Basic Anticheat (C)

#include <math.h>

// Struct to represent a 3D vector
typedef struct Vector3 {
  double x;
  double y;
  double z;
} Vector3;

// Function to get the length of a vector
double Vector3_length(Vector3 v) {
  return sqrt(v.x * v.x + v.y * v.y + v.z * v.z);
}

int main() {
  // Declare variables for player position and velocity
  Vector3 playerPos;
  Vector3 playerVel;

  // Set a threshold for maximum allowable velocity
  double maxVel = 10.0;

  // In the player's update function, get their current position and velocity
  playerPos = player_get_position();
  playerVel = player_get_velocity();

  // If the player's velocity is greater than the threshold, reset their velocity to 0
  if (Vector3_length(playerVel) > maxVel) {
    player_set_velocity((Vector3) {0, 0, 0});
    player_send_message("Cheat detected! Your velocity has been reset.");
  }
}