/// <summary>"Simplifies" the curve values ensuring that it's possible to offset the parts of the path.
/// Used by the path stroke system.</summary>
public void SimplifyCurve()
{
VectorPoint current = FirstPathNode;
while (current != null)
{
if (current.IsCurve)
{
CurveLinePoint clp = current as CurveLinePoint;
if (clp != null)
{
// Simplify:
clp.SimplifyCurve(this);
}
else
{
// Convert a QLP to a CLP:
QuadLinePoint qlp = current as QuadLinePoint;
if (qlp != null)
{
// Create but with both control points being the same:
clp = new CurveLinePoint(qlp.X, qlp.Y);
clp.Control1X = qlp.Control1X;
clp.Control1Y = qlp.Control1Y;
clp.Control2X = qlp.Control1X;
clp.Control2Y = qlp.Control1Y;
clp.IsClose = qlp.IsClose;
// Replace the node now:
if (qlp.Previous == null)
{
FirstPathNode = clp;
}
else
{
qlp.Previous.Next = clp;
}
if (qlp.Next == null)
{
LatestPathNode = clp;
}
else
{
qlp.Next.Previous = clp;
}
}
}
}
current = current.Next;
}
}
public void CurveTo(float c1x, float c1y, float c2x, float c2y, float x, float y)
{
// Create the curve line:
CurveLinePoint newNode = new CurveLinePoint(x, y);
newNode.Control1X = c1x;
newNode.Control1Y = c1y;
newNode.Control2X = c2x;
newNode.Control2Y = c2y;
// Add it:
AddPathNode(newNode);
}
public override VectorPoint Copy()
{
CurveLinePoint point = new CurveLinePoint(X, Y);
point.Length = Length;
point.Control1X = Control1X;
point.Control1Y = Control1Y;
point.Control2X = Control2X;
point.Control2Y = Control2Y;
return(point);
}
public override VectorPoint AddControl(float x, float y, VectorPath path, out int id)
{
// Create:
CurveLinePoint pt = new CurveLinePoint(X, Y);
// Get the "progress" of x/y along the line, vs control point progress.
float C = X - Previous.X;
float D = Y - Previous.Y;
float len_sq = C * C + D * D;
float newProg = ProgressAlongFast(x, y, C, D, len_sq);
float p1Prog = ProgressAlongFast(Control1X, Control1Y, C, D, len_sq);
// Should this new control be control point #1?
bool first = (newProg < p1Prog);
if (first)
{
// Pt 1:
pt.Control1X = x;
pt.Control1Y = y;
pt.Control2X = Control1X;
pt.Control2Y = Control1Y;
id = 1;
}
else
{
// Pt 2:
pt.Control1X = Control1X;
pt.Control1Y = Control1Y;
pt.Control2X = x;
pt.Control2Y = y;
id = 2;
}
// Remove this and add in it's place:
ReplaceWith(pt, path);
return(pt);
}
//--------------------------------------
public override VectorPoint Copy(){
CurveLinePoint point=new CurveLinePoint(X,Y);
point.Length=Length;
point.NormalX=NormalX;
point.NormalY=NormalY;
point.Control1X=Control1X;
point.Control1Y=Control1Y;
point.Control2X=Control2X;
point.Control2Y=Control2Y;
point.NormalC1X=NormalC1X;
point.NormalC1Y=NormalC1Y;
point.NormalC2X=NormalC2X;
point.NormalC2Y=NormalC2Y;
return point;
}
public override VectorPoint Split(float t,VectorPath path){
float invert=1f-t;
float p0x=Previous.X;
float p0y=Previous.Y;
float p1x=Control1X;
float p1y=Control1Y;
float p2x=Control2X;
float p2y=Control2Y;
float p3x=X;
float p3y=Y;
// The new points:
float p4x=p0x * invert + p1x * t;
float p4y=p0y * invert + p1y * t;
float p5x=p1x * invert + p2x * t;
float p5y=p1y * invert + p2y * t;
float p6x=p2x * invert + p3x * t;
float p6y=p2y * invert + p3y * t;
float p7x=p4x * invert + p5x * t;
