public void SetStreamedVertices(IPrimitiveReader <TMaterial> srcPrim, PackedEncoding vertexEncoding)
{
Guard.NotNull(srcPrim, nameof(srcPrim));
var attributeNames = VertexTypes.VertexUtils
.GetVertexAttributes(srcPrim.Vertices[0], srcPrim.Vertices.Count, vertexEncoding)
.Select(item => item.Name)
.ToList();
var vAccessors = new List <MACCESSOR>();
GuardAll.MustBeEqualTo(vAccessors.Select(item => item.Attribute.ByteOffset), 0, nameof(vAccessors));
GuardAll.MustBeEqualTo(vAccessors.Select(item => item.Attribute.ByteStride), 0, nameof(vAccessors));
foreach (var an in attributeNames)
{
var vAccessor = VertexTypes.VertexUtils.CreateVertexMemoryAccessor(srcPrim.Vertices, an, vertexEncoding);
if (vAccessor == null)
{
continue;
}
vAccessors.Add(vAccessor);
}
_VertexAccessors = vAccessors.ToArray();
MACCESSOR.SanitizeVertexAttributes(_VertexAccessors);
}
public void SetMorphTargets(IPrimitiveReader <TMaterial> srcPrim, PackedEncoding vertexEncodings, ISet <string> morphTargetAttributes)
{
bool hasPositions = _VertexAccessors.Any(item => item.Attribute.Name == "POSITION");
bool hasNormals = _VertexAccessors.Any(item => item.Attribute.Name == "NORMAL");
bool hasTangents = _VertexAccessors.Any(item => item.Attribute.Name == "TANGENT");
bool hasColors0 = _VertexAccessors.Any(item => item.Attribute.Name == "COLOR_0");
bool hasColors1 = _VertexAccessors.Any(item => item.Attribute.Name == "COLOR_1");
bool hasTexCoords0 = _VertexAccessors.Any(item => item.Attribute.Name == "TEXCOORD_0");
bool hasTexCoords1 = _VertexAccessors.Any(item => item.Attribute.Name == "TEXCOORD_1");
bool hasTexCoords2 = _VertexAccessors.Any(item => item.Attribute.Name == "TEXCOORD_2");
bool hasTexCoords3 = _VertexAccessors.Any(item => item.Attribute.Name == "TEXCOORD_3");
for (int i = 0; i < srcPrim.MorphTargets.Count; ++i)
{
var(pAccessor, nAccessor, tAccessor, c0Accessor, c1Accessor, uv0Accessor, uv1Accessor, uv2Accessor, uv3Accessor) = srcPrim._GetMorphTargetAccessors(i, vertexEncodings, morphTargetAttributes);
if (!hasPositions)
{
pAccessor = null;
}
if (!hasNormals)
{
nAccessor = null;
}
if (!hasTangents)
{
tAccessor = null;
}
if (!hasColors0)
{
c0Accessor = null;
}
if (!hasColors1)
{
c1Accessor = null;
}
if (!hasTexCoords0)
{
uv0Accessor = null;
}
if (!hasTexCoords1)
{
uv1Accessor = null;
}
if (!hasTexCoords2)
{
uv2Accessor = null;
}
if (!hasTexCoords3)
{
uv3Accessor = null;
}
AddMorphTarget(pAccessor, nAccessor, tAccessor, c0Accessor, c1Accessor, uv0Accessor, uv1Accessor, uv2Accessor, uv3Accessor);
}
}
/// <summary>
/// Converts a collection of <see cref="IMeshBuilder{TMaterial}"/> meshes into a collection of <see cref="PackedMeshBuilder{TMaterial}"/> meshes,
/// ensuring that the resources are shared across all meshes.
