/// <summary>
/// Set ship acceleration to non-zero. Ship also produces particle streams.
/// </summary>
public void ThrottleOn()
{
accX = maxAcceleration * (float)Math.Cos((rotate + 90) * Math.PI / 180);
accY = maxAcceleration * (float)Math.Sin((rotate + 90) * Math.PI / 180);
shipStream.AddParticles(posX, posY, rotate, 10, 10, 5, 2, 8);
shipStream.AddParticles(posX, posY, rotate, 10, 10, 5, 5, 5);
shipStream.AddParticles(posX, posY, rotate, 10, 10, 5, 20, 2);
}
/// <summary>
/// Determines physics for projectiles and its particles for the frame.
/// Projectile is removed if it travels off screen.
/// </summary>
/// <param name="width"></param>
/// <param name="height"></param>
private void CalculateProjectiles(int width, int height)
{
projectileStream.CalculateParticles(DELTA_PROJECTILE_STREAM);
// determine projectiles
for (int i = 0; i < projectiles.Count; i++)
{
// projectile[i][0] = X position of projectile, [1] = Y position of projectile, [2] = rotation of projectile
projectiles[i][0] += projectiles[i][4];
projectiles[i][1] += projectiles[i][5];
projectileStream.AddParticles(projectiles[i][0], projectiles[i][1], 0, 0, 3, 1, 2, 1);
projectileStream.AddParticles(projectiles[i][0], projectiles[i][1], 0, 0, 3, 1, 2, 3);
projectileStream.AddParticles(projectiles[i][0], projectiles[i][1], 0, 0, 3, 1, 1, 5);
if ((projectiles[i][0] < 0) || (projectiles[i][0] > width) || (projectiles[i][1] < 0) || (projectiles[i][1] > height))
{
projectiles.RemoveAt(i);
}
}
}
public void Emit(int count)
{
Particles.AddParticles(ParticleGenerator(count));
}