public AnimatedTextureSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
_beeSwarm = BeeSwarm.Create(ContentManager);
_beeSwarm.Pose = new Pose(new Vector3F(0, 4, 0));
// Create 100 bees.
_beeSwarm.AddParticles(100);
ParticleSystemService.ParticleSystems.Add(_beeSwarm);
_particleSystemNode = new ParticleSystemNode(_beeSwarm);
GraphicsScreen.Scene.Children.Add(_particleSystemNode);
}
private ParticleSystem CreateParticleCloud(ContentManager content)
{
var ps = new ParticleSystem
{
Name = "Cloud",
MaxNumberOfParticles = 10,
Shape = new BoxShape(400, 300, 400), // This bounding shape must be big enough to include all particles!
ReferenceFrame = ParticleReferenceFrame.Local,
};
ps.Parameters.AddUniform<float>(ParticleParameterNames.Lifetime).DefaultValue = float.PositiveInfinity;
ps.Parameters.AddVarying<Vector3F>(ParticleParameterNames.Position);
ps.Effectors.Add(new StartPositionEffector
{
Parameter = ParticleParameterNames.Position,
Distribution = new SphereDistribution
{
Center = new Vector3F(0),
InnerRadius = 0,
OuterRadius = 1,
Scale = new Vector3F(100, 50, 100),
},
});
ps.Parameters.AddVarying<float>(ParticleParameterNames.Angle);
ps.Effectors.Add(new StartValueEffector<float>
{
Parameter = ParticleParameterNames.Angle,
Distribution = new UniformDistributionF(-0.5f, 0.5f),
});
ps.Parameters.AddVarying<float>(ParticleParameterNames.Size);
ps.Effectors.Add(new StartValueEffector<float>
{
Parameter = ParticleParameterNames.Size,
Distribution = new UniformDistributionF(100, 200),
});
ps.Parameters.AddUniform<Vector3F>(ParticleParameterNames.Color);
ps.Effectors.Add(new StartValueEffector<Vector3F>
{
Parameter = ParticleParameterNames.Color,
DefaultValue = new Vector3F(0.6f),
});
ps.Parameters.AddUniform<float>(ParticleParameterNames.Alpha).DefaultValue = 0.5f;
// DigitalRune Graphics supports "texture atlases": The class PackedTexture
// describes a single texture or tile set packed into a texture atlas. The
// clouds texture in this example consists of 2 tiles.
ps.Parameters.AddUniform<PackedTexture>(ParticleParameterNames.Texture).DefaultValue =
new PackedTexture(
"Clouds",
content.Load<Texture2D>("Particles/Clouds"),
Vector2F.Zero, Vector2F.One,
2, 1);
// The particle parameter "AnimationTime" determines which tile is used,
// where 0 = first tile, 1 = last tile.
// --> Chooses a random tile for each particle when it is created.
ps.Parameters.AddVarying<float>(ParticleParameterNames.AnimationTime);
ps.Effectors.Add(new StartValueEffector<float>
{
Parameter = ParticleParameterNames.AnimationTime,
Distribution = new UniformDistributionF(0, 1),
});
// It looks better with back-to-front sorting, but for better performance we skip sorting.
ps.Parameters.AddUniform<bool>(ParticleParameterNames.IsDepthSorted).DefaultValue = false;
ps.Parameters.AddUniform<BillboardOrientation>(ParticleParameterNames.BillboardOrientation).DefaultValue = BillboardOrientation.ViewpointOriented;
// Create some particles.
ps.AddParticles(ps.MaxNumberOfParticles);
return ps;
}