/// <summary>
/// indicesの最大値が65535未満(-1を避ける)ならばushort 型で、
/// そうでなければ int型で IndexBufferを代入する
/// </summary>
public void AssignIndexBuffer(Span <int> indices)
{
bool isInt = false;
foreach (var i in indices)
{
if (i >= short.MaxValue)
{
isInt = true;
break;
}
}
if (isInt)
{
if (IndexBuffer.Stride != 4)
{
IndexBuffer.ComponentType = AccessorValueType.UNSIGNED_INT;
if (IndexBuffer.AccessorType != AccessorVectorType.SCALAR)
{
throw new Exception();
}
}
// 変換なし
IndexBuffer.Assign(indices);
}
else
{
// int to ushort
IndexBuffer.AssignAsShort(indices);
}
}
/// <summary>
/// BoneSkinningもしくはMorphTargetの適用
/// <summary>
public void Skinning(INativeArrayManager arrayManager, VertexBuffer vertexBuffer = null)
{
m_indexOfRoot = (ushort)Joints.IndexOf(Root);
var addRoot = Root != null && m_indexOfRoot == ushort.MaxValue;
if (addRoot)
{
m_indexOfRoot = (ushort)Joints.Count;
Joints.Add(Root);
}
if (m_matrices == null)
{
m_matrices = new Matrix4x4[Joints.Count];
}
if (InverseMatrices == null)
{
CalcInverseMatrices(arrayManager);
}
else
{
if (addRoot)
{
var inverseArray = InverseMatrices.Bytes.Reinterpret <Matrix4x4>(1);
var concat = inverseArray.Concat(new[] { Root.InverseMatrix }).ToArray();
InverseMatrices.Assign(concat);
}
}
var inverse = InverseMatrices.GetSpan <Matrix4x4>();
// if (Root != null)
// {
// var rootInverse = Root.InverseMatrix;
// var root = Root.Matrix;
// for (int i = 0; i < m_matrices.Length; ++i)
// {
// m_matrices[i] = inverse[i] * Joints[i].Matrix * rootInverse;
// }
// }
// else
{
for (int i = 0; i < m_matrices.Length; ++i)
{
var inv = i < inverse.Length ? inverse[i] : Joints[i].InverseMatrix;
m_matrices[i] = inv * Joints[i].Matrix;
}
}
if (vertexBuffer != null)
{
Apply(arrayManager, vertexBuffer);
}
}