private static int GetInterpolate(MeshInfo mesh, Dictionary <uint, int> associate, int i0, int i1)
{
int midIndex;
uint indicePair0 = ((uint)i0 << 16) | (uint)i1;
uint indicePair1 = ((uint)i1 << 16) | (uint)i0;
if (!associate.TryGetValue(indicePair0, out midIndex) && !associate.TryGetValue(indicePair1, out midIndex))
{
midIndex = mesh.positions.Count;
associate.Add(indicePair0, midIndex);
associate.Add(indicePair1, midIndex);
mesh.positions.Add((mesh.positions[i0] + mesh.positions[i1]) * 0.5f);
mesh.colors.Add(Color32.Lerp(mesh.colors[i0], mesh.colors[i1], 0.5f));
mesh.uv0s.Add((mesh.uv0s[i0] + mesh.uv0s[i1]) * 0.5f);
mesh.uv1s.Add((mesh.uv1s[i0] + mesh.uv1s[i1]) * 0.5f);
var newNormal = (mesh.normals[i0] + mesh.normals[i1]).normalized;
var newTangent = (Vector3)mesh.tangents[i0];
Vector3.OrthoNormalize(ref newNormal, ref newTangent);
mesh.normals.Add(newNormal);
mesh.tangents.Add(new Vector4(newTangent.x, newTangent.y, newTangent.z, mesh.tangents[i0].w));
}
return(midIndex);
}
public void CopyFrom(MeshInfo srcMeshInfo)
{
positions.AddRange(srcMeshInfo.positions);
normals.AddRange(srcMeshInfo.normals);
tangents.AddRange(srcMeshInfo.tangents);
colors.AddRange(srcMeshInfo.colors);
uv0s.AddRange(srcMeshInfo.uv0s);
uv1s.AddRange(srcMeshInfo.uv1s);
indices.AddRange(srcMeshInfo.indices);
}
public void Release()
{
m_reference = null;
ReleaseList(ref m_positions);
ReleaseList(ref m_normals);
ReleaseList(ref m_tangents);
ReleaseList(ref m_colors);
ReleaseList(ref m_uv0s);
ReleaseList(ref m_uv1s);
ReleaseList(ref m_indices);
}
public void Initialize(MeshInfo refMeshInfo = null)
{
InitializeList(ref m_positions);
InitializeList(ref m_normals);
InitializeList(ref m_tangents);
if (refMeshInfo == null)
{
InitializeList(ref m_colors);
InitializeList(ref m_uv0s);
InitializeList(ref m_uv1s);
InitializeList(ref m_indices);
}
else
{
m_reference = refMeshInfo;
ReleaseList(ref m_colors);
ReleaseList(ref m_uv0s);
ReleaseList(ref m_uv1s);
ReleaseList(ref m_indices);
}
}
// Tessellate srcMesh into destMesh
public static void Tessellate(MeshInfo mesh, float maxFragSizeSqr)
{
var largeTri = ListPool <int> .Get();
var largeTriNext = ListPool <int> .Get();
for (int i = 0, imax = mesh.indices.Count; i < imax; i += 3)
{
largeTri.Add(i);
}
while (largeTri.Count > 0)
{
for (int t = 0, imax = largeTri.Count; t < imax; ++t)
{
var triNum = largeTri[t];
var populatedCount = 0;
var needCutAgain = false;
s_vi[0] = mesh.indices[triNum + 0];
s_vi[1] = mesh.indices[triNum + 1];
s_vi[2] = mesh.indices[triNum + 2];
if (mesh.positions.Count < MAX_VERTEX_COUNT && NeedInterpolate(mesh.positions[s_vi[0]], mesh.positions[s_vi[1]], maxFragSizeSqr, out needCutAgain, out s_midVerts[populatedCount].Length))
{
s_midVerts[populatedCount].Index = GetInterpolate(mesh, s_indiceAssociate, s_vi[0], s_vi[1]);
s_midVerts[populatedCount].Opposing = s_vi[2];
s_midVerts[populatedCount].Right = s_vi[0];
s_midVerts[populatedCount].Left = s_vi[1];
s_midVerts[populatedCount].NeedCutAgain = needCutAgain;
++populatedCount;
}
if (mesh.positions.Count < MAX_VERTEX_COUNT && NeedInterpolate(mesh.positions[s_vi[1]], mesh.positions[s_vi[2]], maxFragSizeSqr, out needCutAgain, out s_midVerts[populatedCount].Length))
{
