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NTGraph3D (OpenGL) color?
i am working on some project requiring 3D display to plot surface.
NTGraph3d does just about everything I need and it has quite simple interface:
http://www.codeproject.com/KB/openGL/ntgraph3d_atl...
The problem is setting color of the element. It always seem to be applied to all elements not just selected one. This makes features of the surface not recognizable. All I need is to plot surface where elevation is different color. Any more effects (lighting, shades, etc.) is not essential. Any help?
1 Answer
- Iby KLv 71 decade agoFavorite Answer
i have the same problem, ElementLineColor has only one parameter (ID) and issue is how to properly use element ID (not documented). I tried to combine it like ID=I*MAxX+J but it did not work.
following code at least gives transition or color gradient from one line to next:
NTGraph3D.ClearGraph
NTGraph3D.AddElement
NTGraph3D.Caption = ""
For j = 0 To MaxX-1
For i = 0 To MaxY -1
NTGraph3D.AddElement
ID=j ' ID=i*MaxX+J does not work!?
NTGraph3D.ElementType(ID) = 0 ' 0 = element type line
X = i
y = j
Z = dataarray(i, j)
col = Abs((Z + 2) * 50) Mod 255
NTGraph3D.ElementLineColor(ID) = RGB(j Mod 255, j Mod 255, 255 - col Mod 255)
NTGraph3D.PlotXYZ X, Z, y, ID '(j Mod 128) + 1 'col
Next
Next
NTGraph3D.AutoRange
