Published September 23, 2022 © GPL3+

Aim and Shoot

Short "bow" game on an adafruit playground express board

BeginnerShowcase (no instructions)43

Things used in this project

Hardware components

Adafruit Circuit Playground Express

Rotary potentiometer (generic)

Alligator Clips

Software apps and online services

Arduino IDE

Story

This is my submission for DIG 3602 FALL 2022

Project 1: Switches and Knobs

The Start:

I started this project with writing the code. The code is attached below. It is a game attempting to emulate a bow shooting game.

Players start at 5 HP and each time an enemy is not shot down, increments down 1 HP. Green is 5 HP, Yellow Green is 4 HP, Yellow is 3 HP, Orange is 2 HP and Red is 1 HP. The 4 lights captioned as enemy are the positions an enemy can be at. Enemies will start to blink with increasing speed until they finally hit the player. Players can shoot enemies by twisting the potentiometer located at the top. The strength of the shot is controlled by how far the knob is twisted and only a perfect aim will fell an enemy. A shot is executed only when players "release the tension of the bowstring" by twisting the knob back to rest position. Players cannot shoot again until the knob is fully at rest position (0), indicated by a yellow light. Once all lives are lost, the lights will show how many points were obtained, 1 for each enemy defeated. Each light indicates 10 points. As you gain points, the game will speed up.

Physical Hardware Integration:

I started with an attempt to carry light with foil inside straws but quickly abandoned the idea. It was getting messy in implementation and was getting hard to see the lights. I decided to just go ahead with a cardboard interface directly on top of the circuit with holes.

Some wiring is hidden behind corners of the top of the box.

Future improvements that I would like to have would be a better interface for the potentiometer; some sort of rebound where the knob will snap back once the knob is released.

Potentiometer Game

#include <Adafruit_CircuitPlayground.h>

int colors[10];
int blinkOrder[] = {2000,1000,1000,1000,500,500,500};
int enemy;
int timer[6];
int blinkCount;
int ticks;
int hp;
int self = 4;
int hpColor[] = {0xFF0000,0xFF9900,0xFFFF00,0x99FF00,0x00FF00};
int knobValue = 0;
int endPixel = -1;
int prevKnobValue = 0;
bool win = false;
bool cd = true;
float diff = .05;
float currDiff;
int score;

void setup() {
  // put your setup code here, to run once:
  CircuitPlayground.begin();
  score = 0;
  hp = 5;
  ticks = 0;
  win = false;
  cd = true;
  currDiff = 0;
  knobValue = 0;
  prevKnobValue = 0;
}

void loop() {
  // put your main code here, to run repeatedly:
  while(hp>0) {
    enemy = random(4);
    colors[enemy] = 0xFF0000;
    CircuitPlayground.setPixelColor(enemy, colors[enemy]);
    timer[enemy] = ticks+2000/(1+currDiff);
    colors[self] = hpColor[hp-1];
    CircuitPlayground.setPixelColor(self, colors[self]);
    while(enemy>=0) {
      knobValue = analogRead(A1);
      if(knobValue == 0) {
        cd = false;
        endPixel = 5;
      }
      for(int x = 0; x < 10; x++) {
        if(x<6 && ticks>timer[x]) {
          if(x==5 && !cd) {
            prevKnobValue = knobValue;
            timer[x] += 100;
          }
          //CircuitPlayground.setPixelColor(x, colors[x]);
          if(x == enemy) {
            if(colors[x] == 0x000000) {
              colors[x] = hpColor[0];
              CircuitPlayground.setPixelColor(x, hpColor[0]);
              if(blinkCount<7) {
                timer[x]+= blinkOrder[blinkCount]/(1+currDiff);
              } else {
                CircuitPlayground.setPixelColor(x, 0x000000);
                enemy = -1;
              }
              blinkCount++;
            } else {
              colors[x] = 0x000000;
              CircuitPlayground.setPixelColor(x, colors[x]);
              timer[x]+= 100;
            }
          } else if(x == 4) {
            if(hpColor[hp-1] != colors[x]) {
              colors[x] = hpColor[hp-1];
              CircuitPlayground.setPixelColor(x, colors[x]);
            }
          }
        } else if(x>5) {
          if(prevKnobValue > knobValue+50) {
            cd = true;
            if(enemy == 4-(int)(prevKnobValue/250) || (enemy == 0 && prevKnobValue > 900)) {
              CircuitPlayground.playTone(1000, 100);
              prevKnobValue = 0;
              CircuitPlayground.setPixelColor(enemy, 0x000000);
              enemy = -1;
              currDiff += diff;
              Serial.println(currDiff);
              win = true;
              score++;
            }
          } else {
            if(x<6+knobValue/250) {
              if(cd) {
                colors[x] = 0xFFFF00;
                CircuitPlayground.setPixelColor(x, colors[x]);
                endPixel = x;
              } else if(colors[x] != 0xFFFFFF) {
                colors[x] = 0xFFFFFF;
                CircuitPlayground.setPixelColor(x, colors[x]);
                endPixel = x;
              }
            } else if(colors[x] != 0x000000) {
                colors[x] = 0x000000;
                CircuitPlayground.setPixelColor(x, colors[x]);
            }
          }
        }
      }
      ticks++;
    }
    if(!win) {
      hp--;
      CircuitPlayground.playTone(500, 100);
    }
    win = false;
    blinkCount = 0;
  }
  CircuitPlayground.playTone(2000, 100);
  for(int x = 0; x < (score/10.0)-1; x++) {
    CircuitPlayground.setPixelColor(x, 0xFFD700);
  }
  bool button1, button2 = false;
  while(1) {
    button1 = CircuitPlayground.rightButton();
    button2 = CircuitPlayground.leftButton();
    if (button1 || button2) {
      for(int x = 0; x <= 9; x++) {
        CircuitPlayground.setPixelColor(x, 0x000000);
      }
      break;
    }
  }
  setup();
}

Credits

Moses kim

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Aim and Shoot

Things used in this project

Hardware components

Software apps and online services

Story

Code

Potentiometer Game

Credits

Moses kim

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Aim and Shoot

Aim and Shoot

Things used in this project

Hardware components

Software apps and online services

Story

Code

Potentiometer Game

Credits

Moses kim

Comments

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