internal ParticleSystem(
FXParticleSystemTemplate template,
AssetLoadContext loadContext,
GetMatrixReferenceDelegate getWorldMatrix)
: this(template, loadContext)
{
_getWorldMatrix = getWorldMatrix;
}
public ParticleSystem Create(
FXParticleSystemTemplate template,
ParticleSystem.GetMatrixReferenceDelegate getWorldMatrix)
{
ParticleSystem result;
_particleSystems.Add(
AddDisposable(
result = new ParticleSystem(
template,
_loadContext,
getWorldMatrix)));
return(result);
}
internal ParticleSystem(
FXParticleSystemTemplate template,
AssetLoadContext loadContext,
in Matrix4x4 worldMatrix)
public ParticleSystem Create(
FXParticleSystemTemplate template,
in Matrix4x4 worldMatrix)
public ParticleSystem(
ContentManager contentManager,
FXParticleSystemTemplate template,
GetMatrixReferenceDelegate getWorldMatrix)
{
Template = template;
_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;
_renderItemConstantsBufferVS = AddDisposable(new ConstantBuffer <MeshShaderResources.RenderItemConstantsVS>(_graphicsDevice));
_velocityType = Template.EmissionVelocity;
_volumeType = Template.EmissionVolume;
var texturePath = Path.Combine("Art", "Textures", Template.ParticleName);
var texture = contentManager.Load <Texture>(texturePath);
_particleResourceSet = AddDisposable(contentManager.ShaderResources.Particle.CreateParticleResoureSet(
_renderItemConstantsBufferVS.Buffer,
texture));
_shaderSet = contentManager.ShaderResources.Particle.ShaderSet;
_pipeline = contentManager.ShaderResources.Particle.GetCachedPipeline(Template.Shader);
_initialDelay = Template.InitialDelay.GetRandomInt();
_startSizeRate = Template.StartSizeRate.GetRandomFloat();
_startSize = 0;
_colorKeyframes = new List <ParticleColorKeyframe>();
var colors = Template.Colors;
if (colors.Color1 != null)
{
_colorKeyframes.Add(new ParticleColorKeyframe(colors.Color1));
}
void addColorKeyframe(RgbColorKeyframe keyframe, RgbColorKeyframe previous)
{
if (keyframe != null && keyframe.Time > previous.Time)
{
_colorKeyframes.Add(new ParticleColorKeyframe(keyframe));
}
}
addColorKeyframe(colors.Color2, colors.Color1);
addColorKeyframe(colors.Color3, colors.Color2);
addColorKeyframe(colors.Color4, colors.Color3);
addColorKeyframe(colors.Color5, colors.Color4);
addColorKeyframe(colors.Color6, colors.Color5);
addColorKeyframe(colors.Color7, colors.Color6);
addColorKeyframe(colors.Color8, colors.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)(ParticleShaderResources.ParticleVertex.VertexDescriptor.Stride * maxParticles * 4),
BufferUsage.VertexBuffer | BufferUsage.Dynamic)));
_vertices = new ParticleShaderResources.ParticleVertex[numVertices];
_indexBuffer = AddDisposable(CreateIndexBuffer(
contentManager.GraphicsDevice,
maxParticles,
out _numIndices));
State = ParticleSystemState.Active;
_beforeRender = (cl, context) =>
{
// Only update once we know this particle system is visible on screen.
Update(cl, context.GameTime);
if (_worldMatrixChanged)
{
_renderItemConstantsBufferVS.Update(cl);
}
cl.SetGraphicsResourceSet(1, _particleResourceSet);
cl.SetVertexBuffer(0, _vertexBuffer);
};
}