private int AddJoint(int pointIndex, ref JoinSample joinSample, PenWorkspace ws, Buffer <CCVector2> insetBuffer, Buffer <CCVector2> outsetBuffer)
{
InsetOutsetCount vioCount = new InsetOutsetCount();
switch (_pen.LineJoin)
{
case LineJoin.Miter:
vioCount = _pen.ComputeMiter(ref joinSample, ws);
break;
case LineJoin.Bevel:
vioCount = _pen.ComputeBevel(ref joinSample, ws);
break;
}
if (insetBuffer != null)
{
for (int i = 0; i < vioCount.InsetCount; i++)
{
insetBuffer.SetNext(ws.XYInsetBuffer[i]);
}
}
if (outsetBuffer != null)
{
for (int i = 0; i < vioCount.OutsetCount; i++)
{
outsetBuffer.SetNext(ws.XYOutsetBuffer[i]);
}
}
return((_strokeType != StrokeType.Outline) ? AddJoint(pointIndex, vioCount, ws) : 0);
}
//internal InsetOutsetCount ComputeBevel (Vector2 a, Vector2 b, Vector2 c, PenWorkspace ws)
internal InsetOutsetCount ComputeBevel(ref JoinSample js, PenWorkspace ws)
{
Vector2 a = js.PointA;
Vector2 b = js.PointB;
Vector2 c = js.PointC;
Vector2 edgeBA = new Vector2(a.X - b.X, a.Y - b.Y);
Vector2 edgeBC = new Vector2(c.X - b.X, c.Y - b.Y);
double dot = Vector2.Dot(edgeBA, edgeBC);
if (dot < 0)
{
double den = edgeBA.LengthSquared() * edgeBC.LengthSquared();
double cos2 = (dot * dot) / den;
if (cos2 > _joinLimitCos2)
{
return(ComputeMiter(ref js, ws));
}
}
Vector2 edgeAB = new Vector2(b.X - a.X, b.Y - a.Y);
edgeAB.Normalize();
Vector2 edgeABt = new Vector2(-edgeAB.Y, edgeAB.X);
edgeBC.Normalize();
Vector2 edgeBCt = new Vector2(-edgeBC.Y, edgeBC.X);
Vector2 pointA = a;
Vector2 pointC = c;
short vertexCount = 0;
if (Cross2D(edgeAB, edgeBC) > 0)
{
switch (Alignment)
{
case PenAlignment.Center:
float w2 = Width / 2;
pointA = new Vector2(a.X - w2 * edgeABt.X, a.Y - w2 * edgeABt.Y);
pointC = new Vector2(c.X - w2 * edgeBCt.X, c.Y - w2 * edgeBCt.Y);
ws.XYInsetBuffer[0] = new Vector2(b.X + w2 * edgeABt.X, b.Y + w2 * edgeABt.Y);
ws.XYInsetBuffer[1] = new Vector2(b.X + w2 * edgeBCt.X, b.Y + w2 * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Inset:
ws.XYInsetBuffer[0] = new Vector2(b.X + Width * edgeABt.X, b.Y + Width * edgeABt.Y);
ws.XYInsetBuffer[1] = new Vector2(b.X + Width * edgeBCt.X, b.Y + Width * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Outset:
pointA = new Vector2(a.X - Width * edgeABt.X, a.Y - Width * edgeABt.Y);
pointC = new Vector2(c.X - Width * edgeBCt.X, c.Y - Width * edgeBCt.Y);
ws.XYInsetBuffer[0] = b;
vertexCount = 1;
break;
}
Vector2 point5;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < 0.0005f)
{
point5 = new Vector2((pointA.X + pointC.X) / 2, (pointA.Y + pointC.Y) / 2);
}
else
{
float offset35 = Vector2.Dot(edgeBCt, pointC);
float t5 = (offset35 - Vector2.Dot(edgeBCt, pointA)) / tdiv;
point5 = new Vector2(pointA.X + t5 * edgeAB.X, pointA.Y + t5 * edgeAB.Y);
}
ws.XYOutsetBuffer[0] = point5;
ws.UVOutsetBuffer[0] = new Vector2(1, js.LengthB);
for (int i = 0; i < vertexCount; i++)
{
ws.UVInsetBuffer[i] = new Vector2(0, js.LengthB);
}
return(new InsetOutsetCount(vertexCount, 1, false));
}
else
{
switch (Alignment)
{
case PenAlignment.Center:
float w2 = Width / 2;
pointA = new Vector2(a.X + w2 * edgeABt.X, a.Y + w2 * edgeABt.Y);
