GetRequirements Callback Reference

    RTSHADER_API bool (*RTS_Shader3_GetRequirements)
    {
        IRTSExecutionState  *in_pExecState,
        void                *in_pParams,
        XSI_RTS_Primitive   *in_pGeom,
        void                **io_pShaderInstanceData,
        ULONG               in_lRequirement,
        ULONG               *out_pRequirementValue
    }
Use this callback to set whether any of the requirements listed in the eXSI_RTS_RequirementType enum are required or not by returning true or false in the out_pRequirementValue parameter.
Parameters:
in_pExecState  The execution state interface
in_pParams  The shader property page parameters
in_pGeom  The geometry information
Return values:
io_pShaderInstanceData  Pointer to the shader's instance user data
Parameters:
in_lRequirement  The requirement identifier
Return values:
out_pRequirementValue  The returned requirement value
Returns:
Success/failure
See also:
IRTSExecutionState, Realtime Shader Callbacks, Execution Flow