/// <inheritdoc/>
public void RebuildFace(Topology.Face face, DynamicMesh.IIndexedVertexAttributes vertexAttributes)
{
foreach (var edge in face.edges)
{
_addCornerVertices(edge, vertexAttributes);
}
}
/// <inheritdoc/>
public void BuildFace(Topology.Face face, DynamicMesh.IIndexedVertexAttributes vertexAttributes, IList <int> triangleIndices)
{
int neighborCount = face.neighborCount;
int currentOuterVertexIndex = vertexAttributes.index;
if (_ringDepth > 1)
{
int nextOuterVertexIndex = currentOuterVertexIndex + _ringDepth;
for (int neighborIndex = 1; neighborIndex < neighborCount; ++neighborIndex)
{
int outerDepthIndex = 0;
for (int innerDepthIndex = 1; innerDepthIndex < _ringDepth; ++innerDepthIndex)
{
triangleIndices.Add(currentOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(currentOuterVertexIndex + innerDepthIndex);
triangleIndices.Add(currentOuterVertexIndex + innerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + innerDepthIndex);
outerDepthIndex = innerDepthIndex;
}
currentOuterVertexIndex = nextOuterVertexIndex;
nextOuterVertexIndex += _ringDepth;
}
// Triangles that wrap-around and reuse the first column of vertices.
{
nextOuterVertexIndex = vertexAttributes.index;
int outerDepthIndex = 0;
for (int innerDepthIndex = 1; innerDepthIndex < _ringDepth; ++innerDepthIndex)
{
triangleIndices.Add(currentOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(currentOuterVertexIndex + innerDepthIndex);
triangleIndices.Add(currentOuterVertexIndex + innerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + outerDepthIndex);
triangleIndices.Add(nextOuterVertexIndex + innerDepthIndex);
outerDepthIndex = innerDepthIndex;
}
}
}
int innerRingFirstVertexIndex = vertexAttributes.index + _ringDepth - 1;
int innerRingNextVertexIndex = innerRingFirstVertexIndex + _ringDepth;
for (int triangleIndex = 2; triangleIndex < neighborCount; ++triangleIndex)
{
triangleIndices.Add(innerRingFirstVertexIndex);
triangleIndices.Add(innerRingNextVertexIndex);
innerRingNextVertexIndex += _ringDepth;
triangleIndices.Add(innerRingNextVertexIndex);
}
RebuildFace(face, vertexAttributes);
}
/// <inheritdoc/>
public void BuildFace(Topology.Face face, DynamicMesh.IIndexedVertexAttributes vertexAttributes, IList <int> triangleIndices)
{
int neighborCount = face.neighborCount;
int currentVertexIndex = vertexAttributes.index;
// __(0)__
// __-- | --__
// (1) | (2)__
// \ | / \ --__
// \ A | B / \ --__
// \ | / \ --__
// \ | / \ --__
// \ | / \ --(5)
// \ | / \ /
// \ | / C \ D /
// (3)__ \ /
// --__ \ /
// --__ \ /
// --__ \ /
// --__ \ /
// --(7)
for (int neighborIndex = 0; neighborIndex < neighborCount; ++neighborIndex)
{
// A (1->0->3)
triangleIndices.Add(currentVertexIndex + 1);
triangleIndices.Add(currentVertexIndex + 0);
triangleIndices.Add(currentVertexIndex + 3);
// B (3->0->2)
triangleIndices.Add(currentVertexIndex + 3);
triangleIndices.Add(currentVertexIndex + 0);
triangleIndices.Add(currentVertexIndex + 2);
// C (3->2->7)
triangleIndices.Add(currentVertexIndex + 3);
triangleIndices.Add(currentVertexIndex + 2);
triangleIndices.Add(currentVertexIndex + 7);
// D (7->2->1)
triangleIndices.Add(currentVertexIndex + 7);
triangleIndices.Add(currentVertexIndex + 2);
triangleIndices.Add(currentVertexIndex + 5);
currentVertexIndex += 4;
}
triangleIndices[triangleIndices.Count - 4] = vertexAttributes.index + 3;
triangleIndices[triangleIndices.Count - 3] = vertexAttributes.index + 3;
triangleIndices[triangleIndices.Count - 1] = vertexAttributes.index + 1;
int forwardVertexIndex = vertexAttributes.index + 3;
int backwardVertexIndex = vertexAttributes.index + neighborCount * 4 - 1;
int triangleIndex = 2;
while (triangleIndex < neighborCount)
{
triangleIndices.Add(backwardVertexIndex);
triangleIndices.Add(forwardVertexIndex);
backwardVertexIndex -= 4;
triangleIndices.Add(backwardVertexIndex);
if (++triangleIndex == neighborCount)
{
break;
}
triangleIndices.Add(backwardVertexIndex);
triangleIndices.Add(forwardVertexIndex);
forwardVertexIndex += 4;
triangleIndices.Add(forwardVertexIndex);
++triangleIndex;
}
RebuildFace(face, vertexAttributes);
}