public static ICollection <Graphic> GetGraphics(IDesignFace iDesignFace, PointUV pointUV, double span, double position, HandleTypeEnum handleType)
{
Debug.Assert(iDesignFace != null);
Window activeWindow = Window.ActiveWindow;
var graphics = new List <Graphic>();
var primitives = new List <Primitive>();
SurfaceEvaluation eval = iDesignFace.Shape.Geometry.Evaluate(pointUV);
Point point = eval.Point;
Direction normal = eval.Normal;
double pixelSize = activeWindow.ActiveContext.GetPixelSize(point);
double shaftDiameter = 4 * pixelSize;
double handleDiameter = 8 * pixelSize;
double handleHeight = 4 * pixelSize;
Point startPoint = point - (normal * (span * (position + 1) / 2 - handleHeight));
Point endPoint = startPoint + normal * (span + 2 * handleHeight);
Vector handleHalfThickness = normal * handleHeight / 2;
bool isDrawingAll = handleType == HandleTypeEnum.All;
var mesh = new List <Primitive>();
var style = new GraphicStyle
{
EnableDepthBuffer = true,
LineColor = Color.DimGray,
LineWidth = 1,
FillColor = Color.DimGray
};
switch (handleType)
{
case HandleTypeEnum.All:
case HandleTypeEnum.Shaft:
mesh.AddRange(ShapeHelper.CreateCylinderMesh(startPoint, endPoint, shaftDiameter, 8));
graphics.Add(Graphic.Create(style, mesh));
if (isDrawingAll)
{
goto case HandleTypeEnum.Base;
}
else
{
break;
}
case HandleTypeEnum.Base:
mesh.AddRange(ShapeHelper.CreateCylinderMesh(point - handleHalfThickness, point + handleHalfThickness, handleDiameter, 12));
style.LineColor = Color.DodgerBlue;
style.FillColor = Color.DodgerBlue;
graphics.Add(Graphic.Create(style, mesh));
if (isDrawingAll)
{
goto case HandleTypeEnum.Start;
}
else
{
break;
}
case HandleTypeEnum.Start:
mesh.AddRange(ShapeHelper.CreateCylinderMesh(startPoint - handleHalfThickness, startPoint + handleHalfThickness, handleDiameter, 12));
style.LineColor = Color.DarkViolet;
style.FillColor = Color.DarkViolet;
graphics.Add(Graphic.Create(style, mesh));
if (isDrawingAll)
{
goto case HandleTypeEnum.End;
}
else
{
break;
}
case HandleTypeEnum.End:
mesh.AddRange(ShapeHelper.CreateCylinderMesh(endPoint - handleHalfThickness, endPoint + handleHalfThickness, handleDiameter, 12));
style.LineColor = Color.DarkViolet;
style.FillColor = Color.DarkViolet;
graphics.Add(Graphic.Create(style, mesh));
break;
}
return(graphics);
}