h1or4dme8/osu-lazer
1
0
Fork 0
mirror of https://github.com/ppy/osu.git synced 2025-03-24 07:27:29 +08:00
Code Issues Releases Wiki Activity

Remove borrowed framework code

Browse Source
This commit is contained in:
Dean Herbert 2022-10-31 15:42:17 +09:00
parent 31ba77e378
commit 94dd4045f1
1 changed files with 1 additions and 80 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
osu.Game/Rulesets/Objects/BezierConverter.cs
View File

@ -39,85 +39,6 @@ namespace osu.Game.Rulesets.Objects
new[] { new Vector2d(1, 0), new Vector2d(1, 1.2447058f), new Vector2d(-0.8526471f, 2.118367f), new Vector2d(-2.6211002f, 7.854936e-06f), new Vector2d(-0.8526448f, -2.118357f), new Vector2d(1, -1.2447058f), new Vector2d(1, 0) })
};
#region CircularArcProperties
//TODO: Get this from osu!framework instead
public readonly struct CircularArcProperties
{
public readonly bool IsValid;
public readonly double ThetaStart;
public readonly double ThetaRange;
public readonly double Direction;
public readonly float Radius;
public readonly Vector2 Centre;
public double ThetaEnd => ThetaStart + ThetaRange * Direction;
public CircularArcProperties(double thetaStart, double thetaRange, double direction, float radius, Vector2 centre)
{
IsValid = true;
ThetaStart = thetaStart;
ThetaRange = thetaRange;
Direction = direction;
Radius = radius;
Centre = centre;
}
}
/// <summary>
/// Computes various properties that can be used to approximate the circular arc.
/// </summary>
/// <param name="controlPoints">Three distinct points on the arc.</param>
private static CircularArcProperties circularArcProperties(ReadOnlySpan<Vector2> controlPoints)
{
Vector2 a = controlPoints[0];
Vector2 b = controlPoints[1];
Vector2 c = controlPoints[2];
// If we have a degenerate triangle where a side-length is almost zero, then give up and fallback to a more numerically stable method.
if (Precision.AlmostEquals(0, (b.Y - a.Y) * (c.X - a.X) - (b.X - a.X) * (c.Y - a.Y)))
return default; // Implicitly sets `IsValid` to false
// See: https://en.wikipedia.org/wiki/Circumscribed_circle#Cartesian_coordinates_2
float d = 2 * (a.X * (b - c).Y + b.X * (c - a).Y + c.X * (a - b).Y);
float aSq = a.LengthSquared;
float bSq = b.LengthSquared;
float cSq = c.LengthSquared;
Vector2 centre = new Vector2(
aSq * (b - c).Y + bSq * (c - a).Y + cSq * (a - b).Y,
aSq * (c - b).X + bSq * (a - c).X + cSq * (b - a).X) / d;
Vector2 dA = a - centre;
Vector2 dC = c - centre;
float r = dA.Length;
double thetaStart = Math.Atan2(dA.Y, dA.X);
double thetaEnd = Math.Atan2(dC.Y, dC.X);
while (thetaEnd < thetaStart)
thetaEnd += 2 * Math.PI;
double dir = 1;
double thetaRange = thetaEnd - thetaStart;
// Decide in which direction to draw the circle, depending on which side of
// AC B lies.
Vector2 orthoAtoC = c - a;
orthoAtoC = new Vector2(orthoAtoC.Y, -orthoAtoC.X);
if (Vector2.Dot(orthoAtoC, b - a) < 0)
{
dir = -dir;
thetaRange = 2 * Math.PI - thetaRange;
}
return new CircularArcProperties(thetaStart, thetaRange, dir, r, centre);
}
#endregion
public static IEnumerable<Vector2> ConvertToLegacyBezier(IList<PathControlPoint> controlPoints, Vector2 position)
{
Vector2[] vertices = new Vector2[controlPoints.Count];
@ -248,7 +169,7 @@ namespace osu.Game.Rulesets.Objects
if (controlPoints.Length != 3)
return controlPoints.ToArray();
var pr = circularArcProperties(controlPoints);
var pr = new CircularArcProperties(controlPoints);
if (!pr.IsValid)
return controlPoints.ToArray();