//---------------------------------PRIVATES-------------------------------------//
/**
* Sets an end as vertex (starting point if none end were defined, ending point otherwise)
*
* @param vertex the vertex that is an segment end
* @return false if all the ends were already defined, true otherwise
*/
private bool SetVertex(Vertex vertex)
{
//none end were defined - define starting point as VERTEX
if (index == 0)
{
startVertex = vertex;
startType = VERTEX;
StartDist = line.ComputePointToPointDistance(vertex.GetPosition());
startPos = startVertex.GetPosition();
index++;
return(true);
}
//starting point were defined - define ending point as VERTEX
if (index == 1)
{
endVertex = vertex;
endType = VERTEX;
endDist = line.ComputePointToPointDistance(vertex.GetPosition());
endPos = endVertex.GetPosition();
index++;
//defining middle based on the starting point
//VERTEX-VERTEX-VERTEX
if (startVertex.Equals(endVertex))
{
middleType = VERTEX;
}
//VERTEX-EDGE-VERTEX
else if (startType == VERTEX)
{
middleType = EDGE;
}
//the ending point distance should be smaller than starting point distance
if (StartDist > endDist)
{
SwapEnds();
}
return(true);
}
else
{
return(false);
}
}
public double GetArea()
{
//area = (a * c * sen(B))/2
Vector3 p1 = v1.GetPosition();
Vector3 p2 = v2.GetPosition();
Vector3 p3 = v3.GetPosition();
Vector3 xy = new Vector3(p2.x - p1.x, p2.y - p1.y, p2.z - p1.z);
Vector3 xz = new Vector3(p3.x - p1.x, p3.y - p1.y, p3.z - p1.z);
double a = (p1 - p2).Length;
double c = (p1 - p3).Length;
double B = Vector3.CalculateAngle(xy, xz);
return((a * c * Math.Sin(B)) / 2d);
}
/**
* Sets an end as edge (starting point if none end were defined, ending point otherwise)
*
* @param vertex1 one of the vertices of the intercepted edge
* @param vertex2 one of the vertices of the intercepted edge
* @return false if all ends were already defined, true otherwise
*/
private bool SetEdge(Vertex vertex1, Vertex vertex2)
{
Vector3 point1 = vertex1.GetPosition();
Vector3 point2 = vertex2.GetPosition();
Vector3 edgeDirection = new Vector3(point2.x - point1.x, point2.y - point1.y, point2.z - point1.z);
Line edgeLine = new Line(edgeDirection, point1);
if (index == 0)
{
startVertex = vertex1;
startType = EDGE;
startPos = line.ComputeLineIntersection(edgeLine);
StartDist = line.ComputePointToPointDistance(startPos);
middleType = FACE;
index++;
return(true);
}
else if (index == 1)
{
endVertex = vertex1;
endType = EDGE;
endPos = line.ComputeLineIntersection(edgeLine);
endDist = line.ComputePointToPointDistance(endPos);
middleType = FACE;
index++;
//the ending point distance should be smaller than starting point distance
if (StartDist > endDist)
{
SwapEnds();
}
return(true);
}
else
{
return(false);
}
}
