[News][Staff] solidFRAME - a 3D engine for the TI-83+(SE)
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[News][Staff] solidFRAME - a 3D engine for the TI-83+(SE)
Hi guys,
Just thought id let you know that i have uploaded a project to
ticalc.org today. It is a 3D engine for the TI-83+ series calculators.
The program is a 3D model viewer that enables the user to view and
interact with a 3D model in real-time. Note that it renders
flat pattern-shaded polygons. Also included is a utility to convert
Wavefront OBJ models to .8xp programs for use with this
viewer.
It is written in z80 assembly and a 15MHz calculator is recommended.
It is in beta testing so there could be problems. Please report any bugs
if you find any.
Here is a link: http://www.ticalc.org/archives/files/fi ... 45097.html
Also here are some screenies.
Id appreciate feedback if anyone has some.
Enjoy.
Just thought id let you know that i have uploaded a project to
ticalc.org today. It is a 3D engine for the TI-83+ series calculators.
The program is a 3D model viewer that enables the user to view and
interact with a 3D model in real-time. Note that it renders
flat pattern-shaded polygons. Also included is a utility to convert
Wavefront OBJ models to .8xp programs for use with this
viewer.
It is written in z80 assembly and a 15MHz calculator is recommended.
It is in beta testing so there could be problems. Please report any bugs
if you find any.
Here is a link: http://www.ticalc.org/archives/files/fi ... 45097.html
Also here are some screenies.
Id appreciate feedback if anyone has some.
Enjoy.
Last edited by benryves on Sun 11 Jun, 2023 5:03 pm, edited 1 time in total.
Reason: Restored images
Reason: Restored images
- benryves
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Re: solidFRAME - a 3D engine for the TI-83+ (SE Recommended)
Very impressive work - I lack the relevant equipment to install it on a calculator so I played around in an emulator and it seems to work very well indeed. ![Smile :-)](./images/smilies/grayscale_smile.gif)
Do you have any plans for what you'll work on adding next?
![Smile :-)](./images/smilies/grayscale_smile.gif)
Do you have any plans for what you'll work on adding next?
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Re: solidFRAME - a 3D engine for the TI-83+ (SE Recommended)
Hi Ben, Thanks for the quick reply!
.
I need to correct the back-face culling for a start and add polygon clipping i think. Plus i need reorganise the memory structure a little.
For now i might just have a go at making some 3D models to test with
.
![Smile :)](./images/smilies/grayscale_smile.gif)
I need to correct the back-face culling for a start and add polygon clipping i think. Plus i need reorganise the memory structure a little.
For now i might just have a go at making some 3D models to test with
![Smile :)](./images/smilies/grayscale_smile.gif)
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Re: solidFRAME - a 3D engine for the TI-83+ (SE Recommended)
I see - how have you implemented the backface culling at the moment?
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Re: solidFRAME - a 3D engine for the TI-83+ (SE Recommended)
The BFC is very basic, at present i do it after transforming but before projecting using:
; bfc = (x0-x1)*(y2-y1)-(y0-y1)*(x2-x1)
Where the sign is taken to determine which direction the polygon is facing. The error involved means that faces on the boundary between facing and not-facing are sometimes confused.
Ill need to implement it properly in the future.
; bfc = (x0-x1)*(y2-y1)-(y0-y1)*(x2-x1)
Where the sign is taken to determine which direction the polygon is facing. The error involved means that faces on the boundary between facing and not-facing are sometimes confused.
Ill need to implement it properly in the future.
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Re: solidFRAME - a 3D engine for the TI-83+ (SE Recommended)
I gather it's the "before projecting" that is causing the error? Ah well, I look forwards to seeing where you take this next.
Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
Hmm why is the X-Wing model not included? !!! Awesome work.
Revolution Software
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Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
Ill tidy up the xwing model and release if you like.
In the meantime i have been experimenting with basic lighting effects:
![Image](http://img.removedfromgame.com/imgs/polytest34.gif)
Here is a better screenshot of whats going on (i hope):
![Image](http://img.removedfromgame.com/imgs/polytest35.gif)
Also here is the xwing:
![Image](http://img.removedfromgame.com/imgs/polytest36.gif)
In the meantime i have been experimenting with basic lighting effects:
![Image](http://img.removedfromgame.com/imgs/polytest34.gif)
Here is a better screenshot of whats going on (i hope):
![Image](http://img.removedfromgame.com/imgs/polytest35.gif)
Also here is the xwing:
![Image](http://img.removedfromgame.com/imgs/polytest36.gif)
Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
As usual, Pat, you never cease to amaze! This looks just amazing!
Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
The slower-spinning cube does indeed make it more clear what you're doing--and it looks great! Does that work with multiple objects? Does it perform well?
Also, that X-Wing looks great![Smile :)](./images/smilies/grayscale_smile.gif)
Also, that X-Wing looks great
![Smile :)](./images/smilies/grayscale_smile.gif)
Shaun
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Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
I do need to fully implement it so that it is based on an idependant world position as opposed to the camera (was a quick hax), but it supports all objects in the 'world' without any code changes.
Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
That's pretty impressive. What about multiple light-sources?
Shaun
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Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
Well technically it would be possible, but i would have to properly implement lighting as opposed to this hack. That being said, per model lights should be easy too.
Also i have added polygon clipping, but only in 2D which means that any polygons that have a vertex behind the near plane (z=0) will be culled and not clipped as demonstrated in this screenie:
![Image](http://img.removedfromgame.com/imgs/0-polytest38.gif)
Still that only typically happens when you are 'in the middle' of a model so in most cases it should be acceptable.
Also i have added polygon clipping, but only in 2D which means that any polygons that have a vertex behind the near plane (z=0) will be culled and not clipped as demonstrated in this screenie:
![Image](http://img.removedfromgame.com/imgs/0-polytest38.gif)
Still that only typically happens when you are 'in the middle' of a model so in most cases it should be acceptable.
Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
Very, very nice work! I really like the lighting effects.
Good to see someone is still working on a 3D engine![Smile :)](./images/smilies/grayscale_smile.gif)
Good to see someone is still working on a 3D engine
![Smile :)](./images/smilies/grayscale_smile.gif)
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Re: [News][Staff] solidFRAME - a 3D engine for the TI-83+(SE
Oh wow hi yhean!! Long time no see, i hope you're doing well!
Thanks for your kind comments, i remember your 3D engine (juha3D?), it was very impressive and a large inspiration for my interest in calc 3D
.
Good to see you
.
Thanks for your kind comments, i remember your 3D engine (juha3D?), it was very impressive and a large inspiration for my interest in calc 3D
![Smile :)](./images/smilies/grayscale_smile.gif)
Good to see you
![Smile :)](./images/smilies/grayscale_smile.gif)