[fpc-pascal] Class/Record helpers on genericd?

Anthony Walter sysrpl at gmail.com
Tue Apr 26 09:11:51 CEST 2016

Okay. Thanks. Just FYI here is my use case.

{ User defined vertex type }

  TColorLitVertex = record
    Position: TVec3;
    Normal: TVec3;
    Color: TVec4;

{ Contiguous data to be fed to an opengl vertex shader attribute }

  VertexData: TArray<TColorLitVertex>;

It would be nice to have both of these types of functionality supported:

VertexData[I].Color.Alpha := 0.5; // you can only write to record fields if
the container is an array

and ..

VertexData.Sort(SortZOrder); // you can only have methods on arrays using
record helpers, but not generic arrays

and later provide a reference to the first color location to opengl (array
types make this easiest) ...

glVertexAttribPointer(ColorAttribute, 4, GL_FLOAT, GL_FALSE,
SizeOf(TColorLitVertex), @VertexData[0].Color);
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