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Author Topic: Glib : a 3D graphics axe library  (Read 93970 times)

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Offline willrandship

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Re: GLIB a graphics axe 3d librairy
« Reply #75 on: April 25, 2013, 10:54:36 pm »
Why would anyone but a developer want the source?
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Offline DJ Omnimaga

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Re: GLIB a graphics axe 3d librairy
« Reply #76 on: April 26, 2013, 12:19:41 am »
Quote from: willrandship on April 25, 2013, 10:54:36 pm
Why would anyone but a developer want the source?

To steal it and release it as his own work on ticalc.org. :trollface:
« Last Edit: April 26, 2013, 12:19:52 am by DJ Omnimaga »
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Offline willrandship

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Re: GLIB a graphics axe 3d librairy
« Reply #77 on: April 26, 2013, 12:52:56 am »
They would have to figure out how it works first, so they could modify it enough to make it look different.
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Offline TheMachine02

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Re: GLIB a graphics axe 3d librairy
« Reply #78 on: April 26, 2013, 11:40:30 am »
Quote from: willrandship on April 25, 2013, 10:54:36 pm
Why would anyone but a developer want the source?

it was just to prevent not to download it  ;D
else, here the readme
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Offline Dapianokid

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Re: GLIB a graphics axe 3d librairy
« Reply #79 on: April 26, 2013, 03:51:26 pm »
This is amazing. Somebody write a game already ;)
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Offline TheMachine02

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Re: GLIB a graphics axe 3d librairy
« Reply #80 on: April 28, 2013, 12:48:00 pm »
If someone want to make a game of it, just ask me if there is a problem, or something is not clear...  :)

And of course I will be happy if you credit me and the other developpers  :P .
« Last Edit: April 28, 2013, 12:48:17 pm by TheMachine02 »
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Offline Matrefeytontias

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Re: GLIB a graphics axe 3d librairy
« Reply #81 on: April 28, 2013, 04:13:05 pm »
By seeing the source, it appears that what I can do is already done :/ so I can't really help.
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Offline TheMachine02

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Re: GLIB a graphics axe 3d librairy
« Reply #82 on: April 29, 2013, 10:01:00 am »
I'm sure you can do something. Maybe speed up the GSort() command by changing the sort algorithm ?
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Offline Matrefeytontias

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Re: GLIB a graphics axe 3d librairy
« Reply #83 on: April 29, 2013, 12:49:26 pm »
What does it do already ? Sorting a 2-bytes list ?
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Offline tr1p1ea

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Re: GLIB a graphics axe 3d librairy
« Reply #84 on: April 29, 2013, 06:10:06 pm »
Sorting large lists of vertices can take an annoying amount of time. You may have to experiment with different sorting algorithms to see what gives the best results.
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Offline TheMachine02

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Re: GLIB a graphics axe 3d librairy
« Reply #85 on: April 30, 2013, 08:50:48 am »
The Gsort() command create a 2 bytes list of distance, sort them and give a list of ID like :

{1000,2500,5000,100}  -> list created
{2,1,0,3}  -> list of ID

I'm currently using a O(n²) algorithm, so it's sure it can be optimized  :P

as side part, I work on portal and run some speed test, with a constant speed for clipping :

a large world (256 vertices with 16 portals,16 vertices by sector) are rendering at the speed of +-17 fps  (in wired mode)
so it's perfectly playable !!
I hope the clipping will not be too much slow, tough.

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Offline willrandship

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Re: GLIB a graphics axe 3d librairy
« Reply #86 on: April 30, 2013, 09:07:50 am »
Then, the sorter arranges from highest to lowest. Why do you create a second list? It seems like it would be more efficient in later steps to simply iterate over the list, as opposed to searching through a number list to find the priority.

A good option could be timsort, the sorting function implimented in python. It's one of the best available, and as a bonus, isn't implemented recursively. (IIRC Axe doesn't support recursion, and I blame no one for that) Edit: I'm fairly sure I'm crazy, and timsort probably IS recursive.

Although, it may be better to go with a different route, since these lists will never be longer than 30 or 40 elements. Any faster would probably kill the calc. If we assume this, big-O becomes far less important than the actual equation for the speed.
« Last Edit: April 30, 2013, 09:28:58 am by willrandship »
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Offline Matrefeytontias

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Re: GLIB a graphics axe 3d librairy
« Reply #87 on: April 30, 2013, 09:16:24 am »
So in GSortID, you build a list of X^2+Y^2, and then sort it from greatest to lowest ?

Also, these speed tests are made at 15MHz obviously ?
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Offline TheMachine02

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Re: GLIB a graphics axe 3d librairy
« Reply #88 on: April 30, 2013, 09:21:08 am »
yes that the goal of the GSort()

but, if I delete the cmd, add a GDrwSortArray() cmd, who include direcly the sorting algo with somethng like as willrandship say (if I well understand):
Code: [Select]
for(nb_poly)
CALCULATE DIST
end

for(nb_poly)
for(nb_poly)
find the greatest value in dist list and retrieve ID
end
draw The ID e poly
make the IDe dist value be 0
end


it will be more optimized. (save data)

BUT the algorithm still in O(n²) and optimizable  :P
« Last Edit: April 30, 2013, 09:22:02 am by TheMachine02 »
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Offline willrandship

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Re: GLIB a graphics axe 3d librairy
« Reply #89 on: April 30, 2013, 09:26:42 am »
You don't need to draw during the sort. Just sort the list in-place as opposed to creating a new, still unsorted list.

Are there any assumptions we can make about the output list?
« Last Edit: April 30, 2013, 09:29:32 am by willrandship »
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