public static SimpleMesh UnityMeshToSimpleMesh(UnityEngine.Mesh mesh, bool bSwapLeftright)
{
SimpleMesh smesh = new SimpleMesh();
Vector3[] vertices = mesh.vertices;
Vector3[] normals = mesh.normals;
Color32[] colors32 = mesh.colors32;
Color[] colors = mesh.colors;
Vector2[] uv = mesh.uv;
bool bNormals = (normals.Length == mesh.vertexCount);
bool bColors = (colors.Length == mesh.vertexCount || colors32.Length == mesh.vertexCount);
bool bByteColors = (colors32.Length == mesh.vertexCount);
bool bUVs = (uv.Length == mesh.vertexCount);
smesh.Initialize(bNormals, bColors, bUVs, false);
for (int i = 0; i < mesh.vertexCount; ++i)
{
Vector3d v = vertices[i];
if (bSwapLeftright)
{
v.x = -v.x;
v.z = -v.z;
}
NewVertexInfo vInfo = new NewVertexInfo(v);
if (bNormals)
{
vInfo.bHaveN = true;
vInfo.n = normals[i];
if (bSwapLeftright)
{
vInfo.n.x = -vInfo.n.x;
vInfo.n.z = -vInfo.n.z;
}
}
if (bColors)
{
vInfo.bHaveC = true;
if (bByteColors)
{
vInfo.c = new Colorf(colors32[i].r, colors32[i].g, colors32[i].b, 255);
}
else
{
vInfo.c = colors[i];
}
}
if (bUVs)
{
vInfo.bHaveUV = true;
vInfo.uv = uv[i];
}
int vid = smesh.AppendVertex(vInfo);
if (vid != i)
{
throw new InvalidOperationException("UnityUtil.UnityMeshToSimpleMesh: indices weirdness...");
}
}
int[] triangles = mesh.triangles;
for (int i = 0; i < triangles.Length / 3; ++i)
{
smesh.AppendTriangle(triangles[3 * i], triangles[3 * i + 1], triangles[3 * i + 2]);
}
return(smesh);
}
/// <summary>
/// If go has a MeshFilter, extract it and append to SimpleMesh.
/// Returns false if no filter.
/// </summary>
bool AppendGOMesh(GameObject go, SimpleMesh m, int[] vertexMap, FScene scene, int gid)
{
MeshFilter filter = go.GetComponent <MeshFilter>();
if (filter == null || filter.mesh == null)
{
return(false);
}
Mesh curMesh = filter.sharedMesh;
Vector3[] vertices = curMesh.vertices;
Vector3[] normals = (WriteNormals) ? curMesh.normals : null;
Color[] colors = (WriteVertexColors) ? curMesh.colors : null;
Vector2[] uvs = (WriteUVs) ? curMesh.uv : null;
if (vertexMap.Length < curMesh.vertexCount)
{
vertexMap = new int[curMesh.vertexCount * 2];
}
for (int i = 0; i < curMesh.vertexCount; ++i)
{
NewVertexInfo vi = new NewVertexInfo();
vi.bHaveN = WriteNormals; vi.bHaveC = WriteVertexColors; vi.bHaveUV = WriteUVs;
Vector3f v = vertices[i];
// local to world
v = filter.gameObject.transform.TransformPoint(v);
// world back to scene
v = scene.ToSceneP(v);
vi.v = UnityUtil.SwapLeftRight(v);
if (WriteNormals)
{
Vector3 n = normals[i];
n = filter.gameObject.transform.TransformDirection(n); // to world
n = scene.ToSceneN(n); // to scene
vi.n = UnityUtil.SwapLeftRight(n);
}
if (WriteVertexColors)
{
vi.c = colors[i];
}
if (WriteUVs)
{
vi.uv = uvs[i];
}
vertexMap[i] = m.AppendVertex(vi);
}
int[] triangles = curMesh.triangles;
int nTriangles = triangles.Length / 3;
for (int i = 0; i < nTriangles; ++i)
{
int a = vertexMap[triangles[3 * i]];
int b = vertexMap[triangles[3 * i + 1]];
int c = vertexMap[triangles[3 * i + 2]];
m.AppendTriangle(a, c, b, gid); // TRI ORIENTATION IS REVERSED HERE!!
