protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single deltaPitch = this.RotationRate.X * deltaSeconds;
Single deltaYaw = this.RotationRate.Y * deltaSeconds;
Single deltaRoll = this.RotationRate.Z * deltaSeconds;
var particle = iterator.First;
do
{
#if UNSAFE
particle->Rotation.X += deltaPitch;
particle->Rotation.Y += deltaYaw;
particle->Rotation.Z += deltaRoll;
#else
particle.Rotation.X += deltaPitch;
particle.Rotation.Y += deltaYaw;
particle.Rotation.Z += deltaRoll;
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single initialForceDeltaX = this.InitialForce.X * deltaSeconds;
Single initialForceDeltaY = this.InitialForce.Y * deltaSeconds;
Single initialForceDeltaZ = this.InitialForce.Z * deltaSeconds;
Single finalForceDeltaX = this.FinalForce.X * deltaSeconds;
Single finalForceDeltaY = this.FinalForce.Y * deltaSeconds;
Single finalForceDeltaZ = this.FinalForce.Z * deltaSeconds;
var particle = iterator.First;
do
{
#if UNSAFE
particle->Velocity.X += initialForceDeltaX + ((finalForceDeltaX - initialForceDeltaX) * particle->Age);
particle->Velocity.Y += initialForceDeltaY + ((finalForceDeltaY - initialForceDeltaY) * particle->Age);
particle->Velocity.Z += initialForceDeltaZ + ((finalForceDeltaZ - initialForceDeltaZ) * particle->Age);
#else
particle.Velocity.X += initialForceDeltaX + ((finalForceDeltaX - initialForceDeltaX) * particle.Age);
particle.Velocity.Y += initialForceDeltaY + ((finalForceDeltaY - initialForceDeltaY) * particle.Age);
particle.Velocity.Z += initialForceDeltaZ + ((finalForceDeltaZ - initialForceDeltaZ) * particle.Age);
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single inverseCoefficientDelta = -(this.DampingCoefficient * deltaSeconds);
var particle = iterator.First;
do
{
#if UNSAFE
particle->Velocity.X += particle->Velocity.X * inverseCoefficientDelta;
particle->Velocity.Y += particle->Velocity.Y * inverseCoefficientDelta;
particle->Velocity.Z += particle->Velocity.Z * inverseCoefficientDelta;
#else
particle.Velocity.X += particle.Velocity.X * inverseCoefficientDelta;
particle.Velocity.Y += particle.Velocity.Y * inverseCoefficientDelta;
particle.Velocity.Z += particle.Velocity.Z * inverseCoefficientDelta;
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Vector3 initialColour = this.InitialColour;
Vector3 delta = this.FinalColour - initialColour;
var particle = iterator.First;
do
{
#if UNSAFE
particle->Colour.X = (initialColour.X + (delta.X * particle->Age));
particle->Colour.Y = (initialColour.Y + (delta.Y * particle->Age));
particle->Colour.Z = (initialColour.Z + (delta.Z * particle->Age));
#else
particle.Colour.X = (initialColour.X + (delta.X * particle.Age));
particle.Colour.Y = (initialColour.Y + (delta.Y * particle.Age));
particle.Colour.Z = (initialColour.Z + (delta.Z * particle.Age));
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single deltaStrength = this.Strength * deltaSeconds;
Single deltaGravityX = this.GravityVector.X * deltaStrength;
Single deltaGravityY = this.GravityVector.Y * deltaStrength;
Single deltaGravityZ = this.GravityVector.Z * deltaStrength;
var particle = iterator.First;
do
{
#if UNSAFE
particle->Velocity.X += deltaGravityX;
particle->Velocity.Y += deltaGravityY;
particle->Velocity.Z += deltaGravityZ;
#else
particle.Velocity.X += deltaGravityX;
particle.Velocity.Y += deltaGravityY;
particle.Velocity.Z += deltaGravityZ;
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
var particle = iterator.First;
do
{
#if UNSAFE
Single age = particle->Age;
#else
Single age = particle.Age;
#endif
if (age < this.Median)
#if UNSAFE
particle->Colour.W = this.InitialOpacity + ((this.MedianOpacity - this.InitialOpacity) * (age / this.Median));
#else
