protected override void SetParticle(int idx, NodeReference reference, ParticleEffectInstance instance, ref Matrix4 transform, float sparam, float globaltime)
{
float w = Width.GetValue(sparam, 0) / 2;
float h = Height.GetValue(sparam, 0) / 2;
float d = Depth.GetValue(sparam, 0) / 2;
float s_min = MathHelper.DegreesToRadians(MinSpread.GetValue(sparam, 0));
float s_max = MathHelper.DegreesToRadians(MaxSpread.GetValue(sparam, 0));
var pos = new Vector3(
FxRandom.NextFloat(-w, w),
FxRandom.NextFloat(-h, h),
FxRandom.NextFloat(-d, d)
);
var n = RandomInCone(s_min, s_max);
//var tr = Transform.GetMatrix(sparam, globaltime);
//var tr = Matrix4.Identity;
//n = (tr * new Vector4(n.Normalized(), 0)).Xyz.Normalized();
Vector3 translate;
Quaternion rotate;
if (DoTransform(reference, sparam, globaltime, out translate, out rotate))
{
pos += translate;
n = rotate * n;
}
var pr = pos;
instance.Pool.Particles[idx].Position = pr;
instance.Pool.Particles [idx].Normal = n * Pressure.GetValue(sparam, 0);
}
protected override void SetParticle(int idx, NodeReference reference, ParticleEffectInstance instance, ref Matrix4x4 transform, float sparam, float globaltime)
{
var r_min = MinRadius.GetValue(sparam, 0);
var r_max = MaxRadius.GetValue(sparam, 0);
var radius = FxRandom.NextFloat(r_min, r_max);
var p = new Vector3(
FxRandom.NextFloat(-1, 1),
FxRandom.NextFloat(-1, 1),
FxRandom.NextFloat(-1, 1)
);
p.Normalize();
var n = p;
Vector3 translate;
Quaternion rotate;
if (DoTransform(reference, sparam, globaltime, out translate, out rotate))
{
p += translate;
n = Vector3.Transform(n, rotate);
}
n *= Pressure.GetValue(sparam, 0);
var pr = p * radius;
instance.Pool.Particles[idx].Position = pr;
instance.Pool.Particles[idx].Normal = n;
}
protected virtual float GetSpread(float sparam, float time)
{
var s_min = MathHelper.DegreesToRadians(MinSpread.GetValue(sparam, 0));
var s_max = MathHelper.DegreesToRadians(MaxSpread.GetValue(sparam, 0));
return(FxRandom.NextFloat(s_min, s_max));
}
static Vector3 RandomCube(float minspread, float maxspread)
{
//(sqrt(1 - z^2) * cosϕ, sqrt(1 - z^2) * sinϕ, z)
var halfspread = maxspread / 2;
float z = FxRandom.NextFloat((float)Math.Cos(halfspread), 1 - (minspread / 2));
float t = FxRandom.NextFloat(0, (float)(Math.PI * 2));
return(new Vector3(
(float)(Math.Sqrt(1 - z * z) * Math.Cos(t)),
(float)(Math.Sqrt(1 - z * z) * Math.Sin(t)),
z
));
}
//Different direction to FxCubeEmitter
static Vector3 RandomInCone(float minspread, float maxspread)
{
var direction = Vector3.UnitY;
var axis = Vector3.UnitX;
var angle = FxRandom.NextFloat(minspread, maxspread);
var rotation = Quaternion.CreateFromAxisAngle(axis, angle);
Vector3 output = Vector3.Transform(direction, rotation);
var random = FxRandom.NextFloat(-MathHelper.Pi, MathHelper.Pi);
rotation = Quaternion.CreateFromAxisAngle(direction, random);
output = Vector3.Transform(output, rotation);
return(output);
}
//Different direction to FxCubeEmitter
static Vector3 RandomInCone(float minspread, float maxspread)
{
return(Vector3.UnitY);
var direction = Vector3.UnitY;
var axis = Vector3.UnitZ;
var angle = FxRandom.NextFloat(minspread, maxspread);
var rotation = Quaternion.FromAxisAngle(axis, angle);
Vector3 output = rotation * direction;
var random = FxRandom.NextFloat(-MathHelper.Pi, MathHelper.Pi);
rotation = Quaternion.FromAxisAngle(direction, random);
output = rotation * output;
return(output);
}
protected override void SetParticle(int idx, NodeReference reference, ParticleEffectInstance instance, ref Matrix4x4 transform, float sparam, float globaltime)
{
var r_min = MinRadius.GetValue(sparam, 0);
var r_max = MaxRadius.GetValue(sparam, 0);
var radius = FxRandom.NextFloat(r_min, r_max);
float s_min = MathHelper.DegreesToRadians(MinSpread.GetValue(sparam, 0));
float s_max = MathHelper.DegreesToRadians(MaxSpread.GetValue(sparam, 0));
var n = RandomInCone(s_min, s_max);
Vector3 translate;
Quaternion rotate;
if (DoTransform(reference, sparam, globaltime, out translate, out rotate))
{
n = Vector3.Transform(n, rotate);
}
var p = n * radius + translate;
n *= Pressure.GetValue(sparam, 0);
instance.Pool.Particles[idx].Position = p;
instance.Pool.Particles[idx].Normal = n;
}