/// <summary>
/// Applies a certain states
/// </summary>
/// <param name="step">The step to apply state for.</param>
public void BeginPass(int step)
{
Device device = Device.Instance;
textures.Apply();
device.Transformations.World = World;
device.Transformations.View = View;
device.Transformations.Projection = Projection;
effect.BeginPass(step);
}
/// <summary>
/// Render the particle system.
/// </summary>
/// <param name="effect">The effect used for rendering the particle system.</param>
public override void Render(IEffect effect)
{
if (particles.Count >= 1)
{
// Render all particles
Device.Instance.VertexUnit = vertexUnit;
Device.Instance.IndexStream = indexStream;
textures.Apply();
effect.CommitChanges();
Device.Instance.DrawIndexed(vertexUnit.Position, 0, particles.Count * 4, indexStream.Position, particles.Count * 2);
}
}
//---------------------------------------------------------------
#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);
// update streams
PositionStream2 posStream = (PositionStream2)vertexUnit[typeof(PositionStream2)];
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;
IParticle2d particle2d = particles[i] as IParticle2d;
if (particle2d != null)
{
Vector2 position = particle2d.Position;
posStream[offset] = position + new Vector2(-particle.Size.X, particle.Size.Y);
posStream[offset + 1] = position + new Vector2(particle.Size.X, particle.Size.Y);
posStream[offset + 2] = position + new Vector2(particle.Size.X, -particle.Size.Y);
posStream[offset + 3] = position + new Vector2(-particle.Size.X, -particle.Size.Y);
}
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();
// Render all particles
Device.Instance.VertexUnit = vertexUnit;
Device.Instance.IndexStream = indexStream;
textures.Apply();
int steps = Effect.Begin();
for (int i = 0; i < steps; i++)
{
Effect.BeginPass(i);
Effect.CommitChanges(); // Oct Update BUG!!!
Device.Instance.DrawIndexed(vertexUnit.Position, 0, particles.Count * 4, indexStream.Position, particles.Count * 2);
Effect.EndPass();
}
Effect.End();
}