A little Winter Demo by Leosoft

[arnolde]

This is not really a demo, rather a little interactive "seasons greetings" to all Amstradanians out there. It started with me watching too much videos about "Elite" on Youtube and trying to make my own little 3D engine from scratch.
Have fun and enjoy the holidays!

[ervin]

That is very cool!
Nice work.

[lightforce6128]

For our small CPC this is a quite big number of drawn lines. Because the graphics can be influenced, preprocessing is limited.

How did you apply all the necessary multiplications fast enough?

[XeNoMoRPH]

[Kris]

very nice !

[arnolde]

Because the graphics can be influenced, preprocessing is limited.

How did you apply all the necessary multiplications fast enough?

There is indeed no preprocessing at all except for the sin/cos lookup table.
The precision is reduced to the minimum necessary, mostly 8-bit multiplications, the image is not in perspective (z coordinate is not rendered)

The drawing routine only works on a 32 character wide screen and with coordinates from -128 to 127. The routine doesn't check if a line goes over the border and doesn't clip either.

So to get the whole thing to work in a real game will be another task...

[norecess464]

Very nice Kevin ! Great little prod, and I guess you had lots of fun to implement this.

On a side note, is "Leosoft" your new nickname?

[arnolde]

Very nice Kevin ! Great little prod, and I guess you had lots of fun to implement this.

On a side note, is "Leosoft" your new nickname?

Oh, It's an honour to be mistaken for Kevin Thacker! But I'm a different person ;-) I chose the handle "arnolde" without knowing that it's very similar to Kevin's "arnoldemu", because actually it's an anagramme of my real name Leonard.
Thank's for the compliment anyways   

[BSC]

That's a lovely little piece of art. How did you create your models and transfer them onto the CPC? I started working on a 3d engine looong ago and feel intrigued to revive it

[norecess464]

On a side note, is "Leosoft" your new nickname?

Oh, It's an honour to be mistaken for Kevin Thacker! But I'm a different person ;-)

Ahaha opps.

Making a 3D engine is absolutely not an easy task, as it requires great skills of Z80 programming. Congratulations!

[arnolde]

How did you create your models and transfer them onto the CPC?

I was in fact searching the internet for ready-made simple wireframe models, but they all had way too much vertices and lines.
Also, I tried and asked ChatGPT to model me the head of Santa Claus in 3D but that as well was above it's abilities. 
So I ended up with simpler geometric forms and the good old grid paper and pencil method. The base coordinates are rectangles, hexagons or octogons so that wasn't hard to calculate. For projecting "2024" on a cylinder, I wrote a little Locomotive Basic program (which actually gave me a different result than expected...)

[GUNHED]

Well done! 

[eliot]

A nice surprise! Go on with so nice things...  

[Longshot]

Nice rendering. Congratulations on your first 3D engine. 

[Targhan]

Very nice! This is pretty smooth. This could indeed be used in Elite II!

The music has already been uploaded to the Radio .

[arnolde]

The music has already been uploaded to the Radio

Let's hope we don't get a copyright claim from the heirs of Mr. Anderson 

[Optimus]

Great, nice to see some people trying 3d on CPC. Not many demos like that.