protected List <Containers.Mesh> Process(Assimp.Scene scene)
{
List <Containers.Mesh> meshes = new List <Containers.Mesh>();
if (scene.HasMeshes)
{
foreach (Assimp.Mesh m in scene.Meshes)
{
if (m.HasNormals && m.HasTextureCoords(0) && m.HasVertices)
{
Containers.Mesh ms = new Containers.Mesh();
foreach (Vector3D v in m.Normals)
{
ms.normals.Add(new Materia.Math3D.Vector3(v.X, v.Y, v.Z));
//we also add placeholders for tangents
ms.tangents.Add(new Materia.Math3D.Vector4(0, 0, 0, 1));
}
foreach (Vector3D v in m.Vertices)
{
ms.vertices.Add(new Materia.Math3D.Vector3(v.X, v.Y, v.Z));
}
foreach (Vector3D v in m.TextureCoordinateChannels[0])
{
ms.uv.Add(new Materia.Math3D.Vector2(v.X, v.Y));
}
ms.indices = new List <int>(m.GetIndices());
//store faces for use with Mikktspace generation
//and for displaying UVs
foreach (Face f in m.Faces)
{
if (f.IndexCount == 3)
{
Triangle t = new Triangle();
t.n0 = t.v0 = t.u0 = f.Indices[0];
t.n1 = t.v1 = t.u1 = f.Indices[1];
t.n2 = t.v2 = t.u2 = f.Indices[2];
ms.AddTriangle(t);
}
}
//generate tangents using mikktspace
Mikkt.GenTangents(ms);
meshes.Add(ms);
}
}
}
return(meshes);
}
public override List <Containers.Mesh> Parse(string path)
{
List <Containers.Mesh> meshes = new List <Containers.Mesh>();
AssimpContext ctx = new AssimpContext();
var scene = ctx.ImportFile(path, PostProcessSteps.Triangulate);
if (scene.HasMeshes)
{
foreach (Assimp.Mesh m in scene.Meshes)
{
if (m.HasNormals && m.HasTextureCoords(0) && m.HasVertices)
{
Containers.Mesh ms = new Containers.Mesh();
foreach (Vector3D v in m.Normals)
{
ms.normals.Add(new OpenTK.Vector3(v.X, v.Y, v.Z));
//we also add placeholders for tangents
ms.tangents.Add(new OpenTK.Vector4(0, 0, 0, 1));
}
foreach (Vector3D v in m.Vertices)
{
ms.vertices.Add(new OpenTK.Vector3(v.X, v.Y, v.Z));
}
foreach (Vector3D v in m.TextureCoordinateChannels[0])
{
ms.uv.Add(new OpenTK.Vector2(v.X, v.Y));
}
ms.indices = new List <int>(m.GetIndices());
//store faces for use with Mikktspace generation
//and for displaying UVs
foreach (Face f in m.Faces)
{
if (f.IndexCount == 3)
{
Triangle t = new Triangle();
t.n0 = t.v0 = t.u0 = f.Indices[0];
t.n1 = t.v1 = t.u1 = f.Indices[1];
t.n2 = t.v2 = t.u2 = f.Indices[2];
ms.AddTriangle(t);
}
}
//generate tangents using mikktspace
Mikkt.GenTangents(ms);
meshes.Add(ms);
}
}
}
ctx.Dispose();
return(meshes);
}
