public TransformBezierControlPoints(BezierControlPoint[] points)
{
DefaultPoints = new BezierControlPoint[points.Length];
for (int i = 0; i < points.Length; i++)
{
DefaultPoints[i] = points[i].Clone();
}
var first = DefaultPoints[0] as BezierControlPoint;
float top = first.Second.Y;
float left = first.Second.X;
float bottom = first.Second.Y;
float right = first.Second.X;
for (int i = 1; i < DefaultPoints.Length; i++)
{
var temp = DefaultPoints[i] as BezierControlPoint;
BezierCaliculate.GetArea(first, temp, out float minx, out float maxx, out float miny, out float maxy);
top = Math.Min(top, miny);
bottom = Math.Max(bottom, maxy);
left = Math.Min(left, minx);
right = Math.Max(right, maxx);
first = temp;
}
TransRec = new TransformRectangle(
new PointF(left, top),
new PointF(right, top),
new PointF(left, bottom),
new PointF(right, bottom)
);
}
private void DrawBezeier(PointF p1, PointF p2, PointF p3, PointF p4, Graphics g)
{
PointF lastbezeirpoint, bezeirpoint;
lastbezeirpoint = p1;
var count = BezierCaliculate.AboutBezeirCount(ref p1, ref p2, ref p3, ref p4);
for (int i = count; i >= 0; i--)
{
float t = (float)i / count;
bezeirpoint = BezierCaliculate.GetBezeirPoint(ref p1, ref p2, ref p3, ref p4, ref t);
g.DrawLine(Pens.Black, lastbezeirpoint, bezeirpoint);
lastbezeirpoint = bezeirpoint;
}
}
private void DrawBezeier(PointF p1, PointF p2, PointF p3, PointF p4, IBezierDrawContext context)
{
PointF lastbezeirpoint, bezeirpoint;
lastbezeirpoint = p1;
var count = BezierCaliculate.AboutBezeirCount(ref p1, ref p2, ref p3, ref p4);
for (int i = count; i >= 0; i--)
{
float t = (float)i / count;
bezeirpoint = BezierCaliculate.GetBezeirPoint(ref p1, ref p2, ref p3, ref p4, ref t);
context.DrawLine(Color.Black, lastbezeirpoint, bezeirpoint);
lastbezeirpoint = bezeirpoint;
}
}
private void BezierRatioDrawer_MouseMove(object sender, MouseEventArgs e)
{
float x = e.X, y = e.Y;
if (x < 0)
{
x = 0;
}
if (x > this.Width)
{
x = this.Width;
}
if (y < 0)
{
y = 0;
}
if (y > this.Height)
{
y = this.Height;
}
var mousepos = new PointF(x, y);
if (selected != null)
{
if (selected == bcps[0])
{
var f = new PointF(mousepos.X - selected.Second.X, mousepos.Y - selected.Second.Y);
var nv = BezierCaliculate.GetNormalizePoint(f);
selected.ThirdDirection = nv;
selected.ThirdLength = GetLength(f);
IsLinear = false;
DrawandRefresh();
}
else if (selected == bcps[1])
{
var f = new PointF(mousepos.X - selected.Second.X, mousepos.Y - selected.Second.Y);
var nv = BezierCaliculate.GetNormalizePoint(f);
selected.FirstDirection = nv;
selected.FirstLength = GetLength(f);
IsLinear = false;
DrawandRefresh();
}
}
}
private void NormalMouseDown(PointF downpos, bool isLeftButton, Keys modifierKeys)
{
if ((modifierKeys & Keys.Control) == Keys.Control)
{
bool foundanchor = false;
if (SelectedPoint != null && SelectedPoint.ValidFirst && SelectedPoint.ValidThird)
{
if (IsInside(SelectedPoint.First, downpos))
{
foundanchor = true;
changedFlag = true;
mode = Mode.ChangeFirst;
}
else if (IsInside(SelectedPoint.Third, downpos))
{
foundanchor = true;
changedFlag = true;
mode = Mode.ChangeThird;
}
}
if (!foundanchor)
{
SelectedPoint = null;
for (int i = 0; i < data.Count; i++)
{
var bcp = data[i] as BezierControlPoint;
if (IsInside(bcp.Second, downpos))
{
SelectedPoint = bcp;
changedFlag = true;
mode = Mode.Move;
break;
}
}
}
}
else if ((modifierKeys & Keys.Shift) == Keys.Shift)
{
SelectedPoint = null;
for (int i = 0; i < data.Count; i++)
{
var bcp = data[i] as BezierControlPoint;
if (IsInside(bcp.Second, downpos))
{
SelectedPoint = bcp;
changedFlag = true;
mode = Mode.RestrictMove;
break;
}
}
}
else if ((modifierKeys & Keys.Alt) == Keys.Alt)
{
bool foundanchor = false;
if (SelectedPoint != null && SelectedPoint.ValidFirst && SelectedPoint.ValidThird)
{
if (IsInside(SelectedPoint.First, downpos))
{
foundanchor = true;
changedFlag = true;
mode = Mode.ChangeOnlyFirst;
}
else if (IsInside(SelectedPoint.Third, downpos))
{
foundanchor = true;
changedFlag = true;
mode = Mode.ChangeOnlyThird;
}
}
if (!foundanchor)
{
SelectedPoint = null;
for (int i = 0; i < data.Count; i++)
{
var bcp = data[i] as BezierControlPoint;
if (IsInside(bcp.Second, downpos))
{
SelectedPoint = bcp;
bcp.ValidFirst = false;
bcp.ValidThird = false;
bcp.FirstDirection = new PointF(0, 0);
bcp.FirstLength = 0;
bcp.ThirdDirection = new PointF(0, 0);
bcp.ThirdLength = 0;
mode = Mode.ChangeBoth;
changedFlag = true;
break;
}
}
}
}
else if (isLeftButton)
{
BezierControlPoint next = null;
if (IsOnLine(downpos, out BezierControlPoint previous, out float t))
{
if (data.Count >= 2 && previous == data[0] && data[0] != data[data.Count - 1] && t >= 0.95)
{
//loop
SelectedPoint = previous;
data.Add(previous);
changedFlag = true;
OnEdited(EditType.Add, data.Count - 1);
}
else
{
var index = data.IndexOf(previous);
if (index < data.Count - 1)
{
next = data[index + 1] as BezierControlPoint;
}
BezierCaliculate.GetDevidedBeziers(previous, next, t, out BezierControlPoint bcp1, out BezierControlPoint bcp2, out BezierControlPoint bcp3);
var previousIndex = data.IndexOf(previous);
data[previousIndex] = bcp1;
data[previousIndex + 1] = bcp3;
data.Insert(previousIndex + 1, bcp2);
SelectedPoint = bcp2;
changedFlag = true;
OnEdited(EditType.Add, previousIndex + 1);
}
}
else
{
var bcp = new BezierControlPoint
{
Second = downpos
};
data.Add(bcp);
SelectedPoint = bcp;
changedFlag = true;
OnEdited(EditType.Add, data.Count - 1);
}
}
private PointF GetNormalizePoint(PointF p1, PointF p2)
{
var temp = new PointF(p1.X + p2.X, p1.Y + p2.Y);
return(BezierCaliculate.GetNormalizePoint(temp));
}