particle.Colour.W = this.InitialOpacity + ((this.MedianOpacity - this.InitialOpacity) * (age / this.Median));
#endif
else
#if UNSAFE
particle->Colour.W = this.MedianOpacity + ((this.FinalOpacity - this.MedianOpacity) * ((age - this.Median) / (1f - this.Median)));
#else
particle.Colour.W = this.MedianOpacity + ((this.FinalOpacity - this.MedianOpacity) * ((age - this.Median) / (1f - this.Median)));
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
public unsafe ParticleBuffer(int size)
{
Size = size;
// add one extra spot in memory for margin between head and tail
// so the iterator can see that it's at the end
_nativePointer = Marshal.AllocHGlobal(SizeInBytes);
BufferEnd = (Particle*)(_nativePointer + SizeInBytes);
Head = (Particle*)_nativePointer;
Tail = (Particle*)_nativePointer;
_iterator = new ParticleIterator(this);
GC.AddMemoryPressure(SizeInBytes);
}
/// <summary>
/// Performs rendering of particles.
/// </summary>
/// <param name="iterator">The particle iterator object.</param>
/// <param name="context">The render context containing rendering information.</param>
protected override void Render(ref RenderContext context, ref ParticleIterator iterator)
{
Vector2 origin = new Vector2(context.Texture.Width / 2f, context.Texture.Height / 2f);
this.SpriteBatch.Begin(SpriteSortMode.Deferred, context.BlendState, SamplerState.PointClamp, DepthStencilState.None, RasterizerState.CullNone, null, this.Transformation);
{
#if UNSAFE
unsafe
{
Particle* particle = iterator.First;
#else
Particle particle = iterator.First;
#endif
do
{
#if UNSAFE
Single scale = particle->Scale / context.Texture.Width;
Vector2 position = new Vector2
{
X = particle->Position.X,
Y = particle->Position.Y
};
this.SpriteBatch.Draw(context.Texture, position, null, new Color(particle->Colour), particle->Rotation.Z, origin, scale, SpriteEffects.None, 0f);
#else
Single scale = particle.Scale / context.Texture.Width;
Vector2 position = new Vector2
{
X = particle.Position.X,
Y = particle.Position.Y
};
this.SpriteBatch.Draw(context.Texture, position, null, new Color(particle.Colour), particle.Rotation.Z, origin, scale, SpriteEffects.None, 0f);
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
#if UNSAFE
}
#endif
this.SpriteBatch.End();
}
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single squareRadius = (this.Radius * this.Radius);
Single deltaStrength = this.Strength * deltaSeconds;
Single deltaForceX = this.ForceVector.X * deltaStrength;
Single deltaForceY = this.ForceVector.Y * deltaStrength;
Single deltaForceZ = this.ForceVector.Z * deltaStrength;
Vector3 forcePosition = this.Position;
var particle = iterator.First;
do
{
#if UNSAFE
Vector3 position = particle->Position;
#else
Vector3 position = particle.Position;
#endif
Single distanceX = forcePosition.X - position.X;
Single distanceY = forcePosition.Y - position.Y;
Single distanceZ = forcePosition.Z - position.Z;
Single squareDistance = ((distanceX * distanceX) + (distanceY * distanceY) + (distanceZ * distanceZ));
if (squareDistance < squareRadius)
{
#if UNSAFE
particle->Velocity.X += deltaForceX;
particle->Velocity.Y += deltaForceY;
particle->Velocity.Z += deltaForceZ;
#else
particle.Velocity.X += deltaForceX;
particle.Velocity.Y += deltaForceY;
particle.Velocity.Z += deltaForceZ;
#endif
}
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single h = ((this.HueShift * deltaSeconds) * Calculator.Pi) / 180f;
Single u = Calculator.Cos(h);
Single w = Calculator.Sin(h);
Matrix hueTransform = new Matrix(1f, 0f, 0f, 0f,
0f, u, -w, 0f,
0f, w, u, 0f,
0f, 0f, 0f, 1f);
var particle = iterator.First;
#if UNSAFE
Vector4 colour = particle->Colour;
#else
Vector4 colour = particle.Colour;
#endif
do
{
// Convert the current colour of the particle to YIQ colour space...
