//
// R_DrawPlanes
// At the end of each frame.
//
void R_DrawPlane (visplane_t *pl)
{
int light;
int x;
int stop;
int angle;
if (pl->minx > pl->maxx)
return;
// sky flat
if (pl->picnum == skyflatnum)
{
dc_iscale = pspriteiscale>>detailshift;
// Sky is allways drawn full bright,
// i.e. colormaps[0] is used.
// Because of this hack, sky is not affected
// by INVUL inverse mapping.
dc_colormap = colormaps;
dc_texturemid = skytexturemid;
for (x=pl->minx ; x <= pl->maxx ; x++)
{
dc_yl = pl->top[x];
dc_yh = pl->bottom[x];
if (dc_yl <= dc_yh)
{
angle = (viewangle + xtoviewangle[x])>>ANGLETOSKYSHIFT;
dc_x = x;
dc_source = R_GetColumn(skytexture, angle);
colfunc ();
}
}
//
// R_DrawPlanes
// At the end of each frame.
//
void R_DrawPlanes (void)
{
visplane_t* pl;
int light;
int x;
int stop;
int angle;
int lumpnum;
#ifdef RANGECHECK
if (ds_p - drawsegs > MAXDRAWSEGS)
I_Error ("R_DrawPlanes: drawsegs overflow (%i)",
ds_p - drawsegs);
if (lastvisplane - visplanes > MAXVISPLANES)
I_Error ("R_DrawPlanes: visplane overflow (%i)",
lastvisplane - visplanes);
if (lastopening - openings > MAXOPENINGS)
I_Error ("R_DrawPlanes: opening overflow (%i)",
lastopening - openings);
#endif
for (pl = visplanes ; pl < lastvisplane ; pl++)
{
if (pl->minx > pl->maxx)
continue;
// sky flat
if (pl->picnum == skyflatnum)
{
dc_iscale = pspriteiscale>>detailshift;
// Sky is allways drawn full bright,
// i.e. colormaps[0] is used.
// Because of this hack, sky is not affected
// by INVUL inverse mapping.
dc_colormap = colormaps;
dc_texturemid = skytexturemid;
for (x=pl->minx ; x <= pl->maxx ; x++)
{
dc_yl = pl->top[x];
dc_yh = pl->bottom[x];
if (dc_yl <= dc_yh)
{
angle = (viewangle + xtoviewangle[x])>>ANGLETOSKYSHIFT;
dc_x = x;
dc_source = R_GetColumn(skytexture, angle);
colfunc ();
}
}
continue;
}
//
// R_StoreWallRange
//
static void BlastMaskedColumn (void (*blastfunc)(column_t *column), int texnum)
{
if (maskedtexturecol[dc_x] != MAXINT && spryscale > 0)
{
// calculate lighting
if (!fixedcolormap)
{
unsigned index = rw_light >> LIGHTSCALESHIFT; // [RH]
if (index >= MAXLIGHTSCALE)
index = MAXLIGHTSCALE-1;
dc_colormap = walllights[index] + basecolormap; // [RH] add basecolormap
}
// killough 3/2/98:
//
// This calculation used to overflow and cause crashes in Doom:
//
// sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
//
// This code fixes it, by using double-precision intermediate
// arithmetic and by skipping the drawing of 2s normals whose
// mapping to screen coordinates is totally out of range:
{
__int64 t = ((__int64) centeryfrac << FRACBITS) -
(__int64) dc_texturemid * spryscale;
// [RH] This doesn't work properly as-is with freelook. Probably just me.
// if (t + (__int64) textureheight[texnum] * spryscale < 0 ||
// t > (__int64) screen.height << FRACBITS*2)
// continue; // skip if the texture is out of screen's range
sprtopscreen = (fixed_t)(t >> FRACBITS);
}
dc_iscale = 0xffffffffu / (unsigned)spryscale;
// killough 1/25/98: here's where Medusa came in, because
// it implicitly assumed that the column was all one patch.
// Originally, Doom did not construct complete columns for
// multipatched textures, so there were no header or trailer
// bytes in the column referred to below, which explains
// the Medusa effect. The fix is to construct true columns
// when forming multipatched textures (see r_data.c).
