Search found 409 matches

by ob1
Mon Nov 23, 2020 9:10 pm
Forum: Super 32X
Topic: 32X memory type
Replies: 5
Views: 3444

Re: 32X memory type

I hate to "raise topics from their grave", but I really hope you dear reader will find some resources of interest in this post. So, regarding memory type, here are the Bus State Controler settings made in BIOS : value_offset_348h: DC.L $A55A0001 ; BCR1 Bus Control Register 1 (FFFF FFE0) Master, Big-...
by ob1
Tue Dec 24, 2019 9:11 am
Forum: Demos
Topic: Mode 7 demo for Genesis/MD
Replies: 56
Views: 41954

Re: Mode 7 demo for Genesis/MD

#SlowClap

Bravo !
A hell of an update !
by ob1
Thu May 10, 2018 2:07 pm
Forum: Super 32X
Topic: Glide 32X
Replies: 8
Views: 8488

Re: Glide 32X

Great answer and lots of useful informations, as usual. Thank you very much Chilly ^^
by ob1
Wed May 09, 2018 6:01 pm
Forum: Super 32X
Topic: Glide 32X
Replies: 8
Views: 8488

Re: Glide 32X

OR,
I could use 32X Auto Fill and climb from 8 to 68 triangles per frame.
Still a pity, but ...
by ob1
Wed May 09, 2018 9:16 am
Forum: Super 32X
Topic: Glide 32X
Replies: 8
Views: 8488

Re: Glide 32X

I've stated fixed-decimal, but only the representation is decimal (10 bits for the integer part, 5 bits for the "fractional" part).
My implementation uses something between Digital Differential Analyzer and Bresenham's line algorithm.
PS : didn't know of GDM. Thx.
by ob1
Wed May 09, 2018 6:55 am
Forum: Super 32X
Topic: Glide 32X
Replies: 8
Views: 8488

Glide 32X

All right, I've been trying - for long - to make a 3D engine for the 32X. I failed. Twice. At least. But there's no reason not to share a post mortem ^^ So, here is how I compute the slopes of a triangle Raster or how to draw a triangle without grDrawTriangle, a FPU, or even a DIV! Slopes O +---> x ...
by ob1
Sun Feb 04, 2018 10:00 am
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 76619

Re: Unnamed "ninja" game (Dev Diary thread)

Really nice work. Especially if you didn't have a MD before X-mas. Impressive !!
by ob1
Wed Jan 24, 2018 1:14 pm
Forum: Demos
Topic: Teenage Queen MD released :)
Replies: 9
Views: 8282

Re: Teenage Queen MD released :)

Pascal wrote:
Tue Jan 23, 2018 8:18 am
OB1 actualy it's because my previous code was useful to you that i decided to release this one ;)
It indeed was!!!
Thank you very much again ^^
by ob1
Mon Jan 22, 2018 1:25 pm
Forum: Demos
Topic: Teenage Queen MD released :)
Replies: 9
Views: 8282

Re: Teenage Queen MD released :)

Biggest news being Pascal is alive and well ^^

Thanx Pascal ^^
by ob1
Thu Dec 07, 2017 7:21 am
Forum: SGDK
Topic: Transparency on the same Plane, via Tiles
Replies: 8
Views: 3155

Re: Transparency on the same Plane, via Tiles

In mathematics often you have an unique solution (or a group of) and an exact methodology to arrive to that conclusion. Frequently in life you don't have this situation, but you have to chose your own framework to reach to a misty success. (...) In most cases this is the clearly the wining solution...
by ob1
Mon Oct 23, 2017 7:20 am
Forum: Tools
Topic: Algorithm for splitting sprites
Replies: 70
Views: 28372

Re: Algorithm for splitting sprites

It's an algorithm to split big sprites. First it loads a 4bpp bmp file. If the image size is not 8-pixels aligned, it generates the 8-pixels aligned images, with an offset on width and height, up to 49 images (7 pixels width offset x 7 pixels height offset). Then, for each 8-pixels aligned image, it...
by ob1
Sun Oct 22, 2017 10:16 am
Forum: Tools
Topic: Algorithm for splitting sprites
Replies: 70
Views: 28372

Re: Algorithm for splitting sprites

All right. This may not be the BEST algorithm on earth to split sprites and so on. Especially, it doesn't optimize very well "holes" in sprites (an empty tile inside a sprite), but it manages to achieve some neat results. At least, good enough for me. https://www.dropbox.com/s/m3hctty54yox1mj/Street...
by ob1
Mon Oct 16, 2017 3:02 pm
Forum: Demos
Topic: Adventure of Lolo
Replies: 14
Views: 7670

Re: Adventure of Lolo

SegaTim wrote:
Sun Oct 15, 2017 2:42 pm
To do only for itself. And 5-10 SMD fans.
Here's to the crazy ones, the misfits, the rebels...
by ob1
Wed Oct 11, 2017 8:38 am
Forum: Blabla
Topic: Make a wish / What if : Genesis
Replies: 21
Views: 10423

Re: Make a wish / What if : Genesis

Stef wrote:
Tue Oct 10, 2017 2:57 pm
  • 4 palettes for sprite + 4 palettes for BG.
Neat. 8 palettes, and no need to modify background tile or sprite entries (still 2 bits for the palette number).
Stef wrote:
Tue Oct 10, 2017 2:57 pm
I think the rest of the hardware is already perfect :p
:)
by ob1
Tue Oct 10, 2017 12:36 pm
Forum: Blabla
Topic: Make a wish / What if : Genesis
Replies: 21
Views: 10423

Make a wish / What if : Genesis

Reading the TF530 topic (http://gendev.spritesmind.net/forum/viewtopic.php?f=13&t=2721), and just for fun, I thought about a make-a-wish / what if for the Genny. If you could have added one feature, just one, single, feature, what would have it been ? A more-evolved CPU (think about 68010 cache mode...