public:
     virtual bool __fastcall GetClipPlane( dword pIndex, D3DVALUE* pPlaneEquation );

• Description
• Parameters
• See Also

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The TDx_3DDevice::GetClipPlane() method will retrieve the coefficients of the user defined clipping plane for this device.

The plane equation exists in world space and is set using TDx_3DDevice::SetClipPlane().

The coefficients returned take the form of the general plane equation.
Eg: If values A, B, C, and D were returned in PlaneEquation they would fit the general plane equation such that Ax + By + Cz + D = 0.
A homogeneous coordinate point (x, y, z, w) will be visible where Ax + By + Cz + Dw >= 0.

If the method call fails, the OnError event will be triggered with one of the following values:
DDERR_INVALIDPARAMS

Index
The Index parameter identifies the clipping plane for which the coefficients are being retrieved.

PlaneEquation
The PlaneEquation parameter references a 4 element floating point array for holding the coefficients if this method returns successfully.

TDx_3DDevice::SetClipPlane()