/// <summary>
/// Each time CalculateStreams() is called an updated frame of what the explosion should render as is calculated.
/// </summary>
/// <param name="rotation">How much it is rotated from the object it originated from.</param>
/// <param name="NumberOfStreams">Invariant: Number must always be odd.</param>
/// <param name="degreesOfSpan">How wide is the explosion (360 is a complete circle).</param>
/// <param name="strengthOfBlast">Determines size, length, and lifetime of blast.</param>
public Explosion(float startPositionX, float startPositionY, float rotation, int NumberOfStreams, float degreesOfSpan, float strengthOfBlast)
{
particles = new Particles();
// color of the explosion as RGB
color = new byte[] {255, 170, 40};
Random randomator = new Random();
streams = new List<float[]>();
float degreeChange = 0;
float halfWindow = 0;
if (degreesOfSpan > 0 && NumberOfStreams > 1)
{
degreeChange = degreesOfSpan / (NumberOfStreams - 1);
halfWindow = degreesOfSpan / 2;
}
for (int i = 0; i < NumberOfStreams; i++)
{
float degree = -halfWindow + i * (degreeChange) + rotation + 180;
// { ... , ... , where does it start, lifeTime , width
streams.Add(new float[] { startPositionX, startPositionY, degree, (strengthOfBlast + randomator.Next((int) -(strengthOfBlast/3), (int) (strengthOfBlast/3 )))});
}
strength = strengthOfBlast;
}
/// <summary>
/// Renders a given particle list. The particles takes on the color given in the parameter.
/// </summary>
/// <param name="particles"></param>
private static void RenderParticles(Particles particles)
{
List<float[]> streams = particles.RenderParticles();
byte[] color = particles.Color;
GL.LoadIdentity();
foreach (float[] stream in streams)
{
float particleSize = stream[5];
GL.Color4(color[0] / 255, color[0] / 255, color[0] / 255, stream[4]);
GL.BindTexture(TextureTarget.Texture2D, explosionTex);
GL.Begin(PrimitiveType.Quads);
GL.TexCoord2(0, 0);
GL.Vertex2(stream[0] - particleSize, stream[1] + particleSize);
GL.TexCoord2(1, 0);
GL.Vertex2(stream[0] + particleSize, stream[1] + particleSize);
GL.TexCoord2(1, 1);
GL.Vertex2(stream[0] + particleSize, stream[1] - particleSize);
GL.TexCoord2(0, 1);
GL.Vertex2(stream[0] - particleSize, stream[1] - particleSize);
GL.End();
GL.BindTexture(TextureTarget.Texture2D, 0);
}
}
/// <summary>
/// Construct a ship with given initial specs.
/// </summary>
/// <param name="VEL">Maximum Velocity</param>
/// <param name="ACC">Maximum Acceleration</param>
/// <param name="ROT_VEL">Maximum Rotational Velocity</param>
/// <param name="ROT_ACC">Maximum Rotational Acceleration</param>
public ShipDrone(float VEL, float ACC, float ROT_VEL, float ROT_ACC, float shipSize, float shipStartingHealth, int shipStartingLives)
{
SetShipMovement(VEL, ACC, ROT_VEL, ROT_ACC);
radius = shipSize;
canFire = false;
isHit = false;
idNumber = 0;
shipMass = shipSize;
sColor = WHITE;
pColor = WHITE;
shipStream = new Particles();
projectileStream = new Particles();
maxShipHealth = shipStartingHealth;
maxShipLives = shipStartingLives;
shipHealth = maxShipHealth;
shipLives = maxShipLives;
freeze = true;
}
