/// <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 override VectorPoint Copy()
{
QuadLinePoint point = new QuadLinePoint(X, Y);
point.Length = Length;
point.Control1X = Control1X;
point.Control1Y = Control1Y;
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 = X;
float p2y = Y;
// The new points:
float p3x = p0x * invert + p1x * t;
float p3y = p0y * invert + p1y * t;
float p4x = p1x * invert + p2x * t;
float p4y = p1y * invert + p2y * t;
float p5x = p3x * invert + p4x * t;
float p5y = p3y * invert + p4y * t;
// This curve will become the new 1st half:
QuadLinePoint from = new QuadLinePoint(p5x, p5y);
from.Control1X = p3x;
from.Control1Y = p3y;
if (addNext)
{
// Create the next one:
QuadLinePoint to = new QuadLinePoint(p2x, p2y);
to.Control1X = p4x;
to.Control1Y = p4y;
// Update length:
to.Length = invert * Length;
to.Previous = from;
from.Next = to;
if (IsClose)
{
to.IsClose = true;
}
}
from.Length = t * Length;
return(from);
}
public QuadLinePoint QuadraticCurveTo(float cx, float cy, float x, float y)
{
// Create the curve line:
QuadLinePoint newNode = new QuadLinePoint(x, y);
newNode.Control1X = cx;
newNode.Control1Y = cy;
// Add it:
AddPathNode(newNode);
return(newNode);
}
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=X;
float p2y=Y;
// The new points:
float p3x=p0x * invert + p1x * t;
float p3y=p0y * invert + p1y * t;
float p4x=p1x * invert + p2x * t;
float p4y=p1y * invert + p2y * t;
float p5x=p3x * invert + p4x * t;
float p5y=p3y * invert + p4y * t;
// This curve will become the new 1st half:
Control1X=p3x;
Control1Y=p3y;
X=p5x;
Y=p5y;
path.PathNodeCount++;
// Create the next one:
QuadLinePoint point=new QuadLinePoint(p2x,p2y);
point.Control1X=p4x;
point.Control1Y=p4y;
// 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 AddControl(float x, float y, VectorPath path, out int id)
{
// Create:
QuadLinePoint pt = new QuadLinePoint(X, Y);
pt.Control1X = x;
pt.Control1Y = y;
// Remove this and add pt in it's place:
ReplaceWith(pt, path);
id = 1;
return(pt);
}
public override VectorPoint Copy(){
QuadLinePoint point=new QuadLinePoint(X,Y);
point.Length=Length;
point.NormalX=NormalX;
point.NormalY=NormalY;
point.Control1X=Control1X;
point.Control1Y=Control1Y;
point.NormalC1X=NormalC1X;
point.NormalC1Y=NormalC1Y;
return point;
}
public override VectorPoint DeleteControl(int id, VectorPath path)
{
// Create:
QuadLinePoint pt = new QuadLinePoint(X, Y);
if (id == 1)
{
// Deleting control point 1.
pt.Control1X = Control2X;
pt.Control1Y = Control2Y;
}
else
{
// Deleting control point 2.
pt.Control1X = Control1X;
pt.Control1Y = Control1Y;
}
// Remove this and add in it's place:
ReplaceWith(pt, path);
return(pt);
}
//--------------------------------------
