private glTFLoader.Schema.Image GetImageFromBitmapText(Bitmap bitmap)
{
byte[] imageBytes = GetImageBytes(bitmap);
var textureBuffer = new glTFLoader.Schema.Buffer();
textureBuffer.Uri = Constants.TextBufferHeader + Convert.ToBase64String(imageBytes);
textureBuffer.ByteLength = imageBytes.Length;
int textureBufferIdx = dummy.Buffers.AddAndReturnIndex(textureBuffer);
// Create bufferviews
var textureBufferView = new BufferView()
{
Buffer = textureBufferIdx,
ByteOffset = 0,
ByteLength = textureBuffer.ByteLength,
};
int textureBufferViewIdx = dummy.BufferViews.AddAndReturnIndex(textureBufferView);
return(new glTFLoader.Schema.Image()
{
BufferView = textureBufferViewIdx,
MimeType = glTFLoader.Schema.Image.MimeTypeEnum.image_png,
});
}
private glTFLoader.Schema.Image GetImageFromFileText(string fileName)
{
byte[] imageBytes = GetImageBytesFromFile(fileName);
var textureBuffer = new glTFLoader.Schema.Buffer()
{
Uri = Constants.TextBufferHeader + Convert.ToBase64String(imageBytes),
ByteLength = imageBytes.Length,
};
int textureBufferIdx = dummy.Buffers.AddAndReturnIndex(textureBuffer);
var textureBufferView = new glTFLoader.Schema.BufferView()
{
Buffer = textureBufferIdx,
ByteOffset = 0,
ByteLength = textureBuffer.ByteLength,
};
int textureBufferViewIdx = dummy.BufferViews.AddAndReturnIndex(textureBufferView);
return(new glTFLoader.Schema.Image()
{
BufferView = textureBufferViewIdx,
MimeType = glTFLoader.Schema.Image.MimeTypeEnum.image_png,
});
}
private Gltf InitializeGlTF()
{
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
root.Translation = new[] { 0.0f, 0.0f, 0.0f };
root.Scale = new[] { 1.0f, 1.0f, 1.0f };
// Set Z up by rotating -90d around the X Axis
var q = new Quaternion(new Vector3(1, 0, 0), -Math.PI / 2);
root.Rotation = new[] {
(float)q.X, (float)q.Y, (float)q.Z, (float)q.W
};
gltf.Nodes = new[] { root };
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] { "KHR_materials_pbrSpecularGlossiness" };
var materialsToAdd = this._materials.Values.ToList();
materialsToAdd.Add(BuiltInMaterials.XAxis);
materialsToAdd.Add(BuiltInMaterials.YAxis);
materialsToAdd.Add(BuiltInMaterials.ZAxis);
materialsToAdd.Add(BuiltInMaterials.Edges);
materialsToAdd.Add(BuiltInMaterials.EdgesHighlighted);
var materials = gltf.AddMaterials(materialsToAdd);
var lines = new List <Vector3>();
foreach (var kvp in this._elements)
{
var e = kvp.Value;
GetRenderDataForElement(e, gltf, materials, lines);
}
AddLines(100000, lines.ToArray(), gltf, materials[BuiltInMaterials.Edges.Name], null);
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = _buffer.Count();
gltf.Buffers = new[] { buff };
return(gltf);
}
private Gltf InitializeGlTF()
{
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
// root.Matrix = new float[]{1.0f,0.0f,0.0f,0.0f,
// 0.0f,0.0f,-1.0f,0.0f,
// 0.0f,1.0f,0.0f,0.0f,
// 0.0f,0.0f,0.0f,1.0f};
root.Translation = new[] { 0.0f, 0.0f, 0.0f };
root.Scale = new[] { 1.0f, 1.0f, 1.0f };
// Set Z up by rotating -90d around the X Axis
var q = new Quaternion(new Vector3(1, 0, 0), -Math.PI / 2);
root.Rotation = new[] {
(float)q.X, (float)q.Y, (float)q.Z, (float)q.W
};
gltf.Nodes = new[] { root };
