void Section4_1()
{
// circle
int s = 62840;
int e = 63468;
float fade = 1;
layer = GetLayer("");
maskLayer = GetLayer("masks");
maskLayer2 = GetLayer("masks2");
var downwardsMovement = new Movement(OsbEasing.OutExpo, s, e, Vectors.Centre + Vectors.up(100), Vectors.Centre);
var ring1 = maskLayer2.CreateSprite(Sprites.Circle, OsbOrigin.Centre, downwardsMovement.StartPosition);
var ring1Mask = maskLayer2.CreateSprite(Sprites.Circle, OsbOrigin.Centre, downwardsMovement.StartPosition);
int circleWidth = GetMapsetBitmap(Sprites.Circle).Width;
float width = 350.0f;
float width2 = 250.0f;
float scale = width / circleWidth;
float thickness = 10;
float lineThickness = thickness * 0.71f;
float maskScale = (width - thickness * 2) / circleWidth / scale;
ring1.Fade(s, e, fade, fade);
ring1.Scale(OsbEasing.OutExpo, s, e - Timing.beat(s), scale, scale / width * width2);
ring1.Move(downwardsMovement);
ring1Mask.Fade(s, e, 1, 1);
ring1Mask.Color(s, Color4.Black); ring1Mask.Scale(OsbEasing.OutExpo, s, e - Timing.beat(s), scale * maskScale, scale * maskScale / width * width2);
ring1Mask.Move(downwardsMovement);
// 3d ring
float startOfRotation = e - 1.25f * (float)Timing.beat(s);
var inOutExpo = OsbEasing.InOutExpo.ToEasingFunction();
var outExpo = OsbEasing.OutExpo.ToEasingFunction();
Func <float, float, Vector3> moving3DCircle = (float t, float time) =>
{
float tilt = time < startOfRotation ? 0 : (float)inOutExpo((time - startOfRotation) / (e - startOfRotation));
Vector3 centre = downwardsMovement.PositionAtTime(time).withZ(0);
float radius = (MathHelper.Clamp(
InterpolatingFunctions.Float(width, width2, outExpo((time - s) / (e - Timing.beat(s) - s))),
width2, width
) - thickness) / 2;
Vector3 rot1 = new Vector3(
5 * (float)Math.PI / 16,
(float)Math.PI / 2,
0
);
Vector3 rot2 = new Vector3(
5 * (float)Math.PI / 16,
(float)Math.PI / 4,
0
);
Vector3 rot = Vector3.Lerp(rot1, rot2, tilt);
var res = radius * new Vector3(
(float)Math.Cos(-t),
(float)Math.Sin(-t),
0
).rotateX(rot.X).rotateY(rot.Y).rotateZ(rot.Z) + centre;
return(res);
};
int count = 200;
float dotScale = lineThickness / circleWidth;
for (int i = 0; i < count; i++)
{
var sprite = layer.CreateSprite(Sprites.Circle, OsbOrigin.Centre);
sprite.Fade(s, e, 1, 1);
for (float t = s; t < e; t += delta)
{
float t2 = t + delta < e ? t + delta : e;
Vector3 p1 = moving3DCircle(
i * 2 * (float)Math.PI / count,
t
);
Vector3 p2 = moving3DCircle(
i * 2 * (float)Math.PI / count,
t2
);
sprite.Move3D(
OsbEasing.None,
t, t2,
p1, p2,
FOV,
(_sprite, _p1, _p2) =>
{
float scale1 = dotScale / _p1.normalisedVector.Length;
float scale2 = dotScale / _p2.normalisedVector.Length;
if (scale1 != scale2)
{
_sprite.Scale(t, t2, scale1, scale2);
}
}
);
}
}
// dotted line through the sphere
count = 35;
float opacity = 1;
float lineAppearStart = s + (float)Timing.beat(s) / 3;
float appearDelay = (float)Timing.beat(s) / 2 / count;
float length = width2 + 2 * 70;
float dottedLineThickness = 1.2f;
