public static RenderMesh LoadFromFile(string filePath)
{
var result = new RenderMesh();
var objData = ObjLoader.LoadObjFile(filePath);
var lastTriangle = 0;
var meshPartsInfo = LoadHeadMeshes(objData, 1.0f, ref lastTriangle);
Vector3 A = new Vector3(99999.0f, 99999.0f, 99999.0f);
Vector3 B = new Vector3(-99999.0f, -99999.0f, -99999.0f);
foreach (var meshPartInfo in meshPartsInfo)
{
foreach (var p in meshPartInfo.VertexPositions)
{
A.X = Math.Min(A.X, p.X);
A.Y = Math.Min(A.Y, p.Y);
A.Z = Math.Min(A.Z, p.Z);
B.X = Math.Max(B.X, p.X);
B.Y = Math.Max(B.Y, p.Y);
B.Z = Math.Max(B.Z, p.Z);
}
}
Vector3 Center = (A + B) * 0.5f;
foreach (var meshPartInfo in meshPartsInfo)
{
var meshPart = new MeshPart();
if (meshPart.Create(meshPartInfo, -Center))
{
result.UpdateAABB(meshPart);
result.Parts.Add(meshPart);
}
}
foreach (var part in result.Parts)
{
part.UpdateBuffers();
}
return(result);
}
public void UpdateAABB(MeshPart part)
{
var a = AABB.A;
var b = AABB.B;
foreach (var vertex in part.Vertices)
{
a.X = Math.Min(vertex.Position.X, a.X);
b.X = Math.Max(vertex.Position.X, b.X);
a.Y = Math.Min(vertex.Position.Y, a.Y);
b.Y = Math.Max(vertex.Position.Y, b.Y);
a.Z = Math.Min(vertex.Position.Z, a.Z);
b.Z = Math.Max(vertex.Position.Z, b.Z);
}
AABB.A = a;
AABB.B = b;
}