private int AddCoordinates(List <float> values)
{
// buffer preparation
int startingBufferPoisition = _coordinatesBuffer.Count;
_coordinatesBuffer.Capacity = startingBufferPoisition + values.Count * sizeof(float);
// prepare to evaluate min max:
float[] min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue };
float[] max = new float[] { float.MinValue, float.MinValue, float.MinValue };
int i = 0;
foreach (var value in values)
{
// evaluate min/max
if (value < min[i])
{
min[i] = value;
}
if (value > max[i])
{
max[i] = value;
}
i++;
if (i > 2)
{
i = 0;
}
// populate the buffer (previously expanded)
_coordinatesBuffer.AddRange(BitConverter.GetBytes(value));
}
var coordAccessor = new gltf.Accessor()
{
BufferView = 1,
ByteOffset = startingBufferPoisition,
ComponentType = gltf.Accessor.ComponentTypeEnum.FLOAT,
Normalized = false,
Count = values.Count / 3,
Type = gltf.Accessor.TypeEnum.VEC3,
Min = min,
Max = max
};
// index to return
var ret = _accessors.Count;
_accessors.Add(coordAccessor);
return(ret);
}
private static byte[] readBuffer(string rootPath, Gltf.Gltf model, Gltf.Accessor accessor)
{
var bufferView = model.BufferViews[(int)accessor.BufferView];
var buffer = model.Buffers[bufferView.Buffer];
using (var fs = new FileStream(Path.Combine(rootPath, buffer.Uri), FileMode.Open))
using (var reader = new BinaryReader(fs))
{
var byteArray = new byte[bufferView.ByteLength];
reader.BaseStream.Seek(bufferView.ByteOffset, SeekOrigin.Begin);
return(reader.ReadBytes(bufferView.ByteLength));
}
}
private int AddIndices(List <int> indices)
{
// evaulate min max
//
var MinMaxV = indices.Aggregate(new
{
MinV = int.MaxValue,
MaxV = int.MinValue
},
(accumulator, o) => new
{
MinV = Math.Min(o, accumulator.MinV),
MaxV = Math.Max(o, accumulator.MaxV)
});
gltf.Accessor.ComponentTypeEnum ct = gltf.Accessor.ComponentTypeEnum.BYTE;
// depending on the count of positions and normals, we determine the index type
//
Func <int, byte[]> ToBits;
var size = 0;
if (!Prevent8bitIndices && MinMaxV.MaxV <= Math.Pow(2, 8))
{
ct = gltf.Accessor.ComponentTypeEnum.UNSIGNED_BYTE;
size = sizeof(byte);
ToBits = x => new byte[] { (byte)x };
}
else if (MinMaxV.MaxV <= Math.Pow(2, 16))
{
ct = gltf.Accessor.ComponentTypeEnum.UNSIGNED_SHORT;
size = sizeof(short);
ToBits = x => BitConverter.GetBytes((short)x);
}
else
{
ct = gltf.Accessor.ComponentTypeEnum.UNSIGNED_INT;
size = sizeof(int);
ToBits = x => BitConverter.GetBytes((int)x);
}
// the offset position needs to be a multiple of the size
// (this is from a warning we received in beta testing)
// so we inject some padding when needed
//
var padding = _indicesBuffer.Count % size;
for (int i = 0; i < padding; i++)
{
_indicesBuffer.Add(0);
}
var indAccessor = new gltf.Accessor
{
BufferView = 0,
ComponentType = ct,
ByteOffset = _indicesBuffer.Count,
Normalized = false,
Type = gltf.Accessor.TypeEnum.SCALAR,
Count = indices.Count,
Min = new float[] { MinMaxV.MinV },
Max = new float[] { MinMaxV.MaxV }
};
var IndexSize = indices.Count * size;
List <byte> indicesBufferData = new List <byte>(IndexSize);
