public void GetElevationRange()
{
TrimbleTINModel TTM = new TrimbleTINModel();
TTM.LoadFromFile(Path.Combine("TestData", "Bug36372.ttm"));
TTM.GetElevationRange(out var MinElev, out var MaxElev);
MinElev.Should().BeApproximately(22.5, 0.001);
MaxElev.Should().BeApproximately(37.33, 0.001);
}
/// <summary>
/// Builds a SuperElevation LOD to SuperElevationProfile specifications as one vertex buffer and one index buffer.
/// The order in which the buffers are built reflects the nesting in the TrProfile. The nesting order is:
/// (Polylines (Vertices)). All vertices and indices are built contiguously for an LOD.
/// </summary>
/// <param name="viewer">Viewer.</param>
/// <param name="worldPosition">WorldPosition.</param>
/// <param name="iLOD">Index of LOD mesh to be generated from profile.</param>
/// <param name="iLODItem">Index of LOD mesh to be generated from profile.</param>
public new ShapePrimitive BuildPrimitive(Viewer viewer, WorldPosition worldPosition, int iLOD, int iLODItem)
{
// Call for track section to initialize itself
if (DTrackData.IsCurved == 0)
{
LinearGen();
}
else
{
CircArcGen();
}
// Count vertices and indices
LOD lod = (LOD)TrProfile.LODs[iLOD];
LODItem lodItem = (LODItem)lod.LODItems[iLODItem];
NumVertices = (int)(lodItem.NumVertices * (NumSections + 1));
NumIndices = (short)(lodItem.NumSegments * NumSections * 6);
// (Cells x 2 triangles/cell x 3 indices/triangle)
// Allocate memory for vertices and indices
VertexList = new VertexPositionNormalTexture[NumVertices]; // numVertices is now aggregate
TriangleListIndices = new short[NumIndices]; // as is NumIndices
// Build the mesh for lod
VertexIndex = 0;
IndexIndex = 0;
whichCase = 0; //0: no elevation (MaxElev=0), 1: start (startE = 0, Max!=end),
//2: end (end=0, max!=start), 3: middle (start>0, end>0), 4: start and finish in one
if (StartElev.AlmostEqual(0f, 0.001f) && MaxElev.AlmostEqual(0f, 0.001f) && EndElv.AlmostEqual(0f, 0.001f))
{
whichCase = 0; //no elev
}
else if (StartElev.AlmostEqual(0f, 0.001f) && EndElv.AlmostEqual(0f, 0.001f))
{
whichCase = 4; //finish/start in one
}
else if (StartElev.AlmostEqual(0f, 0.001f) && !EndElv.AlmostEqual(0f, 0.001f))
{
whichCase = 1; //start
}
else if (EndElv.AlmostEqual(0f, 0.001f) && !StartElev.AlmostEqual(0f, 0.001f))
{
whichCase = 2; //finish
}
else
{
whichCase = 3; //in middle
}
Matrix PreRotation = Matrix.Identity;
elevated = MaxElev;
if (whichCase == 3 || whichCase == 2)
{
PreRotation = Matrix.CreateRotationZ(-elevated * Math.Sign(DTrackData.param1));
}
//if section is in the middle of curve, will only rotate the first set of vertex, others will follow the same rotation
prevRotation = 0f;
Vector3 tmp;
// Initial load of baseline cross section polylines for this LOD only:
foreach (Polyline pl in lodItem.Polylines)
{
foreach (Vertex v in pl.Vertices)
{
tmp = new Vector3(v.Position.X, v.Position.Y, v.Position.Z);
if (whichCase == 3 || whichCase == 2)
{
tmp = Vector3.Transform(tmp, PreRotation);
prevRotation = MaxElev;
}
VertexList[VertexIndex].Position = tmp;
VertexList[VertexIndex].Normal = v.Normal;
VertexList[VertexIndex].TextureCoordinate = v.TexCoord;
VertexIndex++;
}
}
// Initial load of base cross section complete
// Now generate and load subsequent cross sections
OldRadius = -center;
uint stride = VertexIndex;
offSet = 0;
for (uint i = 0; i < NumSections; i++)
{
currentRotation = determineRotation(DTrackData.param1);
elevated = currentRotation - prevRotation;
prevRotation = currentRotation;
if (DTrackData.param1 > 0)
{
elevated *= -1;
}
foreach (Polyline pl in lodItem.Polylines)
{
uint plv = 0; // Polyline vertex index
foreach (Vertex v in pl.Vertices)
{
if (DTrackData.IsCurved == 0)
{
LinearGen(stride, pl); // Generation call
}
else
{
CircArcGen(stride, pl);
}
if (plv > 0)
{
// Sense for triangles is clockwise
// First triangle:
TriangleListIndices[IndexIndex++] = (short)VertexIndex;
TriangleListIndices[IndexIndex++] = (short)(VertexIndex - 1 - stride);
TriangleListIndices[IndexIndex++] = (short)(VertexIndex - 1);
// Second triangle:
TriangleListIndices[IndexIndex++] = (short)VertexIndex;
TriangleListIndices[IndexIndex++] = (short)(VertexIndex - stride);
TriangleListIndices[IndexIndex++] = (short)(VertexIndex - 1 - stride);
}
VertexIndex++;
plv++;
}
}
OldRadius = radius; // Get ready for next segment
offSet++;
}
// Create and populate a new ShapePrimitive
var indexBuffer = new IndexBuffer(viewer.GraphicsDevice, typeof(short), NumIndices, BufferUsage.WriteOnly);
indexBuffer.SetData(TriangleListIndices);
return(new ShapePrimitive(lodItem.LODMaterial, new SharedShape.VertexBufferSet(VertexList, viewer.GraphicsDevice), indexBuffer, 0, NumVertices, NumIndices / 3, new[] { -1 }, 0));
}
