gem 'ballistics-engine'

require 'ballistics_engine'

# Create ballistic inputs (168gr .308 Winchester)
inputs = BallisticsEngine::BallisticInputs.new(
  0.223,      # BC (G7)
  168.0,      # bullet weight (grains)
  2650.0,     # muzzle velocity (fps)
  0.308,      # bullet diameter (inches)
  1.2,        # bullet length (inches)
  1.5,        # sight height (inches)
  100.0,      # zero distance (yards)
  0.0,        # shooting angle (degrees)
  11.25,      # twist rate (inches)
  true        # right-hand twist
)

# Optional: Add wind conditions
wind = BallisticsEngine::WindConditions.new(
  10.0,       # speed (mph)
  90.0        # direction (degrees, 90 = from right)
)

# Optional: Add atmospheric conditions
atmosphere = BallisticsEngine::AtmosphericConditions.new(
  59.0,       # temperature (F)
  29.92,      # pressure (inHg)
  50.0,       # humidity (%)
  0.0         # altitude (feet)
)

# Create solver and calculate trajectory
solver = BallisticsEngine::TrajectorySolver.new(inputs, wind, atmosphere)
result = solver.solve

# Access results
puts "Max range: #{result.max_range_yards.round(1)} yards"
puts "Time of flight: #{result.time_of_flight.round(3)} seconds"
puts "Impact velocity: #{result.impact_velocity_fps.round(1)} fps"
puts "Impact energy: #{result.impact_energy_ftlbs.round(1)} ft-lbs"

# Iterate through trajectory points
result.points.each do |point|
  puts "Range: #{point.x.round(1)}yd, Drop: #{point.y.round(2)}yd, Velocity: #{point.velocity_fps.round(1)}fps"
end

BallisticInputs.new(
  bc,                       # Ballistic coefficient
  bullet_weight_grains,     # Bullet weight in grains
  muzzle_velocity_fps,      # Muzzle velocity in fps
  bullet_diameter_inches,   # Bullet diameter in inches
  bullet_length_inches,     # Bullet length in inches
  sight_height_inches,      # Sight height in inches
  zero_distance_yards,      # Zero distance in yards
  shooting_angle_degrees,   # Shooting angle in degrees
  twist_rate_inches,        # Barrel twist rate in inches
  is_right_twist            # Right-hand twist? (boolean)
)

WindConditions.new(
  speed_mph,               # Wind speed in mph
  direction_degrees        # Wind direction in degrees (0=headwind, 90=from right)
)

AtmosphericConditions.new(
  temperature_f,           # Temperature in Fahrenheit
  pressure_inhg,           # Pressure in inches of mercury
  humidity_percent,        # Relative humidity (0-100)
  altitude_feet            # Altitude in feet
)

TrajectorySolver.new(
  inputs,                  # BallisticInputs object
  wind = nil,              # WindConditions object (optional)
  atmosphere = nil         # AtmosphericConditions object (optional)
)