Extenion problems :(

ruby-talk
1

I started to write a vector extension to ruby, as a way to get familiar
with it.

[code]
#include "ruby.h"
#include "Vector.h"
#include <stdlib.h>

static void V3Free(void *p)
{
}

static VALUE V3Alloc(VALUE klass)
{
  Vector3 v = Vector3Zero;
  VALUE obj;
  obj = Data_Wrap_Struct(klass, 0, V3Free, &v);
}

static VALUE getX(VALUE self)
{
  Vector3 *v;

  Data_Get_Struct(self, Vector3, v);

  return rb_float_new(v->x);
}

static VALUE getY(VALUE self)
{
  Vector3 *v;

  Data_Get_Struct(self, Vector3, v);

  return rb_float_new(v->y);
}

static VALUE getZ(VALUE self)
{
  Vector3 *v;

  Data_Get_Struct(self, Vector3, v);

  return rb_float_new(v->z);
}

static VALUE rbVector3Initialize(VALUE self, VALUE x, VALUE y, VALUE z)
{
  Vector3 *v;

  Data_Get_Struct(self, Vector3, v);

  v->x = (float)NUM2DBL(x);
  v->y = (float)NUM2DBL(y);
  v->z = (float)NUM2DBL(z);

  return self;
}

VALUE rbVector3Object;

void Init_Vector()
{
  rbVector3Object = rb_define_class("Vector3", rb_cObject);
  rb_define_alloc_func(rbVector3Object, V3Alloc);
  rb_define_method(rbVector3Object, "initialize", rbVector3Initialize,
3);
  rb_define_method(rbVector3Object, "x", getX, 0);
  rb_define_method(rbVector3Object, "y", getY, 0);
  rb_define_method(rbVector3Object, "z", getZ, 0);
}
[/code]

and my ruby test file is:

[code]
require 'Vector'

v = Vector3.new(1, 2, 3)

puts "X: " + v.x.to_s + "\n"
puts "Y: " + v.y.to_s + "\n"
puts "Z: " + v.z.to_s + "\n"
[/code]

The problem is, it outputs Z to be 0, instead of 3. what's wrong? i'm
completely baffled.

Thanks in advance, Duane.

···

--
Posted via http://www.ruby-forum.com/.

2

Hi,

From: duane bailey <bailey.d.r@gmail.com>
Reply-To: ruby-talk@ruby-lang.org
To: ruby-talk@ruby-lang.org (ruby-talk ML)
Subject: extenion problems :frowning:
Date: Tue, 27 Jun 2006 03:51:06 +0900

I started to write a vector extension to ruby, as a way to get familiar
with it.

[code]
#include "ruby.h"
#include "Vector.h"
#include <stdlib.h>

static void V3Free(void *p)
{
}

static VALUE V3Alloc(VALUE klass)
{
Vector3 v = Vector3Zero;
VALUE obj;
obj = Data_Wrap_Struct(klass, 0, V3Free, &v);
}

static VALUE getX(VALUE self)
{
Vector3 *v;

Data_Get_Struct(self, Vector3, v);

return rb_float_new(v->x);
}

static VALUE getY(VALUE self)
{
Vector3 *v;

Data_Get_Struct(self, Vector3, v);

return rb_float_new(v->y);
}

static VALUE getZ(VALUE self)
{
Vector3 *v;

Data_Get_Struct(self, Vector3, v);

return rb_float_new(v->z);
}

static VALUE rbVector3Initialize(VALUE self, VALUE x, VALUE y, VALUE z)
{
Vector3 *v;

Data_Get_Struct(self, Vector3, v);

v->x = (float)NUM2DBL(x);
v->y = (float)NUM2DBL(y);
v->z = (float)NUM2DBL(z);

return self;
}

VALUE rbVector3Object;

void Init_Vector()
{
rbVector3Object = rb_define_class("Vector3", rb_cObject);
rb_define_alloc_func(rbVector3Object, V3Alloc);
rb_define_method(rbVector3Object, "initialize", rbVector3Initialize,
3);
rb_define_method(rbVector3Object, "x", getX, 0);
rb_define_method(rbVector3Object, "y", getY, 0);
rb_define_method(rbVector3Object, "z", getZ, 0);
}
[/code]

and my ruby test file is:

[code]
require 'Vector'

v = Vector3.new(1, 2, 3)

puts "X: " + v.x.to_s + "\n"
puts "Y: " + v.y.to_s + "\n"
puts "Z: " + v.z.to_s + "\n"
[/code]

The problem is, it outputs Z to be 0, instead of 3. what's wrong? i'm
completely baffled.

Thanks in advance, Duane.

static VALUE V3Alloc(VALUE klass)
{
  Vector3 v = Vector3Zero;
  VALUE obj;
  obj = Data_Wrap_Struct(klass, 0, V3Free, &v);
}

should be

static VALUE V3Alloc(VALUE klass)
{
  static Vector3 v;
  VALUE obj;
  obj = Data_Wrap_Struct(klass, 0, V3Free, &v);
                return obj;
}

Regards,

Park Heesob

3

Hi,

At Tue, 27 Jun 2006 03:51:06 +0900,
duane bailey wrote in [ruby-talk:199150]:

static VALUE V3Alloc(VALUE klass)
{

  Vector3 *v = ALLOC(Vector3);
  *v = Vector3Zero;
  rturn Data_Wrap_Struct(klass, 0, -1, v);

···

}

--
Nobu Nakada