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Introducing MF2_LINKDRAW! I put it in this branch because it (ab)uses some structural changes I made for papersprites. 

* Sets the sortscale of the mobj to that of its tracer.
* Basically, Smiles' tails won't clip through shields thanks to this.
* http://gfycat.com/GraveGlassEwe
* Also has support for chains of MF2_LINKDRAW!
This commit is contained in:
toasterbabe 2016-09-16 17:09:33 +01:00
parent d17843aee1
commit db6e7fd985
4 changed files with 39 additions and 5 deletions
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1
src/dehacked.c
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@ -6749,6 +6749,7 @@ static const char *const MOBJFLAG2_LIST[] = {
"BOSSFLEE", // Boss is fleeing!
"BOSSDEAD", // Boss is dead! (Not necessarily fleeing, if a fleeing point doesn't exist.)
"AMBUSH", // Alternate behaviour typically set by MTF_AMBUSH
"LINKDRAW",
NULL
};

1
src/p_mobj.h
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@ -192,6 +192,7 @@ typedef enum
MF2_BOSSFLEE = 1<<25, // Boss is fleeing!
MF2_BOSSDEAD = 1<<26, // Boss is dead! (Not necessarily fleeing, if a fleeing point doesn't exist.)
MF2_AMBUSH = 1<<27, // Alternate behaviour typically set by MTF_AMBUSH
MF2_LINKDRAW = 1<<28, // Draw vissprite of mobj immediately before/after tracer's vissprite (dependent on dispoffset and position)
// free: to and including 1<<31
} mobjflag2_t;

38
src/r_things.c
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@ -1119,12 +1119,14 @@ static void R_ProjectSprite(mobj_t *thing)
vissprite_t *vis;
angle_t ang = 0;
angle_t ang = 0; // compiler complaints
fixed_t iscale;
fixed_t scalestep; // toast '16
fixed_t scalestep;
fixed_t offset, offset2;
boolean papersprite = (thing->frame & FF_PAPERSPRITE);
INT32 dispoffset = thing->info->dispoffset;
//SoM: 3/17/2000
fixed_t gz, gzt;
INT32 heightsec, phs;
@ -1312,6 +1314,36 @@ static void R_ProjectSprite(mobj_t *thing)
xscale = FixedMul(xscale, ang_scale);
if ((thing->flags2 & MF2_LINKDRAW) && thing->tracer) // toast 16/09/16 (SYMMETRY)
{
mobj_t *link, *link2;
fixed_t linkscale;
for (link = thing->tracer; (link->tracer && (link->flags2 & MF2_LINKDRAW)); link = link->tracer)
link->flags2 &= ~MF2_LINKDRAW; // to prevent infinite loops, otherwise would just be a ;
for (link2 = thing->tracer; (link2->tracer && (link2 != link)); link2 = link2->tracer)
link->flags2 |= MF2_LINKDRAW; // only needed for correction of the above
if (link->flags2 & MF2_LINKDRAW)
link->flags2 &= ~MF2_LINKDRAW; // let's try and make sure this doesn't happen again...
tr_x = link->x - viewx;
tr_y = link->y - viewy;
gxt = FixedMul(tr_x, viewcos);
gyt = -FixedMul(tr_y, viewsin);
tz = gxt-gyt;
linkscale = FixedDiv(projectiony, tz);
if (tz < FixedMul(MINZ, this_scale))
return;
if (sortscale < linkscale)
dispoffset *= -1; // if it's physically behind, make sure it's ordered behind (if dispoffset > 0)
sortscale = linkscale; // now make sure it's linked
}
// PORTAL SPRITE CLIPPING
if (portalrender)
{
@ -1394,7 +1426,7 @@ static void R_ProjectSprite(mobj_t *thing)
vis->mobjflags = thing->flags;
vis->scale = yscale; //<<detailshift;
vis->sortscale = sortscale;
vis->dispoffset = thing->info->dispoffset; // Monster Iestyn: 23/11/15
vis->dispoffset = dispoffset; // Monster Iestyn: 23/11/15
vis->gx = thing->x;
vis->gy = thing->y;
vis->gz = gz;

4
src/r_things.h
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@ -135,8 +135,8 @@ typedef struct vissprite_s
fixed_t pz, pzt; // physical bottom/top for sorting with 3D floors
fixed_t startfrac; // horizontal position of x1
fixed_t scale, sortscale; // sortscale only differs from scale for flat sprites
fixed_t scalestep; // only for flat sprites, 0 otherwise
fixed_t scale, sortscale; // sortscale only differs from scale for paper sprites and MF2_LINKDRAW
fixed_t scalestep; // only for paper sprites, 0 otherwise
fixed_t xiscale; // negative if flipped
fixed_t texturemid;