using System;
using System.Collections.Generic;
using Assistance.Drawing;
namespace Assistance {
public class Track {
public interface IOwner { }
public class Handler {
public readonly IOwner owner;
public readonly Track original;
public readonly List<Track> tracks = new List<Track>();
public Handler(IOwner owner, Track original) {
this.owner = owner;
this.original = original;
}
}
public class Modifier {
public readonly Handler handler;
public readonly double timeOffset;
public Modifier(Handler handler, double timeOffset = 0.0)
{ this.handler = handler; this.timeOffset = timeOffset; }
public IOwner owner
{ get { return handler.owner; } }
public Track original
{ get { return handler.original; } }
public virtual WayPoint calcWayPoint(double originalIndex)
{ return original.calcWayPoint(originalIndex); }
}
public struct Point {
public Assistance.Point position;
public double pressure;
public Assistance.Point tilt;
public Point(
Assistance.Point position,
double pressure,
Assistance.Point tilt
) {
this.position = position;
this.pressure = pressure;
this.tilt = tilt;
}
public static Point operator+ (Point a, Point b)
{ return new Point(a.position + b.position, a.pressure + b.pressure, a.tilt + b.tilt); }
public static Point operator- (Point a, Point b)
{ return new Point(a.position - b.position, a.pressure - b.pressure, a.tilt - b.tilt); }
public static Point operator* (Point a, double b)
{ return new Point(a.position*b, a.pressure*b, a.tilt*b); }
public static Point operator* (double a, Point b)
{ return a*b; }
public static Point operator/ (Point a, double b)
{ return a*(1.0/b); }
public bool isEqual(Point other) {
return position.isEqual(other.position)
&& Geometry.isEqual(pressure, other.pressure)
&& tilt.isEqual(other.tilt);
}
public Point normalize() {
double l = position.len();
return l > Geometry.precision ? this/l : this;
}
}
public struct WayPoint {
public Point point;
public Point tangent;
public double originalIndex;
public double time;
public double length;
public int depRootIndex;
public bool final;
public WayPoint(
Point point,
Point tangent = new Point(),
double originalIndex = 0.0,
double time = 0.0,
double length = 0.0,
int depRootIndex = 0,
bool final = false
) {
this.point = point;
this.tangent = tangent;
this.originalIndex = originalIndex;
this.time = time;
this.length = length;
this.depRootIndex = depRootIndex;
this.final = final;
}
}
private static long lastId;
public readonly long id;
public readonly Gdk.Device device;
public readonly long touchId;
public readonly List<WayPoint> points = new List<WayPoint>();
public readonly KeyHistory<Gdk.Key>.Holder keyHistory;
public readonly KeyHistory<uint>.Holder buttonHistory;
public readonly Modifier modifier;
public Handler handler;
public int wayPointsRemoved;
public int wayPointsAdded;
public Track(
Gdk.Device device = null,
long touchId = 0,
KeyHistory<Gdk.Key>.Holder keyHistory = null,
KeyHistory<uint>.Holder buttonHistory = null
) {
this.id = ++lastId;
this.device = device;
this.touchId = touchId;
this.keyHistory = keyHistory;
this.buttonHistory = buttonHistory;
}
public Track(Modifier modifier):
this( modifier.original.device,
modifier.original.touchId,
modifier.original.keyHistory.offset( modifier.timeOffset ),
modifier.original.buttonHistory.offset( modifier.timeOffset ) )
{ this.modifier = modifier; }
public Track original
{ get { return modifier != null ? modifier.original : null; } }
public double timeOffset
{ get { return modifier != null ? modifier.timeOffset : 0.0; } }
public long ticks
{ get { return keyHistory.ticks; } }
public bool isChanged
{ get { return wayPointsAdded != 0 || wayPointsRemoved != 0; } }
public Track getRoot()
{ return original == null ? this : original.getRoot(); }
public int getLevel()
{ return original == null ? 0 : original.getLevel() + 1; }