float p7y=p4y * invert + p5y * t;
float p8x=p5x * invert + p6x * t;
float p8y=p5y * invert + p6y * t;
float p9x=p7x * invert + p8x * t;
float p9y=p7y * invert + p8y * t;
// This curve will become the new 1st half:
Control1X=p4x;
Control1Y=p4y;
Control2X=p7x;
Control2Y=p7y;
X=p9x;
Y=p9y;
// Create the next one:
CurveLinePoint point=new CurveLinePoint(p3x,p3y);
point.Control1X=p8x;
point.Control1Y=p8y;
point.Control2X=p6x;
point.Control2Y=p6y;
path.PathNodeCount++;
// Insert after this:
if(Next==null){
path.LatestPathNode=point;
}else{
point.Next=Next;
Next.Previous=point;
}
point.Previous=this;
Next=point;
return point;
}
public override VectorPoint Split(float t, VectorPath path)
{
float invert = 1f - t;
float p0x = Previous.X;
float p0y = Previous.Y;
float p1x = Control1X;
float p1y = Control1Y;
float p2x = Control2X;
float p2y = Control2Y;
float p3x = X;
float p3y = Y;
// The new points:
float p4x = p0x * invert + p1x * t;
float p4y = p0y * invert + p1y * t;
float p5x = p1x * invert + p2x * t;
float p5y = p1y * invert + p2y * t;
float p6x = p2x * invert + p3x * t;
float p6y = p2y * invert + p3y * t;
float p7x = p4x * invert + p5x * t;
float p7y = p4y * invert + p5y * t;
float p8x = p5x * invert + p6x * t;
float p8y = p5y * invert + p6y * t;
float p9x = p7x * invert + p8x * t;
float p9y = p7y * invert + p8y * t;
// This curve will become the new 1st half:
Control1X = p4x;
Control1Y = p4y;
Control2X = p7x;
Control2Y = p7y;
X = p9x;
Y = p9y;
// Create the next one:
CurveLinePoint point = new CurveLinePoint(p3x, p3y);
point.Control1X = p8x;
point.Control1Y = p8y;
point.Control2X = p6x;
point.Control2Y = p6y;
path.PathNodeCount++;
// Insert after this:
if (Next == null)
{
path.LatestPathNode = point;
}
else
{
point.Next = Next;
Next.Previous = point;
}
// Update lengths:
point.Length = invert * Length;
Length = t * Length;
point.Previous = this;
Next = point;
if (IsClose)
{
IsClose = false;
point.IsClose = true;
path.CloseNode.ClosePoint = point;
}
return(point);
}
public override VectorPoint PointAt(float t, bool addNext)
{
float invert = 1f - t;
float p0x = Previous.X;
float p0y = Previous.Y;
float p1x = Control1X;
float p1y = Control1Y;
float p2x = Control2X;
float p2y = Control2Y;
float p3x = X;
float p3y = Y;
// The new points:
float p4x = p0x * invert + p1x * t;
float p4y = p0y * invert + p1y * t;
float p5x = p1x * invert + p2x * t;
float p5y = p1y * invert + p2y * t;
float p6x = p2x * invert + p3x * t;
float p6y = p2y * invert + p3y * t;
float p7x = p4x * invert + p5x * t;
float p7y = p4y * invert + p5y * t;
float p8x = p5x * invert + p6x * t;
float p8y = p5y * invert + p6y * t;
float p9x = p7x * invert + p8x * t;
float p9y = p7y * invert + p8y * t;
// Create the new first half:
CurveLinePoint from = new CurveLinePoint(p9x, p9y);
from.Control1X = p4x;
from.Control1Y = p4y;
from.Control2X = p7x;
from.Control2Y = p7y;
if (addNext)
{
// Create the next one:
CurveLinePoint to = new CurveLinePoint(p3x, p3y);
to.Control1X = p8x;
to.Control1Y = p8y;
to.Control2X = p6x;
to.Control2Y = p6y;
to.Previous = from;
from.Next = to;
// Update length:
to.Length = invert * Length;
if (IsClose)
{
to.IsClose = true;
}
}
from.Length = t * Length;
return(from);
}
