/// <summary>
/// Write a new colour definition to the
/// material library.
/// Revit transparency lies between 0 and 100,
/// where 100 is completely transparent and 0
/// opaque. In MTL, the transparency is written
/// using either a 'd' or a 'Tr' statement with
/// values ranging from 0.0 to 1.0, where 1.0 is
/// opaque.
/// </summary>
static void EmitColorTransparency(
StreamWriter s,
int trgb)
{
// 透明度
int transparency;
Color color = ObjExportUtil.IntToColorTransparency(
trgb, out transparency);
string name = ObjExportUtil.ColorTransparencyString(
color, transparency);
if (_more_transparent && 0 < transparency)
{
transparency = 100;
}
s.WriteLine(_mtl_newmtl_d,
name,
color.Red / 255.0,
color.Green / 255.0,
color.Blue / 255.0,
(100 - transparency) / 100.0);
}
/// <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);
}
