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Problem change sprite size in game
Posted: Fri Jun 10, 2016 2:19 pm
by dub
Hi,
In game, I change the tile of a sprite, resize the sprite and setposition.
With the old sgdk, all works in on frame.
With the new. The first frame show the new tile but old sprite size and the next frame evrything works.
As an example, made with photoshop to show you
In Purple, 2 sprites (32*32). In yellow, loading new tiles, In green : new sprite size and position.
Code: Select all
//load new bitmap tiles
u16 wm = nTiles.w;
u16 hm = nTiles.h;
VDP_loadBMPTileData((u32*) nTiles.image, nIndex, wm / 8, hm / 8, wm / 8 );
//new position and new size
players[0].posY = FIX32(112) + FIX32(16);
players[1].posY = FIX32(112) + FIX32(32);
players[0].posX = players[1].posX + FIX32(16);
players[0].size_spriteH = 2;
players[0].size_spriteV = 2;
players[1].size_spriteH = 4;
players[1].size_spriteV = 4;
players[1].index = players[0].index + 4;
players[0].numanim++;
//change sprite value
VDP_setSprite(players[0].numSprite, fix32ToInt(players[0].posX), fix32ToInt(players[0].posY), SPRITE_SIZE(players[0].size_spriteH,players[0].size_spriteV), TILE_ATTR_FULL(players[0].nPal, 0, 0, 0, players[0].index));
VDP_setSprite(players[1].numSprite, fix32ToInt(players[1].posX), fix32ToInt(players[1].posY), SPRITE_SIZE(players[1].size_spriteH,players[1].size_spriteV), TILE_ATTR_FULL(players[1].nPal, 0, 0, 0, players[1].index) );
Re: Problem change sprite size in game
Posted: Fri Jun 10, 2016 8:36 pm
by Stef
Where are you calling VDP_updateSprites(..) method ? You need it to actually send sprite to VDP.
I guess the tiles are uploaded 1 frame before you update the sprite list in VRAM.
Re: Problem change sprite size in game
Posted: Sun Jun 12, 2016 9:14 am
by dub
Stef wrote:Where are you calling VDP_updateSprites(..) method ? You need it to actually send sprite to VDP.
I guess the tiles are uploaded 1 frame before you update the sprite list in VRAM.
Yes, it's exactly this.
I code like this :
Code: Select all
while(1)
{
PL_handleInput(); //sprite changing
VDP_updateSprites(10, TRUE);
VDP_waitVSync();
}
I'll try too with "VDP_updateSprites(10, FALSE);"
I certainly made a mistake elsewhere. : Mr. Green:
Re: Problem change sprite size in game
Posted: Sun Jun 12, 2016 10:34 am
by Stef
Using FALSE will send sprites to VDP immediately while TRUE use DMA queue (so sprites are sent at next vblank).
Ideally you should use DMA queue for everything (even from tile loading) but i need to modify some of SGDK methods so they does support DMA queue
Re: Problem change sprite size in game
Posted: Tue Jun 14, 2016 3:39 pm
by dub
Thanks a lot
And I look to change the VDP_loadBMPTileData by VDP_loadTileSet for in game dma use.
Re: Problem change sprite size in game
Posted: Tue Jun 14, 2016 6:17 pm
by Stef
Yeah you should change that as loadBMPData is normally for the bitmap mode
Re: Problem change sprite size in game
Posted: Sat Jun 25, 2016 10:02 am
by dub
I have a question about the spriteengine.
I never test it with the old version, maybe it's normal and I need to test with my code.
I have a metasprite. I use SPRITE player_sprite "sprite/player.png" 4 8 FAST 5
So I have one sprite (32*64pixels) in my sprites array at value 0 equal sprite number 0 and sprite number 1 in the sprite list.
I look the sprite list debug and when my "second" sprites go outside the screen (> 224), it'll become invisible. That's fine. But if I flip the sprite Horizontally, only the visible sprite flip.
You can see his shoes - not flip
I hope I'm clear.
Re: Problem change sprite size in game
Posted: Sat Jun 25, 2016 10:56 am
by Stef
Is this visible only in the sprite debug stuff ? Or you mean that it was flipped partially out screen then later it showed incorrectly flipped feet ?
Because if you speak about only debug view but screen is correct then that is expected
Re: Problem change sprite size in game
Posted: Sat Jun 25, 2016 2:00 pm
by dub
No, I mean that it was flipped partially out screen then later it showed incorrectly flipped feet. I only use the debug to test the value.
I move down the sprite of sonic, use "SPR_setHFlip(sprites[0], TRUE);" to flip and move up the sprite :
Code: Select all
SPRITE sonic_sprite "sprite/sonic.png" 6 6 0 5
// init sonic sprite
sprites[0] = SPR_addSprite(&sonic_sprite, fix32ToInt(posx - camposx), fix32ToInt(posy - camposy), TILE_ATTR(PAL2, TRUE, FALSE, FALSE));
It's the same when I test above the top of the screen.
Re: Problem change sprite size in game
Posted: Sat Jun 25, 2016 5:45 pm
by Stef
Oh ok in this case that is an issue, thanks for reporting
What you can in the meantime is to use the SPR_setVisibility(..) method with fast visibility calculation so it won't ignore not visible sprite.
Re: Problem change sprite size in game
Posted: Sun Jun 26, 2016 7:03 am
by dub
Thanks, I'll use that.