private void Ring3D(int s, int e)
{
int count = 50;
float pointScale = 0.2f;
Vector3 initialRingRotation = new Vector3(
(float)Math.PI / 4,
(float)Math.PI / 3,
0
);
Vector3 ringRotationSpeed = new Vector3(
0.01f,
0.02f,
0.03f
);
Vector3 ringRotation = Vector3.Zero;
Func <float, int, Vector3> ringPattern = (float t, int i)
=> Patterns.Circle3D(Vectors.Centre3D, 200, initialRingRotation, 2 * (float)Math.PI / count, t)(i);
SpriteSet ring = layer.CreateSpriteSet(
Sprites.Particle,
_ => OsbOrigin.Centre,
i => ringPattern(0, i).project(FOV).screenSpaceVector,
count
);
ring.Fade(s, s + Timing.beat(s) / 2, 0, 1.0f);
ring.Fade(e, 0);
ring.Scale(s, 0.5);
float spinSpeed = 2;
for (float t = s; t < e; t += delta)
{
float t2 = t + delta < e ? t + delta : e;
float spin = spinSpeed * (t - s) / 1000.0f;
float spin2 = spinSpeed * (t2 - s) / 1000.0f;
ring.Move3D(
OsbEasing.None,
t, t2,
i => ringPattern(spin, i).rotate3D(ringRotation, Vectors.Centre3D),
i => ringPattern(spin2, i).rotate3D(ringRotation + ringRotationSpeed, Vectors.Centre3D),
FOV,
(_sprite, _p1, _p2) =>
{
float scale1 = pointScale / _p1.normalisedVector.Length;
float scale2 = pointScale / _p2.normalisedVector.Length;
if (scale1 != scale2)
{
_sprite.Scale(t, t2, scale1, scale2);
}
}
);
ringRotation += ringRotationSpeed;
}
}