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] { "KHR_materials_pbrSpecularGlossiness" };
var materials = new Dictionary <string, int>();
foreach (var kvp in this._materials)
{
var m = kvp.Value;
var mId = gltf.AddMaterial(m.Name, m.Color.Red, m.Color.Green, m.Color.Blue, m.Color.Alpha, m.SpecularFactor, m.GlossinessFactor);
materials.Add(m.Name, mId);
}
foreach (var kvp in this._elements)
{
var e = kvp.Value;
GetRenderDataForElement(e, gltf, materials);
}
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = _buffer.Count();
gltf.Buffers = new[] { buff };
return(gltf);
}
private static void AddMesh(gltf.Gltf gltf, XbimMesher mesh)
{
gltf.Buffers = new glTFLoader.Schema.Buffer[1];
var buf = new glTFLoader.Schema.Buffer();
gltf.Buffers[0] = buf;
gltf.BufferViews = new gltf.BufferView[2];
}
private static Byte[] TryLoadBase64BinaryBufferUnchecked(Schema.Buffer buffer, string prefix)
{
if (buffer.Uri == null || !buffer.Uri.StartsWith(prefix, StringComparison.OrdinalIgnoreCase))
{
return(null);
}
var content = buffer.Uri.Substring(prefix.Length);
return(Convert.FromBase64String(content));
}
private static Byte[] LoadBinaryBufferUnchecked(Schema.Buffer buffer, Func <string, Byte[]> externalReferenceSolver)
{
if (buffer.Uri == null)
{
return(externalReferenceSolver(null));
}
if (buffer.Uri.StartsWith(EMBEDDEDOCTETSTREAM))
{
var content = buffer.Uri.Substring(EMBEDDEDOCTETSTREAM.Length);
return(Convert.FromBase64String(content));
}
return(externalReferenceSolver(buffer.Uri));
}
private static byte[] ReadBuffer(glTFLoader.Schema.Buffer buffer)
{
var match = Regex.Match(buffer.Uri, @"data:application/octet-stream;base64,(?<data>.+)");
if (match.Success)
{
var base64Data = match.Groups["data"].Value;
var binData = Convert.FromBase64String(base64Data);
if (binData.Length != buffer.ByteLength)
{
throw new FormatException("Buffer has wrong length");
}
return(binData);
}
throw new FormatException("Only support inline encoded buffers, not external buffer files.");
}
public void WriteDracoBytes(byte[] bytes, out int bufferIndex, out int byteOffset)
{
if (binary)
{
byteOffset = (int)binaryBuffer.Count;
binaryBuffer.AddRange(bytes);
bufferIndex = 0;
}
else
{
glTFLoader.Schema.Buffer buffer = new glTFLoader.Schema.Buffer()
{
Uri = Constants.TextBufferHeader + Convert.ToBase64String(bytes),
ByteLength = bytes.Length,
};
bufferIndex = dummy.Buffers.AddAndReturnIndex(buffer);
byteOffset = 0;
}
}
internal static void ToGlb(this Solid solid, string path)
{
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
root.Translation = new[] { 0.0f, 0.0f, 0.0f };
root.Scale = new[] { 1.0f, 1.0f, 1.0f };
// Set Z up by rotating -90d around the X Axis
var q = new Quaternion(new Vector3(1, 0, 0), -Math.PI / 2);
root.Rotation = new[] {
(float)q.X, (float)q.Y, (float)q.Z, (float)q.W
};
gltf.Nodes = new[] { root };
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] { "KHR_materials_pbrSpecularGlossiness" };
var materials = gltf.AddMaterials(new[] { BuiltInMaterials.Default, BuiltInMaterials.Edges, BuiltInMaterials.EdgesHighlighted });
var buffer = new List <byte>();
var mesh = new Elements.Geometry.Mesh();
solid.Tessellate(ref mesh);
