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Stop misusing papersprite vars for sprite skew

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fickleheart 2020-01-08 21:52:10 -06:00
parent ef4974ab4d
commit a7edf51cb9
2 changed files with 13 additions and 4 deletions
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12
src/r_things.c
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@ -876,7 +876,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
if (!(vis->scalestep))
{
sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
sprtopscreen += vis->paperdistance * vis->paperoffset;
sprtopscreen += vis->shear.tan * vis->shear.offset;
dc_iscale = FixedDiv(FRACUNIT, vis->scale);
}
@ -922,7 +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, sprtopscreen += vis->paperdistance)
for (dc_x = vis->x1; dc_x <= vis->x2; dc_x++, frac += vis->xiscale, sprtopscreen += vis->shear.tan)
{
#ifdef RANGECHECK
texturecolumn = frac>>FRACBITS;
@ -1220,7 +1220,7 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
shadow->gz = shadow->gzt - shadow->patch->height * shadowyscale;
shadow->texturemid = FixedMul(thing->scale, FixedDiv(shadow->gzt - viewz, shadowyscale));
shadow->scalestep = 0;
shadow->paperdistance = shadowskew; // repurposed variable
shadow->shear.tan = shadowskew; // repurposed variable
shadow->mobj = thing; // Easy access! Tails 06-07-2002
@ -1252,7 +1252,7 @@ static void R_ProjectDropShadow(mobj_t *thing, vissprite_t *vis, fixed_t tx, fix
// reusing x1 variable
x1 += (x2-x1)/2;
shadow->paperoffset = (vis->x1-x1)/2;
shadow->shear.offset = (vis->x1-x1)/2;
if (thing->subsector->sector->numlights)
{
@ -1723,6 +1723,8 @@ static void R_ProjectSprite(mobj_t *thing)
vis->paperoffset = paperoffset;
vis->paperdistance = paperdistance;
vis->centerangle = centerangle;
vis->shear.tan = 0;
vis->shear.offset = 0;
vis->mobj = thing; // Easy access! Tails 06-07-2002
@ -1950,6 +1952,8 @@ static void R_ProjectPrecipitationSprite(precipmobj_t *thing)
vis->texturemid = vis->gzt - viewz;
vis->scalestep = 0;
vis->paperdistance = 0;
vis->shear.tan = 0;
vis->shear.offset = 0;
vis->x1 = x1 < 0 ? 0 : x1;
vis->x2 = x2 >= viewwidth ? viewwidth-1 : x2;

5
src/r_things.h
View file

@ -187,6 +187,11 @@ typedef struct vissprite_s
angle_t centerangle; // for paper sprites
struct {
fixed_t tan; // The amount to shear the sprite vertically per row
INT32 offset; // The center of the shearing location offset from x1
} shear;
fixed_t texturemid;
patch_t *patch;