pointC = new Vector2(c.X + w2 * edgeBCt.X, c.Y + w2 * edgeBCt.Y);
ws.XYOutsetBuffer[0] = new Vector2(b.X - w2 * edgeABt.X, b.Y - w2 * edgeABt.Y);
ws.XYOutsetBuffer[1] = new Vector2(b.X - w2 * edgeBCt.X, b.Y - w2 * edgeBCt.Y);
vertexCount = 2;
break;
case PenAlignment.Inset:
pointA = new Vector2(a.X + Width * edgeABt.X, a.Y + Width * edgeABt.Y);
pointC = new Vector2(c.X + Width * edgeBCt.X, c.Y + Width * edgeBCt.Y);
ws.XYOutsetBuffer[0] = b;
vertexCount = 1;
break;
case PenAlignment.Outset:
ws.XYOutsetBuffer[0] = new Vector2(b.X - Width * edgeABt.X, b.Y - Width * edgeABt.Y);
ws.XYOutsetBuffer[1] = new Vector2(b.X - Width * edgeBCt.X, b.Y - Width * edgeBCt.Y);
vertexCount = 2;
break;
}
Vector2 point0;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < 0.0005f)
{
point0 = new Vector2((pointA.X + pointC.X) / 2, (pointA.Y + pointC.Y) / 2);
}
else
{
float offset01 = Vector2.Dot(edgeBCt, pointC);
float t0 = (offset01 - Vector2.Dot(edgeBCt, pointA)) / tdiv;
point0 = new Vector2(pointA.X + t0 * edgeAB.X, pointA.Y + t0 * edgeAB.Y);
}
ws.XYInsetBuffer[0] = point0;
ws.UVInsetBuffer[0] = new Vector2(0, js.LengthB);
for (int i = 0; i < vertexCount; i++)
{
ws.UVOutsetBuffer[i] = new Vector2(1, js.LengthB);
}
return(new InsetOutsetCount(1, vertexCount, true));
}
}
//internal InsetOutsetCount ComputeMiter (Vector2 a, Vector2 b, Vector2 c, PenWorkspace ws)
internal InsetOutsetCount ComputeMiter(ref JoinSample js, PenWorkspace ws)
{
Vector2 a = js.PointA;
Vector2 b = js.PointB;
Vector2 c = js.PointC;
Vector2 edgeAB = new Vector2(b.X - a.X, b.Y - a.Y);
edgeAB.Normalize();
Vector2 edgeABt = new Vector2(-edgeAB.Y, edgeAB.X);
Vector2 edgeBC = new Vector2(c.X - b.X, c.Y - b.Y);
edgeBC.Normalize();
Vector2 edgeBCt = new Vector2(-edgeBC.Y, edgeBC.X);
Vector2 point1, point2, point3, point4;
switch (Alignment)
{
case PenAlignment.Center:
float w2 = Width / 2;
point2 = new Vector2(a.X + w2 * edgeABt.X, a.Y + w2 * edgeABt.Y);
point4 = new Vector2(a.X - w2 * edgeABt.X, a.Y - w2 * edgeABt.Y);
point1 = new Vector2(c.X + w2 * edgeBCt.X, c.Y + w2 * edgeBCt.Y);
point3 = new Vector2(c.X - w2 * edgeBCt.X, c.Y - w2 * edgeBCt.Y);
break;
case PenAlignment.Inset:
point2 = new Vector2(a.X + Width * edgeABt.X, a.Y + Width * edgeABt.Y);
point4 = a;
point1 = new Vector2(c.X + Width * edgeBCt.X, c.Y + Width * edgeBCt.Y);
point3 = c;
break;
case PenAlignment.Outset:
point2 = a;
point4 = new Vector2(a.X - Width * edgeABt.X, a.Y - Width * edgeABt.Y);
point1 = c;
point3 = new Vector2(c.X - Width * edgeBCt.X, c.Y - Width * edgeBCt.Y);
break;
default:
point2 = Vector2.Zero;
point4 = Vector2.Zero;
point1 = Vector2.Zero;
point3 = Vector2.Zero;
break;
}
Vector2 point0, point5;
float tdiv = Vector2.Dot(edgeBCt, edgeAB);
if (Math.Abs(tdiv) < .0005f)
{
point0 = new Vector2((point2.X + point1.X) / 2, (point2.Y + point1.Y) / 2);
point5 = new Vector2((point4.X + point3.X) / 2, (point4.Y + point3.Y) / 2);
}
else
{
float offset01 = Vector2.Dot(edgeBCt, point1);
float t0 = (offset01 - Vector2.Dot(edgeBCt, point2)) / tdiv;
float offset35 = Vector2.Dot(edgeBCt, point3);
