/// <summary>
/// Builds all vertex structures for the given detail level.
/// </summary>
/// <param name="buildOptions">Some generic options for structure building</param>
public override VertexStructure BuildStructure(StructureBuildOptions buildOptions)
{
VertexStructure structureFromChild = m_objTypeToStack.BuildStructure(buildOptions);
structureFromChild.EnsureNotNull(nameof(structureFromChild));
BoundingBox childStructBox = structureFromChild.GenerateBoundingBox();
Vector3 correctionVector = -childStructBox.GetBottomCenter();
// Copy metadata infomration of the VertexStructures
VertexStructure result = structureFromChild.Clone(
copyGeometryData: false,
capacityMultiplier: m_stackSize);
// Build geometry
for (int loop = 0; loop < m_stackSize; loop++)
{
float actYCorrection = childStructBox.Height * loop;
Vector3 localCorrection = new Vector3(correctionVector.X, correctionVector.Y + actYCorrection, correctionVector.Z);
int baseVertex = loop * structureFromChild.CountVertices;
foreach (Vertex actVertex in structureFromChild.Vertices)
{
// Change vertex properties based on stack position
Vertex changedVertex = actVertex;
changedVertex.Position = changedVertex.Position + localCorrection;
if (loop % 2 == 1)
{
changedVertex.Color = changedVertex.Color.ChangeColorByLight(0.05f);
}
// Add the vertex
result.AddVertex(changedVertex);
}
// Clone all surfaces
foreach (VertexStructureSurface actSurfaceFromChild in structureFromChild.Surfaces)
{
VertexStructureSurface newSurface = result.CreateSurface(actSurfaceFromChild.CountTriangles);
foreach (Triangle actTriangle in actSurfaceFromChild.Triangles)
{
newSurface.AddTriangle(
baseVertex + actTriangle.Index1,
baseVertex + actTriangle.Index2,
baseVertex + actTriangle.Index3);
}
}
}
return(result);
}
