/// <inheritdoc />
public override List <int> GenerateIndexList(int resolutionU, int resolutionV, int indexOffset = 0)
{
// The index list of a model tells the GPU between which vertices to draw triangles. Each three consecutive
// indices constitute a single triangle. Since the Capsule vertex array consists of several lists stitched
// together, the indices of the shaft and endCap will have shifted by some amount. Therefore, calculate
// this index offset for all submodels:
int indexOffset2 = indexOffset + Hemisphere.CalculateVertexCount(resolutionU, resolutionU / 4) - resolutionU;
int indexOffset3 = indexOffset2 + Cylinder.CalculateVertexCount(resolutionU, resolutionV) - resolutionU;
int indexOffset4 = indexOffset3 + Hemisphere.CalculateVertexCount(resolutionU, resolutionU / 4) - resolutionU;
// Generate the startCap indices as normal:
List <int> startCapList = startCap.GenerateIndexList(resolutionU, resolutionU / 4, indexOffset);
// Generate a shaft, using the last ring of the startCap to begin with. This is done by subtracting
// `resolutionU` from indexOffset2. This automatically stitches the gap between the start cap and the shaft:
List <int> shaftList = shaft.GenerateIndexList(resolutionU, resolutionV - 1, indexOffset2);
// Generate the endCap indices as normal:
List <int> endCapList = endCap.GenerateIndexList(resolutionU, resolutionU / 4, indexOffset3);
// The final ring between the endCap and the shaft must be generated manually:
List <int> stitchList = new List <int>(resolutionU);
// Add a ring of triangles:
for (int i = 1; i < resolutionU - 1; i++)
{
int invertedI = resolutionU - i;
stitchList.Add(indexOffset + invertedI + indexOffset4);
stitchList.Add(indexOffset + (i + 1) + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + i + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + (invertedI - 1) + indexOffset4);
stitchList.Add(indexOffset + (i + 1) + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + invertedI + indexOffset4);
}
// Stitch the end of the ring of triangles:
stitchList.Add(indexOffset + 1 + indexOffset4);
stitchList.Add(indexOffset + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + resolutionU - 1 + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + indexOffset4);
stitchList.Add(indexOffset + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + 1 + indexOffset4);
stitchList.Add(indexOffset + resolutionU - 1 + indexOffset4);
stitchList.Add(indexOffset + 1 + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + indexOffset3 - resolutionU);
stitchList.Add(indexOffset + indexOffset4);
stitchList.Add(indexOffset + resolutionU - 1 + indexOffset4);
stitchList.Add(indexOffset + indexOffset3 - resolutionU);
return(startCapList.Concat(shaftList).Concat(endCapList).Concat(stitchList).ToList());
}
public override List <int> GenerateIndexList(int resolutionU, int resolutionV, int indexOffset = 0)
{
int indexOffset2 = indexOffset + Hemisphere.CalculateVertexCount(resolutionU, resolutionU / 4);
int indexOffset3 = indexOffset + indexOffset2 + Cylinder.CalculateVertexCount(resolutionU, resolutionV);
List <int> startCapList = startCap.GenerateIndexList(resolutionU, resolutionU / 4, indexOffset);
List <int> shaftList = shaft.GenerateIndexList(resolutionU, resolutionV, indexOffset2);
List <int> endCapList = endCap.GenerateIndexList(resolutionU, resolutionU / 4, indexOffset3);
return(startCapList.Concat(shaftList).Concat(endCapList).ToList());
}