gltf.AddTriangleMesh("mesh", buffer, mesh.Vertices.ToArray(), mesh.Normals.ToArray(),
mesh.Indices.ToArray(), mesh.VertexColors.ToArray(),
mesh.VMin, mesh.VMax, mesh.NMin, mesh.NMax, mesh.CMin, mesh.CMax,
mesh.IMin, mesh.IMax, materials[BuiltInMaterials.Default.Name], null, null);
var edgeCount = 0;
var vertices = new List <Vector3>();
var verticesHighlighted = new List <Vector3>();
foreach (var e in solid.Edges.Values)
{
if (e.Left.Loop == null || e.Right.Loop == null)
{
verticesHighlighted.AddRange(new[] { e.Left.Vertex.Point, e.Right.Vertex.Point });
}
else
{
vertices.AddRange(new[] { e.Left.Vertex.Point, e.Right.Vertex.Point });
}
edgeCount++;
}
if (vertices.Count > 0)
{
// Draw standard edges
var vBuff = vertices.ToArray().ToArray();
var vCount = vertices.Count;
// var indices = Enumerable.Range(0, vCount).Select(i => (ushort)i).ToArray();
var indices = new List <ushort>();
for (var i = 0; i < vertices.Count; i += 2)
{
indices.Add((ushort)i);
indices.Add((ushort)(i + 1));
}
var bbox = new BBox3(vertices.ToArray());
gltf.AddLineLoop($"edge_{edgeCount}", buffer, vBuff, indices.ToArray(), bbox.Min.ToArray(), bbox.Max.ToArray(), 0, (ushort)(vCount - 1), materials[BuiltInMaterials.Edges.Name], MeshPrimitive.ModeEnum.LINES, null);
}
if (verticesHighlighted.Count > 0)
{
// Draw highlighted edges
var vBuff = vertices.ToArray().ToArray();
var vCount = vertices.Count;
var indices = new List <ushort>();
for (var i = 0; i < vertices.Count; i += 2)
{
indices.Add((ushort)i);
indices.Add((ushort)(i + 1));
}
var bbox = new BBox3(vertices.ToArray());
gltf.AddLineLoop($"edge_{edgeCount}", buffer, vBuff, indices.ToArray(), bbox.Min.ToArray(), bbox.Max.ToArray(), 0, (ushort)(vCount - 1), materials[BuiltInMaterials.EdgesHighlighted.Name], MeshPrimitive.ModeEnum.LINES, null);
}
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = buffer.Count;
gltf.Buffers = new[] { buff };
if (File.Exists(path))
{
File.Delete(path);
}
gltf.SaveBinaryModel(buffer.ToArray(), path);
}
private static Gltf InitializeGlTF(Model model, List <byte> buffer)
{
var sw = new Stopwatch();
sw.Start();
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
root.Translation = new[] { 0.0f, 0.0f, 0.0f };
root.Scale = new[] { 1.0f, 1.0f, 1.0f };
// Set Z up by rotating -90d around the X Axis
var q = new Quaternion(new Vector3(1, 0, 0), -Math.PI / 2);
root.Rotation = new[] {
(float)q.X, (float)q.Y, (float)q.Z, (float)q.W
};
gltf.Nodes = new[] { root };
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] { "KHR_materials_pbrSpecularGlossiness" };
sw.Stop();
Console.WriteLine($"glTF: {sw.Elapsed} elapsed for writing root node.");
sw.Reset();
sw.Start();
var materialsToAdd = model.Materials.Values.ToList();
materialsToAdd.Add(BuiltInMaterials.XAxis);
materialsToAdd.Add(BuiltInMaterials.YAxis);
materialsToAdd.Add(BuiltInMaterials.ZAxis);
materialsToAdd.Add(BuiltInMaterials.Edges);
materialsToAdd.Add(BuiltInMaterials.EdgesHighlighted);
var materials = gltf.AddMaterials(materialsToAdd);
sw.Stop();
Console.WriteLine($"glTF: {sw.Elapsed} elapsed for writing materials.");
sw.Reset();
sw.Start();
// Lines are stored in a list of lists
// according to the max available index size of ushort.
