/// <summary>
/// Mostly debug function
/// TODO: remove if not used
/// </summary>
private static float?GetHeight(EExportStrategy pStrategy, int y, CGroundField el, float?height)
{
if (pStrategy == EExportStrategy.FillMissingHeight)
{
if (height == null)
{
height = el.GetAverageHeightFromClosestDefined(3, false, CField.EHeight.Smooth);
}
}
else if (pStrategy == EExportStrategy.FillHeightsAroundDefined)
{
if (height == null && el.IsAnyNeighbourDefined())
{
height = el.GetHeight();
}
}
else if (pStrategy == EExportStrategy.ZeroAroundDefined)
{
if (height == null && el.IsAnyNeighbourDefined())
{
height = 0;
}
}
else if (pStrategy == EExportStrategy.CoordHeights)
{
height = y;
}
return(height);
}
public static Obj ExportToObj(string pArrayName, EExportStrategy pStrategy, bool pUseSmoothHeight,
Tuple <int, int> pStartIndex, Tuple <int, int> pEndIndex)
{
CGroundArray pArray = CProjectData.Points.groundArray;
Obj obj = new Obj(pArrayName);
float minHeight = CProjectData.GetMinHeight();
int missingCoordCount = 0;
int xStart = pStartIndex.Item1;
int yStart = pStartIndex.Item2;
int xEnd = pEndIndex.Item1 + 1;
int yEnd = pEndIndex.Item2 + 1;
xEnd = Math.Min(xEnd, pArray.arrayXRange);
yEnd = Math.Min(yEnd, pArray.arrayYRange);
//prepare vertices
for (int x = xStart; x < xEnd; x++)
{
for (int y = yStart; y < yEnd; y++)
{
Vertex v = new Vertex();
CGroundField el = pArray.GetField(x, y);
float? height = el.GetHeight(pUseSmoothHeight ? CField.EHeight.Smooth : CField.EHeight.MaxZ);
height = GetHeight(pStrategy, y, el, height);
//create vertex only if height is defined
if (height != null)
{
//TODO: ATTENTION! in OBJ the height value = Y, while in LAS format it is Z and X,Y are space coordinates
//move heights so the lowest point touches the 0
//if (pHeight != EHeight.Tree)
{
height -= minHeight;
}
v.LoadFromStringArray(new[] { "v", pArray.GetFieldXCoord(x).ToString(),
height.ToString(), pArray.GetFieldYCoord(y).ToString() });
obj.AddVertex(v);
//record the index of vertex associated with this field position
el.VertexIndex = obj.VertexList.Count; //first index = 1 (not 0)!
}
else
{
missingCoordCount++;
}
}
}
int faceCount = 0;
//generate faces
for (int x = xStart; x < xEnd - 1; x++)
{
for (int y = yStart; y < yEnd - 1; y++)
{
//create face only if all necessary vertices has been defined. -1 = not defined
//| /| 3:[0,1] 2:[1,1]
//|/ | 1:[0,0] 4:[1,0]
//we create 2 faces: (1,2,3) and (1,2,4)
int ind1 = pArray.GetField(x, y).VertexIndex;
if (ind1 != -1)
{
int ind2 = pArray.GetField(x + 1, y + 1).VertexIndex;
if (ind2 != -1)
{
int ind3 = pArray.GetField(x, y + 1).VertexIndex;
if (ind3 != -1)
{
Face f = new Face();
f.LoadFromStringArray(new[]
{
"f", ind1.ToString(), ind2.ToString(), ind3.ToString() //ind1+"//"+ind3, ind3+"//"+ind2, ind2+"//"+ind1
});
obj.FaceList.Add(f);
faceCount++;
}
int ind4 = pArray.GetField(x + 1, y).VertexIndex;
if (ind4 != -1)
{
Face f = new Face();
f.LoadFromStringArray(new[]
{
"f", ind1.ToString(), ind4.ToString(), ind2.ToString()
});
obj.FaceList.Add(f);
}
}
}
}
}
return(obj);
}