static bool SameCoord(EdgeLine a, EdgeLine b)
{
//TODO: review this again
return((a.P == b.P ||
a.P == b.Q) &&
(a.Q == b.P ||
a.Q == b.Q));
}
public static void dbugGetScaledXY(this EdgeLine edge, out double px, out double py, out double qx, out double qy, float scale)
{
px = edge.PX * scale;
py = edge.PY * scale;
//
qx = edge.QX * scale;
qy = edge.QY * scale;
}
/// <summary>
/// which one is min,max
/// </summary>
/// <param name="min"></param>
/// <param name="max"></param>
static void GetMinMax(EdgeLine edge, out Vector2 min, out Vector2 max)
{
Vector2 a_pos = new Vector2((float)edge.PX, (float)edge.PY);
Vector2 b_pos = new Vector2((float)edge.QX, (float)edge.QY);
min = Vector2.Min(a_pos, b_pos);
max = Vector2.Max(a_pos, b_pos);
}
public GlyphBone(GlyphBoneJoint a, EdgeLine tipEdge)
{
JointA = a;
TipEdge = tipEdge;
Vector2 midPoint = tipEdge.GetMidPoint();
_len = Math.Sqrt(a.CalculateSqrDistance(midPoint));
EvaluateSlope();
}
internal void SetTipEdge_P(EdgeLine e)
{
#if DEBUG
if (_tipEdge_p != null)
{
throw new System.NotSupportedException();
}
#endif
e.IsTip = true;
this._tipEdge_p = e;
}
internal void SetControlEdge(EdgeLine controlEdge)
{
//check if edge is connect to p or q
#if DEBUG
if (!controlEdge.IsInside)
{
}
#endif
//----------------
if (_glyphPoint_P == controlEdge._glyphPoint_P)
{
#if DEBUG
if (_ctrlEdge_P != null && _ctrlEdge_P != controlEdge)
{
}
#endif
//map this p to p of the control edge
_ctrlEdge_P = controlEdge;
}
else if (_glyphPoint_P == controlEdge.Q)
{
#if DEBUG
if (_ctrlEdge_P != null && _ctrlEdge_P != controlEdge)
{
}
#endif
_ctrlEdge_P = controlEdge;
}
else if (_glyphPoint_Q == controlEdge._glyphPoint_P)
{
#if DEBUG
if (_ctrlEdge_Q != null && _ctrlEdge_Q != controlEdge)
{
}
#endif
_ctrlEdge_Q = controlEdge;
}
else if (_glyphPoint_Q == controlEdge.Q)
{
#if DEBUG
if (_ctrlEdge_Q != null && _ctrlEdge_Q != controlEdge)
{
}
#endif
_ctrlEdge_Q = controlEdge;
}
else
{
//?
}
}
static void FindPerpendicular(EdgeLine outsideEdge, EdgeLine inside)
{
System.Numerics.Vector2 m0 = inside.GetMidPoint();
System.Numerics.Vector2 cut_fromM0;
if (MyMath.FindPerpendicularCutPoint(outsideEdge, new System.Numerics.Vector2(m0.X, m0.Y), out cut_fromM0))
{
((OutsideEdgeLine)outsideEdge).SetControlEdge(inside);
}
else
{
}
outsideEdge._earlyInsideAnalysis = inside._earlyInsideAnalysis = true;
}
/// <summary>
/// find cut point and check if the cut point is on the edge
/// </summary>
/// <param name="edge"></param>
/// <param name="p2"></param>
/// <param name="cutResult"></param>
/// <returns></returns>
public static bool FindPerpendicularCutPoint(EdgeLine edge, Vector2 p2, out Vector2 cutResult)
{
cutResult = FindPerpendicularCutPoint(
new Vector2((float)edge.PX, (float)edge.PY),
new Vector2((float)edge.QX, (float)edge.QY),
p2);
//also check if result cutpoint is on current line segment or not
Vector2 min, max;
GetMinMax(edge, out min, out max);
return(cutResult.X >= min.X && cutResult.X <= max.X && cutResult.Y >= min.Y && cutResult.Y <= max.Y);
}
public void CalculateBounds(ref float minX, ref float minY, ref float maxX, ref float maxY)
{
for (int e = edges.Length - 1; e >= 0; --e)
{
EdgeLine edge = edges[e];
// x
MyMath.FindMinMax(ref minX, ref maxX, (float)edge.PX);
MyMath.FindMinMax(ref minX, ref maxX, (float)edge.QX);
