/// <summary>
/// * Position, Normal の Z座標に -1 を乗算する
/// * Rotation => Axis Angle に分解 => Axis の Z座標に -1 を乗算。Angle に -1 を乗算
/// * Triangle の index を 0, 1, 2 から 2, 1, 0 に反転する
/// </summary>
static void ReverseAxisAndFlipTriangle(this Model model, Reverser reverser, bool ignoreVrm)
{
foreach (var g in model.MeshGroups)
{
foreach (var m in g.Meshes)
{
foreach (var(k, v) in m.VertexBuffer)
{
if (k == VertexBuffer.PositionKey || k == VertexBuffer.NormalKey)
{
reverser.ReverseBuffer(v);
}
else if (k == VertexBuffer.TangentKey)
{
// I don't know
}
}
switch (m.IndexBuffer.ComponentType)
{
case AccessorValueType.UNSIGNED_BYTE:
FlipTriangle(SpanLike.Wrap <Byte>(m.IndexBuffer.Bytes));
break;
case AccessorValueType.UNSIGNED_SHORT:
FlipTriangle(SpanLike.Wrap <UInt16>(m.IndexBuffer.Bytes));
break;
case AccessorValueType.UNSIGNED_INT:
FlipTriangle(SpanLike.Wrap <UInt32>(m.IndexBuffer.Bytes));
break;
default:
throw new NotImplementedException();
}
foreach (var mt in m.MorphTargets)
{
foreach (var(k, v) in mt.VertexBuffer)
{
if (k == VertexBuffer.PositionKey || k == VertexBuffer.NormalKey)
{
reverser.ReverseBuffer(v);
}
if (k == VertexBuffer.TangentKey)
{
// I don't know
}
}
}
}
}
// 親から順に処理する
// Rootは原点決め打ちのノード(GLTFに含まれない)
foreach (var n in model.Root.Traverse().Skip(1))
{
n.SetMatrix(reverser.ReverseMatrix(n.Matrix), false);
}
// 親から順に処理したので不要
// model.Root.CalcWorldMatrix();
foreach (var s in model.Skins)
{
if (s.InverseMatrices != null)
{
reverser.ReverseBuffer(s.InverseMatrices);
}
}
foreach (var a in model.Animations)
{
// TODO:
}
if (model.Vrm != null)
{
if (!ignoreVrm)
{
// LookAt
if (model.Vrm.LookAt != null)
{
model.Vrm.LookAt.OffsetFromHeadBone = reverser.ReverseVector3(model.Vrm.LookAt.OffsetFromHeadBone);
}
// SpringBone
if (model.Vrm.SpringBone != null)
{
foreach (var b in model.Vrm.SpringBone.Springs)
{
foreach (var c in b.Colliders)
{
for (int i = 0; i < c.Colliders.Count; ++i)
{
var s = c.Colliders[i];
switch (s.ColliderType)
{
case VrmSpringBoneColliderTypes.Sphere:
c.Colliders[i] = VrmSpringBoneCollider.CreateSphere(reverser.ReverseVector3(s.Offset), s.Radius);
break;
case VrmSpringBoneColliderTypes.Capsule:
c.Colliders[i] = VrmSpringBoneCollider.CreateCapsule(reverser.ReverseVector3(s.Offset), s.Radius, reverser.ReverseVector3(s.CapsuleTail));
break;
default:
throw new NotImplementedException();
}
}
}
foreach (var j in b.Joints)
{
j.GravityDir = reverser.ReverseVector3(j.GravityDir);
}
}
}
}
}
}