Vector4.Transform(ref colour, ref HueShiftModifier.YiqTransform, out colour);
// Transform the colour in YIQ space...
Vector4.Transform(ref colour, ref hueTransform, out colour);
// Convert the colour back to RGB space...
Vector4.Transform(ref colour, ref HueShiftModifier.RgbTransform, out colour);
#if UNSAFE
particle->Colour.X = colour.X;
particle->Colour.Y = colour.Y;
particle->Colour.Z = colour.Z;
#else
particle.Colour.X = colour.X;
particle.Colour.Y = colour.Y;
particle.Colour.Z = colour.Z;
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
var particle = iterator.First;
do
{
#if UNSAFE
particle->Scale = this.InitialScale + ((this.FinalScale - this.InitialScale) * particle->Age);
#else
particle.Scale = this.InitialScale + ((this.FinalScale - this.InitialScale) * particle.Age);
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single w;
Vector3 x, y;
var particle = iterator.First;
do
{
#if UNSAFE
Single age = particle->Age;
#else
Single age = particle.Age;
#endif
if (age < this.Median)
{
x = this.InitialColour;
y = this.MedianColour;
w = age / this.Median;
}
else
{
x = this.MedianColour;
y = this.FinalColour;
w = (age - this.Median) / (1f - this.Median);
}
#if UNSAFE
particle->Colour.X = x.X + ((y.X - x.X) * w);
particle->Colour.Y = x.Y + ((y.Y - x.Y) * w);
particle->Colour.Z = x.Z + ((y.Z - x.Z) * w);
#else
particle.Colour.X = x.X + ((y.X - x.X) * w);
particle.Colour.Y = x.Y + ((y.Y - x.Y) * w);
particle.Colour.Z = x.Z + ((y.Z - x.Z) * w);
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
var particle = iterator.First;
do
{
#if UNSAFE
particle->Colour.W = this.InitialOpacity - (this.InitialOpacity * particle->Age);
#else
particle.Colour.W = this.InitialOpacity - (this.InitialOpacity * particle.Age);
#endif
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single squareMaximumVelocity = (this.MaximumVelocity * this.MaximumVelocity);
var particle = iterator.First;
do
{
#if UNSAFE
Vector3 velocity = particle->Velocity;
#else
Vector3 velocity = particle.Velocity;
#endif
Single squareVelocity = ((velocity.X * velocity.X) +
(velocity.Y * velocity.Y) +
(velocity.Z * velocity.Z));
if (squareVelocity > squareMaximumVelocity)
{
Single actualVelocity = Calculator.Sqrt(squareVelocity);
#if UNSAFE
particle->Velocity.X = (particle->Velocity.X / actualVelocity) * this.MaximumVelocity;
particle->Velocity.Y = (particle->Velocity.Y / actualVelocity) * this.MaximumVelocity;
particle->Velocity.Z = (particle->Velocity.Z / actualVelocity) * this.MaximumVelocity;
#else
particle.Velocity.X = (particle.Velocity.X / actualVelocity) * this.MaximumVelocity;
particle.Velocity.Y = (particle.Velocity.Y / actualVelocity) * this.MaximumVelocity;
particle.Velocity.Z = (particle.Velocity.Z / actualVelocity) * this.MaximumVelocity;
#endif
}
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
/// <summary>
/// Performs rendering of particles.
