Search found 68 matches

by Grind
Mon Mar 16, 2020 7:01 pm
Forum: SGDK
Topic: (my) Problems with VDP_setMapEx()
Replies: 2
Views: 249

Re: Problems with VDP_setMapEx()

It looks like the blue (color index 4 or 13?) is getting drawn instead of the color index 0 (fuchsia in the image). You can see that behind the tower some part of it is transparent. So I think "mapTorre1" has something going on where the unused tiles are not pointing to tile index 0 (which is full t...
by Grind
Fri Mar 13, 2020 6:39 pm
Forum: SGDK
Topic: The small-questions-not-worth-dedicated-topics topic
Replies: 5
Views: 446

Re: The small-questions-not-worth-dedicated-topics topic

You said "platforms" so I'm going to assume you are making a platformer :P It doesn't matter too much how you organize it, and most stuff can just stay in ROM without consuming any memory. Games like this (well, even top down RPGs too) organize maps like: Tile set - The list of available tile graphi...
by Grind
Wed Feb 19, 2020 4:13 am
Forum: SGDK
Topic: Gendev getting started help
Replies: 1
Views: 1819

Re: Gendev getting started help

There is a link named releases near the top of the page.
by Grind
Thu Jan 16, 2020 1:23 am
Forum: SGDK
Topic: Horizontal Scroll not showing all background image
Replies: 20
Views: 4131

Re: Horizontal Scroll not showing all background image

Offset 0 is always going to be the leftmost pixel/tile of the screen. Have to move it back and wrap it. VDP_setMapEx(PLAN_B, bgd_image.map, TILE_ATTR_FULL(PAL2, FALSE, FALSE, FALSE, TILE_USERINDEX),offsetTILES, 0, (offsetTILES-1) % 128 , 0, 1, 28); Try that? That -1 could be anything else depending ...
by Grind
Fri Sep 13, 2019 2:54 pm
Forum: SGDK
Topic: Scrolling only one row.
Replies: 5
Views: 2378

Re: Scrolling only one row.

It wants an array of values to set the scroll lines to rather than a single value. If you are only scrolling one line the array only needs to have one element. s16 val[1] = { 8 }; VDP_setHorizontalScrollTile (PLAN_A, 0, val, 1, FALSE); The 4th argument is the length of the array so you could do the ...
by Grind
Sun Mar 03, 2019 4:34 pm
Forum: SGDK
Topic: Simple noob Pals/tiles question
Replies: 13
Views: 3418

Re: Simple noob Pals/tiles question

The last argument of TILE_ATTR_FULL is the tile index. That should be ind. You can replace TILE_USERINDEX with 1 if you don't care about those 15 boxes at the start of VRAM. // load bitmap data of block in VRAM and draw ind = TILE_USERINDEX; VDP_drawImageEx(PLAN_A, &block , TILE_ATTR_FULL(PAL0, 0, 0...
by Grind
Sun Mar 03, 2019 2:16 pm
Forum: SGDK
Topic: Simple noob Pals/tiles question
Replies: 13
Views: 3418

Re: Simple noob Pals/tiles question

The first palette has dark gray in color index 2 which the moon uses, the second palette has white in color index 2. So when you show the moon tiles with the second palette, it gets drawn with white at index 2 and black everywhere else. I'm not sure if I understand your question at the end. You can ...
by Grind
Mon Feb 25, 2019 1:12 am
Forum: SGDK
Topic: Simple noob Pals/tiles question
Replies: 13
Views: 3418

Re: Simple noob Pals/tiles question

SGDK loads solid blocks of each palette color into the first 16 tiles in VRAM by default. That's why TILE_USERINDEX is 16. You can ignore/overwrite them if you don't use them, though. And I think that 5th palette is just a Gens Kmod thing. For example if your game fades to black (all 4 palettes go b...
by Grind
Mon Oct 22, 2018 3:18 am
Forum: SGDK
Topic: Question about VDP_showFPS
Replies: 6
Views: 1749

Re: Question about VDP_showFPS

TRUE and FALSE are an alias for 1 and 0 in SGDK (in types.h iirc) so they can work as an int of any size.
by Grind
Mon Sep 10, 2018 1:56 pm
Forum: SGDK
Topic: Basic syntax issue with VDP_drawImageEx();
Replies: 7
Views: 2066

Re: Basic syntax issue with VDP_drawImageEx();

There could be something about the previous line it doesn't like, but it looks fine to me. Is "ind" supposed to be the name of the variable here? That doesn't match the code snippet above.

My other guess is there is an extra "}" somewhere that didn't get commented with the rest of its block.
by Grind
Wed Mar 21, 2018 3:25 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 54899

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

Are you using tile/line hoz scroll instead of plane scroll? Perhaps VDP_init() doesn't set the mode back to plane but didn't check myself. To expand on the debug assertion idea, GCC provides the macros __FILE__, __LINE__, and __FUNCTION__, which could be fed to an error handler if an assertion fails...
by Grind
Tue Mar 20, 2018 6:53 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 54899

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

I've gotten burned by this one so many times. I think adding bounds checking for debug only would be very helpful to catch this stuff.

Good pull request idea maybe :P
by Grind
Fri Mar 16, 2018 3:53 pm
Forum: Demos
Topic: Tänzer, a "ninja" game (Dev Diary thread)
Replies: 290
Views: 54899

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

Is the crash a hang, or is there some kind of error message (like address error)?

I know BlastEm has caught some of my hangs, like when my game tried to read cram in write mode. So give that a try if it is hanging.
by Grind
Fri Mar 16, 2018 2:10 pm
Forum: SGDK
Topic: Rescomp colour conversion
Replies: 3
Views: 1153

Re: Rescomp colour conversion

Looks like it uses the standard. In tools/rescomp/src/tools.c: unsigned short toVDPColor(unsigned char b, unsigned char g, unsigned char r) { // genesis only define on 3 bits (but shifted to 1 left) r = (r >> 4) & 0xE; g = (g >> 4) & 0xE; b = (b >> 4) & 0xE; return (r << 0) | (g << 4) | (b << 8); }
by Grind
Thu Mar 08, 2018 4:14 am
Forum: SGDK
Topic: Transparent WINDOW
Replies: 5
Views: 1348

Re: Transparent WINDOW

Window replaces Plane A, so they cannot be drawn over the same area at the same time. It is a limitation of the VDP. I believe sonic uses sprites for the HUD.