foreach (var index in indices)
{
var lst = ToBits(index);
indicesBufferData.AddRange(lst);
}
_indicesBuffer.AddRange(indicesBufferData);
var thisIndex = _accessors.Count;
_accessors.Add(indAccessor);
return(thisIndex);
}
//TODO: some buffer data are reused between primitives, and I duplicate the datas
//buffers must be constructed without duplications
public Mesh[] LoadMeshes<TVertex> (VkIndexType indexType, Buffer vbo, ulong vboOffset, Buffer ibo, ulong iboOffset) {
ulong vCount, iCount;
VkIndexType idxType;
GetVertexCount (out vCount, out iCount, out idxType);
int vertexByteSize = Marshal.SizeOf<TVertex> ();
ulong vertSize = vCount * (ulong)vertexByteSize;
ulong idxSize = iCount * (indexType == VkIndexType.Uint16 ? 2ul : 4ul);
ulong size = vertSize + idxSize;
int vertexCount = 0, indexCount = 0;
int autoNamedMesh = 1;
meshes = new List<Mesh> ();
using (HostBuffer stagging = new HostBuffer (dev, VkBufferUsageFlags.TransferSrc, size)) {
stagging.Map ();
unsafe {
Span<byte> stagVertPtrInit = new Span<byte>(stagging.MappedData.ToPointer (), (int)vertSize);
Span<byte> stagIdxPtrInit = new Span<byte>((byte*)stagging.MappedData.ToPointer() + vertSize, (int)idxSize);
Span<byte> stagVertPtr = stagVertPtrInit, stagIdxPtr = stagIdxPtrInit;
foreach (GL.Mesh mesh in gltf.Meshes) {
string meshName = mesh.Name;
if (string.IsNullOrEmpty (meshName)) {
meshName = "mesh_" + autoNamedMesh.ToString ();
autoNamedMesh++;
}
Mesh m = new Mesh { Name = meshName };
foreach (GL.MeshPrimitive p in mesh.Primitives) {
GL.Accessor AccPos = null, AccNorm = null, AccUv = null, AccUv1 = null;
int accessorIdx;
if (p.Attributes.TryGetValue ("POSITION", out accessorIdx)) {
AccPos = gltf.Accessors[accessorIdx];
ensureBufferIsLoaded (gltf.BufferViews[(int)AccPos.BufferView].Buffer);
}
if (p.Attributes.TryGetValue ("NORMAL", out accessorIdx)) {
AccNorm = gltf.Accessors[accessorIdx];
ensureBufferIsLoaded (gltf.BufferViews[(int)AccNorm.BufferView].Buffer);
}
if (p.Attributes.TryGetValue ("TEXCOORD_0", out accessorIdx)) {
AccUv = gltf.Accessors[accessorIdx];
ensureBufferIsLoaded (gltf.BufferViews[(int)AccUv.BufferView].Buffer);
}
if (p.Attributes.TryGetValue ("TEXCOORD_1", out accessorIdx)) {
AccUv1 = gltf.Accessors[accessorIdx];
ensureBufferIsLoaded (gltf.BufferViews[(int)AccUv1.BufferView].Buffer);
}
Primitive prim = new Primitive {
indexBase = (uint)indexCount,
vertexBase = vertexCount,
vertexCount = (uint)AccPos.Count,
material = (uint)(p.Material ?? 0)
};
prim.bb.min.ImportFloatArray (AccPos.Min);
prim.bb.max.ImportFloatArray (AccPos.Max);
prim.bb.isValid = true;
//Interleaving vertices
Span<byte> inPosPtr = Span<byte>.Empty, inNormPtr = Span<byte>.Empty, inUvPtr = Span<byte>.Empty, inUv1Ptr = Span<byte>.Empty;
GL.BufferView bv = gltf.BufferViews[(int)AccPos.BufferView];
inPosPtr = loadedBuffers[bv.Buffer].Span.Slice (AccPos.ByteOffset + bv.ByteOffset);
if (AccNorm != null) {
bv = gltf.BufferViews[(int)AccNorm.BufferView];
inNormPtr = loadedBuffers[bv.Buffer].Span.Slice (AccNorm.ByteOffset + bv.ByteOffset);
}
if (AccUv != null) {