var lines = new List <List <Vector3> >()
{
new List <Vector3>()
};
var bufferViews = new List <BufferView>();
var accessors = new List <Accessor>();
var elements = model.Elements.Values.ToArray();
for (var i = 0; i < elements.Length; i++)
{
var e = elements[i];
GetRenderDataForElement(e, gltf, materials, lines, buffer, bufferViews, accessors);
}
sw.Stop();
Console.WriteLine($"glTF: {sw.Elapsed} elapsed for getting render data for nodes.");
sw.Reset();
sw.Start();
if (lines.Count > 0)
{
foreach (var lineSet in lines)
{
if (lineSet.Count > 0)
{
AddLines(100000, lineSet.ToArray(), gltf, materials[BuiltInMaterials.Edges.Name], buffer, bufferViews, accessors);
}
}
}
sw.Stop();
Console.WriteLine($"glTF: {sw.Elapsed} elapsed for writing edges.");
sw.Reset();
sw.Start();
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = buffer.Count();
gltf.Buffers = new[] { buff };
sw.Stop();
Console.WriteLine($"glTF: {sw.Elapsed} elapsed for assigning buffer.");
sw.Reset();
gltf.BufferViews = bufferViews.ToArray();
gltf.Accessors = accessors.ToArray();
return(gltf);
}
internal static void ToGlb(this Solid solid, string path)
{
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
root.Translation = new[] { 0.0f, 0.0f, 0.0f };
root.Scale = new[] { 1.0f, 1.0f, 1.0f };
// Set Z up by rotating -90d around the X Axis
var q = new Quaternion(new Vector3(1, 0, 0), -Math.PI / 2);
root.Rotation = new[] {
(float)q.X, (float)q.Y, (float)q.Z, (float)q.W
};
gltf.Nodes = new[] { root };
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] { "KHR_materials_pbrSpecularGlossiness" };
var materials = gltf.AddMaterials(new[] { BuiltInMaterials.Default, BuiltInMaterials.Edges, BuiltInMaterials.EdgesHighlighted });
var buffer = new List <byte>();
var mesh = new Elements.Geometry.Mesh();
solid.Tessellate(ref mesh);
byte[] vertexBuffer;
byte[] normalBuffer;
byte[] indexBuffer;
byte[] colorBuffer;
double[] vmin; double[] vmax;
double[] nmin; double[] nmax;
float[] cmin; float[] cmax;
ushort imin; ushort imax;
mesh.GetBuffers(out vertexBuffer, out indexBuffer, out normalBuffer, out colorBuffer,
out vmax, out vmin, out nmin, out nmax, out cmin,
out cmax, out imin, out imax);
var bufferViews = new List <BufferView>();
var accessors = new List <Accessor>();
gltf.AddTriangleMesh("mesh", buffer, bufferViews, accessors, vertexBuffer, normalBuffer,
indexBuffer, colorBuffer, vmin, vmax, nmin, nmax,
imin, imax, materials[BuiltInMaterials.Default.Name], cmin, cmax, null, null);
var edgeCount = 0;
var vertices = new List <Vector3>();
var verticesHighlighted = new List <Vector3>();
foreach (var e in solid.Edges.Values)
{
if (e.Left.Loop == null || e.Right.Loop == null)
{
verticesHighlighted.AddRange(new[] { e.Left.Vertex.Point, e.Right.Vertex.Point });
}
else
{
vertices.AddRange(new[] { e.Left.Vertex.Point, e.Right.Vertex.Point });
}
edgeCount++;
}
if (vertices.Count > 0)
{
// Draw standard edges
AddLines(100000, vertices.ToArray(), gltf, materials[BuiltInMaterials.Edges.Name], buffer, bufferViews, accessors);
}
if (verticesHighlighted.Count > 0)
{
// Draw highlighted edges
AddLines(100001, verticesHighlighted.ToArray(), gltf, materials[BuiltInMaterials.EdgesHighlighted.Name], buffer, bufferViews, accessors);
}
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = buffer.Count;
gltf.Buffers = new[] { buff };
gltf.BufferViews = bufferViews.ToArray();
gltf.Accessors = accessors.ToArray();
if (File.Exists(path))
{
File.Delete(path);
}
gltf.SaveBinaryModel(buffer.ToArray(), path);
}
static byte[] loadDataUri (GL.Buffer buff) {
int idxComa = buff.Uri.IndexOf (",", 5, StringComparison.Ordinal);
return Convert.FromBase64String (buff.Uri.Substring (idxComa + 1));
}
private static Gltf InitializeGlTF(Model model, List <byte> buffer, bool drawEdges = false)
{
var gltf = new Gltf();
var asset = new Asset();
asset.Version = "2.0";
asset.Generator = "hypar-gltf";
gltf.Asset = asset;
var root = new Node();
var rootTransform = new Transform(model.Transform);
// Rotate the transform for +Z up.
rootTransform.Rotate(new Vector3(1, 0, 0), -90.0);
var m = rootTransform.Matrix;
root.Matrix = new float[] {
(float)m.m11, (float)m.m12, (float)m.m13, 0f,
(float)m.m21, (float)m.m22, (float)m.m23, 0f,
(float)m.m31, (float)m.m32, (float)m.m33, 0f,
(float)m.tx, (float)m.ty, (float)m.tz, 1f
};
var nodes = new List <glTFLoader.Schema.Node> {
root
};
var meshes = new List <glTFLoader.Schema.Mesh>();
gltf.Scene = 0;
var scene = new Scene();
scene.Nodes = new[] { 0 };
gltf.Scenes = new[] { scene };
gltf.ExtensionsUsed = new[] {
"KHR_materials_pbrSpecularGlossiness",
"KHR_materials_unlit",
"KHR_lights_punctual"
};
var bufferViews = new List <BufferView>();
var accessors = new List <Accessor>();
var materialsToAdd = model.AllElementsOfType <Material>().ToList();
if (drawEdges)
{
materialsToAdd.Add(BuiltInMaterials.Edges);
}
var materials = gltf.AddMaterials(materialsToAdd, buffer, bufferViews);
var elements = model.Elements.Where(e =>
{
return(e.Value is GeometricElement || e.Value is ElementInstance);
}).Select(e => e.Value).ToList();
var lights = model.AllElementsOfType <DirectionalLight>().ToList();
gltf.AddLights(lights, nodes);
// Lines are stored in a list of lists
// according to the max available index size.
