 255)));
if ( playerIndex >= 0)
{
pixels.setPixelColor(playerIndex, pixels.Color(255, 0, 255));
// second dot player
playerIndexTrail = playerIndex;
}
// Move the player in their current direction
playerIndex += playerDirection;
// Wrap the player at the strip edges
if ( playerIndex < 0 )
playerIndex = NUMPIXELS - 1;
else if ( playerIndex == NUMPIXELS )
playerIndex = 0;
pixels.setPixelColor(playerIndex, pixels.Color(0, 255, 0));
//142, 255, 10 player dot
// Did the player hit the coin?
// If so, increase the score, reset coin and enemy positions and clear the level
// Next loop the SetLevel() will reset the enemy and coin
// Player speed is also increased for every coin hit
if ( playerIndex == coinIndex )
{
enemyIndex = -1;
coinIndex = -1;
score++;
currentPlayerSpeed = constrain( currentPlayerSpeed - 5, 15, 130 );
ClearLevel();
pixels.setPixelColor(playerIndex, pixels.Color(0, 0, 255));
}
// 142, 255, 10
// Did the player hit the enemy?
// Set the last/best score and call game over
else if ( playerIndex == enemyIndex )
{
lastScore = score;
if ( score >= bestScore )
bestScore = score;
GameOver();
gameOver = true;
enemyIndex = -1;
coinIndex = -1;
playerIndex = -1;
}
}
}
// Single button click
void singleClick()
{
// No input until player is visible
if ( countdown > millis() )
return;
// switch the player direction
playerDirection = -playerDirection;
}
// Long button click
void longClick()
{
// Switch game over state
// If it was game over, start the game, otherwise cancel a game in progress
gameOver = !gameOver;
if ( gameOver )
{
enemyIndex = -1;
coinIndex = -1;
playerIndex = -1;
currentPlayerSpeed = 190;
ClearLevel();
}
else
{
ClearLevel();
score = 0;
currentPlayerSpeed = 190;
countdown = millis() + 2000;
}
}