// y
MyMath.FindMinMax(ref minY, ref maxY, (float)edge.PY);
MyMath.FindMinMax(ref minY, ref maxY, (float)edge.QY);
}
}
internal void SetTipEdge_Q(EdgeLine e)
{
#if DEBUG
if (_tipEdge_q != null)
{
throw new System.NotSupportedException();
}
if (_tipEdge_q != null && _tipEdge_q == _tipEdge_p)
{
throw new System.NotSupportedException();
}
#endif
e.IsTip = true;
_tipEdge_q = e;
}
static EdgeLine FindAnotherOutsideEdge(GlyphTriangle tri, EdgeLine knownOutsideEdge)
{
if (tri.e0.IsOutside && tri.e0 != knownOutsideEdge)
{
return(tri.e0);
}
if (tri.e1.IsOutside && tri.e1 != knownOutsideEdge)
{
return(tri.e1);
}
if (tri.e2.IsOutside && tri.e2 != knownOutsideEdge)
{
return(tri.e2);
}
return(null);
}
/// <summary>
/// find nb triangle that has the same edgeLine
/// </summary>
/// <param name="tri"></param>
/// <returns></returns>
static bool FindSameCoordEdgeLine(GlyphTriangle tri, EdgeLine edgeLine, out EdgeLine foundEdge)
{
foundEdge = null;
if (tri == null)
{
return(false);
}
if (SameCoord(foundEdge = tri.e0, edgeLine) ||
SameCoord(foundEdge = tri.e1, edgeLine) ||
SameCoord(foundEdge = tri.e2, edgeLine))
{
return(true);
}
foundEdge = null; //not found
return(false);
}
internal void CreateGlyphEdges()
{
int lim = flattenPoints.Count - 1;
GlyphPoint p = null, q = null;
OutsideEdgeLine edgeLine = null;
_edges = new List <OutsideEdgeLine>();
//
for (int i = 0; i < lim; ++i)
{
//in order ...
p = flattenPoints[i];
q = flattenPoints[i + 1];
if ((edgeLine = EdgeLine.FindCommonOutsideEdge(p, q)) != null)
{
//from p point to q
//so ...
//edgeLine is outwardEdge for p.
//edgeLine is inwardEdge for q.
//p.OutwardEdge = q.InwardEdge = edgeLine;
_edges.Add(edgeLine);
}
else
{
//?
}
}
//close
p = flattenPoints[lim];
q = flattenPoints[0];
if ((edgeLine = EdgeLine.FindCommonOutsideEdge(p, q)) != null)
{
//from p point to q
//so ...
//edgeLine is outwardEdge for p.
//edgeLine is inwardEdge for q.
//p.OutwardEdge = q.InwardEdge = edgeLine;
_edges.Add(edgeLine);
}
else
{
//not found
}
}
/// <summary>
/// check if the 2 triangle is matching or not
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns></returns>
static bool IsMatchingEdge(EdgeLine a, EdgeLine b)
{
//x-axis
if ((a.PX == b.PX && a.QX == b.QX) ||
(a.PX == b.QX && a.QX == b.PX))
{
//pass x-axis
//
//y_axis
if ((a.PY == b.PY && a.QY == b.QY) ||
(a.PY == b.QY && a.QY == b.PY))
{
return(true);
}
}
//otherwise...
return(false);
}
/// <summary>
/// add information about each edge of a triangle, compare to the contactEdge of a ownerEdgeJoint
/// </summary>
/// <param name="triangle"></param>
/// <param name="boneJoint"></param>
/// <param name="knownInsideEdge"></param>
static EdgeLine CreateTipEdgeIfNeed(
double cent_slopAngle,
GlyphTriangle triangle,
EdgeLine knownInsideEdge)
{
int outsideCount;
EdgeLine outside0, outside1, outside2, anotherInsideEdge;
ClassifyTriangleEdges(
triangle,
knownInsideEdge,
out anotherInsideEdge,
out outside0,
out outside1,
out outside2,
out outsideCount);
switch (outsideCount)
{
default: throw new NotSupportedException();
case 0:
case 1: break;
case 3: throw new NotImplementedException(); //TODO: implement this
case 2:
//tip end
//find which edge should be 'tip edge'
//in this version we compare each edge slope to centroid line slope.
