I embarked on this project to enhance my interactive and immersive experience with the video game "Hogwarts Legacy," as a devoted Harry Potter fan. Initially, I used a Kano wand and Raspberry Pi Zero to cast spells in the game. Now, my focus had shifted to broom-flying mechanics.
The project is relatively simple. I transformed a Nimbus 2000 Movie Prop Replica into a giant Xbox 360 controller. By using a 6-DOF IMU device (Accelerometer & Gyrometer), I could emulate the joysticks as the brooms flying in-game are controlled in that manner. Once the sensor is mounted, by pulling up the movie prop broom, it would replicate the action in-game. Now for broom propulsion, I noticed the player character's body movements changed at different speeds (leaning forward for "normal speed" and hugging the broom for "turbo/boost speed") so I incorporated a distance-measuring ultrasonic sensor. This sensor allows me to mimic the character's movements, adding to the immersive experience - If I lean towards the sensor, it will trigger the “normal speed” command and my character would mimic my body positioning - allowing the player to feel as if they are the character. I used Dave Madison's Arduino Xinput Library to achieve all this, which enables the Arduino Pro Micro to emulate an Xbox 360 Controller.
In summary, this project combines elements like the Nimbus 2000 Movie Prop Replica, 6-DOF IMU, an Ultrasonic sensor, and an Arduino Pro Micro to heighten the interactive and immersive gameplay of "Hogwarts Legacy."
- A broom for flying. I borrowed a Nimbus 2000 movie prop replica from a mate but you could use any broom you'd like, even a mop if you're keen.
Electronics:
- Arduino Pro Micro
- Adafruit LSM6DS3TR-C 6-DoF Accel + Gyro IMU
- HC-SR04 Ultrasonic Module Distance Measuring Sensor
- Push Button (for resetting the Arduino)
- Jumper Wires
- Tiny Prototyping Breadboard
Mounting:
My code is based on the example code that was provided by Adafruit for the LSM6DS3TR-C sensor. I removed certain elements that were unnecessary. I also added in the setup required for the ultrasonic sensor and Arduino xInput. Three different libraries are required for my code: Arduino Xinput, Adafruit accelerator, NewPing (ultrasonic).
#include#include #include #define TRIGGER_PIN 2 #define ECHO_PIN 3 #define MAX_DISTANCE 500 // For SPI mode, we need a CS pin #define LSM_CS 10 // For software-SPI mode we need SCK/MOSI/MISO pins #define LSM_SCK 13 #define LSM_MISO 12 #define LSM_MOSI 11 NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); int minVal = 265; int maxVal = 402; int mountState = 0; double x; double y; double z; Adafruit_LSM6DS3TRC lsm6ds3trc; void setup(void) { Serial.begin(115200); while (!Serial) delay(10); // will pause Zero, Leonardo, etc until serial console opens Serial.println("Adafruit LSM6DS3TR-C test!"); //if (!lsm6ds3trc.begin_I2C()) { if (!lsm6ds3trc.begin_SPI(LSM_CS)) { Serial.println("Failed to find LSM6DS3TR-C chip"); while (1) { delay(10); } } Serial.println("LSM6DS3TR-C Found!"); // lsm6ds3trc.setAccelRange(LSM6DS_ACCEL_RANGE_2_G); Serial.print("Accelerometer range set to: "); switch (lsm6ds3trc.getAccelRange()) { case LSM6DS_ACCEL_RANGE_2_G: Serial.println("+-2G"); break; case LSM6DS_ACCEL_RANGE_4_G: Serial.println("+-4G"); break; case LSM6DS_ACCEL_RANGE_8_G: Serial.println("+-8G"); break; case LSM6DS_ACCEL_RANGE_16_G: Serial.println("+-16G"); break; } // lsm6ds3trc.setAccelDataRate(LSM6DS_RATE_12_5_HZ); Serial.print("Accelerometer data rate set to: "); switch (lsm6ds3trc.getAccelDataRate()) { case LSM6DS_RATE_SHUTDOWN: Serial.println("0 Hz"); break; case LSM6DS_RATE_12_5_HZ: Serial.println("12.5 Hz"); break; case LSM6DS_RATE_26_HZ: Serial.println("26 Hz"); break; case LSM6DS_RATE_52_HZ: Serial.println("52 Hz"); break; case LSM6DS_RATE_104_HZ: Serial.println("104 Hz"); break; case LSM6DS_RATE_208_HZ: Serial.println("208 Hz"); break; case LSM6DS_RATE_416_HZ: Serial.println("416 Hz"); break; case LSM6DS_RATE_833_HZ: Serial.println("833 Hz"); break; case LSM6DS_RATE_1_66K_HZ: Serial.println("1.66 KHz"); break; case LSM6DS_RATE_3_33K_HZ: Serial.println("3.33 KHz"); break; case LSM6DS_RATE_6_66K_HZ: Serial.println("6.66 KHz"); break; } lsm6ds3trc.configInt1(false, false, true); XInput.setRange(JOY_LEFT, 60, 115); XInput.setRange(JOY_RIGHT, 60, 115); XInput.begin(); } void loop() { // Get a new normalized sensor event sensors_event_t accel; sensors_event_t gyro; sensors_event_t temp; lsm6ds3trc.getEvent(&accel, &gyro, &temp); int xAng = map(accel.acceleration.x, minVal, maxVal, -90, 90); int yAng = map(accel.acceleration.y, minVal, maxVal, -90, 90); int zAng = map(accel.acceleration.z, minVal, maxVal, -90, 90); z = RAD_TO_DEG * (atan2(-accel.acceleration.y, -accel.acceleration.x) + PI); x = RAD_TO_DEG * (atan2(-accel.acceleration.y, -accel.acceleration.z) + PI); y = RAD_TO_DEG * (atan2(-accel.acceleration.x, -accel.acceleration.z) + PI); if (mountState == 0 && ((x >= 80) && (x <= 100)) && (sonar.ping_cm() <= 40)) //to mount the broom, initial mounting needs calibration for person and positioning of sensors on broom - etc. { XInput.press(BUTTON_LB); delay(1002); XInput.press(BUTTON_B); delay(750); XInput.release(BUTTON_LB); XInput.release(BUTTON_B); mountState = 1; delay(100); } if (mountState == 1) //default stuff that should be running once mounted on broom { XInput.setJoystickY(JOY_RIGHT, x, false); XInput.setJoystickX(JOY_RIGHT, (x) , false); XInput.setJoystickX(JOY_LEFT, z, false); XInput.setButton(TRIGGER_RIGHT, ((sonar.ping_cm() >= 2) && (sonar.ping_cm() <= 20))); //normal flight speed XInput.setButton(TRIGGER_LEFT, ((sonar.ping_cm() >= 2) && (sonar.ping_cm() <= 10))); //turbo flight speed if ((x >= 170) || (x <= 10) && (sonar.ping_cm() >= 35 || sonar.ping_cm() == 0)) { XInput.press(BUTTON_B); delay(2000); XInput.release(BUTTON_B); mountState = 0; delay(3000); } } delay(100); }
