What are you looking at ? - nothing much haha just my version of hello world in 3D !! For a while now I've been wanting to dable in a 3D engine but had no clue where to start until recently . I didn't want to use anything existing, just start from scratch and figure it out - have fun along the way. So Day 1 - We have a double buffer in , 256x128 frame buffers so 2 x 16 kb buffers . Line drawing is all in C for now - asm will come eventually, we could have 40% more lines without affecting the frame rate but it just would be harder to see anything until i get colors and solid triangle fills going as well as something that resembles a 3D model. Using a fast movem.l assembly clear from buffer to buffer , so nothing precise but its doing the trick . I first used a DDA algorithm , then Bresenham , then Bresenham + modifcations . Its over 100% faster than where I started today so thats a good start. Not sure where this will go , a boss - maybe will have to see. Work continues on Parodius and we have some pretty cool bits to show on that soon . #SGDK #SegaGenesis #MegaDrive

** Sega Genesis 3D engine Day 2 ** Added solid filled triangles. Added colors ( full 15 color buffer ) . All code in C so far apart form the buffer clear and DMA buffer sending so should be some good speedups to come yet once line / triangle routines are ported to 68k Assembly. I've done basic filling optimisations in C such as where we can write longs eg fill 8 pixels at once for interior parts of the triangle the function will utilise that. Still using 3 divisions per triangle setup , I think i will see if I can use a cheaper reciprical multiplication instead. All rotations vertices are calculated live , in 2d space at present. #SGDK #SegaGenesis #SegaMegadrive