//the most diff angle should be opposite edge (to the centroid) => tip edge
//-------------------------------------------------------------------------
EdgeLine tipEdge, notTipEdge;
SelectMostProperTipEdge(cent_slopAngle,
outside0,
outside1,
out tipEdge,
out notTipEdge);
return(tipEdge);
}
return(null);
}
void AnalyzeInsideEdge(EdgeLine d0, EdgeLine d1, EdgeLine d2)
{
if (d0._earlyInsideAnalysis)
{
return;
}
if (!d0.IsInside)
{
return;
}
//-------------------------------------------------
//maybeInsideEdge is Inside ***
//check another
if (d1.IsInside)
{
if (d2.IsInside)
{
//3 inside edges
}
else
{
//1 outside edge (d2)
//2 inside edges (d0,d1)
//find a perpendicular line
FindPerpendicular(d2, d0);
FindPerpendicular(d2, d1);
}
}
else if (d2.IsInside)
{
if (d1.IsInside)
{
//3 inside edges
}
else
{
//1 outside edge (d1)
//2 inside edges (d0,d2)
FindPerpendicular(d1, d0);
FindPerpendicular(d1, d2);
}
}
}
void AnalyzeOutsideEdge(EdgeLine d, float centroidX, float centroidY)
{
//check if edge slope
if (!d.IsOutside) return;
//---------------------------
switch (d.SlopeKind)
{
case LineSlopeKind.Horizontal:
//check if upper or lower
//compare mid point with the centroid
d.IsUpper = d.GetMidPoint().Y > centroidY;
break;
case LineSlopeKind.Vertical:
d.IsLeftSide = d.GetMidPoint().X < centroidX;
break;
}
}
public GlyphTriangle(DelaunayTriangle tri)
{
this._tri = tri;
//---------------------------------------------
TriangulationPoint p0 = _tri.P0;
TriangulationPoint p1 = _tri.P1;
TriangulationPoint p2 = _tri.P2;
//we do not store triangulation points (p0,p1,02)
//an EdgeLine is created after we create GlyphTriangles.
//triangulate point p0->p1->p2 is CCW ***
e0 = NewEdgeLine(p0, p1, tri.EdgeIsConstrained(tri.FindEdgeIndex(p0, p1)));
e1 = NewEdgeLine(p1, p2, tri.EdgeIsConstrained(tri.FindEdgeIndex(p1, p2)));
e2 = NewEdgeLine(p2, p0, tri.EdgeIsConstrained(tri.FindEdgeIndex(p2, p0)));
//if the order of original glyph point is CW
//we may want to reverse the order of edge creation :
//p2->p1->p0
//link back
tri.userData = this;
//----------------
//early analyze
AnalyzeInsideEdge(e0, e1, e2);
AnalyzeInsideEdge(e1, e0, e2);
AnalyzeInsideEdge(e2, e0, e1);
//at this point,
//we should know the direction of this triangle
//then we known that if this triangle is left/right/upper/lower of the 'stroke' line
float cent_x, cent_y;
this.CalculateCentroid(out cent_x, out cent_y);
AnalyzeOutsideEdge(e0, cent_x, cent_y);
AnalyzeOutsideEdge(e1, cent_x, cent_y);
AnalyzeOutsideEdge(e2, cent_x, cent_y);
}
/// <summary>
/// add information about edges to each triangle and create BoneJoint and Tip
/// </summary>
public GlyphBoneJoint AnalyzeEdgesAndCreateBoneJoint()
{
#if DEBUG
if (p == q)
{
throw new NotSupportedException();
}
#endif
//2 contact triangles share GlyphBoneJoint.
//--------------------------------------
//[C]
//Find relation between edges of 2 triangle p and q
//....