var lines = new List <List <Vector3> >();
var currLines = new List <Vector3>();
lines.Add(currLines);
var meshElementMap = new Dictionary <Guid, List <int> >();
foreach (var e in elements)
{
// Check if we'll overrun the index size
// for the current line array. If so,
// create a new line array.
if (currLines.Count * 2 > ushort.MaxValue)
{
currLines = new List <Vector3>();
lines.Add(currLines);
}
GetRenderDataForElement(e,
gltf,
materials,
buffer,
bufferViews,
accessors,
meshes,
nodes,
meshElementMap,
currLines,
drawEdges);
}
if (buffer.Count == 0 && lights.Count == 0)
{
return(null);
}
if (drawEdges && lines.Count() > 0)
{
foreach (var lineSet in lines)
{
if (lineSet.Count == 0)
{
continue;
}
AddLines(GetNextId(), lineSet, gltf, materials[BuiltInMaterials.Edges.Name], buffer, bufferViews, accessors, meshes, nodes, false);
}
}
var buff = new glTFLoader.Schema.Buffer();
buff.ByteLength = buffer.Count;
gltf.Buffers = new[] { buff };
gltf.BufferViews = bufferViews.ToArray();
gltf.Accessors = accessors.ToArray();
gltf.Nodes = nodes.ToArray();
if (meshes.Count > 0)
{
gltf.Meshes = meshes.ToArray();
}
return(gltf);
}
public Gltf FromBrg(BrgFile brg, Stream bufferStream)
{
// TODO clear class fields
gltf.Asset = new Asset();
gltf.Asset.Version = "2.0";
Scene scene = new Scene();
scene.Nodes = new int[] { 0 };
gltf.Scenes = new[] { scene };
gltf.Scene = 0;
Node node = new Node();
node.Mesh = 0;
node.Name = "node";
gltf.Nodes = new[] { node };
//FromBrgMesh(brg.Meshes[0]);
// Create materials / textures
// Create primitives from first brg mesh
// TODO: check if there is at least 1 mesh, and 1 face
var primitives = (from face in brg.Meshes[0].Faces
group face by face.MaterialIndex into faceGroup
select new BrgMeshPrimitive(faceGroup.ToList())).ToList();
// Load mesh data
glTFLoader.Schema.Mesh mesh = new glTFLoader.Schema.Mesh();
mesh.Primitives = new MeshPrimitive[primitives.Count];
for (int i = 0; i < mesh.Primitives.Length; ++i)
{
mesh.Primitives[i] = new MeshPrimitive();
}
for (int j = 0; j < primitives.Count; ++j)
{
primitives[j].Serialize(mesh.Primitives[j], brg.Meshes[0], this, bufferStream);
}
for (int i = 0; i < brg.Meshes[0].MeshAnimations.Count; ++i)
{
for (int j = 0; j < primitives.Count; ++j)
{
primitives[j].Serialize(mesh.Primitives[j], (BrgMesh)brg.Meshes[0].MeshAnimations[i], this, bufferStream);
}
}
gltf.Meshes = new[] { mesh };
// Create Animation
if (brg.Meshes[0].MeshAnimations.Count > 0)
{
for (int i = 0; i < mesh.Primitives.Length; ++i)
{
mesh.Primitives[i].Targets = primitives[i].Targets.ToArray();
}
mesh.Weights = new float[brg.Meshes[0].MeshAnimations.Count];
gltf.Animations = new[] { CreateAnimation(brg.Animation, mesh.Weights.Length, bufferStream) };
}
// Create buffer stream
gltf.BufferViews = bufferViews.ToArray();
gltf.Accessors = accessors.ToArray();
var buffer = new glTFLoader.Schema.Buffer();
gltf.Buffers = new[] { buffer };
buffer.ByteLength = (int)bufferStream.Length;
buffer.Uri = "dataBuffer.bin";
return(gltf);
}
/// <summary>
/// Creates a single buffer and a minimum number of buffer-views to pack all the accessors.
