static Memory <byte> GetAccessorBytes(Gltf gltf, GltfAccessor accessor, Memory <byte> bin)
{
var view = gltf.bufferViews[accessor.bufferView];
var byteSize = accessor.componentType.ByteSize() * accessor.type.TypeCount() * accessor.count;
return(bin.Slice(view.byteOffset, view.byteLength).Slice(accessor.byteOffset, byteSize));
}
private IEnumerable <Polygon> readIndices(GltfAccessor accessor, GltfMeshPrimitive.ModeEnum mode)
{
if (!accessor.BufferView.HasValue)
{
return(new List <Polygon>());
}
StreamIO stream = getBufferStream(accessor);
switch (mode)
{
case GltfMeshPrimitive.ModeEnum.TRIANGLES:
return(readAccessor <Triangle>(stream, accessor.ComponentType, accessor.Count / 3, 3));
case GltfMeshPrimitive.ModeEnum.POINTS:
case GltfMeshPrimitive.ModeEnum.LINES: //Works with the 3d lines, like polylines and lines
case GltfMeshPrimitive.ModeEnum.LINE_LOOP:
case GltfMeshPrimitive.ModeEnum.LINE_STRIP:
case GltfMeshPrimitive.ModeEnum.TRIANGLE_STRIP:
case GltfMeshPrimitive.ModeEnum.TRIANGLE_FAN:
return(new List <Polygon>());
default:
throw new NotImplementedException();
}
}
public static async Task <Vector4[]> GetVector4Array(this GltfAccessor accessor, bool convert = true)
{
if (accessor.type != "VEC4" || accessor.componentType == GltfComponentType.UnsignedInt)
{
return(null);
}
if (Application.isPlaying)
{
await BackgroundThread;
}
var array = new Vector4[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float maxValue);
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize * 4;
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
if (accessor.normalized)
{
maxValue = 1;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i].x = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 0);
array[i].y = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 1);
array[i].z = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 2);
array[i].w = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 3);
}
else
{
array[i].x = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 0, accessor.componentType) / maxValue;
array[i].y = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 1, accessor.componentType) / maxValue;
array[i].z = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 2, accessor.componentType) / maxValue;
array[i].w = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 3, accessor.componentType) / maxValue;
}
if (convert)
{
array[i].x *= TangentSpaceConversionScale.x;
array[i].y *= TangentSpaceConversionScale.y;
array[i].z *= TangentSpaceConversionScale.z;
array[i].w *= TangentSpaceConversionScale.w;
}
}
if (Application.isPlaying)
{
await Update;
}
return(array);
}
private StreamIO getBufferStream(GltfAccessor accessor)
{
GltfBufferView bufferView = _root.BufferViews[accessor.BufferView.Value];
GltfBuffer buffer = _root.Buffers[bufferView.Buffer];
StreamIO stream = new StreamIO(_chunk.GetBytes(0, buffer.ByteLength));
stream.Position = bufferView.ByteOffset + accessor.ByteOffset;
return(stream);
}
private GltfAccessor[] ExtractAccessors(Gltf model)
{
var noOfItems = model.Accessors != null ? model.Accessors.Length : 0;
var output = new GltfAccessor[noOfItems];
for (var i = 0; i < noOfItems; i += 1)
{
output[i] = new GltfAccessor(model.Accessors[i]);
}
return(output);
}
public static Vector3[] GetVector3Array(this GltfAccessor accessor, bool convert = true)
{
if (accessor.type != "VEC3" || accessor.componentType == GltfComponentType.UnsignedInt)
{
return(null);
}
var array = new Vector3[accessor.count];
int componentSize;
float maxValue;
GetTypeDetails(accessor.componentType, out componentSize, out maxValue);
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize * 3;
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
if (accessor.normalized)
{
maxValue = 1;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i].x = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 0);
array[i].y = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 1);
array[i].z = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 2);
}
else
{
array[i].x = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 0, accessor.componentType) / maxValue;
