public override List <Vertex> GenerateVertexList(int resolutionU, int resolutionV)
{
List <Vertex> startCapList = startCap.GenerateVertexList(resolutionU, resolutionU / 4);
List <Vertex> shaftList = shaft.GenerateVertexList(resolutionU, resolutionV);
List <Vertex> endCapList = endCap.GenerateVertexList(resolutionU, resolutionU / 4);
return(startCapList.Concat(shaftList).Concat(endCapList).ToList());
}
/// <inheritdoc />
public override List <Vertex> GenerateVertexList(int resolutionU, int resolutionV)
{
// Generate the vertices of two end caps, and a shaft in between:
List <Vertex> startCapList = startCap.GenerateVertexList(resolutionU, resolutionU / 4);
List <Vertex> endCapList = endCap.GenerateVertexList(resolutionU, resolutionU / 4);
// Using a slice, remove the first and last ring of vertices of the shaft, which overlap with the last
// rings of the startCap and endCap respectively. Later we will stitch the shaft and end caps together with
// triangles between them, during the GenerateIndexList() step.
Slice <Vertex> shaftSlice = new Slice <Vertex>(
shaft.GenerateVertexList(resolutionU, resolutionV),
resolutionU,
Cylinder.CalculateVertexCount(resolutionU, resolutionV) - 2 * resolutionU);
// Recalculate the surface normal between the cylinder and the start cap:
for (int i = 0; i < (resolutionU - 1); i++)
{
dvec3 surfacePosition = startCapList[(resolutionU / 4 - 1) * resolutionU + i + 1].Position;
dvec3 du = surfacePosition - startCapList[(resolutionU / 4 - 1) * resolutionU + i + 1 + 1].Position;
dvec3 dv = surfacePosition - shaftSlice[i].Position;
// Calculate the position of the rings of vertices:
dvec3 surfaceNormal = dvec3.Cross(du.Normalized, dv.Normalized);
startCapList[(resolutionU / 4 - 1) * resolutionU + i + 1] = new Vertex((vec3)surfacePosition, (vec3)surfaceNormal);
}
// Stitch the end of the triangles:
dvec3 surfacePosition2 = startCapList[(resolutionU / 4 - 1) * resolutionU + resolutionU].Position;
dvec3 du2 = surfacePosition2 - startCapList[(resolutionU / 4 - 1) * resolutionU + 1].Position;
dvec3 dv2 = surfacePosition2 - shaftSlice[resolutionU].Position;
// Calculate the position of the rings of vertices:
dvec3 surfaceNormal2 = dvec3.Cross(du2.Normalized, dv2.Normalized);
startCapList[(resolutionU / 4 - 1) * resolutionU + resolutionU] = new Vertex((vec3)surfacePosition2, (vec3)surfaceNormal2);
return(startCapList.Concat(shaftSlice).Concat(endCapList).ToList());
}