float t5 = (offset35 - Vector2.Dot(edgeBCt, point4)) / tdiv;
point0 = new Vector2(point2.X + t0 * edgeAB.X, point2.Y + t0 * edgeAB.Y);
point5 = new Vector2(point4.X + t5 * edgeAB.X, point4.Y + t5 * edgeAB.Y);
}
double miterLimit = MiterLimit * Width;
if ((point0 - point5).LengthSquared() > miterLimit * miterLimit)
{
return(ComputeBevel(ref js, ws));
}
ws.XYInsetBuffer[0] = point0;
ws.XYOutsetBuffer[0] = point5;
ws.UVInsetBuffer[0] = new Vector2(0, js.LengthB);
ws.UVOutsetBuffer[0] = new Vector2(1, js.LengthB);
return(new InsetOutsetCount(1, 1));
}
private void CompileClosedPath(IList <CCVector2> points, IList <float> accumLengths, int offset, int count, Pen outlinePen)
{
if (_strokeType != StrokeType.Outline)
{
InitializeBuffers(count + 1);
}
if (IsClose(points[offset], points[offset + count - 1]))
{
count--;
}
IList <float> lengths = accumLengths ?? _zeroList;
Buffer <CCVector2> insetBuffer = null;
Buffer <CCVector2> outsetBuffer = null;
if (outlinePen != null && _strokeType != StrokeType.Fill)
{
insetBuffer = Pools <Buffer <CCVector2> > .Obtain();
outsetBuffer = Pools <Buffer <CCVector2> > .Obtain();
int vCount = _positionData != null ? _positionData.Length : _pen.MaximumVertexCount(count);
insetBuffer.EnsureCapacity(vCount);
outsetBuffer.EnsureCapacity(vCount);
}
PenWorkspace ws = Pools <PenWorkspace> .Obtain();
ws.ResetWorkspace(_pen);
JoinSample joinSample = new JoinSample(points[offset + count - 1], points[offset + 0], points[offset + 1], 0, lengths[offset + 0], lengths[offset + 1]);
int vBaseIndex = _vertexBufferIndex;
int vBaseCount = AddJoint(0, ref joinSample, ws, insetBuffer, outsetBuffer);
int vPrevCount = 0;
int vNextCount = vBaseCount;
for (int i = 0; i < count - 2; i++)
{
joinSample.Advance(points[offset + i + 2], lengths[offset + i + 2]);
vPrevCount = vNextCount;
vNextCount = AddJoint(i + 1, ref joinSample, ws, insetBuffer, outsetBuffer);
if (_strokeType != StrokeType.Outline)
{
AddSegment(_vertexBufferIndex - vNextCount - vPrevCount, vPrevCount, _jointCCW[i], _vertexBufferIndex - vNextCount, vNextCount, _jointCCW[i + 1]);
}
}
joinSample.Advance(points[offset + 0], lengths[offset + 0]);
vPrevCount = vNextCount;
vNextCount = AddJoint(count - 1, ref joinSample, ws, insetBuffer, outsetBuffer);
if (_strokeType != StrokeType.Outline)
{
AddSegment(_vertexBufferIndex - vNextCount - vPrevCount, vPrevCount, _jointCCW[count - 2], _vertexBufferIndex - vNextCount, vNextCount, _jointCCW[count - 1]);
AddSegment(_vertexBufferIndex - vNextCount, vNextCount, _jointCCW[count - 1], vBaseIndex, vBaseCount, _jointCCW[0]);
}
Pools <PenWorkspace> .Release(ws);
if (outlinePen != null && _strokeType != StrokeType.Fill)
{
Array.Reverse(insetBuffer.Data, 0, insetBuffer.Index);
_outlinePaths = new GraphicsPath[] {
new GraphicsPath(outlinePen, insetBuffer.Data, PathType.Closed, 0, insetBuffer.Index),
new GraphicsPath(outlinePen, outsetBuffer.Data, PathType.Closed, 0, outsetBuffer.Index),
};
Pools <Buffer <CCVector2> > .Release(insetBuffer);
Pools <Buffer <CCVector2> > .Release(outsetBuffer);
}
}
