/// <summary>
/// 将给定三角形的顶点添加到顶点查找字典并发出三角形。
/// Add the vertices of the given triangle to our
/// vertex lookup dictionary and emit a triangle.
/// </summary>
void StoreTriangle(MeshTriangle triangle, ObjModel objModel)
{
var vFace = new VFace();
for (int i = 0; i < 3; ++i)
{
XYZ p = triangle.get_Vertex(i);
if (i == 0)
{
vFace.Point1 = _vertices.AddVertex(new PointInt(p)) + 1;
}
else if (i == 1)
{
vFace.Point2 = _vertices.AddVertex(new PointInt(p)) + 1;
}
else if (i == 2)
{
vFace.Point3 = _vertices.AddVertex(new PointInt(p)) + 1;
}
}
// 添加面数据
objModel.Faces.Add(vFace);
}
/// <summary>
/// Emit a Revit geometry Face object and
/// return the number of resulting triangles.
/// </summary>
public int EmitFace(Element e, Face face, Color color, int transparency)
{
++_faceCount;
var objModel = new ObjModel()
{
UniqueId = e.UniqueId,
Faces = new List <VFace>(),
vt = new List <object>()
};
_objModels.Add(objModel);
// 保存每个实体的材质颜色
if (_add_color && _color_transparency_lookup.AddColorTransparency(color, transparency))
{
// 设置材质颜色id
string name = ObjExportUtil.ColorTransparencyString(color, transparency);
objModel.Mtl = name;
}
Mesh mesh = face.Triangulate(0 / 15.0);
//Mesh mesh = face.Triangulate();
#region 保存 Vertex 及 Triangle 数据
int numTriangles = mesh.NumTriangles;
for (int i = 0; i < numTriangles; ++i)
{
++_triangleCount;
MeshTriangle meshTriangle = mesh.get_Triangle(i);
StoreTriangle(meshTriangle, objModel);
}
#endregion
return(numTriangles);
}