Stars, planets and point sprites

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Fenerit M
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Re: Stars, planets and point sprites

Post #21by Fenerit » 05.09.2011, 21:10

MiR wrote:Massimo, with "low response" I meant the lack of interest in "point sprites" by our community :wink:
Michael

Ah, ok. :mrgreen:

Maybe because vertex points or point clouds meshes are not so easy to handle. I do not know whether free 3D modelers like Anim8tor or Blender can manage the point clouds. The most easy way to get points with 3D modelers which doesn't handle them, is to export a mesh as .OBJ file without normals and textures and then do remove faces within a text editor; that is, by deleting all the faces' strings and to hold just the vertex. Its main problem is that points' distribution does resemble the meshes' shape; there isn't enough "randomization" into such a method. The basic meshes must be "randomized" for themselves, before to do that. Preliminary "chaotic" sculpting of the meshes can help. :) I use Perl scripts to handle points from OBJ, and for OBJ to CMOD conversion as well.
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Re: Stars, planets and point sprites

Post #22by selden » 06.09.2011, 16:34

I'm guessing that, as with many sophisticated modelling methods, relatively few people on the forum feel they have an adequate background to be able to comment, although I'm sure they're enjoying the pictures.

Anim8or can't do point sprites at all. I don't know about Blender. In other words, one must use some other utility program (similar to how Cham uses Mathematica) to generate an object which uses them.

Also, some older graphics cards can only draw tiny sprites (e.g. 16x16 pixels), so large billboard sprites won't work on systems which have them.
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Re: Stars, planets and point sprites

Post #23by Cham » 06.09.2011, 18:41

Don't forget that spreadsheet apps (Excel, OpenOffice, NeoOffice, ...) can also be used to build sprite based models.

We simply need to define 3D cartesian coordinates for each sprite, plus a column for sprite size, and maybe more columns for color and transparency information. Spreadsheets apps usually have several mathematical functions (MIN, MAX, AVERAGE, ..., RANDOM ?) and the user could define sprite based objects (at least some simple models).

I'm pretty sure we could build shell and disk shaped models this way. Of course, the user need to know some maths in this case. It's not like using a 3D modeler...
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Fenerit M
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Re: Stars, planets and point sprites

Post #24by Fenerit » 06.09.2011, 23:07

Even my CMODtracer :mrgreen: can do that, with few modifications. At least for distributing point sprites on the object's surface, eventually to mark something like airports, industries, wells, etc. Albeit for LOTS of point's distribution can be tedious (too many clicks! :wink: ). Maybe a Perl function to randomly distribute points around a point. :roll: For doing what, I do not know...
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Celestial234
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Re: Stars, planets and point sprites

Post #25by Celestial234 » 12.08.2012, 12:02

There's something weird with mine:
look


[Image Image Image

for 51 pegasi hotted atmosphere and xo-3 hotted atmosphere.

:( why they're squares? i'm so depress when i see them

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Re: Stars, planets and point sprites

Post #26by Fenerit » 12.08.2012, 13:23

for 51 pegasi hotted atmosphere and xo-3 hotted atmosphere.

:( why they're squares? i'm so depress when i see them

:cry:

Hi Michael; what's happen? Do you speak about my example of hotted 51 Pegasi? It work fine for me; no squares at all.
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Re: Stars, planets and point sprites

Post #27by MiR » 12.08.2012, 20:47

Massimo...? Good mornin' :-)

I'm still here, but I didn't have problems with the appearance of point sprites 'round pegasi51/b.

Or... with which "Michael" do you talk to...?

At the moment I'm working on some other projects. I'm still interested in point-sprites, but... too few spare time.
:(

(one of those) Michael ('s) :wink:

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Re: Stars, planets and point sprites

Post #28by Celestial234 » 12.08.2012, 22:04

i'm so depress massimo,
your point sprites is look like rectangles.
what happen with? :cry:

please note because i am not michael, i am celest :|
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Re: Stars, planets and point sprites

Post #29by Fenerit » 12.08.2012, 23:39

Gulp! 8O :( I apologize with both. I didn't mind at the avatar; thus my bad brain did accomplished the equation: 51 Pegasi = Michael (MiR). The causes for the "square" sprites can be several:
1) obsolete graphic drivers; in this case you must update them.
2) you are not in OpenGL 2.0 mode; in this case do cycle through the render paths by pressing Ctrl+v keys until the advertisement on screen;
3) the textures have been replaced with a new one which is not completely transparent at the canvas' borders;
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Re: Stars, planets and point sprites

Post #30by Celestial234 » 13.08.2012, 02:25

Fenerit wrote:1) obsolete graphic drivers; in this case you must update them.

K... i already do the Ctr+v four times and it was the same, i not change the map.
nah! the problem!
how to update the graphic drivers? 8O
i am serious! i dont know how! :oops:

i am so depress.
:cry:
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Celestial234
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Re: Stars, planets and point sprites

Post #31by Celestial234 » 13.08.2012, 02:48

I dont know because:

i use device manager

Image

right click on the intel(r)HD graphic 3000

Image

then i click "Update driver software"
Image

i picked search automaticaly, then it's say because the best driver for my hardware is the same of it! 8O

Very suprising! then... how... o.e

:cry: :oops:
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John Van Vliet
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Re: Stars, planets and point sprites

Post #32by John Van Vliet » 13.08.2012, 05:18

--- edit ---


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