bv = gltf.BufferViews[(int)AccUv.BufferView];
inUvPtr = loadedBuffers[bv.Buffer].Span.Slice (AccUv.ByteOffset + bv.ByteOffset);
}
if (AccUv1 != null) {
bv = gltf.BufferViews[(int)AccUv1.BufferView];
inUv1Ptr = loadedBuffers[bv.Buffer].Span.Slice (AccUv1.ByteOffset + bv.ByteOffset);
}
//TODO: use vertex attributes scan for copying data if they exists
for (int j = 0; j < prim.vertexCount; j++) {
inPosPtr.Slice (0, 12).CopyTo (stagVertPtr);
inPosPtr = inPosPtr.Slice(12);
if (!inNormPtr.IsEmpty) {
inNormPtr.Slice (0, 12).CopyTo (stagVertPtr.Slice (12));
inNormPtr = inNormPtr.Slice (12);
}
if (inUvPtr != null) {
inUvPtr.Slice (0, 8).CopyTo (stagVertPtr.Slice (24));
inUvPtr = inUvPtr.Slice (8);
}
if (inUv1Ptr != null) {
inUv1Ptr.Slice (0, 8).CopyTo (stagVertPtr.Slice (32));
inUv1Ptr = inUvPtr.Slice (8);
}
stagVertPtr = stagVertPtr.Slice (vertexByteSize);
}
/*Span<byte> s = stagVertPtrInit;
for (int i = 0; i < s.Length; i++)
Console.Write (s[i].ToString ("X2") + (i % 32 == 0 ? "\n" : " "));*/
//indices loading
if (p.Indices != null) {
GL.Accessor acc = gltf.Accessors[(int)p.Indices];
bv = gltf.BufferViews[(int)acc.BufferView];
Span<byte> inIdxPtr = loadedBuffers[bv.Buffer].Span.Slice (acc.ByteOffset + bv.ByteOffset);
//TODO:double check this, I dont seems to increment stag pointer
if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_SHORT) {
if (indexType == VkIndexType.Uint16) {
inIdxPtr.Slice (0, acc.Count * 2).CopyTo (stagIdxPtr);
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 2);
} else {
Span<uint> usPtr = MemoryMarshal.Cast<byte, uint> (stagIdxPtr);
Span<ushort> inPtr = MemoryMarshal.Cast < byte, ushort> (inIdxPtr);
for (int i = 0; i < acc.Count; i++)
usPtr[i] = inPtr[i];
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 4);
}
} else if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_INT) {
if (indexType == VkIndexType.Uint32) {
inIdxPtr.Slice (0, acc.Count * 4).CopyTo (stagIdxPtr);
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 4);
} else {
Span<ushort> usPtr = MemoryMarshal.Cast<byte, ushort> (stagIdxPtr);
Span<uint> inPtr = MemoryMarshal.Cast<byte, uint> (inIdxPtr);
for (int i = 0; i < acc.Count; i++)
usPtr[i] = (ushort)inPtr[i];
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 2);
}
} else if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_BYTE) {
//convert
if (indexType == VkIndexType.Uint16) {
Span<ushort> usPtr = MemoryMarshal.Cast<byte, ushort> (stagIdxPtr);
for (int i = 0; i < acc.Count; i++)
usPtr[i] = (ushort)inIdxPtr[i];
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 2);
} else {
Span<uint> usPtr = MemoryMarshal.Cast<byte, uint> (stagIdxPtr);
for (int i = 0; i < acc.Count; i++)
usPtr[i] = (uint)inIdxPtr[i];
stagIdxPtr = stagIdxPtr.Slice (acc.Count * 4);
}
} else
throw new NotImplementedException ();
prim.indexCount = (uint)acc.Count;
indexCount += acc.Count;
}
m.AddPrimitive (prim);
vertexCount += AccPos.Count;
}
meshes.Add (m);
}
/*ReadOnlySpan<byte> tmp = new ReadOnlySpan<byte> (stagging.MappedData.ToPointer (), (int)size);
