private Mesh CreateGltfMesh(string meshName, VMesh vmesh, ModelRoot model, bool includeJoints)
{
ProgressDialog.SetProgress($"Creating mesh: {meshName}");
var data = vmesh.GetData();
var vbib = vmesh.VBIB;
var mesh = model.CreateMesh(meshName);
mesh.Name = meshName;
foreach (var sceneObject in data.GetArray("m_sceneObjects"))
{
foreach (var drawCall in sceneObject.GetArray("m_drawCalls"))
{
var vertexBufferInfo = drawCall.GetArray("m_vertexBuffers")[0]; // In what situation can we have more than 1 vertex buffer per draw call?
var vertexBufferIndex = (int)vertexBufferInfo.GetIntegerProperty("m_hBuffer");
var vertexBuffer = vbib.VertexBuffers[vertexBufferIndex];
var indexBufferInfo = drawCall.GetSubCollection("m_indexBuffer");
var indexBufferIndex = (int)indexBufferInfo.GetIntegerProperty("m_hBuffer");
var indexBuffer = vbib.IndexBuffers[indexBufferIndex];
// Create one primitive per draw call
var primitive = mesh.CreatePrimitive();
// Avoid duplicate attribute names
var attributeCounters = new Dictionary <string, int>();
// Set vertex attributes
foreach (var attribute in vertexBuffer.Attributes)
{
attributeCounters.TryGetValue(attribute.Name, out var attributeCounter);
attributeCounters[attribute.Name] = attributeCounter + 1;
var accessorName = GetAccessorName(attribute.Name, attributeCounter);
var buffer = ReadAttributeBuffer(vertexBuffer, attribute);
var numComponents = buffer.Length / vertexBuffer.Count;
if (attribute.Name == "BLENDINDICES")
{
if (!includeJoints)
{
continue;
}
var byteBuffer = buffer.Select(f => (byte)f).ToArray();
var rawBufferData = new byte[buffer.Length];
System.Buffer.BlockCopy(byteBuffer, 0, rawBufferData, 0, rawBufferData.Length);
var bufferView = mesh.LogicalParent.UseBufferView(rawBufferData);
var accessor = mesh.LogicalParent.CreateAccessor();
accessor.SetVertexData(bufferView, 0, buffer.Length / 4, DimensionType.VEC4, EncodingType.UNSIGNED_BYTE);
primitive.SetVertexAccessor(accessorName, accessor);
continue;
}
if (attribute.Name == "NORMAL" && DrawCall.IsCompressedNormalTangent(drawCall))
{
var vectors = ToVector4Array(buffer);
var(normals, tangents) = DecompressNormalTangents(vectors);
primitive.WithVertexAccessor("NORMAL", normals);
primitive.WithVertexAccessor("TANGENT", tangents);
continue;
}
if (attribute.Name == "BLENDINDICES")
{
var byteBuffer = buffer.Select(f => (byte)f).ToArray();
var bufferView = mesh.LogicalParent.UseBufferView(byteBuffer);
var accessor = mesh.LogicalParent.CreateAccessor();
accessor.SetVertexData(bufferView, 0, buffer.Length / 4, DimensionType.VEC4, EncodingType.UNSIGNED_BYTE);
primitive.SetVertexAccessor(accessorName, accessor);
continue;
}
if (attribute.Name == "TEXCOORD" && numComponents != 2)
{
// We are ignoring some data, but non-2-component UVs cause failures in gltf consumers
continue;
}
switch (numComponents)
{
case 4:
{
var vectors = ToVector4Array(buffer);
primitive.WithVertexAccessor(accessorName, vectors);
break;
}
case 3:
{
var vectors = ToVector3Array(buffer);
primitive.WithVertexAccessor(accessorName, vectors);
break;
}
case 2:
{
var vectors = ToVector2Array(buffer);
primitive.WithVertexAccessor(accessorName, vectors);
break;
}
case 1:
{
primitive.WithVertexAccessor(accessorName, buffer);
break;
}
default:
throw new NotImplementedException($"Attribute \"{attribute.Name}\" has {numComponents} components");
}
}
// For some reason soruce models can have joints but no weights, check if that is the case
var jointAccessor = primitive.GetVertexAccessor("JOINTS_0");
if (jointAccessor != null && primitive.GetVertexAccessor("WEIGHTS_0") == null)
{
// If this occurs, give default weights
var defaultWeights = Enumerable.Repeat(Vector4.UnitX, jointAccessor.Count).ToList();
primitive.WithVertexAccessor("WEIGHTS_0", defaultWeights);
}
// Set index buffer
