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FUCK IT, SLOPED SHADOWS NOW

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This commit is contained in:
fickleheart 2019-12-29 20:19:27 -06:00
parent 5929b4797e
commit 9c49e020c3
1 changed files with 67 additions and 9 deletions
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76
src/r_things.c
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@ -876,6 +876,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
if (!(vis->scalestep))
{
sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
sprtopscreen += vis->paperdistance * vis->paperoffset;
dc_iscale = FixedDiv(FRACUNIT, vis->scale);
}
@ -921,7 +922,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
else
{
// Non-paper drawing loop
for (dc_x = vis->x1; dc_x <= vis->x2; dc_x++, frac += vis->xiscale)
for (dc_x = vis->x1; dc_x <= vis->x2; dc_x++, frac += vis->xiscale, sprtopscreen += vis->paperdistance)
{
#ifdef RANGECHECK
texturecolumn = frac>>FRACBITS;
@ -1098,30 +1099,59 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
{
vissprite_t *shadow;
patch_t *patch;
fixed_t xscale, yscale, shadowxscale, shadowyscale, x1, x2;
fixed_t xscale, yscale, shadowxscale, shadowyscale, shadowskew, x1, x2;
INT32 light = 0;
fixed_t scalemul; UINT8 trans;
fixed_t floordiff;
fixed_t floorz;
pslope_t *floorslope;
// Get floorz as the first floor below the object that's visible
floorz = (vis->heightsec != -1) ? sectors[vis->heightsec].floorheight : thing->floorz;
if (vis->sector->ffloors)
floorslope = (vis->heightsec != -1) ? NULL : thing->standingslope;
{
ffloor_t *rover = vis->sector->ffloors;
boolean original = true;
fixed_t z;
for (; rover; rover = rover->next)
if (vis->sector->ffloors)
{
if (!(rover->flags & FF_EXISTS) || !(rover->flags & FF_RENDERPLANES) || (rover->alpha < 90 && !(rover->flags & FF_SWIMMABLE)))
continue;
ffloor_t *rover = vis->sector->ffloors;
z = *rover->t_slope ? P_GetZAt(*rover->t_slope, thing->x, thing->y) : *rover->topheight;
if (z < thing->z+thing->height/3 && z > floorz)
for (; rover; rover = rover->next)
{
if (!(rover->flags & FF_EXISTS) || !(rover->flags & FF_RENDERPLANES) || (rover->alpha < 90 && !(rover->flags & FF_SWIMMABLE)))
continue;
z = *rover->t_slope ? P_GetZAt(*rover->t_slope, thing->x, thing->y) : *rover->topheight;
if (z < thing->z+thing->height/3 && z > floorz)
{
floorz = z;
floorslope = *rover->t_slope;
original = false;
}
else if (original && (*rover->t_slope) && z < thing->z+thing->height/3 && z > floorz - FixedMul(abs((*rover->t_slope)->zdelta), thing->radius*2))
{
// Guesstimated to be a usable floor. This is here to handle floorslope of non-grounded things, I guess.
floorz = z;
floorslope = *rover->t_slope;
original = false;
}
}
}
if (original && vis->sector->f_slope)
{
z = P_GetZAt(vis->sector->f_slope, thing->x, thing->y);
if (z < thing->z+thing->height/3 && z > floorz - FixedMul(abs(vis->sector->f_slope->zdelta), thing->radius*2))
{
floorz = z;
floorslope = vis->sector->f_slope;
}
}
}
if (abs(floorz-viewz)/tz > 4) return; // Prevent stretchy shadows and possible crashes
floordiff = abs(thing->z - floorz);
@ -1136,6 +1166,28 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
yscale = FixedDiv(projectiony, tz);
shadowxscale = FixedMul(thing->radius*2, scalemul) / patch->width;
shadowyscale = FixedMul(FixedMul(thing->radius*2 / patch->height, scalemul), FixedDiv(abs(floorz - viewz), tz));
shadowskew = 0;
if (floorslope)
{
// haha let's try some dumb stuff
fixed_t xslope, zslope;
angle_t sloperelang = (R_PointToAngle(thing->x, thing->y) - floorslope->xydirection) >> ANGLETOFINESHIFT;
xslope = FixedMul(FINESINE(sloperelang), floorslope->zdelta);
zslope = FixedMul(FINECOSINE(sloperelang), floorslope->zdelta);
//CONS_Printf("Shadow is sloped by %d %d\n", xslope, zslope);
if (viewz < floorz)
shadowyscale += FixedMul(FixedMul(thing->radius*2 / patch->height, scalemul), zslope);
else
shadowyscale -= FixedMul(FixedMul(thing->radius*2 / patch->height, scalemul), zslope);
shadowyscale = abs(shadowyscale);
shadowskew = xslope;
}
tx -= patch->width * shadowxscale/2;
x1 = (centerxfrac + FixedMul(tx,xscale))>>FRACBITS;
@ -1164,6 +1216,7 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
shadow->gz = shadow->gzt - shadow->patch->height * shadowyscale;
shadow->texturemid = FixedDiv(shadow->gzt - viewz, shadowyscale);
shadow->scalestep = 0;
shadow->paperdistance = shadowskew; // repurposed variable
shadow->mobj = thing; // Easy access! Tails 06-07-2002
@ -1183,6 +1236,10 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
if (shadow->x1 > x1)
shadow->startfrac += shadow->xiscale*(shadow->x1-x1);
// reusing x1 variable
x1 += (x2-x1)/2;
shadow->paperoffset = (vis->x1-x1)/2;
if (thing->subsector->sector->numlights)
{
INT32 lightnum;
@ -1878,6 +1935,7 @@ static void R_ProjectPrecipitationSprite(precipmobj_t *thing)
vis->pzt = vis->pz + vis->thingheight;
vis->texturemid = vis->gzt - viewz;
vis->scalestep = 0;
vis->paperdistance = 0;
vis->x1 = x1 < 0 ? 0 : x1;
vis->x2 = x2 >= viewwidth ? viewwidth-1 : x2;