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 Point calcPoint(double originalIndex) {
Point p = original.calcPoint(originalIndex);
p.originalIndex = originalIndex;
return p;
}
}
public struct Point {
public Assistance.Point position;
public double pressure;
public Assistance.Point tilt;
public double originalIndex;
public double time;
public double length;
public bool final;
public Point(
Assistance.Point position,
double pressure = 0.5,
Assistance.Point tilt = new Assistance.Point(),
double originalIndex = 0.0,
double time = 0.0,
double length = 0.0,
bool final = false
) {
this.position = position;
this.pressure = pressure;
this.tilt = tilt;
this.originalIndex = originalIndex;
this.time = time;
this.length = length;
this.final = final;
}
}
private static long lastId;
public readonly long id;
public readonly Gdk.Device device;
public readonly long touchId;
public readonly List<Point> points = new List<Point>();
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 Point getFirst()
{ return getPoint(0); }
public Point getLast()
{ return getPoint(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 Point getPoint(int index) {
index = clampIndex(index);
return index < 0 ? new Point() : points[index];
}
public Point floorPoint(double index, out double frac)
{ return getPoint(floorIndex(index, out frac)); }
public Point floorPoint(double index)
{ return getPoint(floorIndex(index)); }
public Point ceilPoint(double index)
{ return getPoint(ceilIndex(index)); }
private delegate double PointFieldGetter(Point p);
private double binarySearch(double value, PointFieldGetter 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(Point p) { return p.originalIndex; }); }
public double indexByTime(double time)
{ return binarySearch(time, delegate(Point p) { return p.time; }); }
public double indexByLength(double length)
{ return binarySearch(length, delegate(Point p) { return p.length; }); }
public double originalIndexByIndex(double index) {
double frac;
Point p0 = floorPoint(index, out frac), p1 = ceilPoint(index);
return Geometry.interpolationLinear(p0.originalIndex, p1.originalIndex, frac);
}
public double timeByIndex(double index) {
double frac;
Point p0 = floorPoint(index, out frac), p1 = ceilPoint(index);
return Geometry.interpolationLinear(p0.time, p1.time, frac);
}
public double lengthByIndex(double index) {
double frac;
Point p0 = floorPoint(index, out frac), p1 = ceilPoint(index);
return Geometry.interpolationLinear(p0.length, p1.length, frac);
}
public Point calcPoint(double index) {
return modifier == null
? interpolateLinear(index)
: modifier.calcPoint( originalIndexByIndex(index) );
}
public Point interpolateLinear(double index) {
double frac;
Point p0 = floorPoint(index, out frac);
Point p1 = ceilPoint(index);
return interpolateLinear(p0, p1, frac);
}
public static Point interpolateLinear(Point p0, Point p1, double l) {
if (l <= Geometry.precision) return p0;
if (l >= 1.0 - Geometry.precision) return p1;
return new Point(
Geometry.interpolationLinear(p0.position, p1.position, l),
Geometry.interpolationLinear(p0.pressure, p1.pressure, l),
Geometry.interpolationLinear(p0.tilt, p1.tilt, l),
Geometry.interpolationLinear(p0.originalIndex, p1.originalIndex, l),
Geometry.interpolationLinear(p0.time, p1.time, l),
Geometry.interpolationLinear(p0.length, p1.length, l) );
}
public void print() {
foreach(Point wp in points)
Console.Write(
"{2:f1}, ",
wp.position.x,
wp.position.y,
wp.originalIndex );
Console.WriteLine();
}
}
}