/// </summary>
/// <param name="iterator">The particle iterator object.</param>
/// <param name="context">The render context containing rendering information.</param>
protected override void Render(ref RenderContext context, ref ParticleIterator iterator)
{
Int32 vertexCount = 0;
Vector3 cameraPos = context.CameraPosition;
Vector3 rotationAxis = context.BillboardRotationalAxis;
bool squareTexture = (context.Texture.Height == context.Texture.Width);
float aspectRatio = context.Texture.Height / (float)context.Texture.Width ;
SetDataOptions setDataOptions = SetDataOptions.NoOverwrite;
//Use the SpriteBatch style of filling buffers
//http://blogs.msdn.com/b/shawnhar/archive/2010/07/07/setdataoptions-nooverwrite-versus-discard.aspx
if (_vertexBufferPosition + context.Count * VerticesPerParticle > NumVertices)
{
//Too much to fit in the remaining space - start at the beginning and discard
_vertexBufferPosition = 0;
setDataOptions = SetDataOptions.Discard;
}
#if UNSAFE
unsafe
{
fixed (ParticleVertex* vertexArray = Vertices)
{
ParticleVertex* verts = vertexArray +_vertexBufferPosition;
#else
int vertexIndex = _vertexBufferPosition;
#endif
var particle = iterator.First;
do
{
#if UNSAFE
Single scale = particle->Scale;
Vector3 position = particle->Position;
Vector3 rotation = particle->Rotation;
Vector4 colour = particle->Colour;
//Work out our world transform - and set a flag to avoid some multiplies if world ends up as zero
bool worldIsNotIdentity = true;
Matrix effectWorld;
if (context.WorldIsIdentity)
{
if (particle->EffectProxyIndex > 0)
{
effectWorld = ParticleEffectProxy.Proxies[particle->EffectProxyIndex].World;
}
else
{
worldIsNotIdentity = false;
effectWorld = Matrix.Identity; //Makes the compiler happy though we will never actually use it.
}
}
else
{
effectWorld = particle->EffectProxyIndex > 0 ? ParticleEffectProxy.Proxies[particle->EffectProxyIndex].FinalWorld : context.World;
}
#else
Single scale = particle.Scale;
Vector3 position = particle.Position;
Vector3 rotation = particle.Rotation;
Vector4 colour = particle.Colour;
//If we have a proxy then multiply in the proxy world matrix
bool worldIsNotIdentity = true;
Matrix effectWorld;
if (context.WorldIsIdentity)
{
if (particle.EffectProxyIndex > 0)
{
effectWorld = ParticleEffectProxy.Proxies[particle.EffectProxyIndex].World;
}
else
{
worldIsNotIdentity = false;
effectWorld = Matrix.Identity;
//Makes the compiler happy though we will never actually use it.
}
}
else
{
effectWorld = particle.EffectProxyIndex > 0
? ParticleEffectProxy.Proxies[particle.EffectProxyIndex].FinalWorld
: context.World;
}
#endif
//Individual particle transformations - scale and rotation
//The Rotation setup will fill in the top 3x3 so we just need to initialise 44
var transform = new Matrix {M44 = 1};
float scaleX = scale;
float scaleY = squareTexture ? scale : scale * aspectRatio;
//ScaleZ is always 1 so no need multiple into M_3
//Inline the rotation and scale calculations and do each element in one go
//Fast rotation matrix - see http://en.wikipedia.org/wiki/Rotation_matrix#General_rotations
//This set matches
//Matrix temp2 = Matrix.CreateRotationX(rotation.X) * Matrix.CreateRotationY(rotation.Y) * Matrix.CreateRotationZ(rotation.Z); //Matches math od Rotx*RotY*RotZ
