Scaffolding Mapping: Wheel Game- Analog Team 10

Wheel Game

Our game uses the Circuit Express Playground as a wheel to move one player representing the LED light starting at neo pixel 0 by using an accelerometer. The goal of the game is to turn left and right to reach the goal at the end highlighted as a green neo pixel. The potentiometer functions as a player customization feature. Turning the knobs helps you change into a variety of colors. The breadboard button we used to start the game and end it as well, a glorified on/off button. Whenever the player wins by reaching the goal our circuit plays a little flashing light animation and restarts the game. 

1. #include <Adafruit_CircuitPlayground.h> #include <math.h> // Rotation tracking float lastAngle = 0; float threshold = 22.0; // Degrees of rotation needed to move one space // Game variables int playerPos = 0; // Player starts at the first LED int goalPos = 9; // Goal starts at the last LED // Pot + Button pins const int POT_PIN = A2; const int BUTTON_PIN = A3; // Goal color storage byte goalR = 0, goalG = 255, goalB = 0; // Starts green // Convert 0-255 value into an RGB "rainbow wheel" color void wheelColor(byte wheelPos, byte &r, byte &g, byte &b) { wheelPos = 255 - wheelPos; if (wheelPos < 85) { r = 255 - wheelPos * 3; g = 0; b = wheelPos * 3; } else if (wheelPos < 170) { wheelPos -= 85; r = 0; g = wheelPos * 3; b = 255 - wheelPos * 3; } else { wheelPos -= 170; r = wheelPos * 3; g = 255 - wheelPos * 3; b = 0; } } void randomizeGoal() { // Randomize goal position (avoid landing on player to prevent instant win) int newGoal = random(0, 10); while (newGoal == playerPos) { newGoal = random(0, 10); } goalPos = newGoal; // Randomize goal color (random hue) byte wheelPos = (byte)random(0, 256); wheelColor(wheelPos, goalR, goalG, goalB); } void setup() { Serial.begin(9600); CircuitPlayground.begin(); CircuitPlayground.setBrightness(5); // Button input (external pulldown resistor used) pinMode(BUTTON_PIN, INPUT); // Seed Randomness (So goal isn't the same every reset) randomSeed(CircuitPlayground.lightSensor() + millis()); // Starting Angle float x = CircuitPlayground.motionX(); float y = CircuitPlayground.motionY(); lastAngle = atan2(y, x) * 180 / PI; } void loop() { // Button Randomizer (Goal Only) static bool prevButton = false; bool buttonNow = (digitalRead(BUTTON_PIN) == HIGH); // Rising edge detect if (buttonNow && !prevButton) { randomizeGoal(); } prevButton = buttonNow; // POT Color Value int potValue = analogRead(POT_PIN); // 0..1023 byte wheelPos = map(potValue, 0, 1023, 0, 255); // 0..255 byte pr, pg, pb; wheelColor(wheelPos, pr, pg, pb); // Rotational formula float x = CircuitPlayground.motionX(); float y = CircuitPlayground.motionY(); float currentAngle = atan2(y, x) * 180 / PI; float delta = currentAngle - lastAngle; if (delta > 180) delta -= 360; if (delta < -180) delta += 360; if (abs(delta) > threshold) { if (delta > 0) playerPos++; else playerPos--; if (playerPos < 0) playerPos = 0; if (playerPos > 9) playerPos = 9; lastAngle = currentAngle; } // Clear Neo Pixels CircuitPlayground.clearPixels(); // Goal LED (random color) CircuitPlayground.setPixelColor(goalPos, goalR, goalG, goalB); // Player LED (pot-controlled color), don't overwrite goal LED if (playerPos != goalPos) { CircuitPlayground.setPixelColor(playerPos, pr, pg, pb); } // Win State if (playerPos == goalPos) { for (int i = 0; i < 3; i++) { CircuitPlayground.clearPixels(); delay(200); for (int p = 0; p < 10; p++) { CircuitPlayground.setPixelColor(p, goalR, goalG, goalB); // flash goal color } delay(200); } playerPos = 0; // Re-calibrate angle x = CircuitPlayground.motionX(); y = CircuitPlayground.motionY(); lastAngle = atan2(y, x) * 180 / PI; } delay(50); }