/// </summary>
private void PackAccessors(GltfFile modelFile, Stream newBufferStream, string outputBufferUri)
{
var fileData = modelFile.Data;
var buffers = fileData.Buffers;
var bufferViews = fileData.BufferViews;
// TODO: Check sparse accessors
// Group accessor by optional target, component-stride and component byte-length
// For each group, we need to create a single buffer-view.
var accessorGroups = fileData
.Accessors
.Where(a => a.BufferView.HasValue)
.GroupBy(a => (target: bufferViews[a.BufferView.Value].Target, stride: a.GetByteStride(bufferViews) /*, componentByteLength: a.GetComponentByteLength()*/))
.ToDictionary(g => g.Key, g => g.ToArray());
// NOTE: The following select sequence has a side-effect
var newBufferViews = accessorGroups
.Select((pair, newBufferViewIndex) =>
{
//var ((target, stride, componentByteLength), accessors) = pair;
var((target, stride), accessors) = pair;
var newBufferViewOffset = (int)newBufferStream.Position;
//Debug.Assert(newBufferStream.GetComponentPadding(componentByteLength) == 0);
foreach (var accessor in accessors)
{
var componentByteLength = accessor.GetComponentByteLength();
var accessorPadding = newBufferStream.GetComponentPadding(componentByteLength);
newBufferStream.WriteByte(0, accessorPadding);
var newAccessorByteOffset = (int)(newBufferStream.Position - newBufferViewOffset);
Debug.Assert(accessor.BufferView.HasValue);
var bufferView = bufferViews[accessor.BufferView.Value];
var buffer = buffers[bufferView.Buffer];
var data = _bufferFileData[buffer];
var bufferOffset = bufferView.ByteOffset + accessor.ByteOffset;
var rowLength = accessor.GetComponentDimension() * componentByteLength;
for (int i = 0; i < accessor.Count; ++i)
{
Debug.Assert(newBufferStream.GetComponentPadding(componentByteLength) == 0);
newBufferStream.Write(data, bufferOffset + i * stride, rowLength);
Debug.Assert(newBufferStream.GetComponentPadding(componentByteLength) == 0);
}
// Patch the accessor.
accessor.ByteOffset = newAccessorByteOffset;
accessor.BufferView = newBufferViewIndex;
}
var newBufferView = new BufferView
{
Target = target,
ByteOffset = newBufferViewOffset,
ByteStride = target == BufferView.TargetEnum.ARRAY_BUFFER ? stride : (int?)null,
ByteLength = (int)(newBufferStream.Position - newBufferViewOffset)
};
return(newBufferView);
})
.ToArray();
var newBuffer = new Buffer
{
ByteLength = (int)newBufferStream.Length,
Uri = outputBufferUri
};
fileData.BufferViews = newBufferViews;
fileData.Buffers = new[] { newBuffer };
}
private static Byte[] LoadBinaryBufferUnchecked(Schema.Buffer buffer, Func <string, Byte[]> externalReferenceSolver)
{
return(TryLoadBase64BinaryBufferUnchecked(buffer, EMBEDDEDGLTFBUFFER)
?? TryLoadBase64BinaryBufferUnchecked(buffer, EMBEDDEDOCTETSTREAM)
?? externalReferenceSolver(buffer?.Uri));
}
/// <summary>
/// Converts self contained GLB to glTF file and associated textures and data
/// </summary>
/// <param name="inputFilePath">glTF binary file (.glb) to unpack</param>
/// <param name="outputDirectoryPath">Directory where the files will be extracted</param>
public static void Unpack(string inputFilePath, string outputDirectoryPath)
{
if (!File.Exists(inputFilePath))
{
throw new ArgumentException("Input file does not exists");
}
if (!Directory.Exists(outputDirectoryPath))
{
throw new ArgumentException("Ouput directory does not exists");
}
string inputFileName = Path.GetFileNameWithoutExtension(inputFilePath);
string inputDirectoryPath = Path.GetDirectoryName(inputFilePath);