private void CompileOpenPath(IList <CCVector2> points, IList <float> accumLengths, int offset, int count, Pen outlinePen)
{
if (_strokeType != StrokeType.Outline)
{
InitializeBuffers(count);
}
IList <float> lengths = accumLengths ?? _zeroList;
Buffer <CCVector2> insetBuffer = null;
Buffer <CCVector2> outsetBuffer = null;
if (outlinePen != null && _strokeType != StrokeType.Fill)
{
insetBuffer = Pools <Buffer <CCVector2> > .Obtain();
outsetBuffer = Pools <Buffer <CCVector2> > .Obtain();
int vCount = _positionData != null ? _positionData.Length : _pen.MaximumVertexCount(count);
insetBuffer.EnsureCapacity(vCount);
outsetBuffer.EnsureCapacity(vCount);
}
PenWorkspace ws = Pools <PenWorkspace> .Obtain();
ws.ResetWorkspace(_pen);
ws.PathLength = lengths[offset + count - 1];
int vPrevCount = 0;
int vNextCount = AddStartPoint(0, points[offset + 0], points[offset + 1], ws, insetBuffer);
if (insetBuffer != null)
{
Array.Reverse(insetBuffer.Data, 0, insetBuffer.Index);
}
JoinSample joinSample = new JoinSample(CCVector2.Zero, points[offset + 0], points[offset + 1], 0, lengths[offset + 0], lengths[offset + 1]);
for (int i = 0; i < count - 2; i++)
{
joinSample.Advance(points[offset + i + 2], lengths[offset + i + 2]);
vPrevCount = vNextCount;
vNextCount = AddJoint(i + 1, ref joinSample, ws, insetBuffer, outsetBuffer);
if (_strokeType != StrokeType.Outline)
{
AddSegment(_vertexBufferIndex - vNextCount - vPrevCount, vPrevCount, _jointCCW[i], _vertexBufferIndex - vNextCount, vNextCount, _jointCCW[i + 1]);
}
}
/*for (int i = 0; i < count - 2; i++) {
* int i0 = offset + i;
* int i1 = i0 + 1;
* int i2 = i0 + 2;
*
* vPrevCount = vNextCount;
* vNextCount = AddJoint(i + 1, points[i0], points[i1], points[i2], lengths[i0], lengths[i1], lengths[i2], ws, insetBuffer, outsetBuffer);
* if (_strokeType != StrokeType.Outline)
* AddSegment(_vertexBufferIndex - vNextCount - vPrevCount, vPrevCount, _jointCCW[i], _vertexBufferIndex - vNextCount, vNextCount, _jointCCW[i + 1]);
* }*/
vPrevCount = vNextCount;
vNextCount = AddEndPoint(count - 1, points[offset + count - 2], points[offset + count - 1], ws, insetBuffer);
if (_strokeType != StrokeType.Outline)
{
AddSegment(_vertexBufferIndex - vNextCount - vPrevCount, vPrevCount, _jointCCW[count - 2], _vertexBufferIndex - vNextCount, vNextCount, _jointCCW[count - 1]);
}
if (insetBuffer != null)
{
Array.Reverse(insetBuffer.Data, 0, insetBuffer.Index);
}
Pools <PenWorkspace> .Release(ws);
if (outlinePen != null && _strokeType != StrokeType.Fill)
{
Buffer <CCVector2> mergedBuffer = Pools <Buffer <CCVector2> > .Obtain();
mergedBuffer.EnsureCapacity(insetBuffer.Index + outsetBuffer.Index);
Array.Copy(insetBuffer.Data, 0, mergedBuffer.Data, 0, insetBuffer.Index);
Array.Copy(outsetBuffer.Data, 0, mergedBuffer.Data, insetBuffer.Index, outsetBuffer.Index);
_outlinePaths = new GraphicsPath[] {
new GraphicsPath(outlinePen, mergedBuffer.Data, PathType.Closed, 0, insetBuffer.Index + outsetBuffer.Index),
};
Pools <Buffer <CCVector2> > .Release(mergedBuffer);
Pools <Buffer <CCVector2> > .Release(insetBuffer);
Pools <Buffer <CCVector2> > .Release(outsetBuffer);
}
}