Memory<byte> mtmp = new Memory<byte> (tmp.ToArray());
mtmp.Dump();*/
}
stagging.Unmap ();
PrimaryCommandBuffer cmd = cmdPool.AllocateCommandBuffer ();
cmd.Start (VkCommandBufferUsageFlags.OneTimeSubmit);
stagging.CopyTo (cmd, vbo, vertSize, 0, vboOffset);
if (iCount>0)
stagging.CopyTo (cmd, ibo, idxSize, vertSize, iboOffset);
cmd.End ();
transferQ.Submit (cmd);
dev.WaitIdle ();
cmd.Free ();
}
return meshes.ToArray ();
}
//TODO: some buffer data are reused between primitives, and I duplicate the datas
//buffers must be constructed without duplications
public Mesh[] LoadMeshes <TVertex> (VkIndexType indexType, Buffer vbo, ulong vboOffset, Buffer ibo, ulong iboOffset)
{
ulong vCount, iCount;
VkIndexType idxType;
GetVertexCount(out vCount, out iCount, out idxType);
int vertexByteSize = Marshal.SizeOf <TVertex> ();
ulong vertSize = vCount * (ulong)vertexByteSize;
ulong idxSize = iCount * (indexType == VkIndexType.Uint16 ? 2ul : 4ul);
ulong size = vertSize + idxSize;
int vertexCount = 0, indexCount = 0;
int autoNamedMesh = 1;
meshes = new List <Mesh> ();
using (HostBuffer stagging = new HostBuffer(dev, VkBufferUsageFlags.TransferSrc, size)) {
stagging.Map();
unsafe {
byte *stagVertPtrInit = (byte *)stagging.MappedData.ToPointer();
byte *stagIdxPtrInit = (byte *)(stagging.MappedData.ToPointer()) + vertSize;
byte *stagVertPtr = stagVertPtrInit;
byte *stagIdxPtr = stagIdxPtrInit;
foreach (GL.Mesh mesh in gltf.Meshes)
{
string meshName = mesh.Name;
if (string.IsNullOrEmpty(meshName))
{
meshName = "mesh_" + autoNamedMesh.ToString();
autoNamedMesh++;
}
Mesh m = new Mesh {
Name = meshName
};
foreach (GL.MeshPrimitive p in mesh.Primitives)
{
GL.Accessor AccPos = null, AccNorm = null, AccUv = null, AccUv1 = null;
int accessorIdx;
if (p.Attributes.TryGetValue("POSITION", out accessorIdx))
{
AccPos = gltf.Accessors[accessorIdx];
EnsureBufferIsLoaded(gltf.BufferViews[(int)AccPos.BufferView].Buffer);
}
if (p.Attributes.TryGetValue("NORMAL", out accessorIdx))
{
AccNorm = gltf.Accessors[accessorIdx];
EnsureBufferIsLoaded(gltf.BufferViews[(int)AccNorm.BufferView].Buffer);
}
if (p.Attributes.TryGetValue("TEXCOORD_0", out accessorIdx))
{
AccUv = gltf.Accessors[accessorIdx];
EnsureBufferIsLoaded(gltf.BufferViews[(int)AccUv.BufferView].Buffer);
}
if (p.Attributes.TryGetValue("TEXCOORD_1", out accessorIdx))
{
AccUv1 = gltf.Accessors[accessorIdx];
EnsureBufferIsLoaded(gltf.BufferViews[(int)AccUv1.BufferView].Buffer);
}
Primitive prim = new Primitive {
indexBase = (uint)indexCount,
vertexBase = vertexCount,
vertexCount = (uint)AccPos.Count,
material = (uint)(p.Material ?? 0)
};
prim.bb.min.ImportFloatArray(AccPos.Min);
prim.bb.max.ImportFloatArray(AccPos.Max);
prim.bb.isValid = true;
//Interleaving vertices
byte *inPosPtr = null, inNormPtr = null, inUvPtr = null, inUv1Ptr = null;
GL.BufferView bv = gltf.BufferViews[(int)AccPos.BufferView];
inPosPtr = (byte *)bufferHandles[bv.Buffer].AddrOfPinnedObject().ToPointer();
inPosPtr += AccPos.ByteOffset + bv.ByteOffset;
if (AccNorm != null)
{
bv = gltf.BufferViews[(int)AccNorm.BufferView];
