Magic 8 Ball

[mwclarkson]

For my first project that wasn't copied and pasted from the excamera site I wrote a Magic 8-Ball simulator.

I'm sure it's not the most efficient, and I've only got 2 randomly selected phrases for now but the hard work is all done.

I'm proud that I managed to master the accelerometer sensor, though, and a timer stops you activating the routine by moving the Gameduino slowly.



#include <EEPROM.h>
#include <SPI.h>
#include <GD2.h>

int maxX,maxY,maxZ;
int minX, minY, minZ;
int rangeX,rangeY,rangeZ;
int timer;

void setup()
{
    Serial.begin(9600);
    timer = 0;
    GD.begin();
}

void loop()
{
    long randNumber;
    GD.Clear();

    // Every 10 steps, reset the min and max values so only a sudden shake is registered
    timer++;
    if (timer > 10) {
        maxX = minX = maxY = minY = maxZ = minZ = 0;
        timer = 0;
    }
    
    // Get accelerometer readings and update the max and min values
    GD.get_inputs();
    int x,y,z;
    GD.get_accel(x,y,z);
    if (x > maxX) { maxX = x; }
    if (x < minX) { minX = x; }
    if (y > maxY) { maxY = y; }
    if (y < minY) { minY = y; }
    if (z > maxZ) { maxZ = z; }
    if (z < minZ) { minZ = z; }

    rangeX = maxX - minX;
    rangeY = maxY - minY;
    rangeZ = maxZ - minZ;

    // If a sudden shake is detected, pick a random message
    if ((rangeX > 300) or (rangeY > 300) or (rangeZ > 300)) {
        maxX = minX = maxY = minY = maxZ = minZ = 0;
        GD.Clear();
        GD.cmd_text(240,136,28,OPT_CENTER,"Interrogating mystical energies");
        GD.swap();
        delay(3000);
        GD.Clear();
        // Only two options right now but trivial to expand
        randNumber = random(2); 
        if (randNumber == 0) {
            GD.cmd_text(240,136,31,OPT_CENTER,"The answer is no!");
        } else {
            GD.cmd_text(240,136,31,OPT_CENTER,"Absomalutely");
        }
        GD.swap();
        delay(3000);
        timer = 0;
    } else {
        GD.cmd_text(240,136,28,OPT_CENTER,"Shake the magic 8-ball");
        GD.swap();
    }
}

[michimac]

Thank you for posting this! I was looking for something simple to catch my kid's attention and this is perfect for them. We will be adding new answers and tweaking it per their instructions.