gl.gbas question for Gernot

[bigsofty]

I guess there is some technical reason I don't know about but in the code below why have you forced the glenum('typ') type to be GL_DOUBLE in quite a few functions within this lib? Is it OK to remove this restriction and use GL_DOUBLE when not using INLINE?

Code (glbasic) Select Expand

INLINE
} extern "C" { void __stdcall glVertexPointer( GLint size , GLenum typ , GLsizei stride , const GLvoid *ptr );; }; namespace __GLBASIC__ {
ENDINLINE
FUNCTION glVertexPointer: size, typ, stride, ptr[]
typ=GL_DOUBLE;
INLINE
OGL glVertexPointer(size, typ, stride, &ptr(0));
ENDINLINE
ENDFUNCTION


That being said would it be OK to use this instead?

Code (glbasic) Select Expand

IMPORT "C" void __stdcall glVertexPointer( int size , unsigned int typ , int stride , void* ptr );

[Kitty Hello]

GLenum is int (simple enum) and GLsizei is unsigned int.
Did I define that as double? That's propably because the wrapper was from when GLB had no integers, yet.

[bigsofty]

OK, thanks, I'll remove them and use IMPORT, since I don't think there needed any more.

P.S. you sure about GLsizei? It's #typedef'ed as just a plain 'int' at the top of the code. Also GLenum is #typedef'ed as 'unsigned int' too.

[Kitty Hello]

On windows I have:

Code (glbasic) Select Expand


typedef unsigned int GLenum;
typedef unsigned char GLboolean;
typedef unsigned int GLbitfield;
typedef signed char GLbyte;
typedef short GLshort;
typedef int GLint;
typedef int GLsizei;


[bigsofty]

Hmm, should I be worried about different GL typedefs for different platforms, the ones that GLB currently support that is?

[Kitty Hello]

usually that doesn't really matter as long as the type size is the same (int=32 bit, short=16 bit, double=64 bit, float=32 bit).

[bigsofty]

Phew!, OK thanks Gernot.

[bigsofty]

I am keeping these all in the one GL thread, I hope no one minds?

Any ways, trying to optimise a particle system that use drawarrays.

Why does this not work, it compiles and runs but there is no output? I am trying to avoid wrapping code, for speed if possible. The wrapped version works fine BTW.

Code (glbasic) Select Expand

INLINE
  glVertexPointer(2, GL_FLOAT, 0, &v(0));
ENDINLINE

Edit:

NM, it needs to be GL_DOUBLE not GL_FLOAT, I would imagine that the mobile platforms need GL_DOUBLE = float, instead?

P.S.

I tried this, to sneakily get around inline at all but still being able to use GLB float arrays...

Code (glbasic) Select Expand

IMPORT "C" void __stdcall glVertexPointer( int size , unsigned int typ , int stride , unsigned int ptr );
ALIAS vPtr AS v#[0]
glVertexPointer(2, GL_FLOAT, 0, vPtr)

...really stretching it here but although it compiles fine, it does not seem to pass on the array pointer, so that's a no go.

[Kitty Hello]

on win/lin/mac GLBasic's DGInt is a double, on others it's float (GL_FLOAT/GL_DOUBLE).

[bigsofty]

OK that's mo big deal then, on mobile I'll just set the constant gl_double = gl_ float for GLES.