fg_3Dzclip()Win32 DirectX Fastgraph/Light Prototype int fg_3Dzclip (double *source, double *dest, int n); Function fg_3Dzclip (source() As Double, dest() As Double, ByVal n As Long) As Long function fg_3Dzclip (var source, dest : double; n : integer) : integer; Description The fg_3Dzclip() function clips a series of 3D (x,y,z) polygon vertices against the z plane clipping values defined by fg_3Dsetzclip(). Near clipping uses true clipping, but far clipping occurs only if the entire polygon lies beyond the far clipping plane. This function is called internally by Fastgraph's 3D functions and is not usually called directly by applications. Parameters source is the name of the array containing the 3D (x,y,z) vertices to clip. The first three elements of the source array contain the coordinates for the first vertex, the next three elements are for the next vertex, and so on. dest is the name of the array that receives the clipped 3D (x,y,z) vertices. The first three elements of the dest array will contain the coordinates for the first vertex, the next three elements will contain the next vertex, and so on. The size of dest must be at least as large as the source array. n is the number of vertices in the source array. Return value The resulting number of vertices in the dest array. Restrictions 3D clipping is not supported for righthanded 3D coordinate systems. See also fg_3Dtransform(), fg_3Dtransformobject(), fg_3Dzcliprgb(), fg_3Dzcliptm()

copyright 2001 Ted Gruber Software, Inc.