/// <summary>
/// Fires the projectile in a line from the ship, straight.
/// </summary>
/// <param name="proj"></param>
private void updateProjectileLocation(projectile proj, star starry)
{
if (bulletGravity == false)
{
Vector2D direction = proj.GetDirections(); // We have the direction
direction *= projectileSpeed;
proj.loc = proj.loc + direction;// Apply new velocity to position.
checkIfOffScreen(proj, touhouMode);
}
else
{
Vector2D gravity = starry.loc - proj.loc; // Find the vector from the ship to the star.
gravity.Normalize(); // Turn the vector into a unit-length direction by normalizing.
gravity *= starry.mass; // Adjust strentth of vector by multiplying star's mass.
Vector2D thrust = new Vector2D(0, 0); // no thrust for you.
Vector2D acceleration = gravity + thrust; // combine all forces.
proj.velocity += acceleration; // Add acceleration to velocity.
proj.loc = proj.loc + proj.velocity; // Apply new velocity to position.
checkIfOffScreen(proj, touhouMode); // Wraparound if offscreen.
}
}
// This method is invoked when the DrawingPanel needs to be re-drawn
/// <summary>
/// Draws all the players, stars and projectiles each time the form is invalidated.
/// The lock is used so cross-threads can't screw it up!
/// </summary>
/// <param name="e"></param>
protected override void OnPaint(PaintEventArgs e)
{
// Draw the players
// Draw the stars
// Draw the projectiles.
lock (world)
{
foreach (var shipper in world.playersInWorld.ToList())
{
ship p = shipper.Value as ship;
if (p.hp > 0) // If the HP is above zero, the ship deserves to be drawn.
{
DrawObjectWithTransform(e, p, world.worldPanel.Size.Width, p.GetLocation().GetX(), p.GetLocation().GetY(), p.GetDirections().ToAngle(), shipDrawer);
}
}
foreach (var starry in world.starsInWorld.ToList())
{
star p = starry.Value as star;
DrawObjectWithTransform(e, p, world.worldPanel.Size.Width, p.GetLocation().GetX(), p.GetLocation().GetY(), 0, starDrawer);
}
foreach (var proj in world.projectilesInWorld.ToList())
{
projectile p = proj.Value as projectile;
if (p.alive == true)
{
DrawObjectWithTransform(e, p, world.worldPanel.Size.Width, p.GetLocation().GetX(), p.GetLocation().GetY(), p.GetDirections().ToAngle(), projectileDrawer);
}
else // If it's dead, can be removed from the projectile list.
{
world.projectilesInWorld.Remove(p.ID);
}
}
}
// Do anything that Panel (from which we inherit) needs to do
base.OnPaint(e);
}