/CannonWarfare

Project to learn about real-time physics on projectile simulation, using many params such as drag coeficient, cannonball velocity, barrel length, powder charge, atmospheric pressure and many more...

Primary LanguageC++GNU General Public License v3.0GPL-3.0

Cannon Warfare

Cannon Warfare is a scientific project made within two weeks based on projectiles real time trajectory simulations.
This project displays 2D cannonball's trajectory depending on many variables with many statistics shown.

Preview

Features

  • Real-time simulated cannonballs with:

    • a position
    • a velocity
    • an acceleration
    • display of trajectory
    • a precise timer to get the exact air time
    • bouncing simulation applied upon hitting the ground (see CannonBall.cpp > ApplyBouncingLogic())
    • drag applied at each frame to acceleration using the following formula:

      See this link for more info.
      See CannonBall.cpp > ComputeDrag().

  • Cannonball trajectory prediction with near-perfect accuracy (see Cannon.cpp > UpdateTrajectory())

    • Without drag, this is done instantly by solving the cannonball's movement equation to get its landing position and velocity, then the trajectory is drawn as a bezier curve.
    • With drag, the cannonball's movement equation becomes very hard to solve without iteration. Our solutions were either to use euler's method, or to simulate a cannonball and save its position at regular intervals. We went for the second one since both use iteration and euler's method would grant similar results in similar time frames so it felt like overkill.

  • The cannonball's muzzle velocity is computed using the following formula:

    See this link for more info.
    See Cannon.cpp > ComputeMuzzleVelocity().

  • Cannon recoil is applied using the following formula:

    See this link for more info.
    See Cannon.cpp > ApplyRecoil().

  • Cannonball collisions are applied using the following formula:

    See CannonBall.cpp > CheckCollisions().

  • Tweakable variables:

    • Powder charge
    • Barrel length
    • Projectile radius
    • Projectile mass
    • Cannon height
    • Cannon rotation

  • Toggleable parameters:

    • Apply recoil
    • Apply drag
    • Apply collisions
    • Show predicted trajectory
    • Show predicted measurements
    • Show cannonball trajectories

    Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.