public WayPoint getFirst()
{ return getWayPoint(0); }
public WayPoint getLast()
{ return getWayPoint(points.Count - 1); }
public bool isFinished()
{ return points.Count > 0 && getLast().final; }
public int clampIndex(int index)
{ return Math.Min(Math.Max(index, 0), points.Count - 1); }
public int floorIndex(double index, out double frac) {
int i = (int)Math.Floor(index + Geometry.precision);
if (i > points.Count - 1)
{ frac = 0.0; return points.Count - 1; }
if (i < 0)
{ frac = 0.0; return 0; }
frac = Math.Max(0.0, index - (double)i);
return i;
}
public int floorIndexNoClamp(double index)
{ return (int)Math.Floor(index + Geometry.precision); }
public int floorIndex(double index)
{ return clampIndex(floorIndexNoClamp(index)); }
public int ceilIndexNoClamp(double index)
{ return (int)Math.Ceiling(index - Geometry.precision); }
public int ceilIndex(double index)
{ return clampIndex(ceilIndexNoClamp(index)); }
public WayPoint getWayPoint(int index) {
index = clampIndex(index);
return index < 0 ? new WayPoint() : points[index];
}
public WayPoint floorWayPoint(double index, out double frac)
{ return getWayPoint(floorIndex(index, out frac)); }
public WayPoint floorWayPoint(double index)
{ return getWayPoint(floorIndex(index)); }
public WayPoint ceilWayPoint(double index)
{ return getWayPoint(ceilIndex(index)); }
private delegate double WayPointFieldGetter(WayPoint p);
private double binarySearch(double value, WayPointFieldGetter getter) {
// points[a].value <= value < points[b].value
if (points.Count <= 0) return 0.0;
int a = 0;
double aa = getter(points[a]);
if (Geometry.isLess(value, aa)) return 0.0;
int b = points.Count - 1;
double bb = getter(points[b]);
if (Geometry.isGreaterOrEqual(value, bb)) return (double)b;
while(true) {
int c = (a + b)/2;
if (a == c) break;
double cc = getter(points[c]);
if (Geometry.isLess(value, cc))
{ b = c; bb = cc; } else { a = c; aa = cc; }
}
return Geometry.isLess(aa, bb) ? (double)a + (value - aa)/(bb - aa) : (double)a;
}
public double indexByOriginalIndex(double originalIndex)
{ return binarySearch(originalIndex, delegate(WayPoint p) { return p.originalIndex; }); }
public double indexByTime(double time)
{ return binarySearch(time, delegate(WayPoint p) { return p.time; }); }
public double indexByLength(double length)
{ return binarySearch(length, delegate(WayPoint p) { return p.length; }); }
public double originalIndexByIndex(double index) {
double frac;
WayPoint p0 = floorWayPoint(index, out frac), p1 = ceilWayPoint(index);
return Geometry.interpolationLinear(p0.originalIndex, p1.originalIndex, frac);
}
public double timeByIndex(double index) {
double frac;
WayPoint p0 = floorWayPoint(index, out frac), p1 = ceilWayPoint(index);
return Geometry.interpolationLinear(p0.time, p1.time, frac);
}
public double lengthByIndex(double index) {
double frac;
WayPoint p0 = floorWayPoint(index, out frac), p1 = ceilWayPoint(index);
return Geometry.interpolationLinear(p0.length, p1.length, frac);
}
public WayPoint calcWayPoint(double index) {
return modifier == null
? interpolate(index)
: modifier.calcWayPoint( originalIndexByIndex(index) );
}
public WayPoint interpolate(double index) {
double frac;
WayPoint p0 = floorWayPoint(index, out frac);
WayPoint p1 = ceilWayPoint(index);
return interpolate(p0, p1, frac);
}
public static WayPoint interpolate(WayPoint p0, WayPoint p1, double l) {
if (l <= Geometry.precision) return p0;
if (l >= 1.0 - Geometry.precision) return p1;
return new WayPoint(
Geometry.interpolationSpline(p0.point, p1.point, p0.tangent, p1.tangent, l),
Geometry.interpolationSplineTangent(p0.point, p1.point, p0.tangent, p1.tangent, l),
Geometry.interpolationLinear(p0.originalIndex, p1.originalIndex, l),
Geometry.interpolationLinear(p0.time, p1.time, l),
Geometry.interpolationLinear(p0.length, p1.length, l),
p1.depRootIndex );
}
}
}