}
return(true);
}
public ExportStatus Export(FScene s, string filename)
{
List <WriteMesh> vMeshes = new List <WriteMesh>();
if (WriteFaceGroups)
{
throw new Exception("SceneMeshExporter.Export: writing face groups has not yet been implemented!");
}
foreach (SceneObject so in s.SceneObjects)
{
if (so.IsTemporary)
{
continue;
}
SimpleMesh m = new SimpleMesh();
m.Initialize(WriteNormals, WriteVertexColors, WriteUVs, WriteFaceGroups);
int groupCounter = 1;
GameObject rootgo = so.RootGameObject;
int[] vertexMap = new int[2048];
foreach (GameObject childgo in rootgo.Children())
{
MeshFilter filter = childgo.GetComponent <MeshFilter>();
if (filter == null || filter.mesh == null)
{
continue;
}
if (GOFilterF != null && GOFilterF(so, childgo) == false)
{
continue;
}
Mesh curMesh = filter.sharedMesh;
Vector3[] vertices = curMesh.vertices;
Vector3[] normals = (WriteNormals) ? curMesh.normals : null;
Color[] colors = (WriteVertexColors) ? curMesh.colors : null;
Vector2[] uvs = (WriteUVs) ? curMesh.uv : null;
if (vertexMap.Length < curMesh.vertexCount)
{
vertexMap = new int[curMesh.vertexCount * 2];
}
for (int i = 0; i < curMesh.vertexCount; ++i)
{
NewVertexInfo vi = new NewVertexInfo();
vi.bHaveN = WriteNormals; vi.bHaveC = WriteVertexColors; vi.bHaveUV = WriteUVs;
Vector3 v = vertices[i];
// local to world
v = filter.gameObject.transform.TransformPoint(v);
// world back to scene
vi.v = UnityUtil.SwapLeftRight(s.RootGameObject.transform.InverseTransformPoint(v));
if (WriteNormals)
{
Vector3 n = normals[i];
n = filter.gameObject.transform.TransformDirection(n);
vi.n = UnityUtil.SwapLeftRight(s.RootGameObject.transform.InverseTransformDirection(n));
}
if (WriteVertexColors)
{
vi.c = colors[i];
}
if (WriteUVs)
{
vi.uv = uvs[i];
}
vertexMap[i] = m.AppendVertex(vi);
}
int[] triangles = curMesh.triangles;
int nTriangles = triangles.Length / 3;
for (int i = 0; i < nTriangles; ++i)
{
int a = vertexMap[triangles[3 * i]];
int b = vertexMap[triangles[3 * i + 1]];
int c = vertexMap[triangles[3 * i + 2]];
m.AppendTriangle(a, c, b, groupCounter); // TRI ORIENTATION IS REVERSED HERE!!
}
groupCounter++;
}
vMeshes.Add(new WriteMesh(m, so.Name));
}
if (WriteInBackgroundThreads)
{
ExportStatus status = new ExportStatus()
{
Exporter = this, IsComputing = true
};
WriteOptions useOptions = Options;
useOptions.ProgressFunc = (cur, max) => {
status.Progress = cur;
status.MaxProgress = max;
};
BackgroundWriteThread t = new BackgroundWriteThread()
{
Meshes = vMeshes, options = useOptions, Filename = filename,
CompletionF = (result) => {
LastWriteStatus = result.code;
LastErrorMessage = result.message;
status.LastErrorMessage = result.message;
status.Ok = (result.code == IOCode.Ok);
status.IsComputing = false;
}
};
t.Start();
return(status);
}
else
{
IOWriteResult result = StandardMeshWriter.WriteFile(filename, vMeshes, Options);
LastWriteStatus = result.code;
LastErrorMessage = result.message;
return(new ExportStatus()
{
Exporter = this, IsComputing = false,
Ok = (result.code == IOCode.Ok),
LastErrorMessage = result.message
});
}
}