var model = Interface.LoadModel(inputFilePath);
glTFLoader.Schema.Buffer binBuffer = null;
byte[] binBufferData = null;
if (model.Buffers != null && string.IsNullOrEmpty(model.Buffers[0].Uri))
{
binBuffer = model.Buffers[0];
binBufferData = model.LoadBinaryBuffer(0, inputFilePath);
}
var imageBufferViewIndices = new List <int>();
if (model.Images != null)
{
for (var index = 0; index < model.Images.Length; index++)
{
var image = model.Images[index];
if (!string.IsNullOrEmpty(image.Uri))
{
if (!image.Uri.StartsWith("data:"))
{
var sourceFilePath = Path.Combine(inputDirectoryPath, image.Uri);
var fileName = $"{inputFilePath}_image{index}.bin";
if (File.Exists(sourceFilePath))
{
var destinationFilePath = Path.Combine(outputDirectoryPath, fileName);
File.Copy(sourceFilePath, destinationFilePath, true);
}
image.Uri = fileName;
}
}
else if (image.BufferView.HasValue)
{
var bufferView = model.BufferViews[image.BufferView.Value];
if (bufferView.Buffer == 0)
{
imageBufferViewIndices.Add(image.BufferView.Value);
var fileExtension = image.MimeType == Image.MimeTypeEnum.image_jpeg ? "jpg" : "png";
var fileName = $"{inputFileName}_image{index}.{fileExtension}";
using (var fileStream = File.Create(Path.Combine(outputDirectoryPath, fileName)))
{
fileStream.Write(binBufferData, bufferView.ByteOffset, bufferView.ByteLength);
}
image.BufferView = null;
image.MimeType = null;
image.Uri = fileName;
}
}
}
}
if (model.BufferViews != null)
{
var binFileName = $"{inputFileName}.bin";
var binFilePath = Path.Combine(outputDirectoryPath, binFileName);
var binByteLength = 0;
var indexMap = new Dictionary <int, int>();
var bufferViews = new List <BufferView>();
using (var fileStream = File.Create(binFilePath))
{
for (var index = 0; index < model.BufferViews.Length; index++)
{
if (!imageBufferViewIndices.Any(imageIndex => imageIndex == index))
{
var bufferView = model.BufferViews[index];
if (bufferView.Buffer == 0)
{
fileStream.Align(4);
var fileStreamPosition = fileStream.Position;
fileStream.Write(binBufferData, bufferView.ByteOffset, bufferView.ByteLength);
bufferView.ByteOffset = (int)fileStreamPosition;
}
var newIndex = bufferViews.Count;
if (index != newIndex)
{
indexMap.Add(index, newIndex);
}
bufferViews.Add(bufferView);
}
}
binByteLength = (int)fileStream.Length;
}
model.BufferViews = bufferViews.ToArray();
if (binByteLength == 0)
{
File.Delete(binFilePath);
if (binBuffer != null)
{
model.Buffers = model.Buffers.Skip(1).ToArray();
foreach (var bufferView in model.BufferViews)
{
bufferView.Buffer--;
}
}
}
else
{
binBuffer.Uri = binFileName;
binBuffer.ByteLength = binByteLength;
}
if (model.Accessors != null)
{
foreach (var accessor in model.Accessors)
{
if (accessor.BufferView.HasValue)
{
if (indexMap.TryGetValue(accessor.BufferView.Value, out int newIndex))
{
accessor.BufferView = newIndex;
}
}
}
}
}
if (model.Buffers != null)
{
for (var index = 1; index < model.Buffers.Length; index++)
{
var buffer = model.Buffers[index];
if (!buffer.Uri.StartsWith("data:"))
{
var sourceFilePath = Path.Combine(inputDirectoryPath, buffer.Uri);
var fileName = $"{inputFileName}{index}.bin";
if (File.Exists(sourceFilePath))
{
var destinationFilePath = Path.Combine(outputDirectoryPath, fileName);
File.Copy(sourceFilePath, destinationFilePath, true);
}
buffer.Uri = fileName;
}
}
}
Interface.SaveModel(model, Path.Combine(outputDirectoryPath, $"{inputFileName}.gltf"));
}
private void FromBrgMesh(BrgMesh brgMesh)
