Problem change sprite size in game

[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) );

[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.

[dub]

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:

[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

[dub]

Thanks a lot

And I look to change the VDP_loadBMPTileData by VDP_loadTileSet for in game dma use.

[Stef]

Yeah you should change that as loadBMPData is normally for the bitmap mode

[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.

[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

[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.

[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.

[dub]

Thanks, I'll use that.