//var cosX = (float) Math.Cos(rotation.X);
//var cosY = (float) Math.Cos(rotation.Y);
//var cosZ = (float) Math.Cos(rotation.Z);
//var sinX = (float) Math.Sin(rotation.X);
//var sinY = (float) Math.Sin(rotation.Y);
//var sinZ = (float) Math.Sin(rotation.Z);
//transform.M11 = cosY*cosZ;
//transform.M12 = cosY * sinZ;
//transform.M13 = -sinY;
//transform.M21 = sinX*sinY*cosZ - cosX * sinZ;
//transform.M22 = sinX*sinY*sinZ + cosX*cosZ;
//transform.M23 = sinX*cosY;
//transform.M31 = cosX*sinY*cosZ + sinX * sinZ;
//transform.M32 = cosX*sinY*sinZ - sinX * cosZ;
//transform.M33 = cosX * cosY;
//This set matches
//Matrix temp2 = Matrix.CreateScale(new VEctor3(scaleX, scaleY,1) * Matrix.CreateRotationZ(rotation.Z) * Matrix.CreateRotationX(rotation.Y) * Matrix.CreateRotationY(rotation.X) ; //Matches YawPitchRoll order
//Matrix temp = Matrix.CreateScale(new VEctor3(scaleX, scaleY,1) * Matrix.CreateFromYawPitchRoll(rotation.X, rotation.Y, rotation.Z);
//TODO - can we optimise out a rotation e.g.fast path if rotation.Y=0 etc
//TODO - can we optimise out rotation(s) if we know its a billboard? That overwrites much of the transform
var cosX = (float)Math.Cos(rotation.Y);
var cosY = (float)Math.Cos(rotation.X);
var cosZ = (float)Math.Cos(rotation.Z);
var sinX = (float)Math.Sin(rotation.Y);
var sinY = (float)Math.Sin(rotation.X);
var sinZ = (float)Math.Sin(rotation.Z);
var cosYcosZ = cosY*cosZ;
var cosYsinZ = cosY*sinZ;
var sinXsinY = sinX*sinY;
transform.M11 = (cosYcosZ + sinXsinY * sinZ) * scaleX;
transform.M12 = (cosX * sinZ) * scaleX;
transform.M13 = (sinX * cosYsinZ - sinY * cosZ) * scaleX;
transform.M21 = (sinXsinY * cosZ - cosYsinZ) * scaleY;
transform.M22 = (cosX * cosZ) *scaleY;
transform.M23 = (sinY * sinZ + sinX * cosYcosZ) * scaleY;
transform.M31 = cosX * sinY;
transform.M32 = -sinX;
transform.M33 = cosX * cosY;
switch (context.BillboardStyle)
{
case BillboardStyle.None:
//Position the particle without a multiplication!
transform.M41 = position.X;
transform.M42 = position.Y;
transform.M43 = position.Z;
//Just apply the world
//TODO - we can just do this in Basic effect instead of per vertex - only if there is no proxy, sort of a fast path!
if (worldIsNotIdentity)
{
Matrix.Multiply(ref transform, ref effectWorld, out transform);
}
break;
default: //Its billboarded
Vector3 worldPos;
if (worldIsNotIdentity)
{
Vector3.Transform(ref position, ref effectWorld, out worldPos);
}
else
{
worldPos = position;
}
//Apply the billboard (which includes the world translation)
Matrix billboardMatrix;
if (context.BillboardStyle == BillboardStyle.Spherical)
{
//Spherical billboards (always face the camera)
Matrix.CreateBillboard(ref worldPos, ref cameraPos, ref Up, Forward,
out billboardMatrix);
}
else
{
//HACK: For progenitor DBP use the velocity as the axis for a per particle axis
if (context.UseVelocityAsBillboardAxis)
{
#if UNSAFE
Matrix.CreateConstrainedBillboard(ref worldPos, ref cameraPos, ref particle->Velocity,
Forward, null, out billboardMatrix);
#else
Matrix.CreateConstrainedBillboard(ref worldPos, ref cameraPos, ref particle.Velocity,
Forward, null, out billboardMatrix);
#endif
}
else
{
//Cylindrical billboards have a vector they are allowed to rotate around
Matrix.CreateConstrainedBillboard(ref worldPos, ref cameraPos, ref rotationAxis,