array[i].y = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 1, accessor.componentType) / maxValue;
array[i].z = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 2, accessor.componentType) / maxValue;
}
if (convert)
{
array[i].x *= CoordinateSpaceConversionScale.x;
array[i].y *= CoordinateSpaceConversionScale.y;
array[i].z *= CoordinateSpaceConversionScale.z;
}
}
return(array);
}
public static async Task <int[]> GetIntArray(this GltfAccessor accessor, bool flipFaces = true)
{
if (accessor.type != "SCALAR")
{
return(null);
}
if (Application.isPlaying)
{
await BackgroundThread;
}
var array = new int[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float maxValue);
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize;
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i] = (int)Mathf.Floor(BitConverter.ToSingle(bufferData, byteOffset + i * stride));
}
else
{
array[i] = (int)GetDiscreteUnsignedElement(bufferData, byteOffset + i * stride, accessor.componentType);
}
}
if (flipFaces)
{
for (int i = 0; i < array.Length; i += 3)
{
var temp = array[i];
array[i] = array[i + 2];
array[i + 2] = temp;
}
}
if (Application.isPlaying)
{
await Update;
}
return(array);
}
protected List <XYZ> readXYZ(GltfAccessor accessor)
{
if (!accessor.BufferView.HasValue)
{
return(new List <XYZ>());
}
if (accessor.Type != GltfAccessor.TypeEnum.VEC3)
{
throw new Exception();
}
return(readAccessor <XYZ>(getBufferStream(accessor), accessor.ComponentType, accessor.Count, 3));
}
public static async Task <Color[]> GetColorArray(this GltfAccessor accessor)
{
if (accessor.type != "VEC3" && accessor.type != "VEC4" || accessor.componentType == GltfComponentType.UnsignedInt)
{
return(null);
}
if (Application.isPlaying)
{
await BackgroundThread;
}
var array = new Color[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float maxValue);
bool hasAlpha = accessor.type == "VEC4";
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize * (hasAlpha ? 4 : 3);
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i].r = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 0);
array[i].g = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 1);
array[i].b = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 2);
array[i].a = hasAlpha ? BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 3) : 1f;
}
else
{
array[i].r = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 0, accessor.componentType) / maxValue;
array[i].g = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 1, accessor.componentType) / maxValue;
array[i].b = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 2, accessor.componentType) / maxValue;
array[i].a = hasAlpha ? GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 3, accessor.componentType) / maxValue : 1f;
}
}
if (Application.isPlaying)
{
await Update;
}
return(array);
}
public static async Task <Vector2[]> GetVector2Array(this GltfAccessor accessor, bool flip = true)
{
if (accessor.type != "VEC2" || accessor.componentType == GltfComponentType.UnsignedInt)
{
return(null);
}
await BackgroundThread;
var array = new Vector2[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float maxValue);
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize * 2;
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
if (accessor.normalized)
{
maxValue = 1;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i].x = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 0);
array[i].y = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 1);
}
else
{
array[i].x = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 0, accessor.componentType) / maxValue;
array[i].y = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 1, accessor.componentType) / maxValue;
}
if (flip)
{
array[i].y = 1.0f - array[i].y;
}
}
await Update;
return(array);
}
/// <summary>
/// Get Int array from accessor
/// </summary>
public static int[] GetIntArray(this GltfAccessor accessor, bool flipFaces = true)
{
if (accessor.type != scalar)
{
return(null);
}