var startIndex = (int)drawCall.GetIntegerProperty("m_nStartIndex");
var indexCount = (int)drawCall.GetIntegerProperty("m_nIndexCount");
var indices = ReadIndices(indexBuffer, startIndex, indexCount);
primitive.WithIndicesAccessor(PrimitiveType.TRIANGLES, indices);
// Add material
var materialPath = drawCall.GetProperty <string>("m_material");
ProgressDialog.SetProgress($"Loading material: {materialPath}");
var materialResource = GuiContext.LoadFileByAnyMeansNecessary(materialPath + "_c");
if (materialResource == null)
{
continue;
}
var renderMaterial = (VMaterial)materialResource.DataBlock;
var materialNameTrimmed = Path.GetFileNameWithoutExtension(materialPath);
var bestMaterial = GenerateGLTFMaterialFromRenderMaterial(renderMaterial, model, materialNameTrimmed);
primitive.WithMaterial(bestMaterial);
}
}
return(mesh);
}
private Mesh CreateGltfMesh(string meshName, VMesh vmesh, ModelRoot model)
{
ProgressDialog.SetProgress($"Creating mesh: {meshName}");
var data = vmesh.GetData();
var vbib = vmesh.VBIB;
var mesh = model.CreateMesh(meshName);
mesh.Name = meshName;
foreach (var sceneObject in data.GetArray("m_sceneObjects"))
{
foreach (var drawCall in sceneObject.GetArray("m_drawCalls"))
{
var vertexBufferInfo = drawCall.GetArray("m_vertexBuffers")[0]; // In what situation can we have more than 1 vertex buffer per draw call?
var vertexBufferIndex = (int)vertexBufferInfo.GetIntegerProperty("m_hBuffer");
var vertexBuffer = vbib.VertexBuffers[vertexBufferIndex];
var indexBufferInfo = drawCall.GetSubCollection("m_indexBuffer");
var indexBufferIndex = (int)indexBufferInfo.GetIntegerProperty("m_hBuffer");
var indexBuffer = vbib.IndexBuffers[indexBufferIndex];
// Create one primitive per draw call
var primitive = mesh.CreatePrimitive();
// Avoid duplicate attribute names
var uniqueAttributes = vertexBuffer.Attributes.GroupBy(a => a.Name).Select(g => g.First());
// Set vertex attributes
foreach (var attribute in uniqueAttributes)
{
if (AccessorInfo.TryGetValue(attribute.Name, out var accessorInfo))
{
var buffer = ReadAttributeBuffer(vbib, vertexBuffer, attribute);
if (accessorInfo.NumComponents == 4)
{
var vectors = ToVector4Array(buffer);
primitive.WithVertexAccessor(accessorInfo.GltfAccessorName, vectors);
}
else if (attribute.Name == "NORMAL" && DrawCall.IsCompressedNormalTangent(drawCall))
{
var vectors = ToVector4Array(buffer);
var(normals, tangents) = DecompressNormalTangents(vectors);
primitive.WithVertexAccessor("NORMAL", normals);
primitive.WithVertexAccessor("TANGENT", tangents);
}
else if (accessorInfo.NumComponents == 3)
{
var vectors = ToVector3Array(buffer, true, accessorInfo.Resize);
primitive.WithVertexAccessor(accessorInfo.GltfAccessorName, vectors);
}
else if (accessorInfo.NumComponents == 2)
{
var vectors = ToVector2Array(buffer);
primitive.WithVertexAccessor(accessorInfo.GltfAccessorName, vectors);
}
}
}
// Set index buffer
var indices = ReadIndices(indexBuffer);
// For triangle primitives, the front face has to be in counter-clockwise (CCW) winding order.
for (var i = 0; i < indices.Length; i += 3)
{
var b = indices[i + 2];
indices[i + 2] = indices[i + 1];
indices[i + 1] = b;
}
primitive.WithIndicesAccessor(PrimitiveType.TRIANGLES, indices);
// Add material
var materialPath = drawCall.GetProperty <string>("m_material");
ProgressDialog.SetProgress($"Loading material: {materialPath}");
var materialResource = GuiContext.LoadFileByAnyMeansNecessary(materialPath + "_c");
if (materialResource == null)
{
continue;
}
var renderMaterial = (VMaterial)materialResource.DataBlock;
var materialNameTrimmed = Path.GetFileNameWithoutExtension(materialPath);
var bestMaterial = GenerateGLTFMaterialFromRenderMaterial(renderMaterial, model, materialNameTrimmed);
primitive.WithMaterial(bestMaterial);
}
}
return(mesh);
}