Forward, null, out billboardMatrix);
}
}
Matrix.Multiply(ref transform, ref billboardMatrix, out transform);
break;
}
Vector3 v1;
Vector3 v2;
Vector3 v3;
Vector3 v4;
Vector3.Transform(ref inv1, ref transform, out v1);
Vector3.Transform(ref inv2, ref transform, out v2);
Vector3.Transform(ref inv3, ref transform, out v3);
Vector3.Transform(ref inv4, ref transform, out v4);
#if UNSAFE
//inline particle value assignments - removes 4 calls with their parameters and its a struct anyway
verts->Position.X = v1.X;
verts->Position.Y = v1.Y;
verts->Position.Z = v1.Z;
verts->Colour.X = colour.X;
verts->Colour.Y = colour.Y;
verts->Colour.Z = colour.Z;
verts->Colour.W = colour.W;
verts++;
verts->Position.X = v2.X;
verts->Position.Y = v2.Y;
verts->Position.Z = v2.Z;
verts->Colour.X = colour.X;
verts->Colour.Y = colour.Y;
verts->Colour.Z = colour.Z;
verts->Colour.W = colour.W;
verts++;
verts->Position.X = v3.X;
verts->Position.Y = v3.Y;
verts->Position.Z = v3.Z;
verts->Colour.X = colour.X;
verts->Colour.Y = colour.Y;
verts->Colour.Z = colour.Z;
verts->Colour.W = colour.W;
verts++;
verts->Position.X = v4.X;
verts->Position.Y = v4.Y;
verts->Position.Z = v4.Z;
verts->Colour.X = colour.X;
verts->Colour.Y = colour.Y;
verts->Colour.Z = colour.Z;
verts->Colour.W = colour.W;
verts++;
#else
//inline particle value assignments - removes 4 calls with their parameters and its a struct anyway
this.Vertices[vertexIndex].Position = v1;
this.Vertices[vertexIndex].Colour = colour;
this.Vertices[vertexIndex++].TextureCoordinate = uv1;
this.Vertices[vertexIndex].Position = v2;
this.Vertices[vertexIndex].Colour = colour;
this.Vertices[vertexIndex++].TextureCoordinate = uv2;
this.Vertices[vertexIndex].Position = v3;
this.Vertices[vertexIndex].Colour = colour;
this.Vertices[vertexIndex++].TextureCoordinate = uv3;
this.Vertices[vertexIndex].Position = v4;
this.Vertices[vertexIndex].Colour = colour;
this.Vertices[vertexIndex++].TextureCoordinate = uv4;
#endif
vertexCount += 4;
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
base.GraphicsDeviceService.GraphicsDevice.BlendState = context.BlendState;
this.BasicEffect.Texture = context.Texture;
//Xbox need the vertex buffer to be set to null before SetData is called
//Windows does not
//TODO: Is this a bug? see http://forums.create.msdn.com/forums/p/61885/399495.aspx#399495
#if XBOX
if (setDataOptions == SetDataOptions.Discard)
{
base.GraphicsDeviceService.GraphicsDevice.SetVertexBuffer(null);
}
#endif
_vertexBuffer.SetData(_vertexBufferPosition * ParticleVertex.Size, Vertices, _vertexBufferPosition, vertexCount, ParticleVertex.Size, setDataOptions);
Debug.WriteLine(String.Format("position: {0} Count: {1} Hint: {2}", _vertexBufferPosition, vertexCount, setDataOptions));
base.GraphicsDeviceService.GraphicsDevice.SetVertexBuffer(_vertexBuffer);
foreach (EffectPass pass in this.BasicEffect.CurrentTechnique.Passes)
{
pass.Apply();
base.GraphicsDeviceService.GraphicsDevice.DrawIndexedPrimitives(PrimitiveType.TriangleList, 0, _vertexBufferPosition, vertexCount,
_vertexBufferPosition/4*6, vertexCount/2);
}
//Move to the next free part of the array
_vertexBufferPosition += vertexCount;
#if UNSAFE
}
}
#endif
}
/// <summary>
/// Renders the specified particle effect.
