public static BaseComponent LoadFromDefinition(ContentManager content, string definitionPath, BaseEntity parent)
{
ParticleEmitterComponentDefinition compDef = content.Load <ParticleEmitterComponentDefinition>(definitionPath);
ParticleEmitterComponent newComponent = new ParticleEmitterComponent(parent, compDef);
return(newComponent);
}
/// <summary>
/// Constructor.
/// </summary>
public ParticleEmitterComponent(BaseEntity parent, ParticleEmitterComponentDefinition compDef)
: base(parent)
{
ActivateComponent();
this.settings = compDef;
if (settings.MaterialPath.Length > 0)
{
LoadMaterial(settings.MaterialPath);
}
else
{
throw new Exception("A ParticleEmitterComponentDefinition must contain either a valid material file path");
}
InitializeParticleSettings(this.settings);
}
/// <summary>
/// Initializes a particles settings
/// </summary>
/// <param name="settings">settings to initialize particle to</param>
public void InitializeParticleSettings(ParticleEmitterComponentDefinition settings)
{
FinalizeParticleSettings();
if (vertexDeclaration == null)
{
vertexDeclaration = ParticleVertex.VertexDeclaration;
}
this.particles = new ParticleVertex[this.settings.MaxParticles * 4];
for (int i = 0; i < this.settings.MaxParticles; i++)
{
this.particles[i * 4 + 0].Corner = new Short2(-1, -1);
this.particles[i * 4 + 1].Corner = new Short2(1, -1);
this.particles[i * 4 + 2].Corner = new Short2(1, 1);
this.particles[i * 4 + 3].Corner = new Short2(-1, 1);
}
this.vertexBuffer = new DynamicVertexBuffer(this.parentEntity.Game.GraphicsDevice, ParticleVertex.VertexDeclaration,
settings.MaxParticles * 4, BufferUsage.WriteOnly);
// Initialize the vertex buffer contents. This is necessary in order to correctly restore any existing particles after a lost device.
this.vertexBuffer.SetData(this.particles);
// Create and populate the index buffer.
ushort[] indices = new ushort[this.settings.MaxParticles * 6];
for (int i = 0; i < this.settings.MaxParticles; i++)
{
indices[i * 6 + 0] = (ushort)(i * 4 + 0);
indices[i * 6 + 1] = (ushort)(i * 4 + 1);
indices[i * 6 + 2] = (ushort)(i * 4 + 2);
indices[i * 6 + 3] = (ushort)(i * 4 + 0);
indices[i * 6 + 4] = (ushort)(i * 4 + 2);
indices[i * 6 + 5] = (ushort)(i * 4 + 3);
}
this.indexBuffer = new IndexBuffer(this.parentEntity.Game.GraphicsDevice, typeof(short),
indices.Length, BufferUsage.WriteOnly);
this.indexBuffer.SetData(indices);
}
