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Simplify the floor splat clipping code a bit

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This commit is contained in:
Jaime Passos 2020-10-14 21:20:37 -03:00
parent b4294220e5
commit bf8bb383ab
3 changed files with 35 additions and 29 deletions
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59
src/r_splats.c
View file

@ -24,8 +24,6 @@ struct rastery_s *prastertab; // for ASM code
static struct rastery_s rastertab[MAXVIDHEIGHT];
static void prepare_rastertab(void);
UINT8 ds_splatclip[MAXVIDWIDTH];
// ==========================================================================
// FLOOR SPLATS
// ==========================================================================
@ -147,7 +145,8 @@ static void rasterize_segment_tex(INT32 x1, INT32 y1, INT32 x2, INT32 y2, INT32
void R_RenderFloorSplat(floorsplat_t *pSplat, vector2_t *verts, vissprite_t *vis)
{
// rasterizing
INT32 miny = viewheight + 1, maxy = 0, y, x1, ry1, x2, y2, i, xclip;
INT32 miny = viewheight + 1, maxy = 0;
INT32 y, x1, ry1, x2, y2, i;
fixed_t offsetx = 0, offsety = 0;
fixed_t step;
@ -289,6 +288,8 @@ void R_RenderFloorSplat(floorsplat_t *pSplat, vector2_t *verts, vissprite_t *vis
for (y = miny; y <= maxy; y++)
{
boolean cliptab[MAXVIDWIDTH+1];
x1 = rastertab[y].minx>>FRACBITS;
x2 = rastertab[y].maxx>>FRACBITS;
@ -304,8 +305,34 @@ void R_RenderFloorSplat(floorsplat_t *pSplat, vector2_t *verts, vissprite_t *vis
if (x1 < 0)
x1 = 0;
if (x2 >= vid.width)
x2 = vid.width - 1;
if (x2 >= viewwidth)
x2 = viewwidth - 1;
if (x1 >= viewwidth || x2 < 0)
continue;
for (i = x1; i <= x2; i++)
cliptab[i] = (y >= mfloorclip[i]);
// clip left
while (cliptab[x1])
{
x1++;
if (x1 >= viewwidth)
break;
}
// clip right
i = x2;
while (i > x1)
{
if (cliptab[i])
x2 = i-1;
i--;
if (i < 0)
break;
}
ds_colormap = vis->colormap;
ds_translation = R_GetSpriteTranslation(vis);
@ -320,28 +347,6 @@ void R_RenderFloorSplat(floorsplat_t *pSplat, vector2_t *verts, vissprite_t *vis
ds_colormap = &vis->extra_colormap->colormap[ds_colormap - colormaps];
}
R_ClipVisSprite(vis, x1-1, x2+1, drawsegs, NULL);
memset(ds_splatclip, 0, sizeof(ds_splatclip));
if (x2 >= x1 && x1 < viewwidth && x1 >= 0)
{
for (xclip = x1; xclip <= x2; xclip++)
{
if (y >= mfloorclip[xclip])
ds_splatclip[xclip] = 1;
}
}
while (ds_splatclip[x1])
x1++;
i = x2;
while (i > x1)
{
if (ds_splatclip[i])
x2 = i-1;
i--;
}
if (!pSplat->tilted)
{
angle = (viewangle + pSplat->angle)>>ANGLETOFINESHIFT;

1
src/r_splats.h
View file

@ -44,7 +44,6 @@ typedef struct floorsplat_s
} floorsplat_t;
void R_RenderFloorSplat(floorsplat_t *pSplat, vector2_t *verts, vissprite_t *vis);
extern UINT8 ds_splatclip[MAXVIDWIDTH];
#endif
#endif /*__R_SPLATS_H__*/

4
src/r_things.c
View file

@ -3213,7 +3213,9 @@ void R_ClipSprites(drawseg_t* dsstart, portal_t* portal)
for (; clippedvissprites < visspritecount; clippedvissprites++)
{
vissprite_t *spr = R_GetVisSprite(clippedvissprites);
R_ClipVisSprite(spr, spr->x1, spr->x2, dsstart, portal);
INT32 x1 = (spr->cut & SC_SPLAT) ? 0 : spr->x1;
INT32 x2 = (spr->cut & SC_SPLAT) ? viewwidth : spr->x2;
R_ClipVisSprite(spr, x1, x2, dsstart, portal);
}
}