/// <summary>
/// Converts g3.SimpleMesh to UnityEngine.Mesh
/// </summary>
/// <param name="simpleMesh">SimpleMesh</param>
/// <returns>UnityEngine.Mesh</returns>
public static Mesh ToMesh(this SimpleMesh simpleMesh)
{
Mesh unityMesh = new Mesh();
MeshTransforms.ConvertZUpToYUp(simpleMesh);
Vector3[] vertices = new Vector3[simpleMesh.VertexCount];
Color[] colors = new Color[simpleMesh.VertexCount];
Vector2[] uvs = new Vector2[simpleMesh.VertexCount];
Vector3[] normals = new Vector3[simpleMesh.VertexCount];
NewVertexInfo data;
for (int i = 0; i < simpleMesh.VertexCount; i++)
{
data = simpleMesh.GetVertexAll(i);
vertices[i] = (Vector3)data.v;
if (data.bHaveC)
{
colors[i] = (Color)data.c;
}
if (data.bHaveUV)
{
uvs[i] = (Vector2)data.uv;
}
if (data.bHaveN)
{
normals[i] = (Vector3)data.n;
}
}
unityMesh.vertices = vertices;
if (simpleMesh.HasVertexColors)
{
unityMesh.colors = colors;
}
if (simpleMesh.HasVertexUVs)
{
unityMesh.uv = uvs;
}
if (simpleMesh.HasVertexNormals)
{
unityMesh.normals = normals;
}
int[] triangles = new int[simpleMesh.TriangleCount * 3];
int j = 0;
foreach (Index3i tri in simpleMesh.TrianglesItr())
{
triangles[j * 3] = tri.a;
triangles[j * 3 + 1] = tri.b;
triangles[j * 3 + 2] = tri.c;
j++;
}
unityMesh.triangles = triangles;
return(unityMesh);
}
public static Mesh ToStrideMesh(GraphicsDevice graphicsDevice, SimpleMesh g3Mesh, Vector3 offset, float scaling = 1f)
{
if (g3Mesh is null || g3Mesh.VertexCount == 0)
{
return(null);
}
var vertexDeclaration = GetVertexDeclaration(g3Mesh);
var vertices = new byte[g3Mesh.VertexCount * vertexDeclaration.VertexStride];
var boundingBox = BoundingBox.Empty;
BoundingSphere boundingSphere;
unsafe
{
fixed(byte *ptr = vertices)
{
byte *current = ptr;
for (int i = 0; i < g3Mesh.VertexCount; i++)
{
var vi = g3Mesh.GetVertexAll(i);
var p = (new Vector3((float)vi.v.x, (float)vi.v.y, (float)vi.v.z) + offset) * scaling;
BoundingBox.Merge(ref boundingBox, ref p, out boundingBox);
Unsafe.Write(current, p);
current += sizeof(Vector3);
if (vi.bHaveN)
{
Unsafe.Write(current, vi.n);
current += sizeof(Vector3);
}
if (vi.bHaveUV)
{
Unsafe.Write(current, vi.uv);
current += sizeof(Vector2);
}
if (vi.bHaveC)
{
Unsafe.Write(current, new Color(vi.c.x, vi.c.y, vi.c.z));
current += sizeof(Color);
}
}
BoundingSphere.FromPoints((IntPtr)ptr, 0, g3Mesh.VertexCount, vertexDeclaration.VertexStride, out boundingSphere);
}
}
var vertexBuffer = Buffer.New(graphicsDevice, vertices, vertexDeclaration.VertexStride, BufferFlags.VertexBuffer);
var indexBuffer = Buffer.Index.New(graphicsDevice, g3Mesh.Triangles.Reverse().ToArray());
return(new Mesh()
{
Draw = new MeshDraw()
{
VertexBuffers = new VertexBufferBinding[]
{
new VertexBufferBinding(vertexBuffer, vertexDeclaration, g3Mesh.VertexCount)
},
IndexBuffer = new IndexBufferBinding(indexBuffer, is32Bit: true, g3Mesh.Triangles.Length),
DrawCount = g3Mesh.Triangles.Length,
PrimitiveType = PrimitiveType.TriangleList
},
BoundingBox = boundingBox,
BoundingSphere = boundingSphere
});
}