var array = new int[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float _);
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize;
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i] = (int)Mathf.Floor(BitConverter.ToSingle(bufferData, byteOffset + i * stride));
}
else
{
array[i] = (int)GetDiscreteUnsignedElement(bufferData, byteOffset + i * stride, accessor.componentType);
}
}
if (flipFaces)
{
for (int i = 0; i < array.Length; i += 3)
{
var temp = array[i];
array[i] = array[i + 2];
array[i + 2] = temp;
}
}
return(array);
}
internal static Color[] GetColorArray(this GltfAccessor accessor)
{
if (accessor.type != vec3 && accessor.type != vec4 || accessor.componentType == GltfComponentType.UnsignedInt)
{
return(null);
}
var array = new Color[accessor.count];
GetTypeDetails(accessor.componentType, out int componentSize, out float maxValue);
bool hasAlpha = accessor.type == vec4;
var stride = accessor.BufferView.byteStride > 0 ? accessor.BufferView.byteStride : componentSize * (hasAlpha ? 4 : 3);
var byteOffset = accessor.BufferView.byteOffset;
var bufferData = accessor.BufferView.Buffer.BufferData;
if (accessor.byteOffset >= 0)
{
byteOffset += accessor.byteOffset;
}
for (int i = 0; i < accessor.count; i++)
{
if (accessor.componentType == GltfComponentType.Float)
{
array[i].r = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 0);
array[i].g = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 1);
array[i].b = BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 2);
array[i].a = hasAlpha ? BitConverter.ToSingle(bufferData, byteOffset + i * stride + componentSize * 3) : 1f;
}
else
{
array[i].r = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 0, accessor.componentType) / maxValue;
array[i].g = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 1, accessor.componentType) / maxValue;
array[i].b = GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 2, accessor.componentType) / maxValue;
array[i].a = hasAlpha ? GetDiscreteElement(bufferData, byteOffset + i * stride + componentSize * 3, accessor.componentType) / maxValue : 1f;
}
}
return(array);
}
static Int32[] GetAccessorAsIntArray(Gltf gltf, GltfAccessor a, Memory <byte> bytes)
{
if (a.componentType == GltfComponentType.UNSIGNED_INT)
{
return(MemoryMarshal.Cast <byte, int>(GetAccessorBytes(gltf, a, bytes).Span).ToArray());
}
else if (a.componentType == GltfComponentType.UNSIGNED_SHORT ||
a.componentType == GltfComponentType.SHORT)
{
var span = MemoryMarshal.Cast <byte, ushort>(GetAccessorBytes(gltf, a, bytes).Span);
var array = new int[span.Length];
for (int i = 0; i < span.Length; ++i)
{
array[i] = span[i];
}
return(array);
}
else
{
throw new Exception();
}
}
public IEnumerator TestGltfCustomAttributesData()
{
// Load glTF
string path = AssetDatabase.GUIDToAssetPath(CubeCustomAttrGuid);
var task = GltfUtility.ImportGltfObjectFromPathAsync(path);
yield return(WaitForTask(task));
GltfObject gltfObject = task.Result;
yield return(null);
// Check for custom vertex data is a list of 10s
gltfObject.meshes[0].primitives[0].Attributes.TryGetValue("_CUSTOM_ATTR", out var customAttrIdx);
GltfAccessor accessor = gltfObject.GetAccessor(customAttrIdx);
var intArray = accessor.GetIntArray(false);
foreach (var item in intArray)
{
Assert.AreEqual(10, item);
}
}
private static GltfInterleavedOperation CreateCopyOp(List <GltfInterleavedOperation> destination, GltfAccessor selected, GltfBufferView[] bufferViews)
{
if (!selected.BufferView.HasValue)
{
throw new InvalidOperationException("unable to locate bufferview");
}
var view = bufferViews[selected.BufferView.Value];
var op = new GltfInterleavedOperation
{
BufferIndex = view.BufferIndex,
Count = selected.ElementCount,
SrcOffset = (ulong)(view.BufferOffset + selected.ViewOffset),
TotalSize = (uint)(selected.ElementCount * selected.NoOfComponents * selected.ElementByteSize),
};
op.ByteStride =
(view.ByteStride.HasValue)
? (uint)view.ByteStride.Value
: selected.NoOfComponents * selected.ElementByteSize;
destination.Add(op);
return(op);
}
private static async Task <Mesh> ConstructMeshPrimitiveAsync(GltfObject gltfObject, GltfMeshPrimitive meshPrimitive)
