public static string RenderableToPlyFile(IRenderable mesh)
{
int vertCount = mesh.Verts.Vertices.Length;
int triCount = mesh.Verts.Tris;
PlyBuilder plyString = new PlyBuilder();
plyString.WriteHeader(vertCount, triCount);
// Multply the transform matrix by -90 along x to Fix PLY Co-ord Space
Matrix4 RotateX90 = Matrix4.CreateRotationX(MathHelper.DegreesToRadians(-90));
// Vertex Elements
foreach (var vert in mesh.Verts.Vertices)
{
plyString.BuildVertexElement(
Vector3.TransformPosition(vert.Position,
mesh.Transform.Matrix * RotateX90),
vert.Normal, vert.TexCoord, vert.Color);
}
// Face Indices
for (var i = 0; i < mesh.Verts.Indices.Length; i += 3)
{
int idx1 = mesh.Verts.Indices[i];
int idx2 = mesh.Verts.Indices[i + 1];
int idx3 = mesh.Verts.Indices[i + 2];
plyString.BuildFaceElement(idx1, idx2, idx3);
}
return(plyString.ToString());
}
public static string RenderableListToPlyFile(IEnumerable <IRenderable> meshes)
{
int vertCount = 0;
int triCount = 0;
IEnumerable <IRenderable> renderables = meshes as IRenderable[] ?? meshes.ToArray();
foreach (var mesh in renderables)
{
vertCount += mesh.Verts.Vertices.Length;
triCount += mesh.Verts.Tris;
}
PlyBuilder plyString = new PlyBuilder();
plyString.WriteHeader(vertCount, triCount);
// Multply the transform matrix by -90 along x to Fix PLY Co-ord Space
Matrix4 rotateX90 = Matrix4.CreateRotationX(MathHelper.DegreesToRadians(-90));
// Vertex Elements
foreach (var mesh in renderables)
{
foreach (var vert in mesh.Verts.Vertices)
{
plyString.BuildVertexElement(
Vector3.TransformPosition(vert.Position,
mesh.Transform.Matrix * rotateX90),
vert.Normal, vert.TexCoord, vert.Color);
}
}
// Face Indices
int faceBase = 0;
foreach (var mesh in renderables)
{
for (var i = 0; i < mesh.Verts.Indices.Length; i += 3)
{
int idx1 = faceBase + mesh.Verts.Indices[i];
int idx2 = faceBase + mesh.Verts.Indices[i + 1];
int idx3 = faceBase + mesh.Verts.Indices[i + 2];
plyString.BuildFaceElement(idx1, idx2, idx3);
}
faceBase += mesh.Verts.Vertices.Length;
}
return(plyString.ToString());
}