protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
// Create the new event
SplinePaintEventArgs se = new SplinePaintEventArgs(e, BezierMode, Radius, Thickness, Thickness);
// Is interpolation active?
if (InterpolationActive)
{
// Get a yellow coloured brush
Brush yBrush = new SolidBrush(Color.Yellow);
// Draw a circle to represent the current interpolation
e.Graphics.FillEllipse(yBrush, (m_InterPos.x - m_Camera.x) - Radius, (-(m_InterPos.y - m_Camera.y)) - Radius, Radius * 2f, Radius * 2f);
// Dispose of the brush
yBrush.Dispose();
}
// Draw each knot
SplinePaintCurve(this, se);
// Draw the knots tools
SplinePaintTools(this, se);
}
private void PaintTools_Hermite(Vector2 c, SplinePaintEventArgs e)
{
// Get the graphics from the event
Graphics g = e.PaintEvent.Graphics;
// Get a green brush and pen
Brush gBrush = new SolidBrush(Color.Green);
Pen gPen = new Pen(Color.Green, e.Radius / 2f);
// Does this knot have a previous?
if (m_Prev != null)
{
// Draw a circle to represent the in tangent
g.FillEllipse(gBrush, (m_Front.x - c.x) - e.Radius, (-(m_Front.y - c.y)) - e.Radius, e.Radius * 2f, e.Radius * 2f);
// Draw a line from the in tangent to the knots point
g.DrawLine(gPen, GetPos(m_Front, c), GetPos(m_Point, c));
}
// Does this knot have a next?
if (m_Next != null)
{
// Draw a circle to represent the out tangent
g.FillEllipse(gBrush, (m_After.x - c.x) - e.Radius, (-(m_After.y - c.y)) - e.Radius, e.Radius * 2f, e.Radius * 2f);
// Draw a line from the out tangent to the knots point
g.DrawLine(gPen, GetPos(m_Point, c), GetPos(m_After, c));
}
// Dispose of pens and brushes
gPen.Dispose();
gBrush.Dispose();
}
private void PaintTools_Bezier(Vector2 c, SplinePaintEventArgs e)
{
// Get the graphics from the event
Graphics g = e.PaintEvent.Graphics;
// Get a blue brush and pen
Brush bBrush = new SolidBrush(Color.Blue);
Pen bPen = new Pen(Color.Blue, e.Radius / 2f);
// Create the common size
SizeF BS = new SizeF(e.Radius * 2f, e.Radius * 2f);
// Does this knot have a previous?
if (m_Prev != null)
{
// Get the front point as a rectangle
RectangleF Fr = new RectangleF(GetPos(m_Front, c), BS);
Fr.X -= e.Radius;
Fr.Y -= e.Radius;
// Draw the front control point
g.FillRectangle(bBrush, Fr);
// Draw a line from front point to the knots point
g.DrawLine(bPen, GetPos(m_Front, c), GetPos(m_Point, c));
// Draw a line from the nexts after point to this knots front point
g.DrawLine(bPen, GetPos(Previous.After, c), GetPos(m_Front, c));
}
// Does this knot have a next?
if (m_Next != null)
{
// Get the after point as a rectangle
RectangleF Af = new RectangleF(GetPos(m_After, c), BS);
Af.X -= e.Radius;
Af.Y -= e.Radius;
// Draw the after control point
g.FillRectangle(bBrush, Af);
// Draw a line from the knots point to the after point
g.DrawLine(bPen, GetPos(m_Point, c), GetPos(m_After, c));
}
// Dispose of pens and brushes
bPen.Dispose();
bBrush.Dispose();
}
public void PaintTools(object sender, SplinePaintEventArgs e)
{
// Get sender as a spline tab
SplineTab tb = sender as SplineTab;
// Assure sender was a spline tab
if (tb == null)
{
throw new Exception("Sender for knots must be spline tab");
}
// Is bezier being drawn?
if (e.Bezier)
{
// Draw bezier tools
PaintTools_Bezier(tb.Camera, e);
}
else
{
// Draw hermite tools
PaintTools_Hermite(tb.Camera, e);
}
}
// Functions related to drawing
#region Paint Functions
public void PaintCurve(object sender, SplinePaintEventArgs e)
{
// Get sender as a spline tab
SplineTab tb = sender as SplineTab;
// Assure sender was a spline tab
if (tb == null)
{
throw new Exception("Sender for knots must be spline tab");
}
// Get the graphics from the event
Graphics g = e.PaintEvent.Graphics;
// Create a red brush
Brush rBrush = new SolidBrush(SelControl == SelectedControl.None ? Color.Red : e.Bezier ? Color.Blue : Color.Green);
// Get the camera as a vector
Vector2 cam = tb.Camera;
// Draw a circle to represent this knot
g.FillEllipse(rBrush, (m_Point.x - cam.x) - e.Radius, (-(m_Point.y - cam.y)) - e.Radius, e.Radius * 2f, e.Radius * 2f);
// Create a white pen
Pen wPen = new Pen(Color.White, e.Thickness);
// Is this knot not the last knot?
if (m_Next != null)
{
// Draw the curve
g.DrawBezier(wPen, GetPos(m_Point, cam), GetPos(m_After, cam), GetPos(Next.Before, cam), GetPos(Next.Position, cam));
}
// Dispose of pens and brushes
rBrush.Dispose();
wPen.Dispose();
}
