protected override void Start()
{
base.Start();
_particleEffect = ContentManager.GetEffect <ParticleEffect>();
_velocityType = VelocityTypeUtility.GetImplementation(Definition.VelocityType);
_volumeType = VolumeTypeUtility.GetImplementation(Definition.VolumeType);
var texturePath = Path.Combine("Art", "Textures", Definition.ParticleName);
_texture = ContentManager.Load <Texture>(texturePath, uploadBatch: null);
var blendState = GetBlendState(Definition.Shader);
_pipelineStateHandle = new EffectPipelineState(
RasterizerStateDescription.CullBackSolid,
DepthStencilStateDescription.DepthRead,
blendState)
.GetHandle();
_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 = DynamicBuffer <ParticleVertex> .CreateArray(
GraphicsDevice,
maxParticles * 4,
BufferUsageFlags.None);
_vertices = new ParticleVertex[_vertexBuffer.ElementCount];
_indexBuffer = CreateIndexBuffer(GraphicsDevice, maxParticles);
State = ParticleSystemState.Active;
}
public void Update(GraphicsDevice graphicsDevice)
{
NumInstances = 0;
foreach (var instancedRenderable in InstancedRenderables)
{
if (instancedRenderable.Visible)
{
NumInstances += 1;
}
}
if (NumInstances == 0)
{
return;
}
if (Mesh.Skinned)
{
var numElements = (int)(Mesh.NumBones * NumInstances);
if (SkinningBuffer == null || SkinningBuffer.ElementCount < numElements)
{
SkinningBuffer = DynamicBuffer <Matrix4x3> .CreateArray(graphicsDevice, numElements, BufferUsageFlags.None);
_skinningBones = new Matrix4x3[numElements];
}
var boneIndex = 0;
foreach (var instancedRenderable in InstancedRenderables)
{
if (instancedRenderable.Visible)
{
for (var i = 0; i < Mesh.NumBones; i++)
{
// Bone matrix should be relative to root bone transform.
var rootBoneMatrix = instancedRenderable.Bones[0].LocalToWorldMatrix;
var boneMatrix = instancedRenderable.Bones[i].LocalToWorldMatrix;
var boneMatrixRelativeToRoot = boneMatrix * Matrix4x4Utility.Invert(rootBoneMatrix);
boneMatrixRelativeToRoot.ToMatrix4x3(out _skinningBones[boneIndex++]);
}
}
}
SkinningBuffer.UpdateData(_skinningBones);
}
if (WorldBuffer == null || WorldBuffer.ElementCount < NumInstances)
{
WorldBuffer = DynamicBuffer <Matrix4x4> .CreateArray(
graphicsDevice,
(int)NumInstances,
BufferUsageFlags.None);
_worldTransforms = new Matrix4x4[NumInstances];
}
var worldTransformIndex = 0;
foreach (var instancedRenderable in InstancedRenderables)
{
if (instancedRenderable.Visible)
{
_worldTransforms[worldTransformIndex++] = instancedRenderable.Renderable.Transform.LocalToWorldMatrix;
}
}
WorldBuffer.UpdateData(_worldTransforms);
}