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 <[email protected]>: > 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 <[email protected]>: > > >> >> 2014-04-30 11:32 GMT-07:00 Ronie Salgado <[email protected]>: >> >> 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 <[email protected]>: >>> >>> 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 <[email protected]> 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 ! >>>> >>>> >>>> >>> >> >
