Graph :

• Fxy :
• plotting a z=f(x, y) function using TGLHeightField
• using TXYZGrid as graph grid

• Height Field :
• more advanced uses for TGLHeightField (resolution changes, color, lighting...)
• using TGLHeightField to plot a dynamic f(x, y) function

• Splines :
• basic spline use with color interpolation
• using the camera in orthogonal mode for rendering 2D graphs

• Points :
• rendering clouds of points with TGLPoints
• point paramaters

• Projection :
• connecting graph points to their projection plane
• using parallel projection matrices
• blending direct OpenGL with other scene objects

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