public static CrossSectionSolid CreateConstantCrossSectionSolid(double[] buildDirection, double extrudeDistance, List <Vertex> layer3DAtStart,
double sameTolerance, UnitType units)
{
//Since the start point may be along a negative direction, we have to add vectors instead of adding the extrudeDistance as is.
var start = layer3DAtStart.First().Position.dotProduct(buildDirection);
var endPoint = layer3DAtStart.First().Position.add(buildDirection.multiply(extrudeDistance));
var stepDistances = new Dictionary <int, double> {
{ 0, start }, { 1, endPoint.dotProduct(buildDirection) }
};
var shape = new PolygonLight(MiscFunctions.Get2DProjectionPointsAsLight(layer3DAtStart, buildDirection));
if (shape.Area < 0)
{
shape = PolygonLight.Reverse(shape);
}
var layers2D = new Dictionary <int, List <PolygonLight> > {
{ 0, new List <PolygonLight> {
shape
} }, { 1, new List <PolygonLight> {
shape
} }
};
return(new CrossSectionSolid(buildDirection, stepDistances, sameTolerance, layers2D, null, units));
}
private static PolygonLight GetPolygonFromFace(PolygonalFace face, Dictionary <int, PointLight> projectedPoints, bool forceToBePositive)
{
if (face.Vertices.Count != 3)
{
throw new Exception("This method was only developed with triangles in mind.");
}
//Make sure the polygon is ordered correctly (we already know this face is positive)
var points = face.Vertices.Select(v => projectedPoints[v.IndexInList]).ToList();
var facePolygon = new PolygonLight(points);
if (forceToBePositive && facePolygon.Area < 0)
{
facePolygon = PolygonLight.Reverse(facePolygon);
}
return(facePolygon);
}