{
if (Application.isPlaying)
{
await BackgroundThread;
}
GltfAccessor positionAccessor = null;
GltfAccessor normalsAccessor = null;
GltfAccessor textCoord0Accessor = null;
GltfAccessor textCoord1Accessor = null;
GltfAccessor textCoord2Accessor = null;
GltfAccessor textCoord3Accessor = null;
GltfAccessor colorAccessor = null;
GltfAccessor indicesAccessor = null;
GltfAccessor tangentAccessor = null;
GltfAccessor weight0Accessor = null;
GltfAccessor joint0Accessor = null;
int vertexCount = 0;
if (meshPrimitive.Attributes.POSITION >= 0)
{
positionAccessor = gltfObject.accessors[meshPrimitive.Attributes.POSITION];
positionAccessor.BufferView = gltfObject.bufferViews[positionAccessor.bufferView];
positionAccessor.BufferView.Buffer = gltfObject.buffers[positionAccessor.BufferView.buffer];
vertexCount = positionAccessor.count;
}
if (meshPrimitive.Attributes.NORMAL >= 0)
{
normalsAccessor = gltfObject.accessors[meshPrimitive.Attributes.NORMAL];
normalsAccessor.BufferView = gltfObject.bufferViews[normalsAccessor.bufferView];
normalsAccessor.BufferView.Buffer = gltfObject.buffers[normalsAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_0 >= 0)
{
textCoord0Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_0];
textCoord0Accessor.BufferView = gltfObject.bufferViews[textCoord0Accessor.bufferView];
textCoord0Accessor.BufferView.Buffer = gltfObject.buffers[textCoord0Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_1 >= 0)
{
textCoord1Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_1];
textCoord1Accessor.BufferView = gltfObject.bufferViews[textCoord1Accessor.bufferView];
textCoord1Accessor.BufferView.Buffer = gltfObject.buffers[textCoord1Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_2 >= 0)
{
textCoord2Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_2];
textCoord2Accessor.BufferView = gltfObject.bufferViews[textCoord2Accessor.bufferView];
textCoord2Accessor.BufferView.Buffer = gltfObject.buffers[textCoord2Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_3 >= 0)
{
textCoord3Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_3];
textCoord3Accessor.BufferView = gltfObject.bufferViews[textCoord3Accessor.bufferView];
textCoord3Accessor.BufferView.Buffer = gltfObject.buffers[textCoord3Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.COLOR_0 >= 0)
{
colorAccessor = gltfObject.accessors[meshPrimitive.Attributes.COLOR_0];
colorAccessor.BufferView = gltfObject.bufferViews[colorAccessor.bufferView];
colorAccessor.BufferView.Buffer = gltfObject.buffers[colorAccessor.BufferView.buffer];
}
if (meshPrimitive.indices >= 0)
{
indicesAccessor = gltfObject.accessors[meshPrimitive.indices];
indicesAccessor.BufferView = gltfObject.bufferViews[indicesAccessor.bufferView];
indicesAccessor.BufferView.Buffer = gltfObject.buffers[indicesAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TANGENT >= 0)
{
tangentAccessor = gltfObject.accessors[meshPrimitive.Attributes.TANGENT];
tangentAccessor.BufferView = gltfObject.bufferViews[tangentAccessor.bufferView];
tangentAccessor.BufferView.Buffer = gltfObject.buffers[tangentAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.WEIGHTS_0 >= 0)
{
weight0Accessor = gltfObject.accessors[meshPrimitive.Attributes.WEIGHTS_0];
weight0Accessor.BufferView = gltfObject.bufferViews[weight0Accessor.bufferView];
weight0Accessor.BufferView.Buffer = gltfObject.buffers[weight0Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.JOINTS_0 >= 0)
{
joint0Accessor = gltfObject.accessors[meshPrimitive.Attributes.JOINTS_0];
joint0Accessor.BufferView = gltfObject.bufferViews[joint0Accessor.bufferView];
joint0Accessor.BufferView.Buffer = gltfObject.buffers[joint0Accessor.BufferView.buffer];
}
if (Application.isPlaying)
{
await Update;
}
var mesh = new Mesh
{
indexFormat = vertexCount > 65535 ? IndexFormat.UInt32 : IndexFormat.UInt16,
};
if (positionAccessor != null)
{
mesh.vertices = await positionAccessor.GetVector3Array();
}
if (normalsAccessor != null)
{
mesh.normals = await normalsAccessor.GetVector3Array();
