TI-Basic 3D Model Viewer

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TI-Basic 3D Model Viewer

Momocody 19 May 2015 16:56

Heyzzah everybody,

I was wondering if I could get any help with coding a 3D model viewer in TI-Basic. The idea I am thinking of is a basic "orbiting" camera tool that would allow one to view a 360 view of a pre-programmed model (maybe once the code is in place for viewing the model, a program to easily create models could be developed). Due to my lack of experience and complete understanding of advanced TI-Basic programming, I require a "teacher" of sorts to explain to me the advanced coding that would need to be used for this project. If you can help, just post below.

Thank you,
-Will

P.S. Sorry for spamming the forum, I am only trying to be a contributing and active member (esp. as a new member of this community).

Re: TI-Basic 3D Model Viewer

Michael2_3B 19 May 2015 17:52

Honestly, this is hardly feasible in TI-Basic. You have to calculate the vectors and a bunch of other things I don't even know about. If you tried to do it in Basic it would be incredibly slow. Axe, ASM, or Hybrid Basic would be much better.

Btw, I think you might enjoy looking at <this>

P.S. You're fine, that's pretty much the same thing I did when I was a newbie here ;)

Last edited on 19 May 2015 17:55 by Michael2_3B Show more

Re: TI-Basic 3D Model Viewer

Momocody 19 May 2015 19:02

I like challenges, so I might just try doing this is TI-B. Thanks, m8.

Re: TI-Basic 3D Model Viewer

Michael2_3B 19 May 2015 20:18

Well, good luck. If you have any questions, I'd be glad to help you :)

Re: TI-Basic 3D Model Viewer

Momocody 19 May 2015 20:29

Thanks, man.

Re: TI-Basic 3D Model Viewer

(account deleted) 20 May 2015 00:22

Last edited on 01 Apr 2021 12:46 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

Michael2_3B 20 May 2015 00:55

Where is yours? Did you post about it? I would love to see it, even if it's not that fast :)

Re: TI-Basic 3D Model Viewer

(account deleted) 20 May 2015 08:52

Last edited on 01 Apr 2021 12:45 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

Michael2_3B 20 May 2015 11:52

The gif doesn't appear to be working :/

EDIT: nevermind, i see it now :)

Last edited on 21 May 2015 01:58 by Michael2_3B Show more

Re: TI-Basic 3D Model Viewer

(account deleted) 20 May 2015 23:45

Last edited on 01 Apr 2021 12:45 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

lirtosiast 20 May 2015 23:54

I may be able to optimize some small time-intensive sections of the code if you post it here.

Re: TI-Basic 3D Model Viewer

(account deleted) 21 May 2015 00:55

Last edited on 01 Apr 2021 12:45 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

lirtosiast 21 May 2015 01:57

It looks like you're storing multiple 3d coordinates into ∟P3D.

∟P3D=
{x1,y1,z1,?,?,?,boolean,?,x2,y2,z2,x3,y3,z3,x4,y4,z4,x5,y5,z5,x6,y6,z6,scale1,scale2,transl1,transl2}

You may be able to get a speedup if you used one of the following (I'm not sure which one is appropriate):

• a three-row matrix
• three real lists
• a real list and a complex list
• six or seven lists of three elements each

to store your data. What do each of the points represent, and is the output the (x,y) value of the projection of your point to display on the graph?

Additionally, I'm confused about L1. Why does it have dimension 3 at the start and dimension 2 at the end? Do you need a result in L1, or can it be in Ans? Do you need any side effects from this routine (is there something it needs to do other than return a value in L1)?

Mostly for my purposes, I replaced ∟P3D with L₃ in the code below. I made only trivial optimizations, and I assume that you only need the result in Ans, not L1. Don't replace your routine with this until I better understand what's going on.

L₁
If L₃(7
Then
{L₃(9),L₃(10),L₃(11)}-Ans→L₂
{L₃(12),L₃(13),L₃(14
L₁+L₂sum(({L₃(1),L₃(2),L₃(3)}-L₁)Ans)/sum(AnsL₂){L₃(15),L₃(16),L₃(17
End
{L₃(24)sum(Ans{L₃(18),L₃(19),L₃(20)}),L₃(25)sum(Ans{L₃(21),L₃(22),L₃(23
If not(L₃(7
Ans+{L₃(26),L₃(27

Last edited on 21 May 2015 01:59 by lirtosiast Show more

Re: TI-Basic 3D Model Viewer

(account deleted) 21 May 2015 06:05

Last edited on 01 Apr 2021 12:44 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

lirtosiast 21 May 2015 06:32

Hm, I didn't know about the list inside list thing. As for preserving variables, you shouldn't need to preserve letter variables (especially X, Y, and T), and preserving lists isn't necessary either.

Last edited on 21 May 2015 06:34 by lirtosiast Show more

Re: TI-Basic 3D Model Viewer

jonbush 21 May 2015 13:50

I think earthnite actually wants to preserve the settings so that he doesn't have to enter them again after running another program that uses variables or lists.

Re: TI-Basic 3D Model Viewer

(account deleted) 21 May 2015 16:18

Last edited on 01 Apr 2021 12:44 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

12Me21 21 May 2015 01:08

It wasn't working for me earlier today, when I was using google chrome, but it works in firefox.

Re: TI-Basic 3D Model Viewer

TSelden1209 15 Oct 2020 23:06

This might just be because I'm a beginner, but this is extremely impressive. I'm blown away that people can do this kind of stuff with ti basic.

Re: TI-Basic 3D Model Viewer

Momocody 20 May 2015 13:30

I posted this thread in 'Project Ideas' for a reason— it's only an idea. (I too would like to see the program's complete source code, like Michael2_3B.)

Re: TI-Basic 3D Model Viewer

12Me21 21 May 2015 14:16

I would recommend not using lists, as they are VERY slow compared to normal variables.
You should use finance variables for the variables you use the most, and normal for the rest, and maybe put them into a list when exiting the program.

Re: TI-Basic 3D Model Viewer

(account deleted) 21 May 2015 16:49

Last edited on 01 Apr 2021 12:44 by (account deleted) Show more

Re: TI-Basic 3D Model Viewer

12Me21 21 May 2015 17:45

I don't think they're faster, though.

Re: TI-Basic 3D Model Viewer

(account deleted) 21 May 2015 22:48

Last edited on 01 Apr 2021 12:43 by (account deleted) Show more