public bool L_C_LineInCircle(G_Line L1, G_Cricle C1)
{
bool isStartPtInCircle = false;
bool isEndPtInCircle = false;
double dist;
dist = Math.Sqrt(Math.Pow(C1.pCenter.X - L1.startPt.X, 2) + Math.Pow(C1.pCenter.Y - L1.startPt.Y, 2));
if (dist < C1.radius)
{
isStartPtInCircle = true;
}
dist = Math.Sqrt(Math.Pow(C1.pCenter.X - L1.endPt.X, 2) + Math.Pow(C1.pCenter.Y - L1.endPt.Y, 2));
if (dist < C1.radius)
{
isEndPtInCircle = true;
}
if (isStartPtInCircle && isEndPtInCircle)
{
return(true);
}
return(false);
}
public bool L_C_Intesect(G_Line L1, G_Cricle C1)
{
bool isStartPtInCircle = false;
bool isEndPtInCircle = false;
double dist;
dist = Math.Sqrt(Math.Pow(C1.pCenter.X - L1.startPt.X, 2) + Math.Pow(C1.pCenter.Y - L1.startPt.Y, 2));
if (dist < C1.radius)
{
isStartPtInCircle = true;
}
dist = Math.Sqrt(Math.Pow(C1.pCenter.X - L1.endPt.X, 2) + Math.Pow(C1.pCenter.Y - L1.endPt.Y, 2));
if (dist < C1.radius)
{
isEndPtInCircle = true;
}
if (isStartPtInCircle && !isEndPtInCircle)
{
return(true);
}
if (!isStartPtInCircle && isEndPtInCircle)
{
return(true);
}
//穿过circle的情况
if (!isEndPtInCircle && !isStartPtInCircle)
{
dist = System.Math.Sqrt(System.Math.Abs(L1.k * C1.pCenter.X - C1.pCenter.Y + L1.b) / (System.Math.Pow(L1.k, 2) + 1));
if (dist < C1.radius)
{
return(true);
}
}
return(false);
}
public void refreshConstraint(StrokeGroup sg)
{
bool isL_L_Vertical = false;
bool isL_L_Intersect = false;
bool isL_L_Parallel = false;
bool isL_C_Tangent = false;
bool isL_C_Intersect = false;
bool isL_C_LineInCircle = false;
//TODO::加入更多的约束关系
if (sg.GRAPH == Graphic.Line)
{
G_Line geo1 = (G_Line)sg.geometry;
foreach (SKContextDGNode nd in sketch.sketchContextDG.DGNodeList)
{
Graphic type = nd.strokeGroup.GRAPH;
switch (type)
{
case Graphic.Line: //L_L
G_Line geo2 = (G_Line)nd.strokeGroup.geometry;
if (geo2 != null)
{
isL_L_Vertical = new G_L_L_Constraints().L_L_Vertical(geo1, geo2);
isL_L_Intersect = new G_L_L_Constraints().L_L_Intersect(geo1, geo2);
isL_L_Parallel = new G_L_L_Constraints().L_L_Parallel(geo1, geo2);
//保存约束
ConstraintElement elem = new ConstraintElement();
elem.strokeGroup1 = sg;
elem.strokeGroup2 = nd.strokeGroup;
if (isL_L_Intersect)
{
elem.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Intersecting");
}
if (isL_L_Parallel)
{
elem.ctype = ConstraintType.Parallel;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Parallel");
}
if (isL_L_Vertical)
{
elem.ctype = ConstraintType.Vertical;
sketch.m_pConsList.Add(elem);
// MessageBox.Show("Vertical");
}
}
break;
case Graphic.Circle: //L_C
G_Cricle geo3 = (G_Cricle)nd.strokeGroup.geometry;
if (geo3 != null)
{
isL_C_Tangent = new G_L_C_Constraints().L_C_Tangent();
isL_C_Intersect = new G_L_C_Constraints().L_C_Intesect(geo1, geo3);
isL_C_LineInCircle = new G_L_C_Constraints().L_C_LineInCircle(geo1, geo3);
//保存约束
ConstraintElement elem1 = new ConstraintElement();
elem1.strokeGroup1 = sg;
elem1.strokeGroup2 = nd.strokeGroup;
if (isL_C_Tangent)
{
elem1.ctype = ConstraintType.Tangent;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Intersecting");
}
if (isL_C_Intersect)
{
elem1.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Parallel");
}
if (isL_C_LineInCircle)
{
elem1.ctype = ConstraintType.In;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Vertical");
}
}
break;
default:
break;
}
}
}
else
if (sg.GRAPH == Graphic.Circle) //Circle
{
G_Cricle geo4 = (G_Cricle)sg.geometry;
foreach (SKContextDGNode nd in sketch.sketchContextDG.DGNodeList)
{
Graphic type = nd.strokeGroup.GRAPH;
switch (type)
{
case Graphic.Line: //L_C
G_Line geo5 = (G_Line)nd.strokeGroup.geometry;
if (geo5 != null)
{
isL_C_Tangent = new G_L_C_Constraints().L_C_Tangent();
isL_C_Intersect = new G_L_C_Constraints().L_C_Intesect(geo5, geo4);
isL_C_LineInCircle = new G_L_C_Constraints().L_C_LineInCircle(geo5, geo4);
//保存约束
ConstraintElement elem1 = new ConstraintElement();
elem1.strokeGroup1 = sg;
elem1.strokeGroup2 = nd.strokeGroup;
if (isL_C_Tangent)
{
elem1.ctype = ConstraintType.Tangent;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Intersecting");
}
if (isL_C_Intersect)
{
elem1.ctype = ConstraintType.Intersect;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Parallel");
}
if (isL_C_LineInCircle)
{
elem1.ctype = ConstraintType.In;
sketch.m_pConsList.Add(elem1);
// MessageBox.Show("Vertical");
}
}
break;
case Graphic.Circle: //C_C
break;
default:
break;
}
}
}
}