public GameObject ImportGeo(string filename, Vtf vtf, GameObject prefab, int textureGroup)
{
GeoMeshCacheEntry meshCacheEntry = ImportMesh(filename, vtf, textureGroup);
GameObject obj = Object.Instantiate(prefab);
obj.SetActive(false);
obj.gameObject.name = meshCacheEntry.GeoMesh.Name;
MeshFilter meshFilter = obj.GetComponent <MeshFilter>();
if (meshFilter != null)
{
meshFilter.sharedMesh = meshCacheEntry.Mesh;
obj.GetComponent <MeshRenderer>().materials = meshCacheEntry.Materials;
}
MeshCollider collider = obj.GetComponent <MeshCollider>();
if (collider != null)
{
collider.sharedMesh = meshCacheEntry.Mesh;
}
return(obj.gameObject);
}
public GeoMeshCacheEntry ImportMesh(string filename, Vtf vtf, int textureGroup)
{
if (MeshCache.TryGetValue(filename, out GeoMeshCacheEntry cacheEntry))
{
return(cacheEntry);
}
GeoMesh geoMesh = GeoParser.ReadGeoMesh(filename);
Mesh mesh = new Mesh();
List <Vector3> vertices = new List <Vector3>();
List <Vector2> uvs = new List <Vector2>();
List <Vector3> normals = new List <Vector3>();
Dictionary <Material, List <GeoFace> > facesGroupedByMaterial = new Dictionary <Material, List <GeoFace> >();
GeoFace[] faces = geoMesh.Faces;
for (int i = 0; i < faces.Length; ++i)
{
Material material = GetMaterial(faces[i], vtf, textureGroup);
if (facesGroupedByMaterial.TryGetValue(material, out List <GeoFace> faceGroup))
{
faceGroup.Add(faces[i]);
}
else
{
facesGroupedByMaterial.Add(material, new List <GeoFace>
{
faces[i]
});
}
}
mesh.subMeshCount = facesGroupedByMaterial.Count;
Dictionary <Material, List <int> > submeshTriangles = new Dictionary <Material, List <int> >();
foreach (KeyValuePair <Material, List <GeoFace> > faceGroup in facesGroupedByMaterial)
{
submeshTriangles[faceGroup.Key] = new List <int>();
List <GeoFace> faceGroupValues = faceGroup.Value;
foreach (GeoFace face in faceGroupValues)
{
int numTriangles = face.VertexRefs.Length - 3 + 1;
int viStart = vertices.Count;
foreach (GeoVertexRef vertexRef in face.VertexRefs)
{
vertices.Add(geoMesh.Vertices[vertexRef.VertexIndex]);
normals.Add(geoMesh.Normals[vertexRef.VertexIndex] * -1);
uvs.Add(vertexRef.Uv);
}
for (int t = 1; t <= numTriangles; t++)
{
submeshTriangles[faceGroup.Key].Add(viStart + t);
submeshTriangles[faceGroup.Key].Add(viStart);
submeshTriangles[faceGroup.Key].Add(viStart + t + 1);
}
}
}
mesh.SetVertices(vertices);
mesh.SetUVs(0, uvs);
mesh.SetNormals(normals);
int subMeshIndex = 0;
foreach (KeyValuePair <Material, List <int> > submeshTriangle in submeshTriangles)
{
mesh.SetTriangles(submeshTriangles[submeshTriangle.Key], subMeshIndex++);
}
mesh.RecalculateBounds();
cacheEntry = new GeoMeshCacheEntry
{
GeoMesh = geoMesh,
Mesh = mesh,
Materials = facesGroupedByMaterial.Select(x => x.Key).ToArray()
};
MeshCache.Add(filename, cacheEntry);
return(cacheEntry);
}