Generic (void *)int

[Giuseppe Barbieri]

I just had a chance to try, but that, unfortunately, doesnt seem to work..
https://github.com/elect86/panama/blob/master/src/test/kotlin/hello-triangle.kt#L100-L102

I get a black triangle (I shall get a colored one instead)

I guess I get at least the vertex positions (the triangle, although black,
is there) because in my case `semantic.attr.POSITION` is luckily zero,
which is the same index where the attributes start from.

Other ideas?

Il giorno lun 18 feb 2019 alle ore 10:56 Jorn Vernee <jbvernee at xs4all.nl>
ha scritto:

> Hi Giuseppe,
>
> You should be able to use this trick:
>
>      long pointerValue = 12L; // e.g.
>      Scope scope = Scope.newNativeScope; // or Scope.globalScope().fork()
> depending on which version you are
>      Pointer<Long> ptr = scope.allocate(NativeTypes.UINT64);
>      ptr.set(pointerValue);
>      Pointer<?> result =
> ptr.cast(NativeTypes.VOID).cast(NativeTypes.VOID.pointer()).get();
>      // use 'result'
>
> Be aware that this does do an allocation of a 64 bit int, so you might
> want to reuse the allocated space if you create a lot of pointers from
> literals.
>
> Maybe in the future we can add an API for creating pointers from long
> literals directly.
>
> Jorn
>
> Giuseppe Barbieri schreef op 2019-02-18 10:44:
> > Thanks Sundar,
> >
> > that works flawless for `(void *)0`
> >
> > But now I also would need a generic solution, for example:
> >
> > (void *)12
> >
> > There is a sill opengl call ( glVertexPointer ) requesting explicitely
> > that: https://stackoverflow.com/a/8283855/1047713
> >
> > Signature:
> >
> > void glVertexAttribPointer(int index, int size, int type, byte
> > normalized, int stride, Pointer<?> pointer);
> >
> >
> > is there actually a way?
> >
> >
> >
> >
> >
> >
> > You can use Pointer.nullPointer() method.
> >
> > -Sundar
> >
> > On 18/02/19, 8:09 AM, Giuseppe Barbieri wrote:
> >> Hi,
> >>
> >> I'm looking for a way to convert this:
> >>
> >> (void*)0
> >>
> >> in Java.
> >>
> >> I tried to allocate a pointer and set its value to 0, but it didnt
> >> work
> >>
> >> Any ideas, guys?
> >>
> >> Thanks in advance
>