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Reduce disappearance of vissprites close to the camera

This commit is contained in:
fickleheart 2019-12-27 11:42:02 -06:00
parent c0380a3052
commit 1790891fd8
1 changed files with 35 additions and 17 deletions
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52
src/r_things.c
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@ -743,10 +743,7 @@ void R_DrawFlippedMaskedColumn(column_t *column, INT32 texheight)
static void R_DrawVisSprite(vissprite_t *vis)
{
column_t *column;
//#ifdef RANGECHECK
#if 1
INT32 texturecolumn;
#endif
fixed_t frac;
patch_t *patch = vis->patch;
fixed_t this_scale = vis->mobj->scale;
@ -899,7 +896,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
if (vis->scalestep)
{
angle_t angle = ((vis->centerangle + xtoviewangle[dc_x]) >> ANGLETOFINESHIFT) & 0xFFF;
texturecolumn = (vis->paperoffset - FixedMul(FINETANGENT(angle), vis->paperdistance)) >> FRACBITS;
texturecolumn = (vis->paperoffset - FixedMul(FINETANGENT(angle), vis->paperdistance)) / this_scale;
if (texturecolumn < 0 || texturecolumn >= SHORT(patch->width))
{
@ -1154,7 +1151,7 @@ static void R_ProjectSprite(mobj_t *thing)
tz = gxt-gyt;
// thing is behind view plane?
if (!(papersprite) && (tz < FixedMul(MINZ, this_scale))) // papersprite clipping is handled later
if (!papersprite && (tz < FixedMul(MINZ, this_scale))) // papersprite clipping is handled later
return;
gxt = -FixedMul(tr_x, viewsin);
@ -1162,7 +1159,7 @@ static void R_ProjectSprite(mobj_t *thing)
tx = -(gyt + gxt);
// too far off the side?
if (abs(tx) > tz<<2)
if (!papersprite && abs(tx) > tz<<2) // papersprite clipping is handled later
return;
// aspect ratio stuff
@ -1291,7 +1288,7 @@ static void R_ProjectSprite(mobj_t *thing)
if (papersprite)
{
fixed_t xscale2, yscale2, cosmul, sinmul, tz2;
fixed_t xscale2, yscale2, cosmul, sinmul, tx2, tz2;
INT32 range;
if (ang >= ANGLE_180)
@ -1309,7 +1306,7 @@ static void R_ProjectSprite(mobj_t *thing)
gyt = -FixedMul(tr_y, viewsin);
tz = gxt-gyt;
yscale = FixedDiv(projectiony, tz);
if (yscale < 64) return; // Fix some funky visuals
//if (yscale < 64) return; // Fix some funky visuals
gxt = -FixedMul(tr_x, viewsin);
gyt = FixedMul(tr_y, viewcos);
@ -1317,10 +1314,6 @@ static void R_ProjectSprite(mobj_t *thing)
xscale = FixedDiv(projection, tz);
x1 = (centerxfrac + FixedMul(tx,xscale))>>FRACBITS;
// off the right side?
if (x1 > viewwidth)
return;
// Get paperoffset (offset) and paperoffset (distance)
paperoffset = -FixedMul(tr_x, cosmul) - FixedMul(tr_y, sinmul);
paperdistance = -FixedMul(tr_x, sinmul) + FixedMul(tr_y, cosmul);
@ -1337,19 +1330,44 @@ static void R_ProjectSprite(mobj_t *thing)
gyt = -FixedMul(tr_y, viewsin);
tz2 = gxt-gyt;
yscale2 = FixedDiv(projectiony, tz2);
if (yscale2 < 64) return; // ditto
//if (yscale2 < 64) return; // ditto
gxt = -FixedMul(tr_x, viewsin);
gyt = FixedMul(tr_y, viewcos);
tx = -(gyt + gxt);
tx2 = -(gyt + gxt);
xscale2 = FixedDiv(projection, tz2);
x2 = ((centerxfrac + FixedMul(tx,xscale2))>>FRACBITS);
x2 = ((centerxfrac + FixedMul(tx2,xscale2))>>FRACBITS);
if (max(tz, tz2) < FixedMul(MINZ, this_scale)) // non-papersprite clipping is handled earlier
return;
// Needs partially clipped
if (tz < FixedMul(MINZ, this_scale))
{
fixed_t div = FixedDiv(tz2-tz, FixedMul(MINZ, this_scale)-tz);
tx += FixedDiv(tx2-tx, div);
tz = FixedMul(MINZ, this_scale);
yscale = FixedDiv(projectiony, tz);
xscale = FixedDiv(projection, tz);
x1 = (centerxfrac + FixedMul(tx,xscale))>>FRACBITS;
}
else if (tz2 < FixedMul(MINZ, this_scale))
{
fixed_t div = FixedDiv(tz-tz2, FixedMul(MINZ, this_scale)-tz2);
tx2 += FixedDiv(tx-tx2, div);
tz2 = FixedMul(MINZ, this_scale);
yscale2 = FixedDiv(projectiony, tz2);
xscale2 = FixedDiv(projection, tz2);
x2 = (centerxfrac + FixedMul(tx2,xscale2))>>FRACBITS;
}
// off the right side?
if (x1 > viewwidth)
return;
// off the left side
if (x2 < 0)
return;
if (max(tz, tz2) < FixedMul(MINZ, this_scale)) // non-papersprite clipping is handled earlier
return;
if ((range = x2 - x1) <= 0)
return;