private ObjVNFFace ParseFace(string[] parts)
{
ObjVNFFace result = null;
if (parts.Length == 4)// f 1 2 3
{
uint v0, v1, v2, n0, n1, n2, t0, t1, t2;
ParseFaceUnit(parts[1], out v0, out n0, out t0);
ParseFaceUnit(parts[2], out v1, out n1, out t1);
ParseFaceUnit(parts[3], out v2, out n2, out t2);
// index in obj files starts with 1.
result = new ObjVNFTriangle(v0 - 1, v1 - 1, v2 - 1, n0 - 1, n1 - 1, n2 - 1, t0 - 1, t1 - 1, t2 - 1);
}
else if (parts.Length == 5)// f 1 2 3 4
{
uint v0, v1, v2, v3, n0, n1, n2, n3, t0, t1, t2, t3;
ParseFaceUnit(parts[1], out v0, out n0, out t0);
ParseFaceUnit(parts[2], out v1, out n1, out t1);
ParseFaceUnit(parts[3], out v2, out n2, out t2);
ParseFaceUnit(parts[4], out v3, out n3, out t3);
// index in obj files starts with 1.
result = new ObjVNFQuad(v0 - 1, v1 - 1, v2 - 1, v3 - 1, n0 - 1, n1 - 1, n2 - 1, n3 - 1, t0 - 1, t1 - 1, t2 - 1, t3 - 1);
}
else
{
throw new Exception(string.Format("unexpected line parts[{0}]", parts.Length));
}
return(result);
}
/// <summary>
/// Reads mesh's vertex count, normal count and face count.
/// </summary>
/// <param name="context"></param>
public override void Parse(ObjVNFContext context)
{
int triangleFaceCount = 0;
ObjVNFMesh mesh = context.Mesh;
for (int i = 0; i < context.faceCount; i++)
{
ObjVNFFace face = mesh.faces[i];
uint[] normalIndexes = (from item in face.NormalIndexes() select item).ToArray();
uint[] vertexIndexes = (from item in face.VertexIndexes() select item).ToArray();
if (normalIndexes.Length != vertexIndexes.Length)
{
throw new Exception(string.Format(
"normalIndexes.Length [{0}] != vertexIndexes.Length [{0}]!",
normalIndexes.Length, vertexIndexes.Length));
}
if (face is ObjVNFTriangle)
{
triangleFaceCount++;
}
else if (face is ObjVNFQuad)
{
triangleFaceCount += 2;
}
}
if (triangleFaceCount != context.faceCount)
{
var faces = new ObjVNFTriangle[triangleFaceCount];
for (int i = 0, j = 0; i < context.faceCount; i++)
{
ObjVNFFace face = mesh.faces[i];
if (face is ObjVNFTriangle)
{
faces[j++] = face as ObjVNFTriangle;
}
else if (face is ObjVNFQuad)
{
var quad = face as ObjVNFQuad;
faces[j++] = new ObjVNFTriangle(
quad.vertexIndexes[0], quad.vertexIndexes[1], quad.vertexIndexes[2],
quad.normalIndexes[0], quad.normalIndexes[1], quad.normalIndexes[2],
quad.texCoordIndexes[0], quad.texCoordIndexes[1], quad.texCoordIndexes[2]);
faces[j++] = new ObjVNFTriangle(
quad.vertexIndexes[0], quad.vertexIndexes[2], quad.vertexIndexes[3],
quad.normalIndexes[0], quad.normalIndexes[2], quad.normalIndexes[3],
quad.texCoordIndexes[0], quad.texCoordIndexes[2], quad.texCoordIndexes[3]);
}
}
mesh.faces = faces;
context.faceCount = triangleFaceCount;
}
}
/// <summary>
/// Reads mesh's vertex count, normal count and face count.
/// </summary>
/// <param name="context"></param>
public override void Parse(ObjVNFContext context) {
int triangleFaceCount = 0;
ObjVNFMesh mesh = context.Mesh;
for (int i = 0; i < context.faceCount; i++) {
ObjVNFFace face = mesh.faces[i];
uint[] vertexIndexes = face.VertexIndexes();
if (face is ObjVNFTriangle) {
triangleFaceCount++;
}
else if (face is ObjVNFQuad) {
triangleFaceCount += 2;
}
}
if (triangleFaceCount != context.faceCount) {
var faces = new ObjVNFTriangle[triangleFaceCount];
for (int i = 0, j = 0; i < context.faceCount; i++) {
ObjVNFFace face = mesh.faces[i];
if (face is ObjVNFTriangle) {
faces[j++] = face as ObjVNFTriangle;
}
else if (face is ObjVNFQuad) {
var quad = face as ObjVNFQuad;
faces[j++] = new ObjVNFTriangle(
quad.vertexIndexes[0], quad.vertexIndexes[1], quad.vertexIndexes[2],
quad.normalIndexes[0], quad.normalIndexes[1], quad.normalIndexes[2],
quad.texCoordIndexes[0], quad.texCoordIndexes[1], quad.texCoordIndexes[2]);
faces[j++] = new ObjVNFTriangle(
quad.vertexIndexes[0], quad.vertexIndexes[2], quad.vertexIndexes[3],
quad.normalIndexes[0], quad.normalIndexes[2], quad.normalIndexes[3],
quad.texCoordIndexes[0], quad.texCoordIndexes[2], quad.texCoordIndexes[3]);
}
}
mesh.faces = faces;
context.faceCount = triangleFaceCount;
}
}
