[Pharo-dev] how can I have a working roassal 3d ?

Clément Bera bera.clement at gmail.com
Wed Apr 30 22:30:22 EDT 2014


OK, I didn't know it was that complex, I've always used 2D or 3D isometric
until now.

So I can't do it it would take me too much time :-(

I can't wait to see your fractal terrain demo. Keep us in touch.


2014-04-30 18:37 GMT-07:00 Ronie Salgado <roniesalg at gmail.com>:

> You don't draw a shape with an array of points, unless you are using a
> voxel engine or a volumetric renderer. In 3D graphics you usually are
> drawing surfaces composed of triangles. There's R3MeshBuilder and
> R3MeshShape for drawing generic meshes. I believe there examples are a bit
> hidden. For each vertex in a triangle you have specify:
> - Position
> - Surface normal value at position
> - Color
> - Texture coordinates. Used if the material has a texture.
>
> In 3D, the problem of fractals is what kind of fractal you want make. A
> rough classification is like this:
> - 2D textures
> - Solid textures
> - Displacement maps. This is used for terrain heights.
> - Hyper-textures
>
> For images of them, this talk of Ken Perlin
> http://www.noisemachine.com/talk1/  is really good.
> The first three ones are easy to make, but to do them efficiently and
> animated in real-time you need offload the computation to the GPU by using
> shaders or OpenCL.
>
> A hyper texture defines a density function for each point in the space.
> This requires a volumetric renderer. which is really hard to make in
> OpenGL. But you get volumetric smoke, clouds and very cool things.
>
> I actually have to make a demo with fractal/multifractal terrains, for a
> course about computational geometry I am taking, and I choose to use Pharo.
> But I want to use OpenCL for the computation because I can make things more
> flexible easily but in the expense of complicating the synchronization. I
> am starting this personal project to start making a 3D game engine in Pharo
> and also for as an opportunity to take all the low-level graphics out of
> Roassal 3D.
>
> When I have something to show, I will be posting it.
>
> Regards
> Ronie
>
> 2014-04-30 19:43 GMT-04:00 Clément Bera <bera.clement at gmail.com>:
>
>
>>
>> 2014-04-30 11:32 GMT-07:00 Ronie Salgado <roniesalg at gmail.com>:
>>
>> Hi Clément,
>>>
>>> There is not a stable version available, in fact Roassal3D requires the
>>> bleeding edge version of NBOpenGL to work, which is producing your error.
>>> Try loading Roassal3D using the following Gofer script, which is available
>>> in the Roassal3D smalltalk hub
>>> http://smalltalkhub.com/#!/~ronsaldo/roassal3d :
>>>
>>> Gofer new smalltalkhubUser: 'ronsaldo' project: 'roassal3d'; package:
>>> 'ConfigurationOfRoassal3d'; load. (Smalltalk at: #ConfigurationOfRoassal3d)
>>> loadDevelopment
>>>
>>> For 3D fractals, I haven't added support for them. That sounds like an
>>> interesting idea.
>>>
>>
>> What do you mean there is no support for fractals ? Can you draw a 3D
>> shape based on an Array of Point3D ?
>>
>> Fractals are nice because they impress people on demos and they are fun
>> to implement, however I don't know if they represent a common use case for
>> business applications.
>>
>> Regards
>> Clement
>>
>>>
>>> Greetings,
>>> Ronie
>>>
>>>
>>> 2014-04-30 14:09 GMT-04:00 Sven Van Caekenberghe <sven at stfx.eu>:
>>>
>>> The 2D stuff works for me, but there seems to be a problem with the 3D
>>>> stuff.
>>>>
>>>> I hope the Rossal developers can fix this soon, since we're showing off
>>>> Rossal with the 3.0 release....
>>>>
>>>> On 30 Apr 2014, at 18:53, Clément Bera <bera.clement at gmail.com> wrote:
>>>>
>>>> > Hello,
>>>> >
>>>> > I wanted to show some 3D visualization with Pharo to some people
>>>> (because you know, non IT people are only impressed by robots and 3d, so I
>>>> cannot show them a compiler).
>>>> >
>>>> > On the Pharo 3 release, in the configuration browser, I clicked on
>>>> Roassal3d then 'Install stable version'.
>>>> >
>>>> > Then I was not able to run a single example of R3Example, I always
>>>> got:
>>>> >
>>>> > <Screen Shot 2014-04-30 at 9.51.42 AM.png>
>>>> >
>>>> > How can I have an image with Roassal3D working ?
>>>> >
>>>> > I would like to try to draw a 3D fractal too (I love fractals).
>>>> >
>>>> > Thanks !
>>>>
>>>>
>>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.pharo.org/pipermail/pharo-dev_lists.pharo.org/attachments/20140430/fb3eab2c/attachment-0002.html>


More information about the Pharo-dev mailing list