}
if (textCoord0Accessor != null)
{
mesh.uv = await textCoord0Accessor.GetVector2Array();
}
if (textCoord1Accessor != null)
{
mesh.uv2 = await textCoord1Accessor.GetVector2Array();
}
if (textCoord2Accessor != null)
{
mesh.uv3 = await textCoord2Accessor.GetVector2Array();
}
if (textCoord3Accessor != null)
{
mesh.uv4 = await textCoord3Accessor.GetVector2Array();
}
if (colorAccessor != null)
{
mesh.colors = await colorAccessor.GetColorArray();
}
if (indicesAccessor != null)
{
mesh.triangles = await indicesAccessor.GetIntArray();
}
if (tangentAccessor != null)
{
mesh.tangents = await tangentAccessor.GetVector4Array();
}
if (weight0Accessor != null && joint0Accessor != null)
{
mesh.boneWeights = CreateBoneWeightArray(await joint0Accessor.GetVector4Array(false), await weight0Accessor.GetVector4Array(false), vertexCount);
}
mesh.RecalculateBounds();
meshPrimitive.SubMesh = mesh;
return(mesh);
}
private static async Task <Mesh> ConstructMeshPrimitiveAsync(GltfObject gltfObject, GltfMeshPrimitive meshPrimitive)
{
if (gltfObject.UseBackgroundThread)
{
await BackgroundThread;
}
GltfAccessor positionAccessor = null;
GltfAccessor normalsAccessor = null;
GltfAccessor textCoord0Accessor = null;
GltfAccessor textCoord1Accessor = null;
GltfAccessor textCoord2Accessor = null;
GltfAccessor textCoord3Accessor = null;
GltfAccessor colorAccessor = null;
GltfAccessor indicesAccessor = null;
GltfAccessor tangentAccessor = null;
GltfAccessor weight0Accessor = null;
GltfAccessor joint0Accessor = null;
int vertexCount = 0;
positionAccessor = gltfObject.GetAccessor(meshPrimitive.Attributes.POSITION);
if (positionAccessor != null)
{
vertexCount = positionAccessor.count;
}
normalsAccessor = gltfObject.GetAccessor(meshPrimitive.Attributes.NORMAL);
textCoord0Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.TEXCOORD_0);
textCoord1Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.TEXCOORD_1);
textCoord2Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.TEXCOORD_2);
textCoord3Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.TEXCOORD_3);
colorAccessor = gltfObject.GetAccessor(meshPrimitive.Attributes.COLOR_0);
indicesAccessor = gltfObject.GetAccessor(meshPrimitive.indices);
tangentAccessor = gltfObject.GetAccessor(meshPrimitive.Attributes.TANGENT);
weight0Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.WEIGHTS_0);
joint0Accessor = gltfObject.GetAccessor(meshPrimitive.Attributes.JOINTS_0);
if (gltfObject.UseBackgroundThread)
{
await Update;
}
var mesh = new Mesh
{
indexFormat = vertexCount > UInt16.MaxValue ? IndexFormat.UInt32 : IndexFormat.UInt16,
};
if (positionAccessor != null)
{
mesh.vertices = positionAccessor.GetVector3Array();
}
if (normalsAccessor != null)
{
mesh.normals = normalsAccessor.GetVector3Array();
}
if (textCoord0Accessor != null)
{
mesh.uv = textCoord0Accessor.GetVector2Array();
}
if (textCoord1Accessor != null)
{
mesh.uv2 = textCoord1Accessor.GetVector2Array();
}
if (textCoord2Accessor != null)
{
mesh.uv3 = textCoord2Accessor.GetVector2Array();
}
if (textCoord3Accessor != null)
{
mesh.uv4 = textCoord3Accessor.GetVector2Array();
}
if (colorAccessor != null)
{
mesh.colors = colorAccessor.GetColorArray();
}
if (indicesAccessor != null)
{
mesh.triangles = indicesAccessor.GetIntArray();
}
if (tangentAccessor != null)
{
mesh.tangents = tangentAccessor.GetVector4Array();
}
if (weight0Accessor != null && joint0Accessor != null)
{
mesh.boneWeights = CreateBoneWeightArray(joint0Accessor.GetVector4Array(false), weight0Accessor.GetVector4Array(false), vertexCount);
}
mesh.RecalculateBounds();
meshPrimitive.SubMesh = mesh;
return(mesh);
}
private static Mesh ConstructMeshPrimitive(GltfObject gltfObject, GltfMeshPrimitive meshPrimitive)
{
GltfAccessor positionAccessor = null;
GltfAccessor normalsAccessor = null;
GltfAccessor textCoord0Accessor = null;
GltfAccessor textCoord1Accessor = null;
GltfAccessor textCoord2Accessor = null;
GltfAccessor textCoord3Accessor = null;
GltfAccessor colorAccessor = null;
GltfAccessor indicesAccessor = null;
GltfAccessor tangentAccessor = null;
