public void OnPolymesh(PolymeshTopology polymesh)
{
IList <XYZ> pts = polymesh.GetPoints();
Transform t = CurrentTransform;
pts = pts.Select(p => t.OfPoint(p)).ToList();
var normals = polymesh.GetNormals();
var uvs = polymesh.GetUVs();
int v1, v2, v3;
int v4, v5, v6;
int v7, v8, v9;
int faceindex = 0;
foreach (PolymeshFacet facet in polymesh.GetFacets())
{
v1 = _vertices.AddVertex(new PointInt(pts[facet.V1], _switch_coordinates));
v2 = _vertices.AddVertex(new PointInt(pts[facet.V2], _switch_coordinates));
v3 = _vertices.AddVertex(new PointInt(pts[facet.V3], _switch_coordinates));
face.Add(v1);
face.Add(v2);
face.Add(v3);
v4 = _uvs.AddVertex(new PointDouble(uvs[facet.V1]));
v5 = _uvs.AddVertex(new PointDouble(uvs[facet.V2]));
v6 = _uvs.AddVertex(new PointDouble(uvs[facet.V3]));
face.Add(v4);
face.Add(v5);
face.Add(v6);
if (polymesh.DistributionOfNormals == DistributionOfNormals.AtEachPoint)
{
v7 = _normals.AddVertex(new PointDouble(normals[facet.V1], _switch_coordinates));
v8 = _normals.AddVertex(new PointDouble(normals[facet.V2], _switch_coordinates));
v9 = _normals.AddVertex(new PointDouble(normals[facet.V3], _switch_coordinates));
}
else if (polymesh.DistributionOfNormals == DistributionOfNormals.OnEachFacet)
{
v7 = _normals.AddVertex(new PointDouble(normals[faceindex], _switch_coordinates));
v8 = v7;
v9 = v7;
}
else
{
v7 = _normals.AddVertex(new PointDouble(normals[0], _switch_coordinates));
v8 = v7;
v9 = v7;
}
face.Add(v7);
face.Add(v8);
face.Add(v9);
faceindex++;
}
}
/// <summary>
/// 获取几何信息中每个三角面对应点的顶点坐标/法向坐标/UV坐标的索引
/// 并存入face列表中
/// </summary>
/// <param name="polymesh"></param>
/// <param name="pts"></param>
/// <param name="normals"></param>
/// <param name="uvs"></param>
private void GetFaceIndex(PolymeshTopology polymesh, IList <XYZ> pts, IList <XYZ> normals, IList <UV> uvs)
{
int v1, v2, v3;
int v4, v5, v6;
int v7, v8, v9;
int faceindex = 0;
foreach (PolymeshFacet facet in polymesh.GetFacets())
{
v1 = _vertices.AddVertex(new PointInt(pts[facet.V1], _switch_coordinates));
v2 = _vertices.AddVertex(new PointInt(pts[facet.V2], _switch_coordinates));
v3 = _vertices.AddVertex(new PointInt(pts[facet.V3], _switch_coordinates));
face.Add(v1);
face.Add(v2);
face.Add(v3);
v4 = _uvs.AddVertex(new PointDouble(uvs[facet.V1]));
v5 = _uvs.AddVertex(new PointDouble(uvs[facet.V2]));
v6 = _uvs.AddVertex(new PointDouble(uvs[facet.V3]));
face.Add(v4);
face.Add(v5);
face.Add(v6);
if (polymesh.DistributionOfNormals == DistributionOfNormals.AtEachPoint)
{
v7 = _normals.AddVertex(new PointDouble(normals[facet.V1], _switch_coordinates));
v8 = _normals.AddVertex(new PointDouble(normals[facet.V2], _switch_coordinates));
v9 = _normals.AddVertex(new PointDouble(normals[facet.V3], _switch_coordinates));
}
else if (polymesh.DistributionOfNormals == DistributionOfNormals.OnEachFacet)
{
v7 = _normals.AddVertex(new PointDouble(normals[faceindex], _switch_coordinates));
v8 = v7;
v9 = v7;
}
else
{
v7 = _normals.AddVertex(new PointDouble(normals[0], _switch_coordinates));
v8 = v7;
v9 = v7;
}
face.Add(v7);
face.Add(v8);
face.Add(v9);
faceindex++;
}
}
/// <summary>
/// Add the vertices of the given triangle to our
/// vertex lookup dictionary and emit a triangle.
/// </summary>
void StoreTriangle(MeshTriangle triangle)
{
for (int i = 0; i < 3; ++i)
{
XYZ p = triangle.get_Vertex(i);
PointInt q = new PointInt(p);
_triangles.Add(_vertices.AddVertex(q));
}
}
