//---------------------------------------------------------------
#endregion
//---------------------------------------------------------------
//---------------------------------------------------------------
#region Methods
//---------------------------------------------------------------
/// <summary>
/// Updates the particle system.
/// </summary>
/// <param name="deltaTime">The time since the last update.</param>
public override void Update(float deltaTime)
{
base.Update(deltaTime);
Matrix4 m = Device.Instance.Transformations.View;
Vector3 right = m.RightVector;
Vector3 up = m.UpVector;
// update streams
PositionStream posStream = (PositionStream)vertexUnit[typeof(PositionStream)];
ColorStream colorStream = (ColorStream)vertexUnit[typeof(ColorStream)];
TextureStream textureStream = (TextureStream)vertexUnit[typeof(TextureStream)];
// Update all particles
for (int i = 0; i < particles.Count; i++)
{
int offset = i * 4;
IParticle particle = particles[i] as IParticle;
IParticle3d particle3d = particles[i] as IParticle3d;
if (particle3d != null)
{
Vector3 position = particle3d.Position;
posStream[offset] = position - particle.Size.X * right + particle.Size.Y * up;
posStream[offset + 1] = position + particle.Size.X * right + particle.Size.Y * up;
posStream[offset + 2] = position + particle.Size.X * right - particle.Size.Y * up;
posStream[offset + 3] = position - particle.Size.X * right - particle.Size.Y * up;
}
IParticleColor particleColor = particles[i] as IParticleColor;
if (particleColor != null)
{
colorStream[offset] = particleColor.Color;
colorStream[offset + 1] = particleColor.Color;
colorStream[offset + 2] = particleColor.Color;
colorStream[offset + 3] = particleColor.Color;
}
IParticleIndex particleIndex = particles[i] as IParticleIndex;
System.Drawing.RectangleF tc;
if (particleIndex == null || subTextures == null)
{
tc = (Texture as ITexture2d).TextureCoordinates;
}
else
{
tc = subTextures[(int)particleIndex.TextureIndex % subTextures.Length].TextureCoordinates;
}
textureStream[offset] = new Vector2(tc.Left, tc.Top);
textureStream[offset + 1] = new Vector2(tc.Right, tc.Top);
textureStream[offset + 2] = new Vector2(tc.Right, tc.Bottom);
textureStream[offset + 3] = new Vector2(tc.Left, tc.Bottom);
}
posStream.Upload();
colorStream.Upload();
textureStream.Upload();
}
//---------------------------------------------------------------
#endregion
//---------------------------------------------------------------
//---------------------------------------------------------------
#region Methods
//---------------------------------------------------------------
/// <summary>
/// Updates the particle system.
/// </summary>
/// <param name="deltaTime">The time since the last update.</param>
public override void Update(float deltaTime)
{
UpdateAge(deltaTime);
// delete dead particles
FixedRoundBuffer buffer = particles as FixedRoundBuffer;
while (buffer.Count > 0 && !(buffer[0] as IParticle).IsAlive)
{
buffer.RemoveFirst();
}
UpdateParticles(deltaTime);
EmitParticles(deltaTime);
ITexture2d texture = Texture;
if (particles.Count >= 2)
{
// update streams
PositionStream posStream = (PositionStream)vertexUnit[typeof(PositionStream)];
ColorStream colorStream = (ColorStream)vertexUnit[typeof(ColorStream)];
TextureStream textureStream = (TextureStream)vertexUnit[typeof(TextureStream)];
// Update all particles
for (int i = 0; i < particles.Count; i++)
{
int offset = i * 2;
IParticle particle = particles[i] as IParticle;
IParticle3d particle3d = particles[i] as IParticle3d;
if (particle3d != null)
{
Vector3 position = particle3d.Position;
posStream[offset] = position + particle.Size.X * (particle as IParticleOrientation).Orientation;
posStream[offset + 1] = position - particle.Size.X * (particle as IParticleOrientation).Orientation;
}
IParticleColor particleColor = particles[i] as IParticleColor;
if (particleColor != null)
{
colorStream[offset] = particleColor.Color;
colorStream[offset + 1] = particleColor.Color;
}
float tx = texture.TextureCoordinates.Left + texture.TextureCoordinates.Width * particle.Age / particle.LifeTime;
textureStream[offset] = new Vector2(tx, texture.TextureCoordinates.Top);
textureStream[offset + 1] = new Vector2(tx, texture.TextureCoordinates.Bottom);
}
posStream.Upload();
colorStream.Upload();
textureStream.Upload();
}
}
/// <summary>
/// Sets the position of the particle.
/// </summary>
/// <param name="particle">Particle for which to set position.</param>
/// <param name="position">Position to set.</param>
public static void SetPosition(IParticle particle, Vector3 position)
{
IParticle3d p3d = (particle as IParticle3d);
if (p3d != null)
{
p3d.Position = position;
}
else
{
IParticle2d p2d = (particle as IParticle2d);
if (p2d != null)
{
p2d.Position = position.Vector2;
}
}
}