inNormPtr = (byte *)bufferHandles[bv.Buffer].AddrOfPinnedObject().ToPointer();
inNormPtr += AccNorm.ByteOffset + bv.ByteOffset;
}
if (AccUv != null)
{
bv = gltf.BufferViews[(int)AccUv.BufferView];
inUvPtr = (byte *)bufferHandles[bv.Buffer].AddrOfPinnedObject().ToPointer();
inUvPtr += AccUv.ByteOffset + bv.ByteOffset;
}
if (AccUv1 != null)
{
bv = gltf.BufferViews[(int)AccUv1.BufferView];
inUv1Ptr = (byte *)bufferHandles[bv.Buffer].AddrOfPinnedObject().ToPointer();
inUv1Ptr += AccUv1.ByteOffset + bv.ByteOffset;
}
for (int j = 0; j < prim.vertexCount; j++)
{
System.Buffer.MemoryCopy(inPosPtr, stagVertPtr, 12, 12);
inPosPtr += 12;
if (inNormPtr != null)
{
System.Buffer.MemoryCopy(inNormPtr, stagVertPtr + 12, 12, 12);
inNormPtr += 12;
}
if (inUvPtr != null)
{
System.Buffer.MemoryCopy(inUvPtr, stagVertPtr + 24, 8, 8);
inUvPtr += 8;
}
if (inUv1Ptr != null)
{
System.Buffer.MemoryCopy(inUv1Ptr, stagVertPtr + 32, 8, 8);
inUv1Ptr += 8;
}
stagVertPtr += vertexByteSize;
}
//indices loading
if (p.Indices != null)
{
GL.Accessor acc = gltf.Accessors[(int)p.Indices];
bv = gltf.BufferViews[(int)acc.BufferView];
byte *inIdxPtr = (byte *)bufferHandles[bv.Buffer].AddrOfPinnedObject().ToPointer();
inIdxPtr += acc.ByteOffset + bv.ByteOffset;
//TODO:double check this, I dont seems to increment stag pointer
if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_SHORT)
{
if (indexType == VkIndexType.Uint16)
{
System.Buffer.MemoryCopy(inIdxPtr, stagIdxPtr, (long)acc.Count * 2, (long)acc.Count * 2);
stagIdxPtr += (long)acc.Count * 2;
}
else
{
uint * usPtr = (uint *)stagIdxPtr;
ushort *inPtr = (ushort *)inIdxPtr;
for (int i = 0; i < acc.Count; i++)
{
usPtr[i] = inPtr[i];
}
stagIdxPtr += (long)acc.Count * 4;
}
}
else if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_INT)
{
if (indexType == VkIndexType.Uint32)
{
System.Buffer.MemoryCopy(inIdxPtr, stagIdxPtr, (long)acc.Count * 4, (long)acc.Count * 4);
stagIdxPtr += (long)acc.Count * 4;
}
else
{
ushort *usPtr = (ushort *)stagIdxPtr;
uint * inPtr = (uint *)inIdxPtr;
for (int i = 0; i < acc.Count; i++)
{
usPtr[i] = (ushort)inPtr[i];
}
stagIdxPtr += (long)acc.Count * 2;
}
}
else if (acc.ComponentType == GL.Accessor.ComponentTypeEnum.UNSIGNED_BYTE)
{
//convert
if (indexType == VkIndexType.Uint16)
{
ushort *usPtr = (ushort *)stagIdxPtr;
for (int i = 0; i < acc.Count; i++)
{
usPtr[i] = (ushort)inIdxPtr[i];
}
stagIdxPtr += (long)acc.Count * 2;
}
else
{
uint *usPtr = (uint *)stagIdxPtr;
for (int i = 0; i < acc.Count; i++)
{
usPtr[i] = (uint)inIdxPtr[i];
}
stagIdxPtr += (long)acc.Count * 4;
}
}
else
{
throw new NotImplementedException();
}
prim.indexCount = (uint)acc.Count;
indexCount += acc.Count;
}
m.AddPrimitive(prim);
vertexCount += AccPos.Count;
}
meshes.Add(m);
}
}
stagging.Unmap();
CommandBuffer cmd = cmdPool.AllocateCommandBuffer();
cmd.Start(VkCommandBufferUsageFlags.OneTimeSubmit);
stagging.CopyTo(cmd, vbo, vertSize, 0, vboOffset);
if (iCount > 0)
{
stagging.CopyTo(cmd, ibo, idxSize, vertSize, iboOffset);
}
cmd.End();
transferQ.Submit(cmd);
dev.WaitIdle();
cmd.Free();
}
return(meshes.ToArray());
}