I'm getting closer to understanding how this thing works
I attempted to fade an image in and then out again.
The fading in part works, but when I start fading out, it's palette colours swap to white and then fade to black.
Can anyone help me explain why?
Here's the code I am using (I pasted the full thing, just so you can see what's going on).
Code: Select all
#include <genesis.h>
extern GenResTiles FRBackground;
extern GenResTiles FRLogo;
#define TILEPRIO 0
int main()
{
// Set game to PAL format
VDP_setScreenHeight240();
// Load Data for background
VDP_setPalette(PAL1, FRBackground.pal); // this palette needs to fade
// load tiles in VRAM
// arg0 = tiles data
// arg1 = index for first destination tile
// arg2 = number of tiles to load
// arg3 = use DMA (1) or not (0)
VDP_loadTileData(FRBackground.tiles, TILE_USERINDEX, FRBackground.width*FRBackground.height, 0);
// VDP_loadTileData(FRLogo.tiles, TILE_USERINDEX, FRLogo.width*FRLogo.height, 0);
VDP_fadePalIn(PAL1, FRBackground.pal, 60, 1); // start fading in (before we draw the map, so it doesnt "pop" for a frame)
// Draw images on screen
// arg0 = draw plane (APLAN | BPLAN)
// arg1 = tile data
// arg0 = pallette to use
// arg1 = priority
// arg2 = flip
// arg3 = flip
// arg4 = index
// arg2 = X position
// arg3 = Y position
// arg4 = width (in tiles)
// arg5 = height (in tiles)
VDP_fillTileMapRectInc(APLAN, TILE_ATTR_FULL(PAL1, TILEPRIO, 0, 0, TILE_USERINDEX), 0, 0, FRBackground.width, FRBackground.height);
// VDP_fillTileMapRectInc(BPLAN, TILE_ATTR_FULL(PAL2, TILEPRIO, 0, 0, TILE_USERINDEX + tilesLoaded), 0, 0, FRLogo.width, FRLogo.height);
// "Menu" text
VDP_drawTextBG(BPLAN, "Press start to continue ", TILE_ATTR(PAL0, 1, 0, 0), 8, 24);
// fading
VDP_waitFadeCompletion(); // wait til fade has completed
VDP_setPalette(PAL1, FRBackground.pal); // update palette (after fading, the colours still looked a tint darker)
waitTick(TICKPERSECOND * 2); // wait for 2 seconds
VDP_clearTextBG(BPLAN, 8, 24, 24); // remove text
VDP_fadePalOut(PAL1, 60, 0); // Fade image out
VDP_waitFadeCompletion(); // wait til fade has completed
while(1)
{
//read input
//move sprite
//update score
//draw current screen (logo, start screen, settings, game, gameover, credits...)
//wait for screen refresh
VDP_waitVSync();
}
return (0);
}regards,
Dennis
).