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Happier try_facespr_intersect()

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I'm prejudiced against 30-line functions with statements nested 5 levels deep.

git-svn-id: https://svn.eduke32.com/eduke32@7933 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2019-08-09 09:28:27 +00:00 committed by Christoph Oelckers
parent 3b98ba6561
commit 41ff733fcd
3 changed files with 36 additions and 44 deletions
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4
source/build/include/build.h
View file

@ -1177,9 +1177,9 @@ int32_t cansee(int32_t x1, int32_t y1, int32_t z1, int16_t sect1,
int32_t inside(int32_t x, int32_t y, int16_t sectnum);
void dragpoint(int16_t pointhighlight, int32_t dax, int32_t day, uint8_t flags);
void setfirstwall(int16_t sectnum, int16_t newfirstwall);
int32_t try_facespr_intersect(uspriteptr_t const spr, const vec3_t *refpos,
int32_t try_facespr_intersect(uspriteptr_t const spr, vec3_t const in,
int32_t vx, int32_t vy, int32_t vz,
vec3_t *intp, int32_t strictly_smaller_than_p);
vec3_t * const intp, int32_t strictly_smaller_than_p);
#define MAXUPDATESECTORDIST 1536
#define INITIALUPDATESECTORDIST 256

74
source/build/src/clip.cpp
View file

@ -1976,51 +1976,43 @@ restart_grand:
// intp: point of currently best (closest) intersection
int32_t try_facespr_intersect(uspriteptr_t const spr, const vec3_t *refpos,
int32_t vx, int32_t vy, int32_t vz,
vec3_t *intp, int32_t strictly_smaller_than_p)
int32_t try_facespr_intersect(uspriteptr_t const spr, vec3_t const in,
int32_t vx, int32_t vy, int32_t vz,
vec3_t * const intp, int32_t strictly_smaller_than_p)
{
const int32_t x1=spr->x, y1=spr->y;
const int32_t xs=refpos->x, ys=refpos->y;
vec3_t const sprpos = spr->pos;
const int32_t topt = vx*(x1-xs) + vy*(y1-ys);
if (topt > 0)
{
const int32_t bot = vx*vx + vy*vy;
if (bot != 0)
{
int32_t i;
const int32_t intz = refpos->z + scale(vz,topt,bot);
const int32_t z1 = spr->z + spriteheightofsptr(spr, &i, 1);
int32_t const topt = vx * (sprpos.x - in.x) + vy * (sprpos.y - in.y);
if (intz >= z1-i && intz <= z1)
{
const int32_t topu = vx*(y1-ys) - vy*(x1-xs);
if (topt <= 0) return 0;
const int32_t offx = scale(vx,topu,bot);
const int32_t offy = scale(vy,topu,bot);
const int32_t dist = offx*offx + offy*offy;
int32_t const bot = vx * vx + vy * vy;
i = tilesiz[spr->picnum].x*spr->xrepeat;
if (dist <= mulscale7(i,i))
{
const int32_t intx = xs + scale(vx,topt,bot);
const int32_t inty = ys + scale(vy,topt,bot);
if (!bot) return 0;
if (klabs(intx-xs)+klabs(inty-ys) + strictly_smaller_than_p
<= klabs(intp->x-xs)+klabs(intp->y-ys))
{
intp->x = intx;
intp->y = inty;
intp->z = intz;
return 1;
}
}
}
}
}
vec3_t newpos = { 0, 0, in.z + scale(vz, topt, bot) };
int32_t siz;
int32_t const z1 = sprpos.z + spriteheightofsptr(spr, &siz, 1);
return 0;
if (newpos.z < z1 - siz || newpos.z > z1)
return 0;
int32_t const topu = vx * (sprpos.y - in.y) - vy * (sprpos.x - in.x);
vec2_t const off = { scale(vx, topu, bot), scale(vy, topu, bot) };
int32_t const dist = off.x * off.x + off.y * off.y;
siz = tilesiz[spr->picnum].x * spr->xrepeat;
if (dist > mulscale7(siz, siz)) return 0;
newpos.vec2 = { in.x + scale(vx, topt, bot), in.y + scale(vy, topt, bot) };
if (klabs(newpos.x - in.x) + klabs(newpos.y - in.y) + strictly_smaller_than_p >
klabs(intp->x - in.x) + klabs(intp->y - in.y))
return 0;
*intp = newpos;
return 1;
}
static inline void hit_set(hitdata_t *hit, int32_t sectnum, int32_t wallnum, int32_t spritenum,
@ -2277,7 +2269,7 @@ restart_grand:
for (z=headspritesect[dasector]; z>=0; z=nextspritesect[z])
{
auto const spr = (uspriteptr_t)&sprite[z];
const int32_t cstat = spr->cstat;
uint32_t const cstat = spr->cstat;
#ifdef USE_OPENGL
if (!hitallsprites)
#endif
@ -2288,7 +2280,7 @@ restart_grand:
// try and see whether this sprite's picnum has sector-like clipping data
i = pictoidx[spr->picnum];
// handle sector-like floor sprites separately
while (i>=0 && (spr->cstat&32) != (clipmapinfo.sector[sectq[clipinfo[i].qbeg]].CM_CSTAT&32))
while (i>=0 && (cstat&32) != (clipmapinfo.sector[sectq[clipinfo[i].qbeg]].CM_CSTAT&32))
i = clipinfo[i].next;
if (i>=0 && clipspritenum<MAXCLIPNUM)
{
@ -2301,7 +2293,7 @@ restart_grand:
{
case 0:
{
if (try_facespr_intersect(spr, sv, vx, vy, vz, &hit->pos, 0))
if (try_facespr_intersect(spr, *sv, vx, vy, vz, &hit->pos, 0))
{
hit->sect = dasector;
hit->wall = -1;

2
source/build/src/engine.cpp
View file

@ -11191,7 +11191,7 @@ void neartag(int32_t xs, int32_t ys, int32_t zs, int16_t sectnum, int16_t ange,
if (((tagsearch&1) && spr->lotag) || ((tagsearch&2) && spr->hitag))
{
if (try_facespr_intersect(spr, &sv, vx, vy, 0, &hitv, 1))
if (try_facespr_intersect(spr, sv, vx, vy, 0, &hitv, 1))
{
*neartagsprite = z;
*neartaghitdist = dmulscale14(hitv.x-xs, sintable[(ange+2560)&2047],