SpriteSet MakeOuterRing(int s, int e, Vector2 position, float patternRadius, float scale)
{
var bitmap = GetMapsetBitmap(Sprites.Triangle);
float triangleWidth = bitmap.Width;
var hexagon = Patterns.Circle2D(position, patternRadius, (float)-Math.PI / 3, 5 * (float)Math.PI / 6);
SpriteSet triangles = layer.CreateSpriteSet(Sprites.Triangle, _ => OsbOrigin.Centre, hexagon, 6);
triangles.Fade(s, e, 1.0, 1.0);
triangles.Rotate(i => - Math.PI / 3 + i * Math.PI / 3);
triangles.Scale(patternRadius / triangleWidth * scale);
return(triangles);
}
void Section4_2()
{
// triangle pattern
int s = 63468;
int e = 63939;
float patternRadius = 300;
float scale = 0.6f;
float relativeRingScale = 0.5f;
Vector2 patternPosition = Vectors.Centre + Vectors.polar(-Math.PI / 6, patternRadius);
SpriteSet outer = MakeOuterRing(s, e, patternPosition, patternRadius, scale);
SpriteSet inner = MakeInnerRing(s, e, patternPosition, patternRadius * relativeRingScale, scale);
SpriteSet extension = layer.CreateSpriteSet();
for (int i = 0; i < 6; i++)
{
var ring = Patterns.Circle2D(
patternPosition,
patternRadius * 3,
(float)-Math.PI / 3,
5 * (float)Math.PI / 6
);
extension += MakeOuterRing(s, e, ring(i), patternRadius, scale);
}
for (int i = 0; i < 6; i++)
{
var ring = Patterns.Circle2D(
patternPosition,
patternRadius * (float)Math.Sqrt(3),
(float)-Math.PI / 3,
4 * (float)Math.PI / 6
);
extension += MakeInnerRing(s, e, ring(i), patternRadius * relativeRingScale, scale);
}
SpriteSet trianglePattern = inner + outer + extension;
float zoomScale = 0.9f;
float cutScale = 0.9f;
//trianglePattern.MoveRelative(s, Vector2.Zero);
trianglePattern.Scale(OsbEasing.None, s, s + 3 * Timing.beat(s) / 2, cutScale, cutScale * zoomScale, Vectors.Centre);
//trianglePattern.MoveRelative(OsbEasing.None, s, s + 3 * Timing.beat(s) / 2, Vector2.Zero, Vectors.down(patternRadius));
}
SpriteSet MakeInnerRing(int s, int e, Vector2 position, float patternRadius, float scale)
{
var bitmap = GetMapsetBitmap(Sprites.Triangle);
var bitmap2 = GetMapsetBitmap(Sprites.Circle);
float triangleWidth = bitmap.Width;
float circleWidth = bitmap2.Width;
var hexagon2 = Patterns.Circle2D(position, patternRadius, (float)-Math.PI / 3, 5 * (float)Math.PI / 6);
SpriteSet circles = layer.CreateSpriteSet(Sprites.Circle, _ => OsbOrigin.Centre, hexagon2, 6);
circles.Fade(s, e, 1.0, 1.0);
circles.Scale(patternRadius / circleWidth * scale * 0.8f);
float dist = 0.36f;
Func <int, Vector2> hexagon3 = (int i) => Vector2.Lerp(hexagon2(i), hexagon2(i + 1), i < 6 ? dist : 1 - dist);
SpriteSet smallTriangles = layer.CreateSpriteSet(Sprites.Triangle, _ => OsbOrigin.Centre, hexagon3, 12);
smallTriangles.Fade(s, e, 1.0, 1.0);
smallTriangles.Scale(patternRadius / triangleWidth * scale * 0.3f);
smallTriangles.Rotate(i => hexagon3(i).rotationTo(hexagon3(i + 6)), 0, 6);
smallTriangles.Rotate(i => hexagon3(i).rotationTo(hexagon3(i - 6)), 6, 6);
return(circles + smallTriangles);
}