public Mesh PresentMesh(Mesh mesh)
{
var rotation = mesh.Rotation;
var position = mesh.Position;
List<Vertex> presentPoints = mesh.vertices.Select(x =>
camera.ProjectVertex(x, rotation, position)
).ToList();
return new Mesh(mesh.Name, presentPoints, mesh.Faces);
}
// Loading the JSON file in an asynchronous manner
public static Mesh[] LoadJSONFile(string fileName)
{
var meshes = new List<Mesh>();
var file = File.ReadAllText(fileName);
dynamic jsonObject = Newtonsoft.Json.JsonConvert.DeserializeObject(file);
for (var meshIndex = 0; meshIndex < jsonObject.meshes.Count; meshIndex++)
{
var verticesArray = jsonObject.meshes[meshIndex].vertices;
// Faces
var indicesArray = jsonObject.meshes[meshIndex].indices;
var uvCount = jsonObject.meshes[meshIndex].uvCount.Value;
var verticesStep = 1;
// Depending of the number of texture's coordinates per vertex
// we're jumping in the vertices array by 6, 8 & 10 windows frame
switch ((int)uvCount)
{
case 0:
verticesStep = 6;
break;
case 1:
verticesStep = 8;
break;
case 2:
verticesStep = 10;
break;
}
// the number of interesting vertices information for us
var verticesCount = verticesArray.Count / verticesStep;
// number of faces is logically the size of the array divided by 3 (A, B, C)
var facesCount = indicesArray.Count / 3;
var mesh = new Mesh(jsonObject.meshes[meshIndex].name.Value, verticesCount, facesCount);
// Filling the Vertices array of our mesh first
for (var index = 0; index < verticesCount; index++)
{
var x = (float)verticesArray[index * verticesStep].Value;
var y = (float)verticesArray[index * verticesStep + 1].Value;
var z = (float)verticesArray[index * verticesStep + 2].Value;
// Loading the vertex normal exported by Blender
var nx = (float)verticesArray[index * verticesStep + 3].Value;
var ny = (float)verticesArray[index * verticesStep + 4].Value;
var nz = (float)verticesArray[index * verticesStep + 5].Value;
mesh.vertices[index] = new Vertex { Coordinates = Vector<double>.Build.DenseOfArray(new double[3] {x, y, z})
, Normal = Vector<double>.Build.DenseOfArray(new double[3] {nx, ny, nz}) };
}
// Then filling the Faces array
for (var index = 0; index < facesCount; index++)
{
var a = (int)indicesArray[index * 3].Value;
var b = (int)indicesArray[index * 3 + 1].Value;
var c = (int)indicesArray[index * 3 + 2].Value;
mesh.Faces[index] = new Face { A = a, B = b, C = c };
}
// Getting the position you've set in Blender
var position = jsonObject.meshes[meshIndex].position;
mesh.Position = Vector<double>.Build.DenseOfArray(new double[3] {position[0].Value, position[1].Value, position[2].Value});
meshes.Add(mesh);
}
return meshes.ToArray();
}
