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Merge branch 'fof-slope-skew' into 'master'

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FOF wall slope skewing

FOF walls now can optionally skew with respect to slopes (software mode only currently):

* Upper Unpegged on the CONTROL linedef enables wall skewing
* Lower Unpegged on the IN-LEVEL linedefs ^1 determine which slope to skew with respect to (off = top slope, on = bottom slope)
* If Transfer Line is used however, Lower Unpegged on the control sector's linedefs does the above's job instead

^1 (this is because they already control pegging of individual FOF walls as it is, so this is for convenience and my sanity that they also deal with skewing)

See merge request !39
This commit is contained in:
Monster Iestyn 2016-10-07 17:29:21 -04:00
commit f43d615607
1 changed files with 67 additions and 9 deletions
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76
src/r_segs.c
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@ -728,6 +728,12 @@ void R_RenderThickSideRange(drawseg_t *ds, INT32 x1, INT32 x2, ffloor_t *pfloor)
// Render FOF sides kinda like normal sides, with the frac and step and everything
// NOTE: INT64 instead of fixed_t because overflow concerns
INT64 top_frac, top_step, bottom_frac, bottom_step;
// skew FOF walls with slopes?
boolean slopeskew = false;
fixed_t ffloortextureslide = 0;
INT32 oldx = -1;
fixed_t left_top, left_bottom; // needed here for slope skewing
pslope_t *skewslope = NULL;
#endif
void (*colfunc_2s) (column_t *);
@ -951,21 +957,71 @@ void R_RenderThickSideRange(drawseg_t *ds, INT32 x1, INT32 x2, ffloor_t *pfloor)
mceilingclip = ds->sprtopclip;
dc_texheight = textureheight[texnum]>>FRACBITS;
#ifdef ESLOPE
// calculate both left ends
if (*pfloor->t_slope)
left_top = P_GetZAt(*pfloor->t_slope, ds->leftpos.x, ds->leftpos.y) - viewz;
else
left_top = *pfloor->topheight - viewz;
if (*pfloor->b_slope)
left_bottom = P_GetZAt(*pfloor->b_slope, ds->leftpos.x, ds->leftpos.y) - viewz;
else
left_bottom = *pfloor->bottomheight - viewz;
skewslope = *pfloor->t_slope; // skew using top slope by default
if (newline)
{
if (newline->flags & ML_DONTPEGTOP)
slopeskew = true;
}
else if (pfloor->master->flags & ML_DONTPEGTOP)
slopeskew = true;
if (slopeskew)
dc_texturemid = left_top;
else
#endif
dc_texturemid = *pfloor->topheight - viewz;
if (newline)
{
offsetvalue = sides[newline->sidenum[0]].rowoffset;
if (newline->flags & ML_DONTPEGBOTTOM)
{
#ifdef ESLOPE
skewslope = *pfloor->b_slope; // skew using bottom slope
if (slopeskew)
dc_texturemid = left_bottom;
else
#endif
offsetvalue -= *pfloor->topheight - *pfloor->bottomheight;
}
}
else
{
offsetvalue = sides[pfloor->master->sidenum[0]].rowoffset;
if (curline->linedef->flags & ML_DONTPEGBOTTOM)
{
#ifdef ESLOPE
skewslope = *pfloor->b_slope; // skew using bottom slope
if (slopeskew)
dc_texturemid = left_bottom;
else
#endif
offsetvalue -= *pfloor->topheight - *pfloor->bottomheight;
}
}
#ifdef ESLOPE
if (slopeskew)
{
angle_t lineangle = R_PointToAngle2(curline->v1->x, curline->v1->y, curline->v2->x, curline->v2->y);
if (skewslope)
ffloortextureslide = FixedMul(skewslope->zdelta, FINECOSINE((lineangle-skewslope->xydirection)>>ANGLETOFINESHIFT));
}
#endif
dc_texturemid += offsetvalue;
//faB: handle case where multipatch texture is drawn on a 2sided wall, multi-patch textures
@ -981,23 +1037,18 @@ void R_RenderThickSideRange(drawseg_t *ds, INT32 x1, INT32 x2, ffloor_t *pfloor)
#ifdef ESLOPE
// Set heights according to plane, or slope, whichever
{
fixed_t left_top, right_top, left_bottom, right_bottom;
fixed_t right_top, right_bottom;
// calculate right ends now
if (*pfloor->t_slope)
{
left_top = P_GetZAt(*pfloor->t_slope, ds->leftpos.x, ds->leftpos.y) - viewz;
right_top = P_GetZAt(*pfloor->t_slope, ds->rightpos.x, ds->rightpos.y) - viewz;
}
else
left_top = right_top = *pfloor->topheight - viewz;
right_top = *pfloor->topheight - viewz;
if (*pfloor->b_slope)
{
left_bottom = P_GetZAt(*pfloor->b_slope, ds->leftpos.x, ds->leftpos.y) - viewz;
right_bottom = P_GetZAt(*pfloor->b_slope, ds->rightpos.x, ds->rightpos.y) - viewz;
}
else
left_bottom = right_bottom = *pfloor->bottomheight - viewz;
right_bottom = *pfloor->bottomheight - viewz;
// using INT64 to avoid 32bit overflow
top_frac = (INT64)centeryfrac - (((INT64)left_top * ds->scale1) >> FRACBITS);
@ -1021,6 +1072,13 @@ void R_RenderThickSideRange(drawseg_t *ds, INT32 x1, INT32 x2, ffloor_t *pfloor)
{
if (maskedtexturecol[dc_x] != INT16_MAX)
{
#ifdef ESLOPE
if (ffloortextureslide) { // skew FOF walls
if (oldx != -1)
dc_texturemid += FixedMul(ffloortextureslide, (maskedtexturecol[oldx]-maskedtexturecol[dc_x])<<FRACBITS);
oldx = dc_x;
}
#endif
// SoM: New code does not rely on R_DrawColumnShadowed_8 which
// will (hopefully) put less strain on the stack.
if (dc_numlights)