//pick up a edge of p and compare to all edge of q
//do until complete
GlyphBoneJoint boneJoint = null;
InsideEdgeLine p_edge, q_edge;
if (FindCommonInsideEdges(p, q, out p_edge, out q_edge))
{
//create joint
boneJoint = new GlyphBoneJoint(p_edge, q_edge);
double slopeAngle = CalculateCentroidPairSlopeNoDirection(this);
//
EdgeLine foundTipEdge = null;
if ((foundTipEdge = CreateTipEdgeIfNeed(slopeAngle, p, p_edge)) != null)
{
//P
boneJoint.SetTipEdge_P(foundTipEdge);
}
if ((foundTipEdge = CreateTipEdgeIfNeed(slopeAngle, q, q_edge)) != null)
{
//Q
boneJoint.SetTipEdge_Q(foundTipEdge);
}
}
return(boneJoint);
}
internal GlyphBoneJoint(
InsideEdgeLine p_contact_edge,
InsideEdgeLine q_contact_edge)
{
//both p and q is INSIDE, contact edge
this._p_contact_edge = p_contact_edge;
this._q_contact_edge = q_contact_edge;
//this is original x,y
Vector2 midpos = p_contact_edge.GetMidPoint();
this._fitX = midpos.X;
this._fitY = midpos.Y;
#if DEBUG
if (p_contact_edge.inside_joint != null ||
q_contact_edge.inside_joint != null)
{
throw new System.NotSupportedException();
}
#endif
p_contact_edge.inside_joint = this;
q_contact_edge.inside_joint = this;
}
static InsideEdgeLine FindCommonInsideEdge(GlyphTriangle a, EdgeLine b_edge)
{
//2 contact triangles share GlyphBoneJoint.
//compare 3 side of a's edge to b_edge
if (b_edge.IsOutside)
{
return(null);
}
//
if (IsMatchingEdge(a.e0, b_edge))
{
return((InsideEdgeLine)a.e0);
}
if (IsMatchingEdge(a.e1, b_edge))
{
return((InsideEdgeLine)a.e1);
}
if (IsMatchingEdge(a.e2, b_edge))
{
return((InsideEdgeLine)a.e2);
}
return(null);
}
static void SelectMostProperTipEdge(
double slopeAngle,
EdgeLine outside0,
EdgeLine outside1,
out EdgeLine tipEdge,
out EdgeLine notTipEdge)
{
//slop angle in rad
double diff0 = Math.Abs(outside0.GetSlopeAngleNoDirection() - slopeAngle);
double diff1 = Math.Abs(outside1.GetSlopeAngleNoDirection() - slopeAngle);
if (diff0 > diff1)
{
tipEdge = outside0;
notTipEdge = outside1;
}
else
{
tipEdge = outside1;
notTipEdge = outside0;
}
}
internal static bool ContainsTriangle(this EdgeLine edge, GlyphTriangle p)
{
return(p.e0 == edge ||
p.e1 == edge ||
p.e2 == edge);
}
internal static double GetSlopeAngleNoDirection(this EdgeLine line)
{
return(Math.Abs(Math.Atan2(Math.Abs(line.QY - line.PY), Math.Abs(line.QX - line.PX))));
}
public static Vector2 GetMidPoint(this EdgeLine line)
{
return(new Vector2((float)((line.PX + line.QX) / 2), (float)((line.PY + line.QY) / 2)));
}
static void ClassifyTriangleEdges(
GlyphTriangle triangle,
EdgeLine knownInsideEdge,
out EdgeLine anotherInsideEdge,
out EdgeLine outside0,
out EdgeLine outside1,
out EdgeLine outside2,
out int outsideCount)
{
outsideCount = 0;
outside0 = outside1 = outside2 = anotherInsideEdge = null;
if (triangle.e0.IsOutside)
{
switch (outsideCount)
{
case 0: outside0 = triangle.e0; break;
case 1: outside1 = triangle.e0; break;
case 2: outside2 = triangle.e0; break;
}
outsideCount++;
}
else
{
//e0 is not known inside edge
if (triangle.e0 != knownInsideEdge)
{
anotherInsideEdge = triangle.e0;
}
}
//
if (triangle.e1.IsOutside)
{
switch (outsideCount)
{
case 0: outside0 = triangle.e1; break;
case 1: outside1 = triangle.e1; break;
case 2: outside2 = triangle.e1; break;
}
outsideCount++;
}
else
{
if (triangle.e1 != knownInsideEdge)
{
anotherInsideEdge = triangle.e1;
}
}
//
if (triangle.e2.IsOutside)
{
switch (outsideCount)
{
case 0: outside0 = triangle.e2; break;
case 1: outside1 = triangle.e2; break;
case 2: outside2 = triangle.e2; break;
}
outsideCount++;
}
else
{
if (triangle.e2 != knownInsideEdge)
{
anotherInsideEdge = triangle.e2;
}
}
}
/// <summary>
/// adjust vertical fitting value
/// </summary>
void ReCalculateFittingValues()
{
//(1)
//clear all prev adjust value
for (int i = _contours.Count - 1; i >= 0; --i)
{
List <GlyphPoint> pnts = _contours[i].flattenPoints;
for (int m = pnts.Count - 1; m >= 0; --m)
{
pnts[m].ResetFitAdjustValues();
}
}
//adjust the value when we move to new pixel scale (pxscale)
//if we known adjust values for that pxscale before( and cache it)
//we can use that without recalculation
//--------------------
//(2)
//select Horizontal BoneGroups for Vertical fitting:
//for veritical fitting, we apply fitting value to each group.