/// </summary>
/// <param name="meshBuilders">A collection of <see cref="IMeshBuilder{TMaterial}"/> meshes.</param>
/// <param name="settings">Mesh packaging settings.</param>
/// <returns>A collectio of <see cref="PackedMeshBuilder{TMaterial}"/> meshes.</returns>
internal static IEnumerable <PackedMeshBuilder <TMaterial> > CreatePackedMeshes(IEnumerable <IMeshBuilder <TMaterial> > meshBuilders, Scenes.SceneBuilderSchema2Settings settings)
{
try
{
foreach (var m in meshBuilders)
{
m.Validate();
}
}
catch (Exception ex)
{
throw new ArgumentException(ex.Message, nameof(meshBuilders), ex);
}
var vertexEncodings = new PackedEncoding();
vertexEncodings.JointsEncoding = meshBuilders.GetOptimalJointEncoding();
vertexEncodings.WeightsEncoding = settings.CompactVertexWeights ? EncodingType.UNSIGNED_SHORT : EncodingType.FLOAT;
var indexEncoding = meshBuilders.GetOptimalIndexEncoding();
foreach (var srcMesh in meshBuilders)
{
var dstMesh = new PackedMeshBuilder <TMaterial>(srcMesh.Name);
foreach (var srcPrim in srcMesh.Primitives)
{
if (srcPrim.Vertices.Count == 0)
{
continue;
}
var dstPrim = dstMesh.AddPrimitive(srcPrim.Material, srcPrim.VerticesPerPrimitive);
bool useStrided = settings.UseStridedBuffers;
if (srcPrim.MorphTargets.Count > 0)
{
useStrided = false; // if the primitive has morphing, it is better not to use strided vertex buffers.
}
if (useStrided)
{
dstPrim.SetStridedVertices(srcPrim, vertexEncodings);
}
else
{
dstPrim.SetStreamedVertices(srcPrim, vertexEncodings);
}
dstPrim.SetIndices(srcPrim, indexEncoding);
dstPrim.SetMorphTargets(srcPrim, vertexEncodings);
}
yield return(dstMesh);
}
}
public void SetStridedVertices(IPrimitiveReader <TMaterial> srcPrim, PackedEncoding vertexEncoding)
{
Guard.NotNull(srcPrim, nameof(srcPrim));
var vAccessors = VertexTypes.VertexUtils.CreateVertexMemoryAccessors(srcPrim.Vertices, vertexEncoding);
Guard.NotNull(vAccessors, nameof(srcPrim));
_StridedVertexType = srcPrim.VertexType;
_VertexAccessors = vAccessors;
}
public static void _GatherMorphTargetAttributes <TMaterial>(this IPrimitiveReader <TMaterial> srcPrim, HashSet <string> attributes)
{
var vertexEncodings = new PackedEncoding();
vertexEncodings.ColorEncoding = EncodingType.FLOAT;
for (int i = 0; i < srcPrim.MorphTargets.Count; ++i)
{
var accessors = srcPrim._GetMorphTargetAccessors(i, vertexEncodings, new HashSet <string>());
if (accessors.Pos != null)
{
attributes.Add("POSITIONDELTA");
}
if (accessors.Nrm != null)
{
attributes.Add("NORMALDELTA");
}
if (accessors.Tgt != null)
{
attributes.Add("TANGENTDELTA");
}
if (accessors.Col0 != null)
{
attributes.Add("COLOR_0DELTA");
}
if (accessors.Col1 != null)
{
attributes.Add("COLOR_1DELTA");
}
if (accessors.Tuv0 != null)
{
attributes.Add("TEXCOORD_0DELTA");
}
if (accessors.Tuv1 != null)
{
attributes.Add("TEXCOORD_1DELTA");
}
if (accessors.Tuv2 != null)
{
attributes.Add("TEXCOORD_2DELTA");
}
if (accessors.Tuv3 != null)
{
attributes.Add("TEXCOORD_3DELTA");
}
}
}
public void SetMorphTargets(IPrimitiveReader <TMaterial> srcPrim, PackedEncoding vertexEncodings)
{
bool hasPositions = _VertexAccessors.Any(item => item.Attribute.Name == "POSITION");
bool hasNormals = _VertexAccessors.Any(item => item.Attribute.Name == "NORMAL");
bool hasTangents = _VertexAccessors.Any(item => item.Attribute.Name == "TANGENT");
if (!hasPositions)
{
throw new InvalidOperationException("Set vertices before morph targets.");
}
for (int i = 0; i < srcPrim.MorphTargets.Count; ++i)
{
var mtv = srcPrim.MorphTargets[i].GetMorphTargetVertices(srcPrim.Vertices.Count);
var pAccessor = VertexTypes.VertexUtils.CreateVertexMemoryAccessor(mtv, "POSITIONDELTA", vertexEncodings);
var nAccessor = !hasNormals ? null : VertexTypes.VertexUtils.CreateVertexMemoryAccessor(mtv, "NORMALDELTA", vertexEncodings);
var tAccessor = !hasTangents ? null : VertexTypes.VertexUtils.CreateVertexMemoryAccessor(mtv, "TANGENTDELTA", vertexEncodings);
AddMorphTarget(pAccessor, nAccessor, tAccessor);
}
}
public static (MACCESSOR Pos, MACCESSOR Nrm, MACCESSOR Tgt, MACCESSOR Col0, MACCESSOR Col1, MACCESSOR Tuv0, MACCESSOR Tuv1, MACCESSOR Tuv2, MACCESSOR Tuv3) _GetMorphTargetAccessors <TMaterial>(this IPrimitiveReader <TMaterial> srcPrim, int morphTargetIdx, PackedEncoding vertexEncodings, ISet <string> requiredAttributes)
{
/// <summary>
/// Converts a collection of <see cref="IMeshBuilder{TMaterial}"/> meshes into a collection of <see cref="PackedMeshBuilder{TMaterial}"/> meshes,
/// ensuring that the resources are shared across all meshes.
