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bring back the original Spectre/Invisibility fuzz effect

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Apply the original fix found in @fragglet's repository from Lee's
why_i_left_doom.html. Fixes #33
This commit is contained in:
Fabian Greffrath 2020-01-13 12:08:11 +01:00
parent 3cd2ffdde5
commit 317202c05f
1 changed files with 3 additions and 100 deletions
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103
Source/r_draw.c
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@ -275,7 +275,6 @@ void R_DrawTLColumn (void)
#define FUZZTABLE 50
/*
// killough 11/98: convert fuzzoffset to be screenwidth-independent
static const int fuzzoffset[FUZZTABLE] = {
0,-1,0,-1,0,0,-1,
@ -345,8 +344,10 @@ void R_DrawFuzzColumn(void)
// killough 3/20/98: use fullcolormap instead of colormaps
// killough 11/98: use linesize
*dest = fullcolormap[6*256+dest[fuzzoffset[fuzzpos] ^ linesize]];
// fraggle 1/8/2000: fix with the bugfix from lees
// why_i_left_doom.html
*dest = fullcolormap[6*256+dest[fuzzoffset[fuzzpos++] ^ linesize]];
dest += linesize; // killough 11/98
// Clamp table lookup index.
@ -354,104 +355,6 @@ void R_DrawFuzzColumn(void)
}
while (--count);
}
*/
static const int fuzzoffset[FUZZTABLE] = {
1,0,1,0,1,1,0,
1,1,0,1,1,1,0,
1,1,1,0,0,0,0,
1,0,0,1,1,1,1,0,
1,0,1,1,0,0,1,
1,0,0,0,0,1,1,
1,1,0,1,1,0,1
};
static int fuzzpos = 0;
//
// Framebuffer postprocessing.
// Creates a fuzzy image by copying pixels
// from adjacent ones to left and right.
// Used with an all black colormap, this
// could create the SHADOW effect,
// i.e. spectres and invisible players.
//
// haleyjd: 03/24/09: from SMMU v3.10 source. Lee Killough released a patch
// for this problem along with his "Why I Quit Doom" message, but that patch
// was NOT applied to the archived source code on /idgames, and the patch
// itself appears to be forever lost. I have no idea if this code from SMMU
// matches the patch, or if fraggle just wrote it himself without knowledge
// of the existing fix.
// sf: restored original fuzz effect (changed in mbf)
void R_DrawFuzzColumn(void)
{
int count;
byte *dest;
fixed_t frac;
fixed_t fracstep;
// Adjust borders. Low...
if (!dc_yl)
dc_yl = 1;
// .. and high.
if (dc_yh == viewheight-1)
dc_yh = viewheight - 2;
count = dc_yh - dc_yl;
// Zero length.
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned) dc_x >= MAX_SCREENWIDTH
|| dc_yl < 0
|| dc_yh >= MAX_SCREENHEIGHT)
I_Error ("R_DrawFuzzColumn: %i to %i at %i",
dc_yl, dc_yh, dc_x);
#endif
// Keep till detailshift bug in blocky mode fixed,
// or blocky mode removed.
// Does not work with blocky mode.
dest = ylookup[dc_yl] + columnofs[dc_x];
// Looks familiar.
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl-centery)*fracstep;
// Looks like an attempt at dithering,
// using the colormap #6 (of 0-31, a bit brighter than average).
do
{
// Lookup framebuffer, and retrieve
// a pixel that is either one column
// left or right of the current one.
// Add index from colormap to index.
// killough 3/20/98: use fullcolormap instead of colormaps
//sf : hires
*dest = fullcolormap[6*256+
dest[fuzzoffset[fuzzpos] ? SCREENWIDTH<<hires
: -(SCREENWIDTH<<hires)]];
// Clamp table lookup index.
if (++fuzzpos == FUZZTABLE)
fuzzpos = 0;
dest += SCREENWIDTH<<hires;
frac += fracstep;
}
while (count--);
}
//
// R_DrawTranslatedColumn