//each group may not need the same value.
//--------------------
List <BoneGroup> selectedHBoneGroups = _groupingHelper.SelectedHorizontalBoneGroups;
for (int i = selectedHBoneGroups.Count - 1; i >= 0; --i)
{
BoneGroup boneGroup = selectedHBoneGroups[i];
if (boneGroup._lengKind == BoneGroupSumLengthKind.Short)
{
continue;
}
EdgeLine[] h_edges = boneGroup.edges;
if (h_edges == null)
{
continue;
}
//
int edgeCount = h_edges.Length;
//we need to calculate the avg of the glyph point
//and add a total summary to this
FitDiffCollector y_fitDiffCollector = new FitDiffCollector();
float groupLen = boneGroup.approxLength;
//
for (int e = edgeCount - 1; e >= 0; --e)
{
EdgeLine ee = h_edges[e];
//p
y_fitDiffCollector.Collect(MyMath.CalculateDiffToFit(ee.P.Y * _pxScale), groupLen);
//q
y_fitDiffCollector.Collect(MyMath.CalculateDiffToFit(ee.Q.Y * _pxScale), groupLen);
}
float avg_ydiff = y_fitDiffCollector.CalculateProperDiff();
for (int e = edgeCount - 1; e >= 0; --e)
{
//TODO: review here again
EdgeLine ee = h_edges[e];
ee.P.FitAdjustY = avg_ydiff; //assign px scale specific fit value
ee.Q.FitAdjustY = avg_ydiff; //assign px scale specific fit value
}
}
//---------------------------------------------------------
//(3)
//vertical group for horizontal fit:
//this different from the vertical fitting.
//we calculate the value as a whole.
//and apply it as a whole in later state
List <BoneGroup> verticalGroups = _groupingHelper.SelectedVerticalBoneGroups;
FitDiffCollector x_fitDiffCollector = new FitDiffCollector();
int j = verticalGroups.Count;
for (int i = 0; i < j; ++i)
{
//1. the verticalGroup list is sorted, left to right
//2. analyze in order left-> right
BoneGroup boneGroup = verticalGroups[i];
if (boneGroup._lengKind != BoneGroupSumLengthKind.Long)
{
//in this case we focus on long-length bone group only
continue;
}
EdgeLine[] v_edges = boneGroup.edges;
if (v_edges == null)
{
continue;
}
int edgeCount = v_edges.Length;
//we need to calculate the avg of the glyph point
//and add a total summary to this
float groupLen = boneGroup.approxLength;
for (int e = 0; e < edgeCount; ++e)
{
EdgeLine ee = v_edges[e];
//TODO: review this
//if (ee.IsLeftSide)
//{
//focus on leftside edge
//p
x_fitDiffCollector.Collect(MyMath.CalculateDiffToFit(ee.P.X * _pxScale), groupLen);
//q
x_fitDiffCollector.Collect(MyMath.CalculateDiffToFit(ee.Q.X * _pxScale), groupLen);
//}
}
//TODO: review here ***
break; //only left most first long group ?
}
//(4)
_avg_x_fitOffset = x_fitDiffCollector.CalculateProperDiff();
}
protected abstract void OnTriangle(int triAngleId, EdgeLine e0, EdgeLine e1, EdgeLine e2, double centroidX, double centroidY);
static bool ContainsEdge(GlyphTriangle tri, EdgeLine edge)
{
return(tri.e0 == edge || tri.e1 == edge || tri.e2 == edge);
}
protected abstract void OnGlyphEdgeN(EdgeLine edge);