/// </summary>
/// <param name="effect">The particle effect to render.</param>
/// <param name="worldMatrix">The world transformation matrix.</param>
/// <param name="viewMatrix">The view matrix.</param>
/// <param name="projectionMatrix">The projection matrix.</param>
/// <param name="cameraPosition">The camera matrix.</param>
public void RenderEffect(ParticleEffect effect, ref Matrix worldMatrix,
ref Matrix viewMatrix,
ref Matrix projectionMatrix,
ref Vector3 cameraPosition)
{
#if UNSAFE
unsafe
#endif
{
this.PreRender(ref worldMatrix, ref viewMatrix, ref projectionMatrix);
//Pre-multiply any proxies world matrices with the passed in world matrix
if (effect.Proxies != null && worldMatrix != Matrix.Identity)
{
effect.SetFinalWorld(ref worldMatrix);
}
for (Int32 i = 0; i < effect.Emitters.Count; i++)
{
AbstractEmitter emitter = effect.Emitters[i];
// Skip if the emitter does not have a texture...
if (emitter.ParticleTexture == null)
continue;
// Skip if the emitter blend mode is set to 'None'...
if (emitter.BlendMode == EmitterBlendMode.None)
continue;
// Skip if the emitter has no active particles...
if (emitter.ActiveParticlesCount == 0)
continue;
BlendState blendState = BlendStateFactory.GetBlendState(emitter.BlendMode);
RenderContext context = new RenderContext(emitter.BillboardStyle, emitter.BillboardRotationalAxis, blendState, emitter.ParticleTexture, ref worldMatrix, ref viewMatrix, ref projectionMatrix, ref cameraPosition, emitter.ActiveParticlesCount, emitter.UseVelocityAsBillboardAxis);
Counters.ParticlesDrawn += emitter.ActiveParticlesCount;
#if UNSAFE
fixed (Particle* buffer = emitter.Particles)
#else
Particle[] buffer = emitter.Particles;
#endif
{
ParticleIterator iterator = new ParticleIterator(buffer, emitter.Budget, emitter.ActiveIndex, emitter.ActiveParticlesCount);
this.Render(ref context, ref iterator);
}
}
}
}
/// <summary> /// Performs rendering of particles. /// </summary> /// <param name="context">The render context containing rendering information.</param> /// <param name="iterator">The particle iterator object.</param> protected abstract void Render(ref RenderContext context, ref ParticleIterator iterator);
/// <summary>
/// Processes active particles.
/// </summary>
/// <param name="deltaSeconds">Elapsed time in whole and fractional seconds.</param>
/// <param name="iterator">A particle iterator object.</param>
#if UNSAFE
protected internal override unsafe void Process(Single deltaSeconds, ref ParticleIterator iterator)
/// <summary>
/// Updates the particle emitter.
/// </summary>
/// <param name="deltaSeconds">Elapsed time in whole and fractional seconds.</param>
public void Update(Single deltaSeconds)
{
Check.True(this.Initialised, "Emitter has not yet been initialised!");
this.TotalSeconds += deltaSeconds;
this.Controllers.Update(deltaSeconds);
if (this.ActiveParticlesCount < 1)
{
return;
}
#if UNSAFE
unsafe
#endif
{
#if UNSAFE
fixed(Particle *particleArray = this.Particles)
#endif
{
// Copy the state of the ring buffer as we will modify it as particles die...
var currentIndex = this.ActiveIndex;
var currentParticleCount = this.ActiveParticlesCount;
for (var i = 0; i < currentParticleCount; i++)
{
#if UNSAFE
// Get a pointer to the particle in the buffer...
Particle *particle = particleArray + currentIndex;
// Calculate the age of the particle in seconds...
var actualAge = this.TotalSeconds - particle->Inception;
#else
// Extract the particle from the buffer...
