private static BodyTessellation GetBodyMesh(IBody2 body, IPartDoc partDoc, ITessellation tessellation, long?overrideColor)
{
var bodyTessellation = new BodyTessellation();
if (overrideColor.HasValue)
{
bodyTessellation.FaceColors.Add(overrideColor.Value);
}
else
{
double[] bodyColorArray = null;
var features = (object[])body.GetFeatures();
if (features != null)
{
foreach (IFeature feature in features.Reverse())
{
bodyColorArray =
(double[])feature.GetMaterialPropertyValues2(
(int)swInConfigurationOpts_e.swThisConfiguration, null);
if (bodyColorArray[0] == -1
) // All -1s are returned by features that don't assign color.
{
bodyColorArray = null;
}
if (bodyColorArray != null)
{
break;
}
}
}
if (bodyColorArray == null)
{
bodyColorArray = (double[])body.MaterialPropertyValues2;
}
if (bodyColorArray == null)
{
bodyColorArray = (double[])partDoc.MaterialPropertyValues;
}
var bodyColor = ColorArrayToColor(bodyColorArray);
bodyTessellation.FaceColors.Add(bodyColor);
}
var coloredFaces = new Dictionary <IFace2, long>();
var faceCount = 0;
foreach (IFace2 face in (object[])body.GetFaces())
{
faceCount++;
var colorArray = (double[])face.MaterialPropertyValues;
if (colorArray != null)
{
coloredFaces[face] = ColorArrayToColor(colorArray);
}
}
if (coloredFaces.Count < faceCount)
{
for (var i = 0; i < tessellation.GetVertexCount(); i++)
{
bodyTessellation.VertexPositions.Add((double[])tessellation.GetVertexPoint(i));
bodyTessellation.VertexNormals.Add((double[])tessellation.GetVertexNormal(i));
}
foreach (IFace2 face in (object[])body.GetFaces())
{
if (coloredFaces.ContainsKey(face))
{
continue;
}
foreach (var facet in (int[])tessellation.GetFaceFacets(face))
{
var vertexIndices = new List <int>();
foreach (var fin in (int[])tessellation.GetFacetFins(facet))
{
vertexIndices.Add(((int[])tessellation.GetFinVertices(fin))[0]);
}
bodyTessellation.Faces.Add(new FaceStruct {
Color = 0,
Vertex1 = vertexIndices[0],
Vertex2 = vertexIndices[1],
Vertex3 = vertexIndices[2],
});
}
}
}
foreach (var pair in coloredFaces)
{
var colorIndex = bodyTessellation.FaceColors.IndexOf(pair.Value);
if (colorIndex == -1)
{
bodyTessellation.FaceColors.Add(pair.Value);
colorIndex = bodyTessellation.FaceColors.Count - 1;
}
foreach (var facet in (int[])tessellation.GetFaceFacets(pair.Key))
{
var vertexIndices = new List <int>();
foreach (var fin in (int[])tessellation.GetFacetFins(facet))
{
vertexIndices.Add(((int[])tessellation.GetFinVertices(fin))[0]);
}
bodyTessellation.Faces.Add(
new FaceStruct {
Color = colorIndex,
Vertex1 = bodyTessellation.VertexPositions.Count,
Vertex2 = bodyTessellation.VertexPositions.Count + 1,
Vertex3 = bodyTessellation.VertexPositions.Count + 2
});
bodyTessellation.VertexPositions.Add(
(double[])tessellation.GetVertexPoint(vertexIndices[0]));
bodyTessellation.VertexPositions.Add(
(double[])tessellation.GetVertexPoint(vertexIndices[1]));
bodyTessellation.VertexPositions.Add(
(double[])tessellation.GetVertexPoint(vertexIndices[2]));
bodyTessellation.VertexNormals.Add(
(double[])tessellation.GetVertexNormal(vertexIndices[0]));
bodyTessellation.VertexNormals.Add(
(double[])tessellation.GetVertexNormal(vertexIndices[1]));
bodyTessellation.VertexNormals.Add(
(double[])tessellation.GetVertexNormal(vertexIndices[2]));
}
}
return(bodyTessellation);
}