SpriteSet axisDottedLine = maskLayer.CreateSpriteSet(
Sprites.Pixel,
_ => OsbOrigin.TopCentre,
Patterns.Line2D(Vectors.Centre + Vectors.up(length / 2), Vectors.Centre + Vectors.down(length / 2), count),
count
);
var dotMovement = new Movement(OsbEasing.OutQuint, s + Timing.beat(s) / 3, e, Vectors.Centre + Vectors.up(100), Vectors.Centre);
axisDottedLine.MoveRelative(dotMovement - Vectors.Centre);
axisDottedLine.ScaleVec((int)lineAppearStart, new Vector2(dottedLineThickness, length / count / 2));
axisDottedLine.Fade(
OsbEasing.None,
i => lineAppearStart + i * appearDelay,
i => lineAppearStart + i * appearDelay + 100,
0, opacity
);
axisDottedLine.Fade(e, 0);
SpriteSet gradientMask = maskLayer.CreateSpriteSet(Sprites.TransparentGradient, _ => OsbOrigin.CentreRight, 2);
gradientMask.Rotate(lineAppearStart, i => Math.PI / 2 + i * Math.PI);
float gradientWidth = GetMapsetBitmap(Sprites.TransparentGradient).Width;
gradientMask.ScaleVec(lineAppearStart, new Vector2(length / 2 / gradientWidth, dottedLineThickness));
gradientMask.AddSprites(
Sprites.Pixel,
i => (i % 2 == 0 ? OsbOrigin.BottomCentre : OsbOrigin.TopCentre),
i => Vectors.Centre + (i % 2 == 0 ? 1 : -1) * Vectors.up(length / 2),
2
);
float gradientExtension = Vectors.Centre.Y - length / 2;
gradientMask.ScaleVec(lineAppearStart, new Vector2(dottedLineThickness, gradientExtension), 2);
gradientMask.Color(lineAppearStart, Color4.Black);
gradientMask.Fade(lineAppearStart, e, 1.0, 1.0);
SpriteSet cover = maskLayer.CreateSpriteSet(Sprites.Pixel, 2);
cover.Move(i => downwardsMovement.ResampledSection(lineAppearStart, e, delta)
+ Vectors.up((width2 - lineThickness) / 2) * (i % 2 == 0 ? 1 : -1));
cover.Fade(lineAppearStart, e, 1.0, 1.0);
cover.ScaleVec(lineAppearStart, new Vector2(dottedLineThickness, lineThickness));
// point cloud
count = 50;
float pointScale = 0.2f;
var pattern = Patterns.PointCloudGlobe(Vectors.Centre.withZ(0), 500, new Random(RandomSeed));
var points = new List <Vector3>();
for (int i = 0; i < count; i++)
{
points.Add(pattern(i));
}
SpriteSet pointCloud = layer.CreateSpriteSet(
Sprites.Particle,
_ => OsbOrigin.Centre,
i => points[i].project(Vectors.ScreenSize, Vectors.Centre, FOV).screenSpaceVector,
count
);
pointCloud.Fade(startOfRotation, startOfRotation + Timing.beat(s) / 2, 0, 0.6);
pointCloud.Fade(e, 0);
pointCloud.Scale(startOfRotation, 5);
for (float t = startOfRotation; t < e; t += delta)
{
float t2 = t + delta < e ? t + delta : e;
float angle = (float)(-Math.PI / 4 * inOutExpo((t - startOfRotation) / (e - startOfRotation)));
float angle2 = (float)(-Math.PI / 4 * inOutExpo((t2 - startOfRotation) / (e - startOfRotation)));
pointCloud.Move3D(
OsbEasing.None,
t, t2,
i => points[i].rotateY(angle, Vectors.Centre3D),
i => points[i].rotateY(angle2, 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);
}
}
);
}
foreach (var sprite in pointCloud.Sprites)
{
SpriteSet trail = Effects.Trail(layer, sprite, startOfRotation, e, 1000.0 / 60, 0, 0, 150, true);
trail.UseScaleOf(sprite);
}
}