/// </summary>
/// <param name="meshBuilders">A collection of <see cref="IMeshBuilder{TMaterial}"/> meshes.</param>
/// <param name="settings">Mesh packaging settings.</param>
/// <returns>A collectio of <see cref="PackedMeshBuilder{TMaterial}"/> meshes.</returns>
internal static IEnumerable <PackedMeshBuilder <TMaterial> > CreatePackedMeshes(IEnumerable <IMeshBuilder <TMaterial> > meshBuilders, Scenes.SceneBuilderSchema2Settings settings)
{
try
{
foreach (var m in meshBuilders)
{
m.Validate();
}
}
catch (Exception ex)
{
throw new ArgumentException(ex.Message, nameof(meshBuilders), ex);
}
var vertexEncodings = new PackedEncoding();
vertexEncodings.JointsEncoding = meshBuilders.GetOptimalJointEncoding();
vertexEncodings.WeightsEncoding = settings.CompactVertexWeights ? EncodingType.UNSIGNED_SHORT : EncodingType.FLOAT;
var indexEncoding = meshBuilders.GetOptimalIndexEncoding();
foreach (var srcMesh in meshBuilders)
{
// Gather all the primitives of the mesh
var srcPrims = srcMesh
.Primitives
.Where(item => item.Vertices.Count > 0)
.ToList();
// identify morph target attributes in use
var morphTargetsAttributes = new HashSet <string>();
foreach (var srcPrim in srcPrims)
{
srcPrim._GatherMorphTargetAttributes(morphTargetsAttributes);
}
// adjust vertex encoding
if (morphTargetsAttributes.Count > 0)
{
// if any primitive has morph targets, it is better not to use strided vertex buffers.
settings.UseStridedBuffers = false;
}
bool hasColorMorph = morphTargetsAttributes.Contains("COLOR_0DELTA") ||
morphTargetsAttributes.Contains("COLOR_1DELTA") ||
morphTargetsAttributes.Contains("COLOR_2DELTA") ||
morphTargetsAttributes.Contains("COLOR_3DELTA");
// if any primitive has color morphing, we need to ensure the vertex
// color attribute encoding is FLOAT to allow negative delta values.
vertexEncodings.ColorEncoding = hasColorMorph
? EncodingType.FLOAT
: (EncodingType?)null;
// Create a packed mesh
var dstMesh = new PackedMeshBuilder <TMaterial>(srcMesh.Name, srcMesh.Extras);
foreach (var srcPrim in srcPrims)
{
var dstPrim = dstMesh.AddPrimitive(srcPrim.Material, srcPrim.VerticesPerPrimitive);
if (settings.UseStridedBuffers)
{
dstPrim.SetStridedVertices(srcPrim, vertexEncodings);
}
else
{
dstPrim.SetStreamedVertices(srcPrim, vertexEncodings);
}
dstPrim.SetIndices(srcPrim, indexEncoding);
if (morphTargetsAttributes.Count > 0)
{
dstPrim.SetMorphTargets(srcPrim, vertexEncodings, morphTargetsAttributes);
}
}
yield return(dstMesh);
}
}