// draw the texture
blastfunc ((column_t *)((byte *)R_GetColumn(texnum, maskedtexturecol[dc_x]) -3));
maskedtexturecol[dc_x] = MAXINT;
}
void R_DrawPlanes(void)
{
visplane_t *pl;
int light;
int x, stop;
int lumpnum;
int angle;
byte *tempSource;
byte *dest;
int count;
fixed_t frac, fracstep;
extern byte *ylookup[MAXHEIGHT];
extern int columnofs[MAXWIDTH];
#ifdef RANGECHECK
if (ds_p - drawsegs > numdrawsegs)
I_Error("R_DrawPlanes: drawsegs overflow (%" PRIiPTR ")",
ds_p - drawsegs);
if (lastvisplane - visplanes > numvisplanes)
I_Error("R_DrawPlanes: visplane overflow (%" PRIiPTR ")",
lastvisplane - visplanes);
if (lastopening - openings > MAXOPENINGS)
I_Error("R_DrawPlanes: opening overflow (%" PRIiPTR ")",
lastopening - openings);
#endif
for (pl = visplanes; pl < lastvisplane; pl++)
{
if (pl->minx > pl->maxx)
continue;
//
// sky flat
//
if (pl->picnum == skyflatnum)
{
dc_iscale = skyiscale;
dc_colormap = colormaps; // sky is allways drawn full bright
dc_texturemid = skytexturemid;
dc_texheight = textureheight[skytexture]>>FRACBITS;
for (x = pl->minx; x <= pl->maxx; x++)
{
dc_yl = pl->top[x];
dc_yh = pl->bottom[x];
if ((unsigned) dc_yl <= dc_yh) // [crispy] 32-bit integer math
{
angle = (viewangle + xtoviewangle[x]) >> ANGLETOSKYSHIFT;
dc_x = x;
dc_source = R_GetColumn(skytexture, angle);
count = dc_yh - dc_yl;
if (count < 0)
return;
#ifdef RANGECHECK
if ((unsigned) dc_x >= SCREENWIDTH || dc_yl < 0
|| dc_yh >= SCREENHEIGHT)
I_Error("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh,
dc_x);
#endif
dest = ylookup[dc_yl] + columnofs[dc_x];
fracstep = dc_iscale;
frac = dc_texturemid + (dc_yl - centery) * fracstep;
do
{
*dest = dc_source[frac >> FRACBITS];
dest += SCREENWIDTH;
frac += fracstep;
}
while (count--);
// colfunc ();
}
}
continue;
}
void R_DrawPlanes(void)
{
visplane_t *pl;
int light;
int x, stop;
int angle;
byte *tempSource;
byte *source;
byte *source2;
byte *dest;
int count;
int offset;
int skyTexture;
int offset2;
int skyTexture2;
int scrollOffset;
extern byte *ylookup[MAXHEIGHT];
extern int columnofs[MAXWIDTH];
#ifdef RANGECHECK
if (ds_p - drawsegs > MAXDRAWSEGS)
{
I_Error("R_DrawPlanes: drawsegs overflow (%i)", ds_p - drawsegs);
}
if (lastvisplane - visplanes > MAXVISPLANES)
{
I_Error("R_DrawPlanes: visplane overflow (%i)",
lastvisplane - visplanes);
}
if (lastopening - openings > MAXOPENINGS)
{
I_Error("R_DrawPlanes: opening overflow (%i)",
lastopening - openings);
}
#endif
for (pl = visplanes; pl < lastvisplane; pl++)
{
if (pl->minx > pl->maxx)
{
continue;
}
if (pl->picnum == skyflatnum)
{ // Sky flat
if (DoubleSky)
{ // Render 2 layers, sky 1 in front
offset = Sky1ColumnOffset >> 16;
skyTexture = texturetranslation[Sky1Texture];
offset2 = Sky2ColumnOffset >> 16;
skyTexture2 = texturetranslation[Sky2Texture];
for (x = pl->minx; x <= pl->maxx; x++)
{
dc_yl = pl->top[x];
dc_yh = pl->bottom[x];
if (dc_yl <= dc_yh)
{
count = dc_yh - dc_yl;
if (count < 0)
{
return;
}
angle = (viewangle + xtoviewangle[x])
>> ANGLETOSKYSHIFT;
source = R_GetColumn(skyTexture, angle + offset)
+ SKYTEXTUREMIDSHIFTED + (dc_yl - centery);
source2 = R_GetColumn(skyTexture2, angle + offset2)
+ SKYTEXTUREMIDSHIFTED + (dc_yl - centery);
dest = ylookup[dc_yl] + columnofs[x];
do
{
if (*source)
{
*dest = *source++;
source2++;
}
else
{
*dest = *source2++;
source++;
}
dest += SCREENWIDTH;
}
while (count--);
}
}
continue; // Next visplane
}
else
{ // Render single layer
if (pl->special == 200)
{ // Use sky 2
offset = Sky2ColumnOffset >> 16;
skyTexture = texturetranslation[Sky2Texture];
}
else
{ // Use sky 1
byte* R_GetColumnData(int tex, int col)
{
return R_GetColumn(tex, col)->data();
}