{
Vector3 max = new Vector3(float.MinValue);
Vector3 min = new Vector3(float.MaxValue);
using (FileStream fs = File.Open("posBuffer.bin", FileMode.Create, FileAccess.Write, FileShare.Read))
using (BinaryWriter writer = new BinaryWriter(fs))
{
foreach (Vector3 vec in brgMesh.Vertices)
{
max.X = Math.Max(max.X, vec.X);
max.Y = Math.Max(max.Y, vec.Y);
max.Z = Math.Max(max.Z, vec.Z);
min.X = Math.Min(min.X, vec.X);
min.Y = Math.Min(min.Y, vec.Y);
min.Z = Math.Min(min.Z, vec.Z);
writer.Write(vec.X);
writer.Write(vec.Y);
writer.Write(vec.Z);
}
}
glTFLoader.Schema.Buffer posBuffer = new glTFLoader.Schema.Buffer();
posBuffer.ByteLength = brgMesh.Vertices.Count * 12;
posBuffer.Uri = "posBuffer.bin";
BufferView posBufferView = new BufferView();
posBufferView.Buffer = 0;
posBufferView.ByteLength = posBuffer.ByteLength;
posBufferView.ByteOffset = 0;
posBufferView.ByteStride = 12;
posBufferView.Name = "posBufferView";
posBufferView.Target = BufferView.TargetEnum.ARRAY_BUFFER;
Accessor posAccessor = new Accessor();
posAccessor.BufferView = 0;
posAccessor.ByteOffset = 0;
posAccessor.ComponentType = Accessor.ComponentTypeEnum.FLOAT;
posAccessor.Count = brgMesh.Vertices.Count;
posAccessor.Max = new[] { max.X, max.Y, max.Z };
posAccessor.Min = new[] { min.X, min.Y, min.Z };
posAccessor.Name = "posBufferViewAccessor";
posAccessor.Type = Accessor.TypeEnum.VEC3;
short faceMin = short.MaxValue;
short faceMax = short.MinValue;
using (FileStream fs = File.Open("indexBuffer.bin", FileMode.Create, FileAccess.Write, FileShare.Read))
using (BinaryWriter writer = new BinaryWriter(fs))
{
foreach (var face in brgMesh.Faces)
{
faceMin = Math.Min(faceMin, face.Indices[0]);
faceMin = Math.Min(faceMin, face.Indices[1]);
faceMin = Math.Min(faceMin, face.Indices[2]);
faceMax = Math.Max(faceMax, face.Indices[0]);
faceMax = Math.Max(faceMax, face.Indices[1]);
faceMax = Math.Max(faceMax, face.Indices[2]);
writer.Write(face.Indices[0]);
writer.Write(face.Indices[1]);
writer.Write(face.Indices[2]);
}
}
glTFLoader.Schema.Buffer indexBuffer = new glTFLoader.Schema.Buffer();
indexBuffer.ByteLength = brgMesh.Faces.Count * 6;
indexBuffer.Uri = "indexBuffer.bin";
BufferView indexBufferView = new BufferView();
indexBufferView.Buffer = 1;
indexBufferView.ByteLength = indexBuffer.ByteLength;
indexBufferView.ByteOffset = 0;
indexBufferView.Name = "indexBufferView";
indexBufferView.Target = BufferView.TargetEnum.ELEMENT_ARRAY_BUFFER;
Accessor indexAccessor = new Accessor();
indexAccessor.BufferView = 1;
indexAccessor.ByteOffset = 0;
indexAccessor.ComponentType = Accessor.ComponentTypeEnum.UNSIGNED_SHORT;
indexAccessor.Count = brgMesh.Faces.Count * 3;
indexAccessor.Max = new[] { (float)faceMax };
indexAccessor.Min = new[] { (float)faceMin };
indexAccessor.Name = "indexBufferViewAccessor";
indexAccessor.Type = Accessor.TypeEnum.SCALAR;
gltf.Buffers = new[] { posBuffer, indexBuffer };
gltf.BufferViews = new[] { posBufferView, indexBufferView };
gltf.Accessors = new[] { posAccessor, indexAccessor };
MeshPrimitive meshPrimitive = new MeshPrimitive();
meshPrimitive.Attributes = new Dictionary <string, int>();
meshPrimitive.Attributes.Add("POSITION", 0);
meshPrimitive.Indices = 1;
meshPrimitive.Mode = MeshPrimitive.ModeEnum.TRIANGLES;
var mesh = new glTFLoader.Schema.Mesh();
mesh.Name = "mesh";
mesh.Primitives = new[] { meshPrimitive };
gltf.Meshes = new[] { mesh };
Node node = new Node();
node.Mesh = 0;
node.Name = "node";
gltf.Nodes = new[] { node };
}
