/// <summary>
/// Renders a collection of particles
/// </summary>
public void RenderParticles( IRenderContext context, IParticleSystem particleSystem )
{
ISerialParticleBuffer sBuffer = ( ISerialParticleBuffer )particleSystem.Buffer;
SerialParticleFieldIterator posIter = new SerialParticleFieldIterator( sBuffer, ParticleBase.Position );
for ( int particleIndex = 0; particleIndex < sBuffer.NumActiveParticles; ++particleIndex )
{
posIter.MoveNext( );
Graphics.Draw.Billboard( s_ParticleBrush, posIter.Point3Value, ParticleSize, ParticleSize );
}
}
/// <summary>
/// Kills particles
/// </summary>
public void KillParticles( IParticleSystem particles )
{
SerialParticleFieldIterator iter = new SerialParticleFieldIterator( ( ISerialParticleBuffer )particles.Buffer, ParticleBase.Age );
for ( int i = 0; i < particles.Buffer.NumActiveParticles; ++i )
{
iter.MoveNext( );
++iter.IntValue;
if ( iter.IntValue > m_DeathAge )
{
particles.Buffer.MarkParticleForRemoval( i );
}
}
particles.Buffer.RemoveMarkedParticles( );
}
/// <summary>
/// Updates all particles
/// </summary>
public void Update( IParticleSystem ps, float updateTime )
{
ISerialParticleBuffer sBuffer = ( ISerialParticleBuffer )ps.Buffer;
SerialParticleFieldIterator posIter = new SerialParticleFieldIterator( sBuffer, ParticleBase.Position );
SerialParticleFieldIterator velIter = new SerialParticleFieldIterator( sBuffer, ParticleBase.Velocity );
Vector3 g = Vector3.YAxis * -Gravity * updateTime;
float fr = 1.0f - Friction;
for ( int particleIndex = 0; particleIndex < sBuffer.NumActiveParticles; ++particleIndex )
{
posIter.MoveNext( );
velIter.MoveNext( );
posIter.Point3Value += velIter.Vector3Value;
posIter.Point3Value += g;
velIter.Vector3Value *= fr;
}
}
/// <summary>
/// Renders a particle system
/// </summary>
public unsafe void RenderParticles( IRenderContext context, IParticleSystem particleSystem )
{
ISerialParticleBuffer sBuffer = ( ISerialParticleBuffer )particleSystem.Buffer;
if ( m_MaxParticles != sBuffer.MaximumNumberOfParticles )
{
BuildBuffers( sBuffer.MaximumNumberOfParticles );
}
using ( IVertexBufferLock vbLock = m_Vb.Lock( 0, sBuffer.NumActiveParticles * 4, false, true ) )
{
Vertex* curVertex = ( Vertex* )vbLock.Bytes;
SerialParticleFieldIterator posIter = new SerialParticleFieldIterator( sBuffer, ParticleBase.Position );
ICamera3 camera = ( ICamera3 )Graphics.Renderer.Camera;
Vector3 xAxis = camera.Frame.XAxis * ParticleSize / 2;
Vector3 yAxis = camera.Frame.YAxis * ParticleSize / 2;
const float maxU = 1.0f;
const float maxV = 1.0f;
for ( int particleIndex = 0; particleIndex < sBuffer.NumActiveParticles; ++particleIndex )
{
posIter.MoveNext( );
curVertex++->Setup( posIter.Point3Value - xAxis - yAxis, 0, 0 );
curVertex++->Setup( posIter.Point3Value + xAxis - yAxis, maxU, 0 );
curVertex++->Setup( posIter.Point3Value + xAxis + yAxis, maxU, maxV );
curVertex++->Setup( posIter.Point3Value - xAxis + yAxis, 0, maxV );
}
}
m_RenderState.Begin( );
if ( m_Texture.Texture != null )
{
Graphics.Renderer.PushTextures( );
m_Texture.Begin( );
}
m_Vb.Begin( );
m_Ib.Draw( PrimitiveType.TriList, 0, sBuffer.NumActiveParticles * 2 );
m_Vb.End( );
if ( m_Texture.Texture != null )
{
m_Texture.End( );
Graphics.Renderer.PopTextures( );
}
m_RenderState.End( );
}
