private bool Gravity_None_Linear(CanvasDrawingSession context, Drop drop)
{
if (ClearDrop(context, drop))
{
return true;
}
if (drop.Collided)
{
drop.Collided = false;
drop.Seed = (float)Math.Floor(drop.R * ((float)random.NextDouble()) * fps);
drop.Skipping = false;
drop.Slowing = false;
}
else if (drop.Seed == 0 || drop.Seed < 0)
{
drop.Seed = (float)Math.Floor(drop.R * random.NextDouble() * fps);
drop.Skipping = drop.Skipping == false ? true : false;
drop.Slowing = true;
}
drop.Seed--;
if (drop.Yspeed != 0)
{
if (drop.Slowing)
{
drop.Yspeed /= 1.1f;
drop.Xspeed /= 1.1f;
if (drop.Yspeed < gravity_force_factor_Y)
{
drop.Slowing = false;
}
}
else if (drop.Skipping)
{
drop.Yspeed = gravity_force_factor_Y;
drop.Xspeed = gravity_force_factor_X;
}
else
{
drop.Yspeed += 1 * gravity_force_factor_Y * (float)Math.Floor(drop.R);
drop.Xspeed += 1 * gravity_force_factor_X * (float)Math.Floor(drop.R);
}
}
else
{
drop.Yspeed = gravity_force_factor_Y;
drop.Xspeed = gravity_force_factor_X;
}
if (gravityAngleVariance != 0)
{
drop.Xspeed += ((float)(random.NextDouble() * 2 - 1) * drop.Yspeed * gravityAngleVariance);
}
drop.Y += drop.Yspeed;
drop.X += drop.Xspeed;
drop.Draw(this, context);
return false;
}
private bool Gravity_Linear(CanvasDrawingSession context, Drop drop)
{
if (ClearDrop(context, drop))
{
return true;
}
if (drop.Yspeed != 0)
{
drop.Yspeed += gravity_force_factor_Y * (float)Math.Floor(drop.R);
drop.Xspeed += gravity_force_factor_X * (float)Math.Floor(drop.R);
}
else
{
drop.Yspeed = gravity_force_factor_Y;
drop.Xspeed = gravity_force_factor_X;
}
drop.X += drop.Xspeed;
drop.Y += drop.Yspeed;
drop.Draw(this, context);
return false;
}
/// <summary>
/// Adds a new raindrop to the animation.
/// </summary>
/// <param name="context">context</param>
/// <param name="drop">drop object to be added to the animation</param>
private void PutDrop(CanvasDrawingSession context, Drop drop)
{
drop.Draw(this, context);
if (Gravity != null && drop.R > gravityThreshold)
{
if (enableCollisions)
{
matrix.Update(drop, false);
}
drops.Add(drop);
}
}