Particle particle = this.Particles[currentIndex];
// Calculate the age of the particle in seconds...
var actualAge = this.TotalSeconds - particle.Inception;
#endif
// Check to see if the particle has expired...
if (actualAge > this.Term)
{
// Increment the index of the first active particle...
this.ActiveIndex = (this.ActiveIndex + 1) % this.Budget;
// Decrement the active particles count...
this.ActiveParticlesCount = (this.ActiveParticlesCount - 1);
}
else
{
#if UNSAFE
// Calculate the normalized age of the particle...
particle->Age = actualAge / this.Term;
//HACK: For progenitor DBP use the velocity as the axis for a per particle axis
if (!UseVelocityAsBillboardAxis)
{
// Apply particle movement...
particle->Position.X += (particle->Velocity.X * deltaSeconds);
particle->Position.Y += (particle->Velocity.Y * deltaSeconds);
particle->Position.Z += (particle->Velocity.Z * deltaSeconds);
}
else
{
particle->Velocity.Normalize();
}
#else
// Calculate the normalized age of the particle...
particle.Age = actualAge / this.Term;
// Apply particle movement...
particle.Position.X += (particle.Velocity.X * deltaSeconds);
particle.Position.Y += (particle.Velocity.Y * deltaSeconds);
particle.Position.Z += (particle.Velocity.Z * deltaSeconds);
// Put the mutated particle back in the buffer...
this.Particles[currentIndex] = particle;
#endif
}
currentIndex = (currentIndex + 1) % this.Budget;
}
if (this.ActiveParticlesCount > 0)
{
#if UNSAFE
var buffer = particleArray;
#else
var buffer = this.Particles;
#endif
var iterator = new ParticleIterator(buffer, this.Budget, this.ActiveIndex, this.ActiveParticlesCount);
this.Modifiers.RunProcessors(deltaSeconds, ref iterator);
}
}
}
}
/// <summary> /// Performs rendering of particles. /// </summary> /// <param name="context">The render context containing rendering information.</param> /// <param name="iterator">The particle iterator object.</param> protected abstract void Render(ref RenderContext context, ref ParticleIterator iterator);
protected internal override void Process(Single deltaSeconds, ref ParticleIterator iterator)
#endif
{
Single deltaStrength = this.Strength * deltaSeconds;
Single deltaForceX = this.Force.X * deltaStrength;
Single deltaForceY = this.Force.Y * deltaStrength;
Single deltaForceZ = this.Force.Z * deltaStrength;
var particle = iterator.First;
do
{
#if UNSAFE
Vector3 position = particle->Position;
#else
Vector3 position = particle.Position;
#endif
if (position.X > (this.Position.X - this.HalfWidth))
if (position.X < (this.Position.X + this.HalfWidth))
if (position.Y > (this.Position.Y - this.HalfHeight))
if (position.Y < (this.Position.Y + this.HalfHeight))
if (position.Z > (this.Position.Z - this.HalfDepth))
if (position.Z < (this.Position.Z + this.HalfDepth))
{
#if UNSAFE
particle->Velocity.X += deltaForceX;
particle->Velocity.Y += deltaForceY;
particle->Velocity.Z += deltaForceZ;
#else
particle.Velocity.X += deltaForceX;
particle.Velocity.Y += deltaForceY;
particle.Velocity.Z += deltaForceZ;
#endif
}
}
#if UNSAFE
while (iterator.MoveNext(&particle));
#else
while (iterator.MoveNext(ref particle));
#endif
}
/// <summary>
/// Processes active particles.
/// </summary>
/// <param name="deltaSeconds">Elapsed time in whole and fractional seconds.</param>
/// <param name="iterator">A particle iterator object.</param>
#if UNSAFE
protected internal override unsafe void Process(Single deltaSeconds, ref ParticleIterator iterator)
internal static global::System.Runtime.InteropServices.HandleRef getCPtr(ParticleIterator obj)
{
return((obj == null) ? new global::System.Runtime.InteropServices.HandleRef(null, global::System.IntPtr.Zero) : obj.swigCPtr);
}
protected internal abstract void Process(Single deltaSeconds, ref ParticleIterator iterator);
public BaseObject Create()
{
ParticleIterator emptyInstance = new ParticleIterator(CreatedWhenConstruct.CWC_NotToCreate);
return(emptyInstance);
}