GltfAccessor weight0Accessor = null;
GltfAccessor joint0Accessor = null;
int vertexCount = 0;
if (meshPrimitive.Attributes.POSITION >= 0)
{
positionAccessor = gltfObject.accessors[meshPrimitive.Attributes.POSITION];
positionAccessor.BufferView = gltfObject.bufferViews[positionAccessor.bufferView];
positionAccessor.BufferView.Buffer = gltfObject.buffers[positionAccessor.BufferView.buffer];
vertexCount = positionAccessor.count;
}
if (meshPrimitive.Attributes.NORMAL >= 0)
{
normalsAccessor = gltfObject.accessors[meshPrimitive.Attributes.NORMAL];
normalsAccessor.BufferView = gltfObject.bufferViews[normalsAccessor.bufferView];
normalsAccessor.BufferView.Buffer = gltfObject.buffers[normalsAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_0 >= 0)
{
textCoord0Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_0];
textCoord0Accessor.BufferView = gltfObject.bufferViews[textCoord0Accessor.bufferView];
textCoord0Accessor.BufferView.Buffer = gltfObject.buffers[textCoord0Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_1 >= 0)
{
textCoord1Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_1];
textCoord1Accessor.BufferView = gltfObject.bufferViews[textCoord1Accessor.bufferView];
textCoord1Accessor.BufferView.Buffer = gltfObject.buffers[textCoord1Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_2 >= 0)
{
textCoord2Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_2];
textCoord2Accessor.BufferView = gltfObject.bufferViews[textCoord2Accessor.bufferView];
textCoord2Accessor.BufferView.Buffer = gltfObject.buffers[textCoord2Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TEXCOORD_3 >= 0)
{
textCoord3Accessor = gltfObject.accessors[meshPrimitive.Attributes.TEXCOORD_3];
textCoord3Accessor.BufferView = gltfObject.bufferViews[textCoord3Accessor.bufferView];
textCoord3Accessor.BufferView.Buffer = gltfObject.buffers[textCoord3Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.COLOR_0 >= 0)
{
colorAccessor = gltfObject.accessors[meshPrimitive.Attributes.COLOR_0];
colorAccessor.BufferView = gltfObject.bufferViews[colorAccessor.bufferView];
colorAccessor.BufferView.Buffer = gltfObject.buffers[colorAccessor.BufferView.buffer];
}
if (meshPrimitive.indices >= 0)
{
indicesAccessor = gltfObject.accessors[meshPrimitive.indices];
indicesAccessor.BufferView = gltfObject.bufferViews[indicesAccessor.bufferView];
indicesAccessor.BufferView.Buffer = gltfObject.buffers[indicesAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.TANGENT >= 0)
{
tangentAccessor = gltfObject.accessors[meshPrimitive.Attributes.TANGENT];
tangentAccessor.BufferView = gltfObject.bufferViews[tangentAccessor.bufferView];
tangentAccessor.BufferView.Buffer = gltfObject.buffers[tangentAccessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.WEIGHTS_0 >= 0)
{
weight0Accessor = gltfObject.accessors[meshPrimitive.Attributes.WEIGHTS_0];
weight0Accessor.BufferView = gltfObject.bufferViews[weight0Accessor.bufferView];
weight0Accessor.BufferView.Buffer = gltfObject.buffers[weight0Accessor.BufferView.buffer];
}
if (meshPrimitive.Attributes.JOINTS_0 >= 0)
{
joint0Accessor = gltfObject.accessors[meshPrimitive.Attributes.JOINTS_0];
joint0Accessor.BufferView = gltfObject.bufferViews[joint0Accessor.bufferView];
joint0Accessor.BufferView.Buffer = gltfObject.buffers[joint0Accessor.BufferView.buffer];
}
var mesh = new Mesh
{
indexFormat = vertexCount > 65535 ? IndexFormat.UInt32 : IndexFormat.UInt16,
vertices = positionAccessor?.GetVector3Array(),
normals = normalsAccessor?.GetVector3Array(),
uv = textCoord0Accessor?.GetVector2Array(),
uv2 = textCoord1Accessor?.GetVector2Array(),
uv3 = textCoord2Accessor?.GetVector2Array(),
uv4 = textCoord3Accessor?.GetVector2Array(),
colors = colorAccessor?.GetColorArray(),
triangles = indicesAccessor?.GetIntArray(),
tangents = tangentAccessor?.GetVector4Array()
};
if (weight0Accessor != null && joint0Accessor != null)
{
mesh.boneWeights = CreateBoneWeightArray(joint0Accessor.GetVector4Array(false), weight0Accessor.GetVector4Array(false), vertexCount);
}
mesh.RecalculateBounds();
return(mesh);
}
