private static ObjFaceVertex ParseFaceVertex(string vertexString)
{
var fields = vertexString.Split(new[] { '/' }, StringSplitOptions.None);
var vertexIndex = StringConverter.ToInt(fields[0]);
var faceVertex = new ObjFaceVertex(vertexIndex, 0, 0);
if (fields.Length > 1)
{
var textureIndex = fields[1].Length == 0 ? 0 : StringConverter.ToInt(fields[1]);
faceVertex.TextureIndex = textureIndex;
}
if (fields.Length > 2)
{
var normalIndex = fields.Length > 2 && fields[2].Length == 0 ? 0 : StringConverter.ToInt(fields[2]);
faceVertex.NormalIndex = normalIndex;
}
return faceVertex;
}
public static void AppendObjTriangle(ObjItem objModel, ObjFaceVertex faceVertex,
ref List<float> vertexPositions, ref List<float> vertexNormals, ref List<float> vertexTextureCoordinates, ref List<float> vertexBoneWeights, ref List<float> vertexBoneIndices, ref List<uint> indeces)
{
if (indeces != null)
indeces.Add((uint)(vertexPositions.Count / 3));
if (vertexPositions != null)
{
var vertexPosition = objModel.Vertices[faceVertex.VertexIndex - 1];
vertexPositions.Add(vertexPosition.X);
vertexPositions.Add(vertexPosition.Y);
vertexPositions.Add(vertexPosition.Z);
}
if (vertexNormals != null)
{
if (objModel.Normals.Count == 0)
{
vertexNormals.AddRange(new[] { 0.0f, 0.0f, 0.0f });
}
else
{
var vertexNormal = objModel.Normals[faceVertex.NormalIndex - 1];
vertexNormals.Add(vertexNormal.X);
vertexNormals.Add(vertexNormal.Y);
vertexNormals.Add(vertexNormal.Z);
}
}
if (vertexTextureCoordinates != null)
{
var vertexTexture = objModel.TextureCoords[faceVertex.TextureIndex - 1];
vertexTextureCoordinates.Add(vertexTexture.X);
vertexTextureCoordinates.Add(vertexTexture.Y);
}
if (vertexBoneIndices != null)
vertexBoneIndices.AddRange(new[] { 0.0f, 0.0f, 0.0f, 0.0f });
if (vertexBoneWeights != null)
vertexBoneWeights.AddRange(new[] { 0.0f, 0.0f, 0.0f, 0.0f });
}
public void AddVertex(ObjFaceVertex vertex)
{
_vertices.Add(vertex);
}