s_midVerts[populatedCount].Index = GetInterpolate(mesh, s_indiceAssociate, s_vi[1], s_vi[2]);
s_midVerts[populatedCount].Opposing = s_vi[0];
s_midVerts[populatedCount].Right = s_vi[1];
s_midVerts[populatedCount].Left = s_vi[2];
s_midVerts[populatedCount].NeedCutAgain = needCutAgain;
++populatedCount;
}
if (mesh.positions.Count < MAX_VERTEX_COUNT && NeedInterpolate(mesh.positions[s_vi[2]], mesh.positions[s_vi[0]], maxFragSizeSqr, out needCutAgain, out s_midVerts[populatedCount].Length))
{
s_midVerts[populatedCount].Index = GetInterpolate(mesh, s_indiceAssociate, s_vi[2], s_vi[0]);
s_midVerts[populatedCount].Opposing = s_vi[1];
s_midVerts[populatedCount].Right = s_vi[2];
s_midVerts[populatedCount].Left = s_vi[0];
s_midVerts[populatedCount].NeedCutAgain = needCutAgain;
++populatedCount;
}
switch (populatedCount)
{
case 1:
mesh.indices[triNum + 0] = s_midVerts[0].Index;
mesh.indices[triNum + 1] = s_midVerts[0].Opposing;
mesh.indices[triNum + 2] = s_midVerts[0].Right;
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[0].Left);
mesh.indices.Add(s_midVerts[0].Opposing);
if (s_midVerts[0].NeedCutAgain)
{
largeTriNext.Add(triNum);
largeTriNext.Add(mesh.indices.Count - 3);
}
break;
case 2:
if (s_midVerts[0].Right == s_midVerts[1].Left)
{
mesh.indices[triNum + 0] = s_midVerts[0].Right;
mesh.indices[triNum + 1] = s_midVerts[0].Index;
mesh.indices[triNum + 2] = s_midVerts[1].Index;
if (s_midVerts[0].Length > s_midVerts[1].Length)
{
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[0].Index);
}
else
{
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[1].Index);
}
}
else // if (midVerts[0].Left == midVerts[1].Right)
{
mesh.indices[triNum + 0] = s_midVerts[1].Right;
mesh.indices[triNum + 1] = s_midVerts[1].Index;
mesh.indices[triNum + 2] = s_midVerts[0].Index;
if (s_midVerts[0].Length > s_midVerts[1].Length)
{
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[0].Index);
}
else
{
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[0].Opposing);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[1].Index);
}
}
if (s_midVerts[0].NeedCutAgain || s_midVerts[1].NeedCutAgain)
{
largeTriNext.Add(triNum);
largeTriNext.Add(mesh.indices.Count - 6);
largeTriNext.Add(mesh.indices.Count - 3);
}
break;
case 3:
mesh.indices[triNum + 0] = s_midVerts[0].Index;
mesh.indices[triNum + 1] = s_midVerts[1].Index;
mesh.indices[triNum + 2] = s_midVerts[2].Index;
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[2].Index);
mesh.indices.Add(s_midVerts[1].Opposing);
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[0].Index);
mesh.indices.Add(s_midVerts[2].Opposing);
mesh.indices.Add(s_midVerts[2].Index);
mesh.indices.Add(s_midVerts[1].Index);
mesh.indices.Add(s_midVerts[0].Opposing);
if (s_midVerts[0].NeedCutAgain || s_midVerts[1].NeedCutAgain || s_midVerts[2].NeedCutAgain)
{
largeTriNext.Add(triNum);
largeTriNext.Add(mesh.indices.Count - 9);
largeTriNext.Add(mesh.indices.Count - 6);
largeTriNext.Add(mesh.indices.Count - 3);
}
break;
}
}
if (mesh.positions.Count >= MAX_VERTEX_COUNT)
{
break;
}
// shift oversized triangle list for next loop
ListPool <int> .Release(largeTri);
largeTri = largeTriNext;
largeTriNext = ListPool <int> .Get();
}
ListPool <int> .Release(largeTri);
ListPool <int> .Release(largeTriNext);
s_indiceAssociate.Clear();
}
