public ParticleSystem(
ContentManager contentManager,
ParticleSystemDefinition definition,
GetMatrixReferenceDelegate getWorldMatrix)
{
Definition = definition;
_getWorldMatrix = getWorldMatrix;
var maxParticles = CalculateMaxParticles();
// If this system never emits any particles, there's no reason to fully initialise it.
if (maxParticles == 0)
{
return;
}
_graphicsDevice = contentManager.GraphicsDevice;
_particleMaterial = AddDisposable(new ParticleMaterial(contentManager, contentManager.EffectLibrary.Particle));
_velocityType = VelocityTypeUtility.GetImplementation(Definition.VelocityType);
_volumeType = VolumeTypeUtility.GetImplementation(Definition.VolumeType);
var texturePath = Path.Combine("Art", "Textures", Definition.ParticleName);
var texture = contentManager.Load <Texture>(texturePath);
_particleMaterial.SetTexture(texture);
var blendState = GetBlendState(Definition.Shader);
_particleMaterial.PipelineState = new EffectPipelineState(
RasterizerStateDescriptionUtility.DefaultFrontIsCounterClockwise,
DepthStencilStateDescription.DepthOnlyLessEqualRead,
blendState,
RenderPipeline.GameOutputDescription);
_initialDelay = Definition.InitialDelay.GetRandomInt();
_startSizeRate = Definition.StartSizeRate.GetRandomFloat();
_startSize = 0;
_colorKeyframes = new List <ParticleColorKeyframe>();
if (Definition.Color1 != null)
{
_colorKeyframes.Add(new ParticleColorKeyframe(Definition.Color1));
}
void addColorKeyframe(RgbColorKeyframe keyframe, RgbColorKeyframe previous)
{
if (keyframe != null && keyframe.Time > previous.Time)
{
_colorKeyframes.Add(new ParticleColorKeyframe(keyframe));
}
}
addColorKeyframe(Definition.Color2, Definition.Color1);
addColorKeyframe(Definition.Color3, Definition.Color2);
addColorKeyframe(Definition.Color4, Definition.Color3);
addColorKeyframe(Definition.Color5, Definition.Color4);
addColorKeyframe(Definition.Color6, Definition.Color5);
addColorKeyframe(Definition.Color7, Definition.Color6);
addColorKeyframe(Definition.Color8, Definition.Color7);
_particles = new Particle[maxParticles];
for (var i = 0; i < _particles.Length; i++)
{
_particles[i].AlphaKeyframes = new List <ParticleAlphaKeyframe>();
_particles[i].Dead = true;
}
_deadList = new List <int>();
_deadList.AddRange(Enumerable.Range(0, maxParticles));
var numVertices = maxParticles * 4;
_vertexBuffer = AddDisposable(contentManager.GraphicsDevice.ResourceFactory.CreateBuffer(
new BufferDescription(
(uint)(ParticleVertex.VertexDescriptor.Stride * maxParticles * 4),
BufferUsage.VertexBuffer | BufferUsage.Dynamic)));
_vertices = new ParticleVertex[numVertices];
_indexBuffer = AddDisposable(CreateIndexBuffer(
contentManager.GraphicsDevice,
maxParticles,
out _numIndices));
State = ParticleSystemState.Active;
}
protected override void Start()
{
base.Start();
_particleMaterial = new ParticleMaterial(ContentManager.EffectLibrary.Particle);
_velocityType = VelocityTypeUtility.GetImplementation(Definition.VelocityType);
_volumeType = VolumeTypeUtility.GetImplementation(Definition.VolumeType);
var texturePath = Path.Combine("Art", "Textures", Definition.ParticleName);
var texture = ContentManager.Load <Texture>(texturePath);
_particleMaterial.SetTexture(texture);
var blendState = GetBlendState(Definition.Shader);
_particleMaterial.PipelineState = new EffectPipelineState(
RasterizerStateDescription.CullBackSolid,
DepthStencilStateDescription.DepthRead,
blendState);
_initialDelay = Definition.InitialDelay.GetRandomInt();
_startSizeRate = Definition.StartSizeRate.GetRandomFloat();
_startSize = 0;
_colorKeyframes = new List <ParticleColorKeyframe>();
if (Definition.Color1 != null)
{
_colorKeyframes.Add(new ParticleColorKeyframe(Definition.Color1));
}
void addColorKeyframe(RgbColorKeyframe keyframe, RgbColorKeyframe previous)
{
if (keyframe != null && keyframe.Time > previous.Time)
{
_colorKeyframes.Add(new ParticleColorKeyframe(keyframe));
}
}
addColorKeyframe(Definition.Color2, Definition.Color1);
addColorKeyframe(Definition.Color3, Definition.Color2);
addColorKeyframe(Definition.Color4, Definition.Color3);
addColorKeyframe(Definition.Color5, Definition.Color4);
addColorKeyframe(Definition.Color6, Definition.Color5);
addColorKeyframe(Definition.Color7, Definition.Color6);
addColorKeyframe(Definition.Color8, Definition.Color7);
var maxParticles = CalculateMaxParticles();
_particles = new Particle[maxParticles];
for (var i = 0; i < _particles.Length; i++)
{
_particles[i].Dead = true;
}
_deadList = new List <int>();
_deadList.AddRange(Enumerable.Range(0, maxParticles));
_vertexBuffer = Buffer <ParticleVertex> .CreateDynamicArray(
GraphicsDevice,
maxParticles * 4,
BufferBindFlags.VertexBuffer);
_vertices = new ParticleVertex[_vertexBuffer.ElementCount];
_indexBuffer = CreateIndexBuffer(GraphicsDevice, maxParticles);
State = ParticleSystemState.Active;
}