TBGL_GBufferDefineFromArray how without function overloading ?

[kryton9]

Petr, I was wondering how you handled different parameter values, like vec2f or vec3f and rgb or rgba in TBGL_GBufferDefineFromArray
without function overloading?
Thanks for any tips.

[Petr Schreiber]

Hi Kent,

in TBGL_GBufferCreate you specify if buffer is 2D or 3D. Then the TBGL_GBufferDefineFromArray presumes 2f or 3f accordingly. I parse just pointer to whatever is passed there, so type does not matter.


Petr

[Petr Schreiber]

In pure thinBASIC, you can go polymorphic with passing parameter as UDT this way:

uses "TBGL", "Console"


dim arr2d(3) as tbgl_tVector2f
dim arr3d(3) as tbgl_tVector3f
         
TellMeWhatItIs(arr2d)
TellMeWhatItIs(arr3d)


waitkey
         
function TellMeWhatItIs(byref x() as any)


  select case sizeOf(x(1))
    case sizeOf(tbgl_tVector2f)
      printl "It is 2D!"
      
    case sizeOf(tbgl_tVector3f)
      printl "It is 3D!"
      
    case else
      printl "I am dazed and confused"
      
  end select